WO2023145408A1 - 積層ポリエステルフィルム - Google Patents
積層ポリエステルフィルム Download PDFInfo
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- WO2023145408A1 WO2023145408A1 PCT/JP2023/000208 JP2023000208W WO2023145408A1 WO 2023145408 A1 WO2023145408 A1 WO 2023145408A1 JP 2023000208 W JP2023000208 W JP 2023000208W WO 2023145408 A1 WO2023145408 A1 WO 2023145408A1
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- Prior art keywords
- resin
- acid
- mass
- coating layer
- contact angle
- Prior art date
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- 229920006267 polyester film Polymers 0.000 title claims abstract description 46
- 229920005749 polyurethane resin Polymers 0.000 claims abstract description 79
- 229920000178 Acrylic resin Polymers 0.000 claims abstract description 69
- 239000004925 Acrylic resin Substances 0.000 claims abstract description 69
- 229920001225 polyester resin Polymers 0.000 claims abstract description 69
- 239000004645 polyester resin Substances 0.000 claims abstract description 68
- 239000011247 coating layer Substances 0.000 claims abstract description 60
- 239000000203 mixture Substances 0.000 claims abstract description 37
- DLKQHBOKULLWDQ-UHFFFAOYSA-N 1-bromonaphthalene Chemical compound C1=CC=C2C(Br)=CC=CC2=C1 DLKQHBOKULLWDQ-UHFFFAOYSA-N 0.000 claims abstract description 19
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- 239000010408 film Substances 0.000 description 44
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- -1 polyethylene terephthalate Polymers 0.000 description 43
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- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 26
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- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 18
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 18
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- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 10
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- SLCVBVWXLSEKPL-UHFFFAOYSA-N neopentyl glycol Chemical compound OCC(C)(C)CO SLCVBVWXLSEKPL-UHFFFAOYSA-N 0.000 description 10
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- 229920002799 BoPET Polymers 0.000 description 5
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- 230000000052 comparative effect Effects 0.000 description 5
- KORSJDCBLAPZEQ-UHFFFAOYSA-N dicyclohexylmethane-4,4'-diisocyanate Chemical compound C1CC(N=C=O)CCC1CC1CCC(N=C=O)CC1 KORSJDCBLAPZEQ-UHFFFAOYSA-N 0.000 description 5
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- QMKYBPDZANOJGF-UHFFFAOYSA-N benzene-1,3,5-tricarboxylic acid Chemical compound OC(=O)C1=CC(C(O)=O)=CC(C(O)=O)=C1 QMKYBPDZANOJGF-UHFFFAOYSA-N 0.000 description 2
- PXKLMJQFEQBVLD-UHFFFAOYSA-N bisphenol F Chemical compound C1=CC(O)=CC=C1CC1=CC=C(O)C=C1 PXKLMJQFEQBVLD-UHFFFAOYSA-N 0.000 description 2
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- 238000007766 curtain coating Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- QYQADNCHXSEGJT-UHFFFAOYSA-N cyclohexane-1,1-dicarboxylate;hydron Chemical compound OC(=O)C1(C(O)=O)CCCCC1 QYQADNCHXSEGJT-UHFFFAOYSA-N 0.000 description 1
- QSAWQNUELGIYBC-UHFFFAOYSA-N cyclohexane-1,2-dicarboxylic acid Chemical compound OC(=O)C1CCCCC1C(O)=O QSAWQNUELGIYBC-UHFFFAOYSA-N 0.000 description 1
- HPXRVTGHNJAIIH-UHFFFAOYSA-N cyclohexanol Chemical compound OC1CCCCC1 HPXRVTGHNJAIIH-UHFFFAOYSA-N 0.000 description 1
- KBLWLMPSVYBVDK-UHFFFAOYSA-N cyclohexyl prop-2-enoate Chemical compound C=CC(=O)OC1CCCCC1 KBLWLMPSVYBVDK-UHFFFAOYSA-N 0.000 description 1
- STZIXLPVKZUAMV-UHFFFAOYSA-N cyclopentane-1,1,2,2-tetracarboxylic acid Chemical compound OC(=O)C1(C(O)=O)CCCC1(C(O)=O)C(O)=O STZIXLPVKZUAMV-UHFFFAOYSA-N 0.000 description 1
- FWLDHHJLVGRRHD-UHFFFAOYSA-N decyl prop-2-enoate Chemical compound CCCCCCCCCCOC(=O)C=C FWLDHHJLVGRRHD-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 125000004386 diacrylate group Chemical group 0.000 description 1
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 description 1
- 229940028356 diethylene glycol monobutyl ether Drugs 0.000 description 1
- XXJWXESWEXIICW-UHFFFAOYSA-N diethylene glycol monoethyl ether Chemical compound CCOCCOCCO XXJWXESWEXIICW-UHFFFAOYSA-N 0.000 description 1
- 229940075557 diethylene glycol monoethyl ether Drugs 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- VNGOYPQMJFJDLV-UHFFFAOYSA-N dimethyl benzene-1,3-dicarboxylate Chemical compound COC(=O)C1=CC=CC(C(=O)OC)=C1 VNGOYPQMJFJDLV-UHFFFAOYSA-N 0.000 description 1
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 description 1
- GWZCCUDJHOGOSO-UHFFFAOYSA-N diphenic acid Chemical compound OC(=O)C1=CC=CC=C1C1=CC=CC=C1C(O)=O GWZCCUDJHOGOSO-UHFFFAOYSA-N 0.000 description 1
- SZXQTJUDPRGNJN-UHFFFAOYSA-N dipropylene glycol Chemical compound OCCCOCCCO SZXQTJUDPRGNJN-UHFFFAOYSA-N 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 239000003759 ester based solvent Substances 0.000 description 1
- 230000032050 esterification Effects 0.000 description 1
- UIWXSTHGICQLQT-UHFFFAOYSA-N ethenyl propanoate Chemical compound CCC(=O)OC=C UIWXSTHGICQLQT-UHFFFAOYSA-N 0.000 description 1
- 239000004210 ether based solvent Substances 0.000 description 1
- 125000001033 ether group Chemical group 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- XYIBRDXRRQCHLP-UHFFFAOYSA-N ethyl acetoacetate Chemical compound CCOC(=O)CC(C)=O XYIBRDXRRQCHLP-UHFFFAOYSA-N 0.000 description 1
- GBASTSRAHRGUAB-UHFFFAOYSA-N ethylenetetracarboxylic dianhydride Chemical compound O=C1OC(=O)C2=C1C(=O)OC2=O GBASTSRAHRGUAB-UHFFFAOYSA-N 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000001530 fumaric acid Substances 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- ANSXAPJVJOKRDJ-UHFFFAOYSA-N furo[3,4-f][2]benzofuran-1,3,5,7-tetrone Chemical compound C1=C2C(=O)OC(=O)C2=CC2=C1C(=O)OC2=O ANSXAPJVJOKRDJ-UHFFFAOYSA-N 0.000 description 1
- 150000002291 germanium compounds Chemical class 0.000 description 1
- 238000007756 gravure coating Methods 0.000 description 1
- 239000012760 heat stabilizer Substances 0.000 description 1
- KWLMIXQRALPRBC-UHFFFAOYSA-L hectorite Chemical compound [Li+].[OH-].[OH-].[Na+].[Mg+2].O1[Si]2([O-])O[Si]1([O-])O[Si]([O-])(O1)O[Si]1([O-])O2 KWLMIXQRALPRBC-UHFFFAOYSA-L 0.000 description 1
- 229910000271 hectorite Inorganic materials 0.000 description 1
- NGAZZOYFWWSOGK-UHFFFAOYSA-N heptan-3-one Chemical compound CCCCC(=O)CC NGAZZOYFWWSOGK-UHFFFAOYSA-N 0.000 description 1
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 1
- LNMQRPPRQDGUDR-UHFFFAOYSA-N hexyl prop-2-enoate Chemical compound CCCCCCOC(=O)C=C LNMQRPPRQDGUDR-UHFFFAOYSA-N 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 230000009878 intermolecular interaction Effects 0.000 description 1
- GJRQTCIYDGXPES-UHFFFAOYSA-N iso-butyl acetate Natural products CC(C)COC(C)=O GJRQTCIYDGXPES-UHFFFAOYSA-N 0.000 description 1
- FGKJLKRYENPLQH-UHFFFAOYSA-M isocaproate Chemical compound CC(C)CCC([O-])=O FGKJLKRYENPLQH-UHFFFAOYSA-M 0.000 description 1
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 description 1
- JMMWKPVZQRWMSS-UHFFFAOYSA-N isopropanol acetate Natural products CC(C)OC(C)=O JMMWKPVZQRWMSS-UHFFFAOYSA-N 0.000 description 1
- 229940011051 isopropyl acetate Drugs 0.000 description 1
- GWYFCOCPABKNJV-UHFFFAOYSA-N isovaleric acid Chemical compound CC(C)CC(O)=O GWYFCOCPABKNJV-UHFFFAOYSA-N 0.000 description 1
- OQAGVSWESNCJJT-UHFFFAOYSA-N isovaleric acid methyl ester Natural products COC(=O)CC(C)C OQAGVSWESNCJJT-UHFFFAOYSA-N 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 239000005453 ketone based solvent Substances 0.000 description 1
- 238000007759 kiss coating Methods 0.000 description 1
- 150000002596 lactones Chemical class 0.000 description 1
- PBOSTUDLECTMNL-UHFFFAOYSA-N lauryl acrylate Chemical compound CCCCCCCCCCCCOC(=O)C=C PBOSTUDLECTMNL-UHFFFAOYSA-N 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 125000005395 methacrylic acid group Chemical group 0.000 description 1
- UZKWTJUDCOPSNM-UHFFFAOYSA-N methoxybenzene Substances CCCCOC=C UZKWTJUDCOPSNM-UHFFFAOYSA-N 0.000 description 1
- 229940017219 methyl propionate Drugs 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- WHIVNJATOVLWBW-UHFFFAOYSA-N n-butan-2-ylidenehydroxylamine Chemical compound CCC(C)=NO WHIVNJATOVLWBW-UHFFFAOYSA-N 0.000 description 1
- KYTZHLUVELPASH-UHFFFAOYSA-N naphthalene-1,2-dicarboxylic acid Chemical class C1=CC=CC2=C(C(O)=O)C(C(=O)O)=CC=C21 KYTZHLUVELPASH-UHFFFAOYSA-N 0.000 description 1
- FZZQNEVOYIYFPF-UHFFFAOYSA-N naphthalene-1,6-diol Chemical compound OC1=CC=CC2=CC(O)=CC=C21 FZZQNEVOYIYFPF-UHFFFAOYSA-N 0.000 description 1
- HRRDCWDFRIJIQZ-UHFFFAOYSA-N naphthalene-1,8-dicarboxylic acid Chemical compound C1=CC(C(O)=O)=C2C(C(=O)O)=CC=CC2=C1 HRRDCWDFRIJIQZ-UHFFFAOYSA-N 0.000 description 1
- KHARCSTZAGNHOT-UHFFFAOYSA-N naphthalene-2,3-dicarboxylic acid Chemical compound C1=CC=C2C=C(C(O)=O)C(C(=O)O)=CC2=C1 KHARCSTZAGNHOT-UHFFFAOYSA-N 0.000 description 1
- WPUMVKJOWWJPRK-UHFFFAOYSA-N naphthalene-2,7-dicarboxylic acid Chemical compound C1=CC(C(O)=O)=CC2=CC(C(=O)O)=CC=C21 WPUMVKJOWWJPRK-UHFFFAOYSA-N 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- QGLKJKCYBOYXKC-UHFFFAOYSA-N nonaoxidotritungsten Chemical compound O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1 QGLKJKCYBOYXKC-UHFFFAOYSA-N 0.000 description 1
- OTLDLKLSNZMTTA-UHFFFAOYSA-N octahydro-1h-4,7-methanoindene-1,5-diyldimethanol Chemical compound C1C2C3C(CO)CCC3C1C(CO)C2 OTLDLKLSNZMTTA-UHFFFAOYSA-N 0.000 description 1
- ANISOHQJBAQUQP-UHFFFAOYSA-N octyl prop-2-enoate Chemical compound CCCCCCCCOC(=O)C=C ANISOHQJBAQUQP-UHFFFAOYSA-N 0.000 description 1
- JCGNDDUYTRNOFT-UHFFFAOYSA-N oxolane-2,4-dione Chemical compound O=C1COC(=O)C1 JCGNDDUYTRNOFT-UHFFFAOYSA-N 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- HVAMZGADVCBITI-UHFFFAOYSA-M pent-4-enoate Chemical compound [O-]C(=O)CCC=C HVAMZGADVCBITI-UHFFFAOYSA-M 0.000 description 1
- ULDDEWDFUNBUCM-UHFFFAOYSA-N pentyl prop-2-enoate Chemical compound CCCCCOC(=O)C=C ULDDEWDFUNBUCM-UHFFFAOYSA-N 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 125000004437 phosphorous atom Chemical group 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920000768 polyamine Polymers 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 239000003505 polymerization initiator Substances 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920000166 polytrimethylene carbonate Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- LYBIZMNPXTXVMV-UHFFFAOYSA-N propan-2-yl prop-2-enoate Chemical compound CC(C)OC(=O)C=C LYBIZMNPXTXVMV-UHFFFAOYSA-N 0.000 description 1
- LLHKCFNBLRBOGN-UHFFFAOYSA-N propylene glycol methyl ether acetate Chemical compound COCC(C)OC(C)=O LLHKCFNBLRBOGN-UHFFFAOYSA-N 0.000 description 1
- 238000007763 reverse roll coating Methods 0.000 description 1
- 238000007151 ring opening polymerisation reaction Methods 0.000 description 1
- DCKVNWZUADLDEH-UHFFFAOYSA-N sec-butyl acetate Chemical compound CCC(C)OC(C)=O DCKVNWZUADLDEH-UHFFFAOYSA-N 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- YODZTKMDCQEPHD-UHFFFAOYSA-N thiodiglycol Chemical compound OCCSCCO YODZTKMDCQEPHD-UHFFFAOYSA-N 0.000 description 1
- 150000003609 titanium compounds Chemical class 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 238000004448 titration Methods 0.000 description 1
- 238000005809 transesterification reaction Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 1
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 description 1
- SRPWOOOHEPICQU-UHFFFAOYSA-N trimellitic anhydride Chemical compound OC(=O)C1=CC=C2C(=O)OC(=O)C2=C1 SRPWOOOHEPICQU-UHFFFAOYSA-N 0.000 description 1
- QXJQHYBHAIHNGG-UHFFFAOYSA-N trimethylolethane Chemical compound OCC(C)(CO)CO QXJQHYBHAIHNGG-UHFFFAOYSA-N 0.000 description 1
- 229910001930 tungsten oxide Inorganic materials 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- 238000004383 yellowing Methods 0.000 description 1
- PAPBSGBWRJIAAV-UHFFFAOYSA-N ε-Caprolactone Chemical compound O=C1CCCCCO1 PAPBSGBWRJIAAV-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/043—Improving the adhesiveness of the coatings per se, e.g. forming primers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/26—Esters containing oxygen in addition to the carboxy oxygen
- C08F220/28—Esters containing oxygen in addition to the carboxy oxygen containing no aromatic rings in the alcohol moiety
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
- C08G63/12—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from polycarboxylic acids and polyhydroxy compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
- C08L75/04—Polyurethanes
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2475/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
Definitions
- the present invention relates to laminated polyester films. More particularly, it relates to a laminated polyester film having an easily adhesive coating layer suitable for all fields such as optics, packaging and labels.
- Thermoplastic resin films especially polyester films, have excellent properties such as mechanical properties, electrical properties, dimensional stability, transparency, and chemical resistance. It is widely used for optical films such as anti-reflection films, diffusion sheets, prism sheets, etc., and films for label printing.
- polyester film since polyester film has a highly crystalline surface, it has the disadvantage of poor adhesion to various coating materials such as paints, resins, UV curable resins, inks, etc. in processing for these applications. are doing.
- Patent Document 1 a method of providing a coating layer having easy-adhesion properties on the surface of a polyester film is well known (see Patent Document 1).
- Patent Document 2 a method of providing a coating layer having easy-adhesion properties on the surface of a polyester film is well known (see Patent Document 1).
- the state of the adhesion interface is important, and the effects of molecular entanglement, intermolecular interaction, and chemical bonding are said to be the main factors.
- an intermediate layer composed of mutual resins is provided at the interface to improve adhesion (see Patent Document 2).
- Patent Document 3 Various studies have been conducted to provide a similar composition (see Patent Document 3), and to include a reactive component with the coating material composition in the easy-adhesion layer from the viewpoint of chemical bonding (see Patent Document 4).
- Patent Document 4 Various studies have been conducted to provide a similar composition (see Patent Document 3), and to include a reactive component with the coating material composition in the easy-adhesion layer from the viewpoint of chemical bonding (see Patent Document 4).
- Patent Document 4 Various studies have been conducted to provide a similar composition.
- an object of the present invention is to stably provide a laminated polyester film excellent in general-purpose adhesion to various coating materials.
- the laminated polyester film of the present invention has good adhesion to various paints, resins, UV curable resins, inks, etc., and is particularly excellent in adhesion to UV curable resins that use organic solvents, and has a long life. It is excellent in maintaining high levels of adhesion over time.
- the solubility of the resin forming the coating layer in the solvent of the coating material provided on the coating layer is important.
- hydrocarbon solvents such as toluene and hexane
- ketone solvents such as methyl ethyl ketone and cyclohexanone
- ether solvents such as tetrahydrofuran and propylene glycol methyl ether
- ester solvents such as ethyl acetate and butyl acetate. Therefore, it was difficult to adjust the solubility of the resin in each solvent.
- the present inventors have made various studies and found that the contact angle of a specific solvent can solve the problems of the present invention, and have completed the present invention.
- the present invention consists of the following configurations.
- a laminated polyester film comprising a coating layer on at least one surface of a polyester film substrate, wherein the coating layer is formed from a composition containing a polyester resin, a polyurethane resin and/or an acrylic resin, and the coating layer
- a laminated polyester film having a contact angle (A) of 13 to 25 degrees after 1 second of droplet deposition of 1-bromonaphthalene and a contact angle (B) of 9 to 20 degrees after 5 seconds of droplet deposition.
- the difference (AB) between the contact angle (A) after 1 second of droplet deposition and the contact angle (B) of 5 seconds after droplet deposition of 1-bromonaphthalene on the coating layer is 4 to 7 degrees.
- the laminated polyester film as described.
- the laminated polyester film of the present invention is excellent in the transparency and adhesiveness of the coating film, especially the adhesiveness to solvent-based coating materials, it can be applied to UV-curable resins, UV-curable inks, or heat-treated hard coat films for optical use or construction materials. It is suitably used as a substrate film for curable resins, solvent-drying inks, and the like.
- polyester film substrate The polyester resin constituting the polyester film substrate in the present invention includes polyethylene terephthalate, polybutylene terephthalate, polyethylene-2,6-naphthalate, polytrimethylene terephthalate, and the like, as well as the diol component or dicarboxylic acid component of the polyester resin as described above.
- copolymerized polyester resin in which a part of is replaced with the following copolymerization components, for example, as copolymerization components, diol components such as diethylene glycol, neopentyl glycol, 1,4-cyclohexanedimethanol, polyalkylene glycol , adipic acid, sebacic acid, phthalic acid, isophthalic acid, 5-sodium isophthalic acid, and dicarboxylic acid components such as 2,6-naphthalenedicarboxylic acid.
- diol components such as diethylene glycol, neopentyl glycol, 1,4-cyclohexanedimethanol, polyalkylene glycol , adipic acid, sebacic acid, phthalic acid, isophthalic acid, 5-sodium isophthalic acid, and dicarboxylic acid components such as 2,6-naphthalenedicarboxylic acid.
- the polyester resin suitably used for the polyester film substrate in the present invention is mainly selected from polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate and polyethylene-2,6-naphthalate.
- polyethylene terephthalate is most preferable from the viewpoint of balance between physical properties and cost.
- the polyester film substrate composed of these polyester resins is preferably a biaxially oriented polyester film, which can improve chemical resistance, heat resistance, mechanical strength, and the like.
- the catalyst for polycondensation used in the production of polyester resin is not particularly limited, but antimony trioxide is suitable because it is inexpensive and has excellent catalytic activity. It is also preferable to use a germanium compound or a titanium compound. Further preferred polycondensation catalysts include catalysts containing aluminum and/or compounds thereof and phenolic compounds, catalysts containing aluminum and/or compounds thereof and phosphorus compounds, and catalysts containing aluminum salts of phosphorus compounds.
- the polyester film substrate in the present invention is not particularly limited in its layer structure, and may be a single-layer polyester film or a two-layer structure having mutually different components. It may be a polyester film substrate consisting of at least three layers.
- the inventor of the present invention conducted various studies on solvent species for measuring the contact angle as described above. Especially for contact angle measurement, the generation of droplets at the tip of the syringe needle, the adhesion to the measurement surface, and the stability of the solvent during measurement are important. 48) Therefore, 1-bromonaphthalene, which can ignore vaporization during measurement, is selected because droplets are easily generated at the tip of the syringe and adhere to the measurement surface, and because it has a relatively high boiling point (282 ° C). bottom.
- the laminated polyester film of the present invention contains a polyester resin, a polyurethane resin and/or an acrylic resin on at least one side in order to improve the transparency and adhesiveness of the coating film, particularly the adhesiveness to a solvent-based coating material. and the contact angle (A) of 1-bromonaphthalene on the coating layer after 1 second of droplet deposition is 13 to 25 degrees and the contact angle (B) of 5 seconds after droplet deposition is 9 to 20 degrees. is preferred.
- the coating layer may be provided on both sides of the polyester film, or depending on the application, it may be provided only on one side of the polyester film and a different resin coating layer may be provided on the other side.
- the contact angle of the 1-bromonaphthalene droplet on the coating layer and the change in the contact angle over time are important.
- the contact angle (A) of a droplet of 1-bromonaphthalene after 1 second is in the range of 13 to 25 degrees, which gives the coated layer surface optimum affinity, solvent resistance or permeability to certain solvents. Since an intermediate layer composed of mutual resins is formed at the interface between the coating material and the coating layer, it is preferable from the viewpoint of adhesion, and the range of 14 to 21 degrees is more preferable.
- the contact angle (B) of a droplet of 1-bromonaphthalene after 5 seconds of deposition indicates that the coating layer surface has optimal solvent resistance or permeability to a certain solvent, and the coating layer's excessiveness It is preferably in the range of 9 to 20 degrees, more preferably in the range of 10 to 17 degrees, from the viewpoint of adhesion from the point of suppressing the influence of adhesiveness on the interface between the coating layer and the substrate due to dissolution.
- the difference (AB) between the contact angle (A) after 1 second of droplet deposition and the contact angle (B) after 5 seconds of droplet deposition is the difference (A - B) between the interface between the coating material and the coating layer. From the point that the optimum intermediate layer thickness is configured, it is preferably in the range of 4 to 7 degrees from the viewpoint of good adhesion and durability, and more preferably in the range of 4.5 to 6 degrees. .
- the coating layer in the present invention is preferably formed containing a composition containing a polyester resin and a polyurethane resin and/or an acrylic resin.
- the content of polyester resin, polyurethane resin and/or acrylic resin is preferably 70% by mass or more, more preferably 75% by mass or more, and still more preferably 80% by mass with respect to the entire coating layer. That's it. It is preferable that the aforementioned resin accounts for 70% by mass or more in the entire coating layer, because adhesion, adhesiveness, etc. can be effectively obtained.
- resins other than the polyester resin, polyurethane resin, and acrylic resin described above may be used in combination, and it is particularly preferable to use a cross-linking agent in combination. By using a cross-linking agent in combination, it is possible to further improve the durability of the present invention.
- the coating layer in the present invention preferably adjusts the contact angle of droplets of 1-bromonaphthalene to a specific range. / Or it can be adjusted by the compounding ratio of each resin.
- the content of the polyester resin is preferably 50% by mass or more and 90% by mass or less from the viewpoint of adhesion, and 53% by mass or more and 70% by mass.
- the content is more preferably 57% by mass or less and 67% by mass or less.
- the content of the polyurethane resin is preferably 47% by mass or less, more preferably 45% by mass or less, and even more preferably 43% by mass or less.
- the acrylic resin content is preferably less than 40% by mass, more preferably 37.5% by mass or less, and even more preferably 35% by mass or less.
- these polyurethane resins and/or acrylic resins are not simply blended, but are indirectly blended by being absorbed by additives such as lubricants.
- additives such as lubricants.
- the same effect can be obtained even if the content is less than the above-mentioned content, so the upper limit of the content of the polyester resin can be 97% by mass.
- the contact angle of 1-bromonaphthalene droplets tends to increase due to the presence of aromatic and hydrophilic components, and the contact angle tends to decrease due to the presence of aliphatic components. Further, among resin species, the acrylic resin skeleton generally tends to have a higher contact angle than the polyester resin skeleton and the polyurethane resin skeleton.
- An example for adjusting the range of the contact angle of the droplet of 1-bromonaphthalene in the present invention is as follows. First, a polyester resin to be used for the coating layer is selected, and the contact angle is measured after one second when the polyester resin is used as the coating layer. If the numerical value is higher than specified, the numerical value is lowered by using polyurethane resin together.
- the numerical value is low, the numerical value is increased by using acrylic resin together, and the contact angle after 1 second is adjusted within the specified range. Next, the contact angle of the adjusted composition after 5 seconds is confirmed. If the contact angle after 5 seconds is low, the amount of resin used is adjusted again so as to increase the contact angle after 1 second. Even if the contact angle after 1 second is adjusted to be high, if the contact angle after 5 seconds is low, a cross-linking agent is used in combination and adjustment is carried out again. Also, when using other resins and additives than the main resin and cross-linking agent, it is necessary to make final adjustments according to the above. However, in the present invention, it is important to define the contact angle of the droplet of 1-bromonaphthalene, and the above method is merely an example of adjusting the contact angle, and other adjusting methods are not denied.
- polyester resin A polyester resin can usually be obtained from a dicarboxylic acid and a diol.
- dicarboxylic acids include aliphatic dicarboxylic acids such as succinic acid, glutaric acid, adipic acid, trimethyladipic acid, pimelic acid, 2,2-dimethylglutaric acid, azelaic acid, sebacic acid, fumaric acid, maleic acid and itaconic acid.
- naphthalenedicarboxylic acids such as 2,7-naphthalenedicarboxylic acid, 1,3-cyclopentanedicarboxylic acid, 1,2-cyclohexanedicarboxylic acid, 1,3-cyclopentanedicarboxylic acid, 1,4- Alicyclic dicarboxylic acids such as cyclohexanedicarboxylic acid and 2,5-norbornanedicarboxylic acid, and trivalent or higher polycarboxylic acids include, for example, trimellitic acid, pyromellitic acid, adamantanetricarboxylic acid, and
- diols examples include ethylene glycol, diethylene glycol, triethylene glycol, 1,3-propanediol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, 1,9-nonanediol, and the like.
- the solvent for the polyester resin used when forming the coating layer in the present invention is not particularly limited. However, from the viewpoint of working environment, it is preferable to mainly use water as the solvent.
- water When water is mainly used as the solvent for the polyester resin, it is preferably an aqueous dispersion from the viewpoint of the water resistance of the coating layer.
- a hydrophilic surfactant In order to disperse the polyester resin in water, there are a method of using a hydrophilic surfactant and a method of introducing a hydrophilic group into the resin.
- a surfactant When a surfactant is used, it can be prepared by previously dissolving the polyester resin in an organic solvent and dispersing it in water in the presence of the surfactant. The organic solvent used can be removed by vacuum distillation. If the amount of organic solvent used is small, it may be used as it remains in the system.
- hydrophilic groups such as polyoxyalkyl groups such as polyethylene glycol, hydroxyl groups, carboxyl groups, sulfonic acid, phosphonic acid, and phosphinic acid groups can be used as hydrophilic groups.
- polyoxyalkyl groups such as polyethylene glycol, hydroxyl groups, carboxyl groups, sulfonic acid, phosphonic acid, and phosphinic acid groups
- hydrophilic groups polyethylene glycol groups, carboxyl groups, and sulfonic acid groups are preferably used.
- a polyester resin having a polyethylene glycol group can be easily obtained by using a dicarboxylic acid or diol having a polyethylene glycol group.
- a polyester-based resin having a carboxyl group can be easily obtained by including the above-mentioned dicarboxylic acid in excess. However, in that case, the carboxyl groups are introduced at the ends of the molecules, so simply increasing the amount of carboxyl groups introduced reduces the molecular weight. In order to avoid this, an appropriate amount of tri- or more functional polycarboxylic acid or polyol can be used to provide a branched structure. It is preferable to introduce a carboxyl group into the molecule by allowing the
- the polyvalent carboxylic anhydride is a compound having at least trivalent or higher carboxyl groups, and these carboxyl groups have at least one carboxylic anhydride structure.
- the carboxyl group in the polyester resin preferably has an acid value in the range of 10 to 60 mgKOH/g, more preferably 15 to 50 mgKOH/g.
- An acid value of 10 mgKOH/g or more is preferable from the viewpoint of increasing the water dispersibility of the polyester resin and the contact angle in the present invention, and an acid value of 60 mgKOH/g or less is preferable from the viewpoint of moist heat resistance.
- these carboxyl groups form a salt with a tertiary amine compound such as triethylamine.
- a tertiary amine compound such as triethylamine.
- a polyester resin having a sulfonic acid group can be easily obtained by using a sulfonic acid group-containing dicarboxylic acid as a dicarboxylic acid component.
- sulfonic acid group-containing dicarboxylic acids include sulfoterephthalic acid, 5-sulfoisophthalic acid, and 5-sodium sulfoisophthalic acid.
- the sulfonic acid group in the polyester resin is preferably used in an amount of 1 to 10 mol % in the dicarboxylic acid component.
- a sulfonic acid group content of 1 mol % or more is preferable from the viewpoint of increasing the water dispersibility of the polyester resin and a contact angle in the present invention, and a sulfonic acid group content of 10 mol % or less is preferable from the viewpoint of moist heat resistance.
- hydrophilic groups or other hydrophilic groups may be used in combination as long as they do not impair the effects of the present invention.
- the contact angle of 1-bromonaphthalene can be increased by increasing the proportion of hydrophilic components such as polyethylene glycol groups, carboxyl groups, sulfonic acid groups, and hydroxyl groups.
- the contact angle can be lowered by increasing the proportion of dicarboxylic acid or aliphatic diol.
- the contact angle can be lowered.
- the proportion of the hydrophilic component is increased, the glass transition point (Tg) of the resin or the molecular weight thereof will be lowered, which will adversely affect performance such as handleability and adhesion. ) is preferably 20° C.
- the reduced viscosity as a measure of the molecular weight is preferably 0.30 dL/g, and the glass transition point (Tg) is preferably 30° C. or higher and the reduced viscosity is 0.40 dL/g.
- polyurethane resin is a urethane resin derived from at least a polyol component and a polyisocyanate component, and optionally a chain extender.
- Polyol components include polyether polyols such as polyethylene glycol, polypropylene glycol, and polytetramethylene glycol; aliphatic polyesters containing adipic acid as acid components; aromatic polyesters containing terephthalic acid, etc.; Polyester polyols typified by lactone-based polyesters obtained by ring-opening polymerization such as cyclic polyesters and ⁇ -caprolactone, carbonate polyols typified by polymers of 1,6-hexanediol and ethylene carbonate, acrylic copolymers Examples include acrylic polyols having hydroxyl groups introduced therein, butadiene having hydroxyl groups at the ends and polybutadiene polyols which are copolymers thereof. Among these, polyether polyols, polyester polyols, carbonate polyols and acrylic polyols are preferable, and carbonate polyols and acrylic polyols are particularly preferable from the viewpoint of durability.
- the number average molecular weight of the polyol in the present invention is preferably 300-5000. More preferably 400-4000, most preferably 500-3000. When it is 300 or more, the adhesiveness can be improved, which is preferable. When it is 5000 or less, durability such as resistance to moist heat can be improved, which is preferable.
- polyisocyanates used in polyurethane resins include aromatic-aliphatic diisocyanates such as xylylene diisocyanate, isophorone diisocyanate and alicyclic diisocyanates such as 4,4-dicyclohexylmethane diisocyanate and 1,3-bis(isocyanatomethyl)cyclohexane.
- Aliphatic diisocyanates such as hexamethylene diisocyanate and 2,2,4-trimethylhexamethylene diisocyanate, or modified polyisocyanates containing isocyanurate bonds, biuret bonds or allophanate bonds produced from diisocyanates, diisocyanates Polyisocyanates previously added with trimethylolpropane or the like singly or in multiples can be mentioned.
- aromatic-aliphatic diisocyanates, alicyclic diisocyanates, or aliphatic diisocyanates are used, there is no problem of yellowing, which is preferable.
- chain extenders examples include diols such as ethylene glycol, diethylene glycol, 1,4-butanediol, neopentyl glycol and 1,6-hexanediol, polyhydric alcohols such as glycerin, trimethylolpropane, and pentaerythritol, and ethylenediamine. , hexamethylenediamine, and piperazine, amino alcohols such as monoethanolamine and diethanolamine, thiodiglycols such as thiodiethylene glycol, and water.
- polyols or polyamines such as glycerin, trimethylolpropane, pentaerythritol, etc. having three or more functional groups may be used in small amounts.
- the polyester resin described above it is preferable to mainly use water as the solvent from the viewpoint of the working environment.
- water is mainly used as the solvent
- an aqueous dispersion is preferred from the viewpoint of the water resistance of the coating layer.
- a surfactant it can be prepared in the same manner as the polyester resin described above.
- hydrophilic groups such as polyoxyalkyl groups such as polyethylene glycol, hydroxyl groups, carboxyl groups, sulfonic acid, phosphonic acid, and phosphinic acid groups can be used as hydrophilic groups.
- a polyethylene glycol group and a carboxyl group are preferably used as these hydrophilic groups.
- polyethylene glycol groups In order to introduce polyethylene glycol groups into polyurethane resins, it is possible to easily introduce them into the main chain by using polyethylene glycol as the aforementioned polyol. Moreover, it is also possible to introduce it into a side chain by terminally blocking the isocyanate group with a monool such as polyethylene glycol monoalkyl ether instead of a polyol.
- a polyurethane resin having a carboxyl group can be preferably obtained mainly by using a carboxyl group-containing polyol component as a urethane component.
- carboxyl group-containing polyol components include the following. Relatively high molecular weight polyalkylene glycols, carboxyl group-containing acrylic polyols, carboxyl group-containing polyolefin polyols, and carboxyl group-containing polyester polyols can be used. In addition, relatively low molecular weight compounds such as 2,2-dimethylolpropionic acid, 2,2-dimethylolbutanoic acid, 2,2-dimethylolbutyric acid, 2,2-dimethylolvaleric acid and the like can be used. . For carboxyl group introduction, 2,2-dimethylolpropionic acid and 2,2-dimethylolbutanoic acid are particularly preferably used.
- the polyurethane resin having a carboxyl group preferably has an acid value in the range of 10 to 60 mgKOH/g, more preferably 15 to 50 mgKOH/g.
- An acid value of 10 mgKOH/g or more is preferable from the viewpoint of the stability of the aqueous dispersion of the polyurethane resin, and an acid value of 60 mgKOH/g or less is preferable from the viewpoint of moist heat resistance.
- other hydrophilic groups such as hydroxyl group, ether, sulfonic acid, phosphonic acid, etc. may be introduced in order to supplement the water solubility or water dispersibility of the polyurethane resin within the range that does not impair the effects of the present invention. may
- the carboxyl groups in these polyurethanes form a salt with an amine compound.
- the carboxyl group forms a salt, the hydrophilicity of the polyurethane resin is improved, thereby improving the stability of the aqueous dispersion.
- the polyurethane resin in the present invention may have a reactive group such as blocked isocyanate at the end or side chain for improving toughness.
- the contact angle of 1-bromonaphthalene can be increased by increasing the proportion of hydrophilic components such as polyethylene glycol groups, carboxyl groups, sulfonic acid groups, and hydroxyl groups.
- the contact angle can be lowered by increasing the proportion of polyester polyol acid or aliphatic polycarbonate polyol.
- the contact angle can be lowered by using a diol or the like having a branched structure as the chain extender.
- the proportion of the hydrophilic component is increased, the blocking resistance or moist heat resistance of the coating layer tends to decrease as a polyurethane resin, so it is necessary to pay attention to the composition and amount of the polyester resin or cross-linking agent used in combination.
- the acrylic resin in the present invention is a copolymer mainly formed from acrylic acid, methacrylic acid or their esters.
- Various compounds can be used as acrylic acid or methacrylic acid esters.
- water As with the polyurethane resin described above, it is preferable to mainly use water as the solvent from the viewpoint of the working environment.
- water When water is mainly used as the solvent, an aqueous dispersion is preferred from the viewpoint of the water resistance of the coating layer.
- hydrophilic groups such as polyoxyalkyl groups such as polyethylene glycol, hydroxyl groups, carboxyl groups, sulfonic acid, phosphonic acid, and phosphinic acid groups can be used as hydrophilic groups.
- a polyethylene glycol group and a carboxyl group are preferably used as these hydrophilic groups.
- Nitriles such as acrylic acid esters or methacrylic acid esters, acrylic acid or methacrylic acid amides, acrylonitrile or methacrylonitrile into which a hydroxyl group, an ether group, a sulfonic acid group, etc. are introduced, as long as they do not impair the effects of the present invention.
- styrene and ⁇ -methylstyrene vinyls such as vinyl acetate and vinyl propionate
- allyls such as allyl acetate and allyl propionate.
- use of nitriles such as acrylic acid or methacrylic acid amide, acrylonitrile or methacrylonitrile is useful from the viewpoint of imparting hydrophilicity to the resin.
- the acrylic resin having a carboxyl group of the present invention preferably has an acid value in the range of 10 to 60 mgKOH/g, more preferably in the range of 15 to 50 mgKOH/g.
- the acid value is 10 mgKOH/g or more, it is preferable from the viewpoint of suppressing the occurrence of coating film defects or coating film unevenness, which is the effect of the present invention. preferable.
- the carboxyl group of the acrylic resin can be imparted by using acrylic acid or methacrylic acid, but unsaturated carboxylic acids such as maleic acid and itaconic acid can also be used.
- the carboxyl group of the acrylic resin also form a salt with an amine compound as described above.
- the salt formation of the carboxyl group is preferable because the hydrophilicity as the acrylic resin is good and the stability of the aqueous dispersion is enhanced.
- the contact angle of 1-bromonaphthalene can be increased by increasing the proportion of hydrophilic components such as polyethylene glycol groups, carboxyl groups, sulfonic acid groups, hydroxyl groups, amides, and nitriles.
- hydrophilic components such as polyethylene glycol groups, carboxyl groups, sulfonic acid groups, hydroxyl groups, amides, and nitriles.
- the proportion of the hydrophilic component is increased, the acrylic resin tends to lower the blocking resistance or moist heat resistance of the coating layer, so it is necessary to pay attention to the composition and amount of the polyester resin or cross-linking agent used in combination.
- polyester resin polyurethane resin
- acrylic resin examples include polyester resins, polyurethane resins, acrylic resins, vinyl acetate, polyvinyl alcohol, hydroxycellulose, etc. that do not have a carboxyl group other than those mentioned above.
- solvent for the coating material in the present invention
- the following can be used.
- crosslinking agent In the present invention, it is desirable to use a cross-linking agent in combination with the aforementioned resin in the coating layer. By using a cross-linking agent together, it is possible to increase the contact angle of the coating layer. In addition, the contact angle can be further increased by incorporating the aforementioned hydrophilic component into the cross-linking agent.
- the type of cross-linking agent is not particularly limited, and isocyanate-based, oxazoline-based, carbodiimide-based, epoxy-based, melamine-based, and the like can be used.
- the amount of the cross-linking agent used is preferably less than 50% by mass based on the total amount of the resin and the cross-linking agent. Since the cross-linking agent has the effect of increasing the numerical value of the contact angle in the present invention, if the amount of the cross-linking agent is less than 50% by mass, the numerical value of the contact angle can easily be adjusted to the preferred range in the present invention, and from the viewpoint of adhesion etc. preferable.
- the content of the cross-linking agent is more preferably 45% by mass or less, particularly preferably 40% by mass or less.
- additives such as surfactants, antioxidants, heat stabilizers, weather stabilizers, ultraviolet absorbers, organic or inorganic lubricants, may be added to the coating layer in the present invention as long as they do not impair the effects of the present invention.
- pigments, dyes, organic or inorganic particles, antistatic agents and the like may be added.
- particles to be contained in the coating layer in the present invention include, for example, titanium oxide, barium sulfate, calcium carbonate, calcium sulfate, silica, alumina, talc, kaolin, clay, and mixtures thereof.
- Inorganic particles such as calcium phosphate, mica, hectorite, zirconia, tungsten oxide, lithium fluoride, calcium fluoride, etc., and organic particles such as styrene, acrylic, melamine, benzoguanamine, and silicone Examples include polymer-based particles.
- the present invention in order to prevent aggregation of the particles to be used, it is possible to treat the particles to be used in advance with a resin having a polar group such as a carboxyl group such as a polyester resin, a polyurethane resin, or an acrylic resin.
- the resin to be used is not particularly limited, but in the present invention, it is preferable to treat it with polyurethane resin, acrylic resin, or the like. Due to this treatment, these resins are efficiently distributed in the coating layer mainly composed of polyester resin, and the effect of the present invention can be easily achieved with a smaller amount of these resins than described above.
- the treatment method is not particularly limited, and includes a method of previously mixing particles and a resin in an organic solvent and then dispersing the mixture in water, a method of mixing resin with water-dispersed particles, and a method of previously mixing particles and a monomer and then polymerizing the mixture. mentioned
- the average particle size of the particles in the coating layer is preferably 0.04 to 2.0 ⁇ m, more preferably 0.1 to 1.0 ⁇ m. is.
- the average particle size of the inert particles is 0.04 ⁇ m or more, it becomes easy to form unevenness on the film surface, so that the handling properties such as the slipperiness and windability of the film are improved, and the film can be easily laminated. It is preferable because of its good workability.
- the average particle size of the inert particles is 2.0 ⁇ m or less, the particles are less likely to fall off, which is preferable.
- the particle concentration in the coating layer is preferably 1 to 20 mass % of the solid component.
- the average particle diameter of the particles was measured by observing the particles in the cross section of the laminated polyester film with a scanning electron microscope, observing 30 particles, and taking the average value as the average particle diameter.
- the shape of the particles is not particularly limited as long as it satisfies the object of the present invention, and spherical particles and irregularly shaped non-spherical particles can be used.
- the particle diameter of amorphous particles can be calculated as the equivalent circle diameter.
- the circle-equivalent diameter is a value obtained by dividing the observed particle area by ⁇ , calculating the square root, and doubling the result.
- PET film base material a polyethylene terephthalate (hereinafter sometimes abbreviated as PET) film base material, but it is of course not limited to this.
- the unstretched PET sheet may have a single-layer structure or a multi-layer structure obtained by a coextrusion method.
- the obtained unstretched PET sheet is uniaxially stretched or biaxially stretched for crystal orientation.
- biaxial stretching after stretching 2.5 to 5.0 times in the longitudinal direction with a roll heated to 80 to 120 ° C. to obtain a uniaxially stretched PET film, the end of the film is held with a clip. Then, it is led to a hot air zone heated to 80 to 180° C. and stretched 2.5 to 5.0 times in the width direction.
- uniaxial stretching the film is stretched 2.5 to 5.0 times in a tenter. After stretching, the film is led to a heat treatment zone and heat treated to complete the crystal orientation.
- the lower limit of the temperature of the heat treatment zone is preferably 170°C, more preferably 180°C.
- the curing is sufficient, the anti-blocking property in a high-humidity environment is favorable, and it is preferable because the storage environment and the like can be easily adjusted.
- the upper temperature limit of the heat treatment zone is preferably 260°C, more preferably 250°C. When the temperature of the heat treatment zone is 250° C. or less, it is preferable because the physical properties of the film do not deteriorate.
- the coating layer can be provided after the film is manufactured or during the manufacturing process.
- any known method can be used to apply this coating liquid to the PET film.
- reverse roll coating method gravure coating method, kiss coating method, die coater method, roll brush method, spray coating method, air knife coating method, wire bar coating method, pipe doctor method, impregnation coating method, curtain coating method, etc. be done. These methods can be applied singly or in combination.
- the thickness of the coating layer can be appropriately set in the range of 0.001 to 2.00 ⁇ m, but the range of 0.01 to 1.00 ⁇ m is preferable in order to achieve both workability and adhesiveness. It is more preferably 0.02 to 0.80 ⁇ m, still more preferably 0.05 to 0.50 ⁇ m. It is preferable that the thickness of the coating layer is 0.001 ⁇ m or more because the adhesiveness is good. When the thickness of the coating layer is 2.00 ⁇ m or less, blocking is less likely to occur, which is preferable.
- the upper limit of haze of the laminated polyester film of the present invention is preferably 2.5%, more preferably 2.0%, even more preferably 1.5%, and particularly preferably 1.2%.
- a haze of 2.5% or less is preferable in terms of transparency, and can be suitably used for optical films that require transparency. The smaller the haze, the better, but it is preferably 0.1% or more, and preferably 0.3% or more.
- Acid value The acid value of the resin and cross-linking agent was measured by the titration method described in JIS K-1557-5. However, in the case of a carboxyl group neutralized with an amine or the like, the amine or the like was removed by high-temperature treatment, or the amine or the like was previously treated with hydrochloric acid or the like to liberate and remove the amine or the like before measurement. If the resin to be measured had poor solubility in the solvent isopropanol, N-methylpyrrolidone was used instead. In any of the above treatments, comparison measurements were sufficiently carried out.
- the hard coat coating agent (HC-A) described below was applied using a #5 wire bar and dried at 80°C for 1 minute. . Then, the coated film was irradiated with ultraviolet rays of 100 mJ/cm 2 using a high-pressure mercury lamp to obtain a hard coat film (a). Next, using a cutter guide with a clearance of 2 mm, 100 grid-like cuts that penetrate the hard coat layer and reach the film substrate are made on the surface of the hard coat layer. Next, a cellophane adhesive tape (No. 405, 24 mm width, manufactured by Nichiban Co., Ltd.) is attached to the square-shaped cut surface and adhered firmly.
- HC-A hard coat coating agent
- Adhesion (A) (%) 100 - (number of peeled squares) Adhesion was judged according to the following criteria. ⁇ : 100%, ⁇ : 96 to 99%, ⁇ : 80 to 95%, ⁇ : less than 80%. As a standard, 0 or more was regarded as a pass.
- each hard coat film (a) to (E) ) was made.
- the adhesion of each of the hard coat films (a) to (d) was evaluated in the same manner as the hard coat film (a) and designated as each of the adhesions (a) to (d).
- a hard coating agent (HC-d) was prepared from the hard coating agent (HC-a) in the same manner as described above, except that the type of solvent was changed.
- Solvent a: toluene/methyl ethyl ketone 50/50 (mass ratio)
- Solvent A: toluene/ethyl acetate 25/75 (mass ratio)
- Solvent c: methyl ethyl ketone 100 (mass ratio)
- the obtained copolymer polyester resin (PES-1) was a pale yellow transparent solid, and had a reduced viscosity of 0.60 dL/g, a glass transition point (Tg) of 61° C., and an acid value of 0.60 dL/g. 8 mg KOH/g.
- Copolyester PES-2 to PES-5 having the following compositions were obtained in the same manner as the copolymer polyester resin PES-1.
- Reduced viscosity 0.49 dL/g, glass transition point (Tg): 69°C, acid value: 1.0 mgKOH/g.
- Reduced viscosity 0.53 dL/g, glass transition point (Tg): 37°C, acid value was 0.6 mgKOH/g.
- This dispersion was then distilled under a reduced pressure of 2.5 kPa to remove tetrahydrofuran, and the liquid was cooled to room temperature while stirring. An appropriate amount of water was added to prepare an aqueous dispersion (PES-2WD) of a copolymer polyester resin PES-2 having a resin solid content of 30% by mass.
- copolymer polyester resin PES-3 an aqueous dispersion (PES-3WD) was prepared in the same manner as for the copolymer polyester resin PES-2. Furthermore, the copolymer polyester resins PES-4 and PES-5 were prepared into water dispersions (PES-4WD) and water dispersions (PES-5WD) in the same manner as the copolymer polyester resin PES-1.
- Polymerization of polyurethane resin PU-1) 58.0 parts by mass of dicyclohexylmethane 4,4′-diisocyanate and a polycarbonate diol having a number average molecular weight of 800 were placed in a four-necked flask equipped with a stirrer, a Dimroth condenser, a nitrogen inlet tube, a silica gel drying tube, and a thermometer. 90.8 parts by mass of (1,6-hexanediol type) and 244 parts by mass of ethyl methyl ketone as a solvent were charged, and stirred at 75° C. for 1 hour under a nitrogen atmosphere.
- Polymerization of polyurethane resin PU-2) 54.06 parts by mass of dicyclohexylmethane 4,4'-diisocyanate and 20.0 parts of dimethylolpropionic acid were placed in a four-necked flask equipped with a stirrer, a Dimroth condenser, a nitrogen inlet tube, a silica gel drying tube, and a thermometer. Parts by mass, 126.0 parts by mass of a polycarbonate diol (1,6-hexanediol type) having a number average molecular weight of 2000, and 224 parts by mass of ethyl methyl ketone as a solvent are added, and stirred at 75° C.
- Polyurethane resin (PU-6) was prepared from polyurethane resin (PU-3) having the following composition (mass ratio) and an acid value solid content of 45.0% by mass in the same manner as in the polymerization of polyurethane resin (PU-2) described above. polymerized.
- Polyurethane resin (PU-3): (Cyclohexane-1,2-diylbismethylene) diisocyanate/polycarbonate diol having a number average molecular weight of 1000 (1,6-hexanediol type)/dimethylolpropionic acid/1,6-hexanediol 26.0/64.
- Acid value 25.9mgKOH/g
- PU-1WD aqueous dispersion of polyurethane resin (PU-1)
- PU-1WD aqueous dispersion of polyurethane resin (PU-1)
- PU-1WD aqueous dispersion of polyurethane resin (PU-1)
- a predetermined amount of water is added to a reaction vessel equipped with a homodisper capable of high-speed stirring, the temperature is adjusted to 25° C., and the polyurethane resin (PU-2) is stirred and mixed at 2000 min ⁇ 1 .
- a milky white dispersion was obtained by adding a neutralizing solution and dispersing in water. After that, ethyl methyl ketone as a solvent was removed under a reduced pressure of 2.5 kPa.
- An aqueous dispersion (PU-2WD) of a polyurethane resin (PU-2) having a solid content of 35% by mass was prepared by adjusting the concentration with water.
- aqueous dispersions (PU-3WD) to (PU-5WD) of polyurethane resins (PU-3) to (PU-5))
- An aqueous dispersion was prepared in the same manner as the aqueous dispersion (PU-2WD) of the polyurethane resin (PU-2) described above.
- triethylamine was used instead of triethanolamine, and the amount of triethylamine added was adjusted according to the acid value of each polyurethane resin.
- aqueous dispersion (A-1WD) of acrylic resin (A-1) To a predetermined amount of the acrylic resin (A-1) solution described above, 1.5% by mass of sodium alkyldiphenyl ether disulfonate based on the acrylic resin (A-1) is added at room temperature, and the mixture is stirred for 30 minutes to obtain the acrylic resin (A-1). A mixed solution of -1) was prepared. Next, a predetermined amount of water is added to a reaction vessel equipped with a homodisper capable of high-speed stirring, the temperature is adjusted to 25° C., and the acrylic resin (A-1) described above is stirred and mixed at 2000 min ⁇ 1 . The mixed solution was added and dispersed in water. An aqueous dispersion (A-1WD) of acrylic resin (A-1) having a resin solid content of 30% by mass was prepared by adjusting the concentration with water.
- aqueous dispersion (A-2WD) of acrylic resin (A-2) A predetermined amount of water was added to a reaction vessel equipped with a homodisper capable of high-speed stirring, the temperature was adjusted to 25° C., and the acrylic resin (A-2) solution described above was added in place while stirring and mixing at 2000 min ⁇ 1 . A fixed amount was added and dispersed in water.
- An aqueous dispersion (A-2WD) of acrylic resin (A-2) having a resin solid content of 30% by mass was prepared by adjusting the concentration with water.
- aqueous dispersion (A-3WD) of acrylic resin (A-3) To the acrylic resin (A-3) solution described above, 1.05 equivalents of triethylamine relative to the acid value of the resin was added at room temperature, and the mixture was stirred for 30 minutes to prepare a mixed solution of the acrylic resin (A-3). Then, a predetermined amount of water was added to a reaction vessel equipped with a homodisper capable of high-speed stirring, and the mixed solution of the acrylic resin (A-3) was added while stirring and mixing at 25° C. and 2000 min ⁇ 1 . and dispersed in water. An aqueous dispersion (A-3WD) of acrylic resin (A-3) having a solid content of 30% by mass was prepared by adjusting the concentration with water.
- Solid content 70.0 which is a resin composition ratio of 41 mol% methyl methacrylate, 47 mol% ethyl acrylate, 8 mol% acrylonitrile, and 4 mol% N-methylolacrylamide, by the same process as for the acrylic resin (A-1).
- a solution of acrylic resin (A-4) of % by mass was obtained.
- the solid content acid value of this acrylic resin (A-4) solution was 0.2 mgKOH/g.
- this reaction liquid was cooled to room temperature or lower, and 16.2 parts by mass of triethylamine was added dropwise to the mixture. Further, a predetermined amount of water was added to this mixture to prepare a blocked isocyanate-based cross-linking agent (C-1) solution having a solid content of 40.0% by mass.
- C-1 blocked isocyanate-based cross-linking agent
- a polymerization initiator solution consisting of 0 parts by mass of a monomer mixture, 5.0 parts by mass of 2,2'-azobis(2-amidinopropane) dihydrochloride and 50.0 parts by mass of water was added from a dropping funnel under a nitrogen atmosphere. Then, while maintaining the inside of the flask at 80° C., the solution was added dropwise over 2 hours. After completion of dropping, the mixture was stirred at 80°C for 5 hours and then cooled to room temperature. An appropriate amount of water was added to prepare a solution of oxazoline-based cross-linking agent (C-2) having a solid content of 40% by mass.
- C-2 oxazoline-based cross-linking agent
- particle P-1 colloidal silica (Snowtex O; manufactured by Nissan Chemical Industries, Ltd.) having a solid content concentration of 20% by mass and an average particle diameter of 10 to 15 nm was used as it was as a particle (P-1) solution.
- colloidal silica Snowtex O; manufactured by Nissan Chemical Industries, Ltd.
- P-2 As particles (P-2), colloidal silica (Seahoster KE-W50; Nippon Shokubai Co., Ltd.) having a solid content concentration of 20% by mass and an average particle diameter of 500 nm was used as it was as a particle (P-2) solution.
- colloidal silica Seahoster KE-W50; Nippon Shokubai Co., Ltd.
- P-3 As particles (P-3), zirconia oxide particles (ZSL00014; Daiichi Kigenso Kagaku Kogyo Co., Ltd.) with a solid content concentration of 20% by mass and an average particle size of 10 to 20 nm were used as they were as a particle (P-3) solution. .
- polyester resin (E-2) for base material) (Preparation example of aluminum compound solution)
- a flask was charged with an equal amount (volume ratio) of ethylene glycol to a 20 g/L aqueous solution of basic aluminum acetate (hydroxyaluminum diacetate; manufactured by Sigma-Aldrich Japan G.K.). Water was distilled off from the system while stirring at 70 to 90° C. for several hours under 133 Pa) to prepare an ethylene glycol solution of 20 g/L aluminum compound.
- polyester resin (E-2) for base material
- the antimony trioxide solution as the polycondensation catalyst
- a mixture of the aluminum compound solution and the phosphorus compound solution described above was used to obtain 0.014 mol % and Polymerization was carried out in the same manner as polyester resin E-1, except that it was added in an amount of 0.028 mol %.
- the polymerization time was set to 68 minutes, a polyester resin (E-2) having an intrinsic viscosity (IV) of 0.61 dL/g and containing substantially no particles was obtained.
- Example 1 (1) Preparation of Coating Liquid (No. 1) A mixed solvent of water and isopropanol (80/20 parts by mass ratio) was mixed with the following coating agents to prepare a total of 100 parts by mass.
- the solid content mass ratio of the water dispersion of polyester resin PES-1 (PES-1WD) and the water dispersion of polyurethane resin PU-1 (PU-1WD) was 65/35, and the total solid resin content was 4% by mass.
- the solid content mass ratios of the particles (PA-1) and (PA-2) were set to 12.0 and 0.4, respectively, with respect to the total solid content of 100 of the above-mentioned resin and the like.
- Table 1 shows the compounding ratio of the resin and the like in each coating liquid.
- Table 2 shows the ratio of each resin in the total resin content of polyester resin and polyurethane resin and / or acrylic resin and the ratio of cross-linking agent in the coating film based on the compounding ratio of Table 1.
- This unstretched PET sheet was heated to 100°C by a group of heated rolls and an infrared heater, and then stretched 3.5 times in the longitudinal direction by a group of rolls with a difference in circumferential speed to obtain a uniaxially stretched PET film.
- the coating solution (No. 1) was applied to one side of the PET film so that the final coating amount (after biaxial stretching) after drying was 0.08 g/m 2 .
- the coating was dried by heat treatment at 90° C. for 3 seconds and 40° C. for 3 seconds.
- the film was stretched 4.0 times in the width direction at 110° C. and heated at 230° C. for 5 seconds while the width direction of the film was fixed. Further, a 3% relaxation treatment in the width direction was performed to obtain a laminated polyester film having a thickness of 100 ⁇ m.
- the thickness of the coating layer was 70 nm. Table 3 shows the evaluation results of this film.
- Examples 2 to 12 A laminated polyester film was obtained in the same manner as in Example 1, except that the coating solution No. described in each example in Table 3 was used as the coating solution of Example 1.
- the types and compounding ratios of the resins and the like used in each coating liquid No. and the particles shown in Table 1 were used.
- Table 2 also shows the ratio of each resin in the total resin content of the polyester resin, polyurethane resin and/or acrylic resin and the ratio of the cross-linking agent in the coating film.
- the acrylic resin-treated particles (P-3-A) described above were used as the particles, the resin ratio and the like were calculated in consideration of the content of the acrylic resin adhering to the particles.
- Example 13 A laminated polyester film was obtained in the same manner as in Example 1, except that E-2 was used instead of E-1 as the film material resin.
- Table 3 shows the evaluation results of each example and comparative example.
- the present invention has made it possible to provide a laminated polyester film having optimum easy-adhesiveness for all fields such as optical applications, packaging applications and label applications.
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Abstract
Description
(1)ポリエステルフィルム基材の少なくとも1面に塗布層を備える積層ポリエステルフィルムであって、前記塗布層は、ポリエステル樹脂と、ポリウレタン樹脂及び/またはアクリル樹脂を含む組成物から形成され、前記塗布層の1-ブロモナフタレンの着滴1秒後の接触角(A)が13~25度、かつ着滴5秒後の接触角(B)が9~20度である積層ポリエステルフィルム。
(2)前記塗布層の1-ブロモナフタレンの着滴1秒後の接触角(A)と着滴5秒後の接触角(B)の差(A-B)が4~7度である上記(1)記載の積層ポリエステルフィルム。
本発明においてポリエステルフィルム基材を構成するポリエステル樹脂は、ポリエチレンテレフタレート、ポリブチレンテレフタレート、ポリエチレン-2,6-ナフタレート、ポリトリメチレンテレフタレートなどのほか、前記のようなポリエステル樹脂のジオール成分又はジカルボン酸成分の一部を以下のような共重合成分に置き換えた共重合ポリエステル樹脂であり、例えば、共重合成分として、ジエチレングリコール、ネオペンチルグリコール、1,4-シクロヘキサンジメタノール、ポリアルキレングリコールなどのジオール成分や、アジピン酸、セバチン酸、フタル酸、イソフタル酸、5-ナトリウムイソフタル酸、2,6-ナフタレンジカルボン酸などのジカルボン酸成分などを挙げることができる。
本発明者は、前述の様に接触角を測定する溶剤種について、種々検討した。特に接触角測定には、シリンジ針先での液滴の生成、測定面への付着及び測定中の溶剤の安定性が重要であり、その点も考慮して、比較的比重が高い(1.48)ことから、シリンジ針先で液滴が生成及び測定面への付着が容易であり、かつ比較的沸点が高い(282℃)ことから、測定中の気化を無視できる1-ブロモナフタレンを選択した。
ポリエステル系樹脂は、通常、ジカルボン酸とジオールから得ることができる。ジカルボン酸としては、例えば、コハク酸、グルタル酸、アジピン酸、トリメチルアジピン酸、ピメリン酸、2,2-ジメチルグルタル酸、アゼライン酸、セバシン酸、フマル酸、マレイン酸、イタコン酸等の脂肪族ジカルボン酸、フタル酸、テレフタル酸、イソフタル酸、ベンジルマロン酸、ジフェン酸、4,4’-オキシジ安息香酸、2,6-ナフタレンジカルボン酸、1,8-ナフタレンジカルボン酸、2,3-ナフタレンジカルボン酸、2,7-ナフタレンジカルボン酸等のナフタレンジカルボン酸等の芳香族ジカルボン酸、1,3-シクロペンタンジカルボン酸、1,2-シクロヘキサンジカルボン酸、1,3-シクロペンタンジカルボン酸、1,4-シクロヘキサンジカルボン酸、2,5-ノルボルナンジカルボン酸等の脂環族ジカルボン酸等が、三価以上のポリカルボン酸としては、例えば、トリメリット酸、ピロメリット酸、アダマンタントリカルボン酸、トリメシン酸等が挙げられる。これらは、単独または2種以上併せて用いることができる。
プロピレングリコール、ジプロピレングリコール、2,4-ジメチル-2-エチルヘキサン-1,3-ジオール、2-メチル-1,3-プロパンジオール、2,2-ジメチル-1,3-プロパンジオール(ネオペンチルグリコール)、1,3-ブタンジオール、3-メチル-1,5-ペンタンジオール、2,2,4-トリメチル-1,6-ヘキサンジオール等の分岐脂肪族ジオール、
1,2-シクロヘキサンジメタノール、1,3-シクロヘキサンジメタノール、1,4-シクロヘキサンジメタノール、スピログリコール、トリシクロデカンジメタノール等の脂環族ジオール;
4,4’-メチレンジフェノール、ビスフェノールS,ビスフェノールA、ビスフェノールフルオレン、4,4’-ジヒドロキシビフェニル、2,5-ナフタレンジオール、p-キシレンジオール等の芳香族ジオールまたはこれらのエチレンオキサイド、プロピレンオキサイド付加体等が、三価以上のポリオールとしては、ペンタエリスリトール、ジペンタエリスリトール、トリペンタエリスリトール、グリセリン、トリメチロールプロパン、トリメチロールエタン等が挙げられる。これらは、単独または2種以上併せて用いることができる。
ポリウレタン樹脂とは、少なくともポリオール成分とポリイソシアネート成分、さらに必要に応じて鎖延長剤に由来するウレタン樹脂である。
比較的高分子量なもの、例えば、カルボキシル基含有ポリアルキレングリコール、カルボキシル基含有アクリルポリオール、カルボキシル基含有ポリオレフィンポリオール、カルボキシル基含有ポリエステルポリオール等が使用することができる。また、比較的低分子量なもの、例えば、2,2-ジメチロールプロピオン酸、2,2-ジメチロールブタン酸、2,2-ジメチロール酪酸、2,2-ジメチロール吉草酸等を使用することができる。カルボキシル基導入には、特に、2,2-ジメチロールプロピオン酸、2,2-ジメチロールブタン酸が好適に使用される。
本発明におけるアクリル樹脂とは、アクリル酸、メタクリル酸またはそれらのエステルから主に形成された共重合体である。アクリル酸またはメタクリル酸エステルとしては種々の化合物を使用することができる。例えば、メチルアクリレート、エチルアクリレート、イソプロピルアクリレート、n-ブチルアクリレート、イソブチルアクリレート、n-アミルアクリレート、n-ヘキシルアクリレート、2-エチルヘキシルアクリレート、n-オクチルアクリレート、デシルアクリレート、ドデシルアクリレート、シクロヘキシルアクリレート、イソボルニルアクリレート、ステアリルアクリレート等のアクリル酸エステル類が、メタクリル酸エステルとして前述のアクリル酸をメタクリル酸に置き換えたものが挙げられる。
本発明における塗材用の溶剤として下記の様なものが使用可能である。
例えば、メタノール、エタノール、n-プロパノール、イソプロパノール、n-ブタノール、イソブタノール、sec-ブタノール、tert-ブタノール、n-アミルアルコール、イソアミルアルコール、sec-アミルアルコール、tert-アミルアルコール、1-エチル-1-プロパノール、2-メチル-1-ブタノール、n-ヘキサノール、シクロヘキサノールなどのアルコール類;メチルエチルケトン、メチルイソブチルケトン、エチルブチルケトン、シクロヘキサノン、イソホロンなどのケトン類;テトラヒドロフラン、ジオキサンなどのエーテル類;酢酸エチル、酢酸-n-プロピル、酢酸イソプロピル、酢酸-n-ブチル、酢酸イソブチル、酢酸-sec-ブチル、酢酸-3-メトキシブチル、プロピオン酸メチル、プロピオン酸エチル、炭酸ジエチル、炭酸ジメチルなどのエステル類;エチレングリコール、エチレングリコールモノメチルエーテル、エチレングリコールモノエチルエーテル、エチレングリコールモノプロピルエーテル、エチレングリコールモノブチルエーテル、エチレングリコールエチルエーテルアセテート、ジエチレングリコール、ジエチレングリコールモノメチルエーテル、ジエチレングリコールモノエチルエーテル、ジエチレングリコールモノブチルエーテル、ジエチレングリコールエチルエーテルアセテート、プロピレングリコール、プロピレングリコールモノメチルエーテル、プロピレングリコールモノブチルエーテル、プロピレングリコールメチルエーテルアセテートなどのグリコール誘導体;トルエン、キシレンなどの芳香族炭化水素類、テトラヒドロフラン、テトラヒドロピラン、1,3-ジオキソラン、1,2-ジオキサン、1,3-ジオキサン、1,4-ジオキサン、1,4-ジオキセン、アニソールなどのエーテル類、さらには、3-メトキシ-3-メチルブタノール、3-メトキシブタノール、アセトニトリル、ジメチルホルムアミド、ジメチルアセトアミド、N-メチルピロリドン、ジアセトンアルコール、アセト酢酸エチル、シクロヘキサンが挙げられ、必要に応じて、これらの有機溶剤を混合して用いてもよい。
本発明においては、ケトン類、エステル類、グリコール誘導体の使用が特に好ましい。
本発明においては、塗布層には前述の樹脂に架橋剤を併用することが望ましい。架橋剤を併用することにより、塗布層の接触角を高めることが可能となる。また、架橋剤中に先述の親水性成分を含有させることで、さらに接触角を高めることが可能である。架橋剤の種類としては特に制限はなく、イソシアネート系、オキサゾリン系、カルボジイミド系、エポキシ系、メラミン系等が使用可能である。
架橋剤には本発明における接触角の数値を高める効果があるため、架橋剤が50質量%未満であると、接触角の数値が本発明における好ましい範囲に調整が容易となり密着性等の観点で好ましい。架橋剤は45質量%以下であることがより好ましく、40質量%以下であることが特に好ましい。
本発明における塗布層中には、本発明の効果を阻害しない範囲において公知の添加剤、例えば界面活性剤、酸化防止剤、耐熱安定剤、耐候安定剤、紫外線吸収剤、有機または無機の易滑剤、顔料、染料、有機または無機の粒子、帯電防止剤等を添加しても良い。
本発明の積層ポリエステルフィルムの製造方法について、ポリエチレンテレフタレート(以下、PETと略記する場合がある)フィルム基材を用いた例を挙げて説明するが、当然これに限定されるものではない。
得られた積層ポリエステルフィルムのヘイズはJIS K 7136:2000に準拠し、濁度計(日本電色製、NDH5000)を用いて測定した。
25℃、50%RHの条件下で接触角計(協和界面科学株式会社製: 全自動接触角計(DM-701)を用いてフィルムの樹脂層面に、22Gのシリンジ針を用いて1-ブロモナフタレンの液滴を作製し、その接触角を自動測定した。接触角は、液を樹脂層面に滴下後、1000ms(1秒)、5000ms(5秒)後の接触角を採用した。接触角は、場所を変えて計7点測定し、これらの測定値中の最大値と最小値を除く計5点の平均値とした。また、本測定は下記ソフトおよび下記設定で実施した
ソフト 界面測定/解析総合システムFAMAS(Ver3.7.2)
液滴安定待ち:500ms
着滴認識ライン:50dot
液量制御:0.9μL
手法:液滴法、方法:θ/2法
樹脂及び架橋剤の酸価はJIS K-1557-5記載の滴定滴定法により測定した。
但し、アミン等で中和処理されたカルボキシル基の場合は、高温処理によりアミン等を除去するか、予め塩酸等で処理してアミン等を遊離、除去させてから測定した。測定する樹脂が溶剤であるイソプロパノールへの溶解性が悪い場合には、代わりにN-メチルピロリドンを使用した。上記等のいずれの処理でも、対比用の測定は十分に実施した。
2枚のフィルム試料を塗布層面同士が対向するように重ね合わせ、98kPaの荷重を掛け、これを50℃の雰囲気下で24時間密着させ、放置した。その後、フィルムを剥離し、その剥離状態を下記の基準で判定した。
◎:塗布層の転移がなく軽く剥離できる。
○:塗布層の転移がないが、剥離時に少し抵抗がある。
△:塗布層は維持されているが、部分的に塗布層の表層が相手面に転移している。
×:2枚のフィルムが固着し剥離できないもの、あるいは剥離できてもフィルム基材が劈開している。
基準として〇以上を合格とした。
積層ポリエステルフィルムの塗布層上に、下記に記載したハードコート塗剤(HC-ア)を#5ワイヤーバーを用いて塗布し、80℃で1分間乾燥した。次いで、塗布したフィルムに高圧水銀灯を用いて100mJ/cm2の紫外線を照射し、ハードコートフィルム(ア)を得た。次いで、隙間間隔2mmのカッターガイドを用いて、ハードコート層を貫通してフィルム基材に達する100個のマス目状の切り傷をハードコート層面につける。次いで、セロハン粘着テープ(ニチバン製、405番;24mm幅)をマス目状の切り傷面に貼り付け、しっかり付着させる。その後、垂直にセロハン粘着テープをハードコートフィルム(ア)のハードコート層面から引き剥がした。粘着テープ付着剥離操作を同一ヵ所で計5回行った後、ハードコートフィルム(ア)のハードコート層面から剥がれたマス目の数を目視で数え、下記の式からハードコート層とフィルム基材との密着性を求める。なお、マス目の中で部分的に剥離しているものも剥がれたマス目として数えて、下記式の様にハードコートフィルム(ア)の密着性(ア)を求めた。
密着性(A)(%)=100-(剥がれたマス目の数)
密着性を下記の基準で判定した。
◎:100%、○:96~99%、△:80~95%、×:80%未満。
基準として〇以上を合格とした。
ジペンタエリスリトールポリアクリレート( 新中村化学(株)製A - 9950)67質量部、トリメチロールプロパントリアクリレート( 新中村化学(株)製A - TMPT)15質量部、
ポリプロピレングリコール#400ジアクリレート( 新中村化学(株)製APGー400)15質量部と光重合開始剤(IGM Resins B.V.社製 Omnirad184)3質量部からなるハードコート剤をトルエン/メチルエチルケトン=50/50(質量比)(溶剤ア)に溶解して、固形分濃度50質量%のハードコート塗剤(HC-ア)を調製した。
溶剤の種類を変更した以外は、上記と同様にしてハードコート塗剤(HC-イ)からハードコート塗剤(HC-エ)を調製した。
溶剤ア:トルエン/メチルエチルケトン=50/50(質量比)
溶剤イ:トルエン/酢酸エチル=25/75(質量比)
溶剤ウ:メチルエチルケトン=100(質量比)
溶剤エ:プロピレングリコールモノメチルエーテル/メチルエチルケトン=40/60(質量比)
上記(5)と同様に作製したハードコートフィルム(ア)及び(イ)を80℃、80%RHの環境下で塗布面を垂直にし、かつ塗布面に他のフィルム等の接触がない状態で500時間放置した。処理後、23℃、65%RHの環境下に、塗布面に他のフィルム等の接触がない状態で10分間放置した。時間経過直後に塗布面の密着性を先述と同様に評価して、耐湿熱性(ア)及び(イ)とした。
攪拌機、温度計、および部分還流式冷却器を具備するステンレススチール製オートクレーブに、ジメチルテレフタレート471質量部、ジメチルイソフタレート471質量部、ジメチル-5-ナトリウムスルホイソフタレート44.4質量部、エチレングリコール444質量部、ネオペンチルグリコール882質量部およびテトラ-n-ブチルチタネート0.4質量部を仕込み、160℃から220℃の温度で4時間かけてエステル交換反応を行なった。次いで255℃まで昇温し、反応系を徐々に減圧した後、30Paの減圧下で1時間30分反応させ、共重合ポリエステル樹脂(PES-1)を得た。得られた共重合ポリエステル樹脂(PES-1)は、淡黄色透明の固体であり、樹脂の還元粘度は0.60dL/g、ガラス転移点(Tg)は61℃であり、酸価は0.8mgKOH/gであった。共重合ポリエステル樹脂(PES-1)の組成はテレフタル酸/イソフタル酸/5-ナトリウムスルホイソフタル酸//エチレングリコール/ネオペンチルグリコール=48.5/48.5/3//48/52(モル比)であった。
共重合ポリエステル樹脂PES-2:テレフタル酸/5-ナトリウムスルホイソフタル酸//エチレングリコール/ジエチレングリコール/ビスフェノールAのEO付加物(n=2)=97/3//70/5/25(モル比)。還元粘度:0.49dL/g、ガラス転移点(Tg):69℃、酸価:1.0mgKOH/gであった。
共重合ポリエステル樹脂PES-3:テレフタル酸/セバシン酸/5-ナトリウムスルホイソフタル酸//エチレングリコール/ジエチレングリコール/ビスフェノールAのEO付加物(n=2)=60/38.5/1.5//30/55/15(モル比)。還元粘度:0.55dL/g、ガラス転移点(Tg):44℃、酸価は0.8mgKOH/gであった。
共重合ポリエステル樹脂PES-4:2,6-ナフタレンジカルボン酸/テレフタル酸/セバシン酸/5-ナトリウムスルホイソフタル酸//エチレングリコール/ジエチレングリコール/1,6-ヘキサンジオール=70/9/15/6//45/5/50(モル比)。
還元粘度:0.53dL/g、ガラス転移点(Tg):37℃、酸価は0.6mgKOH/gであった。
共重合ポリエステル樹脂PES-5:テレフタル酸/イソフタル酸//エチレングリコール/1,4-ブタンジオール/ジエチレングリコール/ポリエチレングリコール(600)=85/15//57/40/2/1(モル比)、還元粘度:0.51dL/g、ガラス転移点(Tg):47℃、酸価は0.4mgKOH/gであった。
攪拌機、温度計と還流装置を備えた反応器に、共重合ポリエステル樹脂(PES-1)と、エチレングリコール-n-ブチルエーテルを同質量部入れ、110℃で加熱、攪拌し樹脂を溶解した。樹脂が完全に溶解した後、所定量の水をこのポリエステル溶液に攪拌しつつ徐々に添加し、添加終了後、液を攪拌しつつ室温まで冷却した。水を適量添加して、固形分30質量%の共重合ポリエステル樹脂PES-1の水分散体(PES-1WD)を調製した。
攪拌機、温度計と減圧蒸留装置を備えた反応器に、共重合ポリエステル樹脂(PES-2)と、樹脂の3倍質量部のテトラヒドロフランを入れて溶解させた。樹脂の10%質量部のポリ(オキシエチレン)アルキルエーテル (アルキル基C12~15、エチレンオキシド付加モル数11~19モル)を添加した。得られた溶液を攪拌しつつ樹脂の3倍質量部の水を滴下して乳白色の分散体を得た。次いでこの分散体を2.5kPaの減圧下で蒸留して、テトラヒドロフランを留去し、液を攪拌しつつ室温まで冷却した。水を適量添加して、樹脂固形分30質量%の共重合ポリエステル樹脂PES-2の水分散体(PES-2WD)を調製した。
撹拌機、ジムロート冷却器、窒素導入管、シリカゲル乾燥管、及び温度計を備えた4つ口フラスコに、ジシクロヘキシルメタン4,4‘-ジイソシアナート58.0質量部、数平均分子量800のポリカーボネートジオール(1,6-ヘキサンジオールタイプ)90.8質量部、及び溶剤としてエチルメチルケトン244質量部を投入し、窒素雰囲気下、75℃において1時間撹拌した。次いで、この反応液に、数平均分子量800のポリエチレングリコールモノメチルエーテル44質量部とネオペンチルグリコール7.2質量部を加えて、さらに2時間攪拌して、反応液が所定のアミン当量に達したことを確認した。この反応液を室温以下に降温することにより、固形分45.0質量%のポリウレタン樹脂(PU-1溶液を得た。このポリウレタン樹脂(PU-1)溶液の固形分酸価は0.2mgKOH/gであった。
撹拌機、ジムロート冷却器、窒素導入管、シリカゲル乾燥管、及び温度計を備えた4つ口フラスコに、ジシクロヘキシルメタン4,4‘-ジイソシアナート54.06質量部、ジメチロールプロピオン酸20.0質量部、数平均分子量2000のポリカーボネートジオール(1,6-ヘキサンジオールタイプ)126.0質量部、及び溶剤としてエチルメチルケトン224質量部を投入し、窒素雰囲気下、75℃において3時間撹拌し、反応液が所定のアミン当量に達したことを確認した。この反応液を室温以下に降温することにより、固形分45.0質量%のポリウレタン樹脂(PU-2)溶液を得た。このポリウレタン樹脂(PU-2)溶液の固形分酸価は41.8mgKOH/gであった。
前述のポリウレタン樹脂(PU-2)の重合と同様にして下記の組成(質量比)及び酸価の固形分45.0質量%のポリウレタン樹脂(PU-3)からポリウレタン樹脂(PU-6)を重合した。
ポリウレタン樹脂(PU-3):
(シクロヘキサン-1,2-ジイルビスメチレン)ジイソシアナート/数平均分子量1000のポリカーボネートジオール(1,6-ヘキサンジオールタイプ)/ジメチロールプロピオン酸/1,6-ヘキサンジオール=26.0/64.8/6.2/3.0(質量比)
酸価:25.9mgKOH/g
ポリウレタン樹脂(PU-4):
ジシクロヘキシルメタン4,4‘-ジイソシアナート/数平均分子量2000のポリカーボネートジオール(1,6-ヘキサンジオール/1,5-ペンタンオールタイプ=50/50(モル比)タイプ)/ジメチロールプロピオン酸=20.5/73.5/6.0(質量比)
酸価:25.1mgKOH/g
ポリウレタン樹脂(PU-5):
ジシクロヘキシルメタン4,4‘-ジイソシアナート/数平均分子量2000のポリエステルジオール(テレフタル酸/イソフタル酸//エチレングリコール/ネオペンチルグリコール=50/50//50/50(モル比))/ジメチロールプロピオン酸/ネオペンチルグリコール=36.0/49.5/11.8/2.7(質量比)
酸価:49.4mgKOH/g
ポリウレタン樹脂(PU-6):
ジシクロヘキシルメタン4,4‘-ジイソシアナート/数平均分子量2000のポリエステルジオール(セバシン酸//3-メチル-1,5-ペンタンジオール=100//100(モル比))/ジメチロールプロピオン酸/ネオペンチルグリコール=36.0/49.5/11.8/2.7(質量比)、
酸価:49.4mgKOH/g
高速攪拌可能なホモディスパーを備えた反応容器に、所定量の水を添加して、25℃に調整して、2000min-1で攪拌混合しながら、前述のポリウレタン樹脂(PU-1)溶液を添加して水分散することにより乳白色の分散体を得た。次いでこの分散体を2.5kPaの減圧下で蒸留して、エチルメチルケトンを除去した。水で濃度調整することにより、固形分35質量%のポリウレタン樹脂(PU-1の水分散体(PU-1WD)を調製した。
撹拌機、ジムロート冷却器、窒素導入管、シリカゲル乾燥管、及び温度計を備えた4つ口フラスコに、所定量のポリウレタン樹脂(PU-2)溶液の入れ、この溶液に室温で、ポリウレタン樹脂(PU-2)の酸価と所定量に対応する当量の1.05倍のトリエタノールアミンを添加し、そのまま30分間攪拌した。次に、高速攪拌可能なホモディスパーを備えた反応容器に、所定量の水を添加して、25℃に調整して、2000min-1で攪拌混合しながら先述のポリウレタン樹脂(PU-2)の中和溶液を添加して水分散することにより乳白色の分散体を得た。その後、2.5kPaの減圧下で、溶剤であるエチルメチルケトンを除去した。水で濃度調整することにより、固形分35質量%のポリウレタン樹脂(PU-2)の水分散体(PU-2WD)を調製した。
前述のポリウレタン樹脂(PU-2)の水分散体(PU-2WD)の調製と同様にして水分散体を調製した。但し、トリエタノールアミンに代わりにトリエチルアミンを使用し、添加するトリエチルアミンの量は各々のポリウレタン樹脂の酸価に合せて調整した。
撹拌機、温度計、還流冷却管を備えたフラスコに溶媒としてプロピレングリコールモノメチルエーテル129.6質量部を入れ、100℃に加熱保持して、メタクリル酸メチル195.2質量部(64モル%)、アクリル酸エチル84.1質量部(28モル%)、2-ヒドロキシエチルメタクリレート7.8質量部(2モル%)、Nーメチロールアクリルアミド15.2質量部(5モル%)及びアゾビスイソブチロニトリル5質量部(1モル%)の混合物を3時間かけて滴下した。滴下後、同温度で2時間熟成させた。この反応液を室温以下に降温することにより、固形分70.0質量%のアクリル樹脂(A-1)溶液を得た。このアクリル樹脂(A―1)溶液の固形分酸価は0.4mgKOH/gであった。
前述のアクリル樹脂(A-1)溶液の所定量に、室温でアクリル樹脂(A-1)の1.5質量%のアルキルジフェニルエーテルジスルホン酸ナトリウムを添加し、そのまま30分間攪拌してアクリル樹脂(A-1)の混合溶液を作製した。次に、高速攪拌可能なホモディスパーを備えた反応容器に、所定量の水を添加して、25℃に調整して、2000min-1で攪拌混合しながら、前述のアクリル樹脂(A-1)混合溶液を添加して水分散した。水で濃度調整することにより、樹脂固形分30質量%のアクリル樹脂(A-1)の水分散体(A-1WD)を調製した。
アクリル樹脂(A-1)と同様の工程により、メタクリル酸メチル70モル%、アクリル酸エチル20モル%、メトキシ-ポリエチレングリコール(n=9)アクリレート5モル%、N-メチロールアクリルアミド5モル%の樹脂組成比である固形分70.0質量%のアクリル樹脂(A-2)溶液を得た。このアクリル樹脂(A―2)溶液の固形分酸価は0.2mgKOH/gであった。
高速攪拌可能なホモディスパーを備えた反応容器に、所定量の水を添加して、25℃に調整して、2000min-1で攪拌混合しながら、前述のアクリル樹脂(A-2)溶液を所定量添加して水分散した。水で濃度調整することにより、樹脂固形分30質量%のアクリル樹脂(A-2)の水分散体(A-2WD)を調製した。
アクリル樹脂(A-1)と同様の工程により、アクリル酸エチル34モル%、アクリル酸ブチル15モル%、2-ヒドロキシエチルメタクリレート5モル%、メタクリル酸メチル38モル%、メタクリル酸8モル%の樹脂組成比である固形分70.0質量%のアクリル樹脂(A-3)溶液を得た。このアクリル樹脂(A-3)液の固形分酸価は36.7mgKOH/gであった。
前述のアクリル樹脂(A-3)溶液に、室温で樹脂酸価に対して1.05当量のトリエチルアミンを添加し、そのまま30分間攪拌してアクリル樹脂(A-3)の混合溶液を作製した。次いで、高速攪拌可能なホモディスパーを備えた反応容器に、所定量の水を加え、25℃で、2000min-1で攪拌混合しながら、前述のアクリル樹脂(A-3)の混合溶液を添加して水分散した。水で濃度調整することにより、固形分30質量%のアクリル樹脂(A-3)の水分散体(A-3WD)を調製した。
アクリル樹脂(A-1)と同様の工程により、メタクリル酸メチル41モル%、アクリル酸エチル47モル%、アクリロニトリル8モル%、N-メチロールアクリルアミド4モル%の樹脂組成比である固形分70.0質量%のアクリル樹脂(A-4)溶液を得た。このアクリル樹脂(A―4)溶液の固形分酸価は0.2mgKOH/gであった。
前述のアクリル樹脂(A-4)溶液の所定量に、室温でアクリル樹脂(A-4)固形分の1.0質量%のポリオキシエチレン(n=13)オレイルエーテルを添加し、そのまま30分間攪拌してアクリル樹脂(A-4)の混合溶液を作製した。次に、高速攪拌可能なホモディスパーを備えた反応容器に、所定量の水を添加して、25℃に調整して、2000min-1で攪拌混合しながら、前述のアクリル樹脂(A-4)混合溶液を添加して水分散した。水で濃度調整することにより、樹脂固形分30質量%のアクリル樹脂(A-4)の水分散体(A-4WD)を調製した。
撹拌機、温度計、還流冷却管を備えたフラスコにヘキサメチレンジイソシアネート51.5質量部、ジメチロールプロピオン酸20.5質量部、ジプロピレングリコールジメチルエーテル150.0質量部を加えて、窒素雰囲気下、70℃で2時間保持した。その後、メチルエチルケトンオキシム28.0質量部を滴下した。反応液の赤外スペクトルを測定し、イソシアネート基の吸収が消失したことを確認した。次いで、この反応液を室温以下に冷却し、トリエチルアミン16.2質量部を滴下混合した。さらに所定量の水をこの混合液に加えて、固形分40.0質量%のブロックイソシアネート系架橋剤(C-1)溶液を調製した。
撹拌機、温度計、還流冷却管を備えたフラスコに、水50.0質量部とメトキシプロピルアルコール50.0質量部を仕込み、窒素雰囲気下、80℃に加熱した。その後、メタクリル酸メチル45.0質量部、2-イソプロペニル-2-オキサゾリン30.0質量部、2-ヒドロキシエチルメタクリレート10.0質量部およびn=10のポリエチレングリコールとメタクリル酸のエステル化合物15.0質量部からなる単量体混合物と2,2’-アゾビス(2-アミジノプロパン)二塩酸塩5.0質量部および水50.0質量部からなる重合開始剤溶液をそれぞれ滴下ロートから窒素雰囲気下、フラスコ内を80℃に保持しつつ2時間かけて滴下した。滴下終了後、80℃、5時間攪拌した後、室温まで冷却した。水を適量添加して、固形分40質量%のオキサゾリン系架橋剤(C-2)溶液を調製した。
撹拌機、温度計、還流冷却管を備えたフラスコにヘキサメチレンジイソシアネートを原料としたイソシアヌレート構造を有するポリイソシアネート化合物(旭化成ケミカルズ製、デュラネートTPA-100)55.5質量部、ジプロピレングリコールジメチルエーテル30.0質量部と数平均分子量500のポリエチレングリコール23.2質量部を加えて、窒素雰囲気下、70℃で2時間保持した。その後、3,5-ジメチルピラゾール21.3質量部とジプロピレングリコールジメチルエーテル20質量部からなる溶液を滴下した。反応液の赤外スペクトルを測定し、イソシアネート基の吸収が消失したことを確認後、攪拌しつつ、水を適量添加し、固形分40.0質量%のブロックイソシアネート系架橋剤(C-3)溶液を調製した。
撹拌機、温度計、還流冷却管を備えたフラスコにヘキサメチレンジイソシアネートを原料としたイソシアヌレート構造を有するポリイソシアネート化合物(旭化成ケミカルズ製、デュラネートTPA-100)62.8質量部、ジプロピレングリコールジメチルエーテル30.0質量部とジメチロールプロピオン酸7.2質量部を加えて、窒素雰囲気下、70℃で2時間保持した。その後、3,5-ジメチルピラゾール24.3質量部とジプロピレングリコールジメチルエーテル20質量部からなる溶液を滴下した。反応液の赤外スペクトルを測定し、イソシアネート基の吸収が消失したことを確認後、トリエチルアミン5.7質量部を添加後、攪拌しつつ、水を適量添加し、固形分40.0質量%のブロックイソシアネート系架橋剤(C-4)溶液を調製した。
(粒子P-1)
粒子(P-1)として固形分濃度20質量%である平均粒径10~15nmのコロイダルシリカ(スノーテックスO;日産化学(株)製)を粒子(P-1)溶液としてそのまま用いた。
粒子(P-2)として固形分濃度20質量%である平均粒径500nmのコロイダルシリカ(シーホスターKE-W50;(株)日本触媒)を粒子(P-2)溶液としてそのまま用いた。
粒子(P-3)として固形分濃度20質量%である平均粒径10~20nmの酸化ジルコニア粒子(ZSL00014;第一稀元素化学工業(株))を粒子(P-3)溶液としてそのまま用いた。
撹拌機と温度計を備えたフラスコに、前述の粒子(P-3)溶液50質量部に、攪拌しつつ前述のアクリル樹脂(A-3)溶液5質量部を徐々に添加した。添加完了後、室温で1時間攪拌した後、所定量の水を加えて、固形分濃度20質量%のアクリル樹脂処理粒子(P-3-A)を調製した。この粒子の固形分は酸化ジルコニア粒子分が74.1質量%、アクリル樹脂が25.9質量%であった。
(三酸化アンチモン溶液の調製)
三酸化アンチモン(シグマ アルドリッチ ジャパン合同会社製)をエチレングリコールとともにフラスコに仕込み、150℃で4時間攪拌して溶解後、室温まで冷却して、20g/Lの三酸化アンチモンのエチレングリコール溶液を調製した。
攪拌機付き2リッターステンレス製オートクレーブに高純度テレフタル酸とその2倍モル量のエチレングリコールを仕込み、トリエチルアミンを酸成分に対して0.3モル%加え、0.25MPaの加圧下250℃にて水を系外に留去しながらエステル化反応を行いエステル化率が約95%のビス(2-ヒドロキシエチル)テレフタレートおよびオリゴマーの混合物(以下BHET混合物という)を得た。このBHET混合物に重縮合触媒として、上記三酸化アンチモン溶液を用い、ポリエステル中の酸成分に対してアンチモン原子として0.04モル%になるように加え、次いで、窒素雰囲気下、常圧にて250℃で10分間攪拌した。その後、60分間かけて280℃まで昇温しつつ反応系の圧力を徐々に下げて13.3Pa(0.1Torr)として、さらに280℃、13.3Paで68分間重縮合反応を実施して、固有粘度(IV)(溶媒:フェノール/テトラクロロエタン=60/40)が0.61dL/gであり、粒子を実質上含有していないポリエステル樹脂(E-1)を得た。
(アルミニウム化合物溶液の調製例)
塩基性酢酸アルミニウム(ヒドロキシアルミニウムジアセテート;シグマ アルドリッチ ジャパン合同会社製)の20g/L水溶液に対して等量(容量比)のエチレングリコールをともにフラスコに仕込み、室温で6時間攪拌した後、減圧(133Pa)下、70~90℃で数時間攪拌しながら系から水を留去し、20g/Lのアルミニウム化合物のエチレングリコール溶液を調製した。
リン化合物として3,5-ジ-tert-ブチル-4-ヒドロキシベンジルホスホン酸 ジエチル(Irganox1222(BASF社製))をエチレングリコールとともにフラスコに仕込み、窒素置換下攪拌しながら液温160℃で25時間加熱し、50g/Lのリン化合物のエチレングリコール溶液を調製した。
上記アルミニウム化合物の調製例および上記リン化合物の調製例で得られたそれぞれのエチレングリコール溶液をフラスコに仕込み、アルミニウム原子とリン原子がモル比で1:2となるように室温で混合し、1日間攪拌して触媒溶液を調製した。
重縮合触媒として三酸化アンチモン溶液の代わりに、前述のアルミニウム化合物の溶液とリン化合物の溶液の混合物を用いて、ポリエステル中の酸成分に対してアルミニウム原子およびリン原子としてそれぞれ0.014モル%および0.028モル%になるように
加えた以外は、ポリエステル樹脂E-1と同様に重合した。但し、重合時間は68分間とすることで、固有粘度(IV)が0.61dL/gであり、粒子を実質上含有していないポリエステル樹脂(E-2)を得た。
(1)塗布液(No.1)の調製
水とイソプロパノールの混合溶媒(80/20質量部比)に、下記の塗剤を混合して計100質量部に調整した。ポリエステル樹脂PES-1の水分散体(PES-1WD)とポリウレタン樹脂PU-1の水分散体(PU-1WD)の固形分質量比が65/35、総固形樹脂分濃度4質量%とした。次に、粒子(PA-1)と粒子(PA-2)が前述の樹脂等の総固形分100に対してそれぞれの固形分質量比が12.0及び0.4とした。さらに、この塗布液にシリコーン系界面活性剤の10%水溶液を1質量%添加して塗布液(No.1)を調製した。各塗布液の樹脂等の配合比については表1に示す。また、表1の配合比に基づく、ポリエステル樹脂とポリウレタン樹脂及び/またはアクリル樹脂の全樹脂分中の各樹脂比率及び塗膜中の架橋剤比率を表2に示す
混合溶剤(水/イソプロパノール) 83.85質量部
ポリエステル樹脂(PES-1)の水分散体(PES-1WD)
8.67質量部
ポリウレタン樹脂(PU-1)の水分散体(PU-1WD)
4.00質量部
粒子(P-1)溶液 2.40質量部
粒子(P-2)溶液 0.08質量部
界面活性剤水溶液 1.00質量部
計100.00質量部
フィルム原料樹脂として、ポリエステル樹脂(E-1)の樹脂ペレットを、133Paの減圧下、135℃で6時間乾燥した。その後、押し出し機に供給し、約280℃でシート状に溶融押し出しして、表面温度20℃に保った回転冷却金属ロール上で急冷密着固化させ、未延伸PETシートを得た。
実施例1の塗布液を、表3の各実施例記載の塗布液Noを使用した以外は、実施例1と同様にして、積層ポリエステルフィルムを得た。各塗布液Noに使用した樹脂等の種類と配合量比及び粒子は表1に記載したものを使用した。また、また、ポリエステル樹脂とポリウレタン樹脂及び/またはアクリル樹脂の全樹脂分中の各樹脂比率及び塗膜中の架橋剤比率を表2に示す。特に実施例11では粒子に前述のアクリル樹脂処理粒子(P-3-A)を使用することから、粒子に付着したアクリル樹脂分も含有量に考慮して、樹脂比率等を算出した。
フィルム原料樹脂としてE-1の代わりにE-2を使用した以外は、実施例1と同様にして積層ポリエステルフィルムを得た。
実施例1の塗布液を、表3の各比較例記載の塗布液Noを使用した以外は、実施例1と同様にして、積層ポリエステルフィルムを得た。
Claims (2)
- ポリエステルフィルム基材の少なくとも1面に塗布層を備える積層ポリエステルフィルムであって、前記塗布層は、ポリエステル樹脂と、ポリウレタン樹脂及び/またはアクリル樹脂を含む組成物から形成され、前記塗布層の1-ブロモナフタレンの着滴1秒後の接触角(A)が13~25度、かつ着滴5秒後の接触角(B)が9~20度である積層ポリエステルフィルム。
- 前記塗布層の1-ブロモナフタレンの着滴1秒後の接触角(A)と着滴5秒後の接触角(B)の差(A-B)が4~7度である請求項1記載の積層ポリエステルフィルム。
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