JP4343589B2 - Laminated glass manufacturing method - Google Patents
Laminated glass manufacturing method Download PDFInfo
- Publication number
- JP4343589B2 JP4343589B2 JP2003168815A JP2003168815A JP4343589B2 JP 4343589 B2 JP4343589 B2 JP 4343589B2 JP 2003168815 A JP2003168815 A JP 2003168815A JP 2003168815 A JP2003168815 A JP 2003168815A JP 4343589 B2 JP4343589 B2 JP 4343589B2
- Authority
- JP
- Japan
- Prior art keywords
- resin
- laminated glass
- tert
- temperature
- intermediate film
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000005340 laminated glass Substances 0.000 title claims description 41
- 238000004519 manufacturing process Methods 0.000 title claims description 16
- 229920005989 resin Polymers 0.000 claims description 46
- 239000011347 resin Substances 0.000 claims description 46
- 239000011342 resin composition Substances 0.000 claims description 20
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 17
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 claims description 16
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 16
- 239000000758 substrate Substances 0.000 claims description 11
- 238000002844 melting Methods 0.000 claims description 7
- 230000008018 melting Effects 0.000 claims description 7
- 239000000155 melt Substances 0.000 claims description 3
- -1 (tert-hexyl) Peroxy Chemical group 0.000 description 15
- 239000004342 Benzoyl peroxide Substances 0.000 description 11
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 description 11
- 235000019400 benzoyl peroxide Nutrition 0.000 description 11
- 239000011521 glass Substances 0.000 description 11
- 239000000463 material Substances 0.000 description 10
- 238000001723 curing Methods 0.000 description 8
- 230000037303 wrinkles Effects 0.000 description 8
- 239000012965 benzophenone Substances 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 7
- 239000000178 monomer Substances 0.000 description 7
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 6
- RWCCWEUUXYIKHB-UHFFFAOYSA-N benzophenone Chemical compound C=1C=CC=CC=1C(=O)C1=CC=CC=C1 RWCCWEUUXYIKHB-UHFFFAOYSA-N 0.000 description 6
- 150000002148 esters Chemical class 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- KOMNUTZXSVSERR-UHFFFAOYSA-N 1,3,5-tris(prop-2-enyl)-1,3,5-triazinane-2,4,6-trione Chemical compound C=CCN1C(=O)N(CC=C)C(=O)N(CC=C)C1=O KOMNUTZXSVSERR-UHFFFAOYSA-N 0.000 description 5
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 5
- 239000011229 interlayer Substances 0.000 description 5
- 239000004611 light stabiliser Substances 0.000 description 5
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 4
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 4
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical class CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 4
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 4
- 239000002318 adhesion promoter Substances 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 238000013329 compounding Methods 0.000 description 4
- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 4
- 239000005357 flat glass Substances 0.000 description 4
- 239000012760 heat stabilizer Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 4
- BJELTSYBAHKXRW-UHFFFAOYSA-N 2,4,6-triallyloxy-1,3,5-triazine Chemical compound C=CCOC1=NC(OCC=C)=NC(OCC=C)=N1 BJELTSYBAHKXRW-UHFFFAOYSA-N 0.000 description 3
- XDLMVUHYZWKMMD-UHFFFAOYSA-N 3-trimethoxysilylpropyl 2-methylprop-2-enoate Chemical compound CO[Si](OC)(OC)CCCOC(=O)C(C)=C XDLMVUHYZWKMMD-UHFFFAOYSA-N 0.000 description 3
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 3
- 239000003963 antioxidant agent Substances 0.000 description 3
- 235000006708 antioxidants Nutrition 0.000 description 3
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- 238000013007 heat curing Methods 0.000 description 3
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- 238000009849 vacuum degassing Methods 0.000 description 3
- ACXBKPFXXAQERX-UHFFFAOYSA-N (2-methylpropan-2-yl)oxy cyclohexanecarboperoxoate Chemical compound CC(C)(C)OOOC(=O)C1CCCCC1 ACXBKPFXXAQERX-UHFFFAOYSA-N 0.000 description 2
- AGKBXKFWMQLFGZ-UHFFFAOYSA-N (4-methylbenzoyl) 4-methylbenzenecarboperoxoate Chemical compound C1=CC(C)=CC=C1C(=O)OOC(=O)C1=CC=C(C)C=C1 AGKBXKFWMQLFGZ-UHFFFAOYSA-N 0.000 description 2
- GVJHHUAWPYXKBD-UHFFFAOYSA-N (±)-α-Tocopherol Chemical compound OC1=C(C)C(C)=C2OC(CCCC(C)CCCC(C)CCCC(C)C)(C)CCC2=C1C GVJHHUAWPYXKBD-UHFFFAOYSA-N 0.000 description 2
- OTMBZPVYOQYPBE-UHFFFAOYSA-N 1,1-bis(tert-butylperoxy)cyclododecane Chemical compound CC(C)(C)OOC1(OOC(C)(C)C)CCCCCCCCCCC1 OTMBZPVYOQYPBE-UHFFFAOYSA-N 0.000 description 2
- 239000012956 1-hydroxycyclohexylphenyl-ketone Substances 0.000 description 2
- OETYPRISAXGGQL-UHFFFAOYSA-N 1-tert-butylperoxy-2-methylcyclohexane-1-carboxylic acid Chemical compound CC1CCCCC1(C(=O)O)OOC(C)(C)C OETYPRISAXGGQL-UHFFFAOYSA-N 0.000 description 2
- HGOUNPXIJSDIKV-UHFFFAOYSA-N 2,2-bis(hydroxymethyl)butyl 2-methylprop-2-enoate Chemical compound CCC(CO)(CO)COC(=O)C(C)=C HGOUNPXIJSDIKV-UHFFFAOYSA-N 0.000 description 2
- CHKCPIUYSMYEEW-UHFFFAOYSA-N 2-(2-cyclohexylpropan-2-ylperoxy)-2-ethylhexanoic acid Chemical compound CCCCC(CC)(C(O)=O)OOC(C)(C)C1CCCCC1 CHKCPIUYSMYEEW-UHFFFAOYSA-N 0.000 description 2
- IEMBFTKNPXENSE-UHFFFAOYSA-N 2-(2-methylpentan-2-ylperoxy)propan-2-yl hydrogen carbonate Chemical compound CCCC(C)(C)OOC(C)(C)OC(O)=O IEMBFTKNPXENSE-UHFFFAOYSA-N 0.000 description 2
- 125000000022 2-aminoethyl group Chemical group [H]C([*])([H])C([H])([H])N([H])[H] 0.000 description 2
- XMLYCEVDHLAQEL-UHFFFAOYSA-N 2-hydroxy-2-methyl-1-phenylpropan-1-one Chemical compound CC(C)(O)C(=O)C1=CC=CC=C1 XMLYCEVDHLAQEL-UHFFFAOYSA-N 0.000 description 2
- NJDAKXVXQHKZPQ-UHFFFAOYSA-N 2-methylpentan-2-yloxy cyclohexanecarboperoxoate Chemical compound C1(CCCCC1)C(=O)OOOC(C)(C)CCC NJDAKXVXQHKZPQ-UHFFFAOYSA-N 0.000 description 2
- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 description 2
- 229920002799 BoPET Polymers 0.000 description 2
- 239000004641 Diallyl-phthalate Substances 0.000 description 2
- YIVJZNGAASQVEM-UHFFFAOYSA-N Lauroyl peroxide Chemical compound CCCCCCCCCCCC(=O)OOC(=O)CCCCCCCCCCC YIVJZNGAASQVEM-UHFFFAOYSA-N 0.000 description 2
- 239000002202 Polyethylene glycol Substances 0.000 description 2
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 description 2
- DAKWPKUUDNSNPN-UHFFFAOYSA-N Trimethylolpropane triacrylate Chemical compound C=CC(=O)OCC(CC)(COC(=O)C=C)COC(=O)C=C DAKWPKUUDNSNPN-UHFFFAOYSA-N 0.000 description 2
- JUIBLDFFVYKUAC-UHFFFAOYSA-N [5-(2-ethylhexanoylperoxy)-2,5-dimethylhexan-2-yl] 2-ethylhexaneperoxoate Chemical compound CCCCC(CC)C(=O)OOC(C)(C)CCC(C)(C)OOC(=O)C(CC)CCCC JUIBLDFFVYKUAC-UHFFFAOYSA-N 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 125000000217 alkyl group Chemical group 0.000 description 2
- 150000001408 amides Chemical class 0.000 description 2
- 230000003078 antioxidant effect Effects 0.000 description 2
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical compound OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 description 2
- 150000008366 benzophenones Chemical class 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- QUDWYFHPNIMBFC-UHFFFAOYSA-N bis(prop-2-enyl) benzene-1,2-dicarboxylate Chemical compound C=CCOC(=O)C1=CC=CC=C1C(=O)OCC=C QUDWYFHPNIMBFC-UHFFFAOYSA-N 0.000 description 2
- MQDJYUACMFCOFT-UHFFFAOYSA-N bis[2-(1-hydroxycyclohexyl)phenyl]methanone Chemical compound C=1C=CC=C(C(=O)C=2C(=CC=CC=2)C2(O)CCCCC2)C=1C1(O)CCCCC1 MQDJYUACMFCOFT-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000002788 crimping Methods 0.000 description 2
- 239000003431 cross linking reagent Substances 0.000 description 2
- 125000000113 cyclohexyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 description 2
- 238000007872 degassing Methods 0.000 description 2
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 2
- 239000012634 fragment Substances 0.000 description 2
- 235000011187 glycerol Nutrition 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 125000004401 m-toluyl group Chemical group [H]C1=C([H])C(=C([H])C(=C1[H])C([H])([H])[H])C(*)=O 0.000 description 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- QUAMTGJKVDWJEQ-UHFFFAOYSA-N octabenzone Chemical compound OC1=CC(OCCCCCCCC)=CC=C1C(=O)C1=CC=CC=C1 QUAMTGJKVDWJEQ-UHFFFAOYSA-N 0.000 description 2
- XNTUJOTWIMFEQS-UHFFFAOYSA-N octadecanoyl octadecaneperoxoate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OOC(=O)CCCCCCCCCCCCCCCCC XNTUJOTWIMFEQS-UHFFFAOYSA-N 0.000 description 2
- SRSFOMHQIATOFV-UHFFFAOYSA-N octanoyl octaneperoxoate Chemical compound CCCCCCCC(=O)OOC(=O)CCCCCCC SRSFOMHQIATOFV-UHFFFAOYSA-N 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 150000001451 organic peroxides Chemical class 0.000 description 2
- 229920000620 organic polymer Polymers 0.000 description 2
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 229920001223 polyethylene glycol Polymers 0.000 description 2
- 239000001294 propane Substances 0.000 description 2
- 239000005336 safety glass Substances 0.000 description 2
- 125000004079 stearyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 description 2
- 229940096522 trimethylolpropane triacrylate Drugs 0.000 description 2
- HJIAMFHSAAEUKR-UHFFFAOYSA-N (2-hydroxyphenyl)-phenylmethanone Chemical compound OC1=CC=CC=C1C(=O)C1=CC=CC=C1 HJIAMFHSAAEUKR-UHFFFAOYSA-N 0.000 description 1
- HGXJDMCMYLEZMJ-UHFFFAOYSA-N (2-methylpropan-2-yl)oxy 2,2-dimethylpropaneperoxoate Chemical compound CC(C)(C)OOOC(=O)C(C)(C)C HGXJDMCMYLEZMJ-UHFFFAOYSA-N 0.000 description 1
- QEQBMZQFDDDTPN-UHFFFAOYSA-N (2-methylpropan-2-yl)oxy benzenecarboperoxoate Chemical compound CC(C)(C)OOOC(=O)C1=CC=CC=C1 QEQBMZQFDDDTPN-UHFFFAOYSA-N 0.000 description 1
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 description 1
- NLBJAOHLJABDAU-UHFFFAOYSA-N (3-methylbenzoyl) 3-methylbenzenecarboperoxoate Chemical compound CC1=CC=CC(C(=O)OOC(=O)C=2C=C(C)C=CC=2)=C1 NLBJAOHLJABDAU-UHFFFAOYSA-N 0.000 description 1
- OXYKVVLTXXXVRT-UHFFFAOYSA-N (4-chlorobenzoyl) 4-chlorobenzenecarboperoxoate Chemical compound C1=CC(Cl)=CC=C1C(=O)OOC(=O)C1=CC=C(Cl)C=C1 OXYKVVLTXXXVRT-UHFFFAOYSA-N 0.000 description 1
- ARVUDIQYNJVQIW-UHFFFAOYSA-N (4-dodecoxy-2-hydroxyphenyl)-phenylmethanone Chemical compound OC1=CC(OCCCCCCCCCCCC)=CC=C1C(=O)C1=CC=CC=C1 ARVUDIQYNJVQIW-UHFFFAOYSA-N 0.000 description 1
- RIPYNJLMMFGZSX-UHFFFAOYSA-N (5-benzoylperoxy-2,5-dimethylhexan-2-yl) benzenecarboperoxoate Chemical compound C=1C=CC=CC=1C(=O)OOC(C)(C)CCC(C)(C)OOC(=O)C1=CC=CC=C1 RIPYNJLMMFGZSX-UHFFFAOYSA-N 0.000 description 1
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- DHKHKXVYLBGOIT-UHFFFAOYSA-N 1,1-Diethoxyethane Chemical compound CCOC(C)OCC DHKHKXVYLBGOIT-UHFFFAOYSA-N 0.000 description 1
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- DDMXJSKEBBVELP-UHFFFAOYSA-N 2-ethyl-2-(2-methylpentan-2-ylperoxy)hexanoic acid Chemical compound CCCCC(CC)(C(O)=O)OOC(C)(C)CCC DDMXJSKEBBVELP-UHFFFAOYSA-N 0.000 description 1
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- 125000000954 2-hydroxyethyl group Chemical group [H]C([*])([H])C([H])([H])O[H] 0.000 description 1
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- DWCBWHINVBESJA-UHFFFAOYSA-N [SiH4].CO[Si](OC)(OC)CCCOCC1CO1 Chemical compound [SiH4].CO[Si](OC)(OC)CCCOCC1CO1 DWCBWHINVBESJA-UHFFFAOYSA-N 0.000 description 1
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- 235000010233 benzoic acid Nutrition 0.000 description 1
- FLPKSBDJMLUTEX-UHFFFAOYSA-N bis(1,2,2,6,6-pentamethylpiperidin-4-yl) 2-butyl-2-[(3,5-ditert-butyl-4-hydroxyphenyl)methyl]propanedioate Chemical compound C1C(C)(C)N(C)C(C)(C)CC1OC(=O)C(C(=O)OC1CC(C)(C)N(C)C(C)(C)C1)(CCCC)CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 FLPKSBDJMLUTEX-UHFFFAOYSA-N 0.000 description 1
- XITRBUPOXXBIJN-UHFFFAOYSA-N bis(2,2,6,6-tetramethylpiperidin-4-yl) decanedioate Chemical compound C1C(C)(C)NC(C)(C)CC1OC(=O)CCCCCCCCC(=O)OC1CC(C)(C)NC(C)(C)C1 XITRBUPOXXBIJN-UHFFFAOYSA-N 0.000 description 1
- ZPOLOEWJWXZUSP-WAYWQWQTSA-N bis(prop-2-enyl) (z)-but-2-enedioate Chemical compound C=CCOC(=O)\C=C/C(=O)OCC=C ZPOLOEWJWXZUSP-WAYWQWQTSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- LSXWFXONGKSEMY-UHFFFAOYSA-N di-tert-butyl peroxide Chemical compound CC(C)(C)OOC(C)(C)C LSXWFXONGKSEMY-UHFFFAOYSA-N 0.000 description 1
- GKHRLTCUMXVTAV-UHFFFAOYSA-N dimoracin Chemical compound C1=C(O)C=C2OC(C3=CC(O)=C(C(=C3)O)C3C4C(C5=C(O)C=C(C=C5O3)C=3OC5=CC(O)=CC=C5C=3)C=C(CC4(C)C)C)=CC2=C1 GKHRLTCUMXVTAV-UHFFFAOYSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- FWDBOZPQNFPOLF-UHFFFAOYSA-N ethenyl(triethoxy)silane Chemical compound CCO[Si](OCC)(OCC)C=C FWDBOZPQNFPOLF-UHFFFAOYSA-N 0.000 description 1
- WOXXJEVNDJOOLV-UHFFFAOYSA-N ethenyl-tris(2-methoxyethoxy)silane Chemical compound COCCO[Si](OCCOC)(OCCOC)C=C WOXXJEVNDJOOLV-UHFFFAOYSA-N 0.000 description 1
- SBRXLTRZCJVAPH-UHFFFAOYSA-N ethyl(trimethoxy)silane Chemical compound CC[Si](OC)(OC)OC SBRXLTRZCJVAPH-UHFFFAOYSA-N 0.000 description 1
- 229920006244 ethylene-ethyl acrylate Polymers 0.000 description 1
- 239000005042 ethylene-ethyl acrylate Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- WIGCFUFOHFEKBI-UHFFFAOYSA-N gamma-tocopherol Natural products CC(C)CCCC(C)CCCC(C)CCCC1CCC2C(C)C(O)C(C)C(C)C2O1 WIGCFUFOHFEKBI-UHFFFAOYSA-N 0.000 description 1
- 235000019382 gum benzoic Nutrition 0.000 description 1
- VLAGSAGYAIGJSU-UHFFFAOYSA-N hexanoyl hexaneperoxoate Chemical compound CCCCCC(=O)OOC(=O)CCCCC VLAGSAGYAIGJSU-UHFFFAOYSA-N 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 150000002596 lactones Chemical class 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
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- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- YLHXLHGIAMFFBU-UHFFFAOYSA-N methyl phenylglyoxalate Chemical compound COC(=O)C(=O)C1=CC=CC=C1 YLHXLHGIAMFFBU-UHFFFAOYSA-N 0.000 description 1
- DXGLGDHPHMLXJC-UHFFFAOYSA-N oxybenzone Chemical compound OC1=CC(OC)=CC=C1C(=O)C1=CC=CC=C1 DXGLGDHPHMLXJC-UHFFFAOYSA-N 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
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- 229910052698 phosphorus Inorganic materials 0.000 description 1
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- 238000002360 preparation method Methods 0.000 description 1
- QLNJFJADRCOGBJ-UHFFFAOYSA-N propionamide Chemical compound CCC(N)=O QLNJFJADRCOGBJ-UHFFFAOYSA-N 0.000 description 1
- 229940080818 propionamide Drugs 0.000 description 1
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- 229910052717 sulfur Inorganic materials 0.000 description 1
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- WYKYCHHWIJXDAO-UHFFFAOYSA-N tert-butyl 2-ethylhexaneperoxoate Chemical compound CCCCC(CC)C(=O)OOC(C)(C)C WYKYCHHWIJXDAO-UHFFFAOYSA-N 0.000 description 1
- JZFHXRUVMKEOFG-UHFFFAOYSA-N tert-butyl dodecaneperoxoate Chemical compound CCCCCCCCCCCC(=O)OOC(C)(C)C JZFHXRUVMKEOFG-UHFFFAOYSA-N 0.000 description 1
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Landscapes
- Joining Of Glass To Other Materials (AREA)
Description
【0001】
【発明の属する技術分野】
本発明は、合わせガラス、特に自動車、航空機等のウインドウ用ガラス、建築物の窓ガラス等に用いる合わせガラスの製造方法に関する。
【0002】
【従来の技術】
自動車、航空機等のウインドウ用ガラス、建築物の窓ガラス等には、従来から合わせガラスが広く用いられている。合わせガラスは、通常2枚の透明基材の間に樹脂膜(中間膜)が挟持されており、衝撃等に対して高い安全性を有することから、上記のような用途で安全ガラスとして使用されている。
【0003】
合わせガラスは、外部から衝撃が加えられた場合に、ガラスの部分は破損するが、透明基材間の中間膜は、容易には破損されないため、破損したガラスは中間膜に貼着されたままで、ガラスの破片が周囲に飛散することはほとんどない。
【0004】
合わせガラスが、上記のような安全ガラスとしての機能を発揮するには、透明基材と中間膜の接着力をある範囲に調整することが必要である。透明基材と中間膜との接着力が小さい場合は、外部からの衝撃により破損した透明基材が中間膜から剥がれて飛散しやすく、一方、接着力が大きい場合は透明基材と中間膜が衝撃と同時に共に破損して、破片が飛散してしまう。
【0005】
ところで、合わせガラスを、熱可塑性のエチレン−酢酸ビニル(EVA)を中間膜として使用して製造する場合、従来においては、EVAを含む樹脂組成物を2枚の透明基材に挟持させた状態で真空袋に投入し、脱気しながら加熱して仮圧着を行った後、又は仮圧着を行いながら、オートクレーブでEVAを本架橋するという方法で行われている(例えば、特許文献1参照。)。そして、一般的に使用されている低MFRタイプ(MFRが15g/10分以下)の中間膜の仮圧着は、中間膜温度が溶融温度(JIS K 6924−2)(Tm)以上になるまで加熱しながら脱気するという条件で行われている。
【0006】
このような合わせガラスの製造方法を、MFRが15g/10分以上の樹脂に適用し、仮圧着する場合、溶融温度(JIS K 6924−2)(Tm)以上で行うと、溶融した樹脂が合わせガラスの縁部よりはみ出し、後工程でトリミング処理が必要になったり、また、合わせガラス自身の端部に加工歪みが残り、透視不良や施工時に割れが発生したりするという問題があった。
【0007】
【特許文献1】
特開平11−35349号公報
【0008】
【発明が解決しようとする課題】
本発明は、上記従来の事情に鑑みなされたものであり、以下の目的を達成することを課題とする。即ち、
本発明の目的は、MFRが30g/10分以上の樹脂を中間膜として使用した場合であっても、加工歪みが少なく優れた透視性を有する合わせガラスを製造可能な合わせガラスの製造方法を提供することにある。
【0009】
【課題を解決するための手段】
本発明者らは、合わせガラスにおいてMFRが30g/10分以上の樹脂を中間膜に用いた場合であっても、仮圧着時の温度を所定の範囲内に設定することにより加工歪みの発生が少ない合わせガラスが得られることを見出し、本発明を想到するに至った。
なお、字義からは、本発明の合わせガラス は、「合わせ透明基材」と呼ぶべきであるが、「合わせガラス」の語は、材質をいうものではなく、2枚の透明基材に中間膜を挟持してなるものを呼ぶものとして「合わせガラス」の語を用いる。
上記課題を解決する手段は以下の通りである。即ち、
本発明の合わせガラスの製造方法は、メルトフローレートが30g/10分以上の樹脂を含む樹脂組成物を2枚の透明基材に挟持させ、仮圧着を行った後に、又は仮圧着を行いながら、前記樹脂組成物を加熱硬化させて中間膜を形成する工程を有する合わせガラスの製造方法であって、前記仮圧着時における樹脂組成物の温度を、前記樹脂の溶融温度(JIS K 6924−2)をTm(℃)としたとき、Tm−15〜Tm−5(℃)の範囲内とすることを特徴としている。
前記樹脂としては、エチレン−酢酸ビニル樹脂を使用することが好ましい。
【0010】
【発明の実施の形態】
本発明の合わせガラスの製造方法は、メルトフローレートが30g/10分以上の樹脂を含む樹脂組成物を2枚の透明基材に挟持させ、仮圧着を行った後に、又は仮圧着を行いながら、前記樹脂組成物を加熱硬化させて中間膜を形成する工程を有する合わせガラスの製造方法であって、前記仮圧着時における前記樹脂組成物の温度を、前記樹脂の溶融温度(JIS K 6924−2)をTm(℃)としたとき、Tm−15〜Tm−5(℃)の範囲内とすることを特徴としている。
以下、先ず、本発明によって得られる合わせガラスについて説明する。
【0011】
<合わせガラス>
[樹脂組成物]
(樹脂)
前記樹脂としては、本発明においては、MFRが30g/10分以上の樹脂を使用する。該MFRが30〜50g/10分の樹脂を用いることが好ましく、30g/10分の樹脂を使用することがさらに好ましい。
また、本発明は、MFRが30g/10分以上の樹脂を対象にしており、MFRが30g/10分未満の樹脂は、本発明の目的を逸脱してしまう。
【0012】
このような本発明において使用する樹脂としては、エチレン−酢酸ビニル樹脂(以下、「EVA」という場合がある。)、ウレタン樹脂、ポリビニルアセタール樹脂、塩化ビニル樹脂、シリコーン樹脂、エチレン−エチルアクリレート樹脂等、従来から合わせガラスの中間膜として用いられている樹脂が挙げられ、中でも、エチレン−酢酸ビニル樹脂が好ましい。
【0013】
本発明において、樹脂としてEVAを使用する場合、EVA中の酢酸ビニルの含有量は、20〜50質量%であることが好ましく、26〜40質量%であることがより好ましい。酢酸ビニルの含有量を、20〜50質量%とすることにより、中間膜の透明性が十分で、耐貫通性、貯蔵性を良好にすることができる。
【0014】
[架橋剤]
本発明においては、樹脂組成物中のエチレン−酢酸ビニル樹脂を硬化させるための架橋剤として、有機過酸化物又は光開始剤を用いることが好ましい。有機過酸化物としては、樹脂の加工温度・貯蔵安定性の観点から例えば、ベンゾイルパーオキサイド系硬化剤、tert−ヘキシルパーオキシピバレート、tert−ブチルパーオキシピバレート、3,5,5−トリメチルヘキサノイルパーオキサイド、ジ−n−オクタノイルパーオキサイド、ラウロイルパーオキサイド、ステアロイルパーオキサイド、1,1,3,3−テトラメチルブチルパーオキシ−2−エチルヘキサノエート、スクシニックアシドパーオキサイド、2,5−ジメチル−2,5−ジ(2−エチルヘキサノイルパーオキシ)ヘキサン、1−シクロヘキシル−1−メチルエチルパーオキシ−2−エチルヘキサノエート、tert−ヘキシルパーオキシ−2−エチルヘキサノエート、4−メチルベンゾイルパーオキサイド、tert−ブチルパーオキシ−2−エチルヘキサノエート、m−トルオイル+ベンゾイルパーオキサイド、ベンゾイルパーオキサイド、1,1−ビス(tert−ブチルパーオキシ)−2−メチルシクロヘキサネート、1,1−ビス(tert−ヘキシルパーオキシ)−3,3,5−トリメチルシクロヘキサネート、1,1−ビス(tert−ヘキシルパーオキシ)シクロヘキサネート、1,1−ビス(tert−ブチルパーオキサシ)−3,3,5−トリメチルシクロヘキサネート、1,1−ビス(tert−ブチルパーオキシ)シクロヘキサネート、2,2−ビス(4,4−ジ−tert−ブチルパーオキシシクロヘキシル)プロパン、1,1−ビス(tert−ブチルパーオキシ)シクロドデカン、tert−ヘキシルパーオキシイソプロピルモノカーボネート、tert−ブチルパーオキシマレイックアシド、tert−ブチルパーオキシ−3,3,5−トリメチルヘキサノエート、tert−ブチルパーオキシラウレート、2,5−ジメチル−2,5−ジ(メチルベンゾイルパーオキシ)ヘキサン、tert−ブチルパーオキシイソプロピルモノカーボネート、tert−ブチルパーオキシ−2−エチルヘキシルモノカーボネート、tert−ヘキシルパーオキシベンゾエート、2,5−ジ−メチル−2,5−ジ(ベンゾイルパーオキシ)ヘキサン、等が挙げられる。
【0015】
特に好ましいのは、ベンゾイルパーオキサイド系硬膜剤、ジ−n−オクタノイルパーオキサイド、ラウロイルパーオキサイド、ステアロイルパーオキサイド、1,1,3,3−テトラメチルブチルパーオキシ−2−エチルヘキサノエート、スクシニックアシドパーオキサイド、2,5−ジメチル−2,5−ジ(2−エチルヘキサノイルパーオキシ)ヘキサン、1−シクロヘキシル−1−メチルエチルパーオキシ−2−エチルヘキサノエート、tert−ヘキシルパーオキシ−2−エチルヘキサノエート、4−メチルベンゾイルパーオキサイド、tert−ブチルパーオキシ−2−エチルヘキサノエート、m−トルオイル+ベンゾイルパーオキサイド、ベンゾイルパーオキサイド、1,1−ビス(tert−ブチルパーオキシ)−2−メチルシクロヘキサネート、1,1−ビス(tert−ヘキシルパーオキシ)−3,3,5−トリメチルシクロヘキサネート、1,1−ビス(tert−ヘキシルパーオキシ)シクロヘキサネート、1,1−ビス(tert−ブチルパーオキサシ)−3,3,5−トリメチルシクロヘキサネート、1,1−ビス(tert−ブチルパーオキシ)シクロヘキサネート、2,2−ビス(4,4−ジ−tert−ブチルパーオキシシクロヘキシル)プロパン、1,1−ビス(tert−ブチルパーオキシ)シクロドデカン、tert−ヘキシルパーオキシイソプロピルモノカーボネートである。
上記ベンゾイルパーオキサイド系硬化剤としては、70℃以上の温度で分解してラジカルを発生するものであればいずれも使用可能であるが、半減期10時間の分解温度が50℃以上のものが好ましく、調製条件、成膜温度、硬化(貼り合わせ)温度、被着体の耐熱性、貯蔵安定性を考慮して適宜選択できる。
【0016】
使用可能なベンゾイルパーオキサイド系硬化剤としては、例えば、ベンゾイルパーオキサイド、2,5−ジメチルヘキシル−2,5−ビスパーオキシベンゾエート、p−クロロベンゾイルパーオキサイド、m−トルオイルパーオキサイド、2,4−ジクロロベンゾイルパーオキサイド、t−ブチルパーオキシベンゾエート等が挙げられる。ベンゾイルパーオキサイド系硬化剤は1種でも2種以上を組み合わせて使用してもよく、その配合量は、エチレン−酢酸ビニル樹脂100質量部に対して0.1〜5質量部であることが好ましい。また、上記で例示したもの以外のパーオキサイドと混合して用いることも可能である。
【0017】
また、光開始剤としては、公知のどのような光開始剤でも使用することができるが、配合後の貯蔵安定性の良いものが望ましい。このような光開始剤としては、例えば、2−ヒドロキシ−2−メチル−1−フェニルプロパン−1−オン、1−ヒドロキシシクロヘキシルフェニルケトン、2−メチル−1−(4−(メチルチオ)フェニル)−2−モルホリノプロパン−1などのアセトフェノン系、ベンジルジメチルケタ−ルなどのベンゾイン系、ベンゾフェノン、4−フェニルベンゾフェノン、ヒドロキシベンゾフェノンなどのベンゾフェノン系、イソプロピルチオキサントン、2−4−ジエチルチオキサントンなどのチオキサントン系、その他特殊なものとしては、メチルフェニルグリオキシレ−トなどが使用できる。特に好ましくは、2−ヒドロキシ−2−メチル−1−フェニルプロパン−1−オン、1−ヒドロキシシクロヘキシルフェニルケトン、2−メチル−1−(4−(メチルチオ)フェニル)−2−モルホリノプロパン−1、ベンゾフェノン等が挙げられる。これら光開始剤は、必要に応じて、4−ジメチルアミノ安息香酸のごとき安息香酸系又は、第3級アミン系などの公知慣用の光重合促進剤の1種または2種以上を任意の割合で混合して使用することができる。また、光開始剤のみの1種単独または2種以上の混合で使用することができる。
また、光開始剤の配合量は、エチレン−酢酸ビニル樹脂100質量部に対して0.5〜5.0質量部であることが好ましい。
【0018】
[官能性モノマー]
また更に、本発明においては、中間膜の種々の物性(機械的強度、接着性、透明性等の光学的特性、耐熱性、耐光性、架橋速度等)の改良又は調整、特に、機械的強度の改良のため、官能性モノマーを添加することが好ましい。1〜3個の官能基を有する官能性モノマーとしては、アクリロキシ基、メタクリロキシ基又はアリル基を有する化合物が挙げられる。
【0019】
該当する化合物としては、アクリル酸あるいはメタクリル酸誘導体、例えばそのエステルやアミドが最も一般的である。この場合、エステル残基としては、メチル、エチル、ドデシル、ステアリル、ラウリルのようなアルキル基の他に、シクロヘキシル基、テトラヒドロフルフリル基、アミノエチル基、2−ヒドロエチル基、3−ヒドロキシプロピル基、3−クロロ−2−ヒドロキシプロピル基等が挙げられる。また、アクリル酸又はメタクリル酸とエチレングリコール、トリエチレングリコール、ポリエチレングリコール、グリセリン、トリメチロールプロパン、ペンタエリスリトール等の多官能アルコールとのエステルも同様に用いられる。アミドとしては、アクリルアミドが代表的である。また、アリル基含有化合物としては、ジアリルフタレート、トリアリルシアヌレート、トリアリルイソシアヌレート、フタル酸ジアリル、イソフタル酸ジアリル、マレイン酸ジアリル等が挙げられ、これらの1種又は2種以上の混合物が、エチレン−酢酸ビニル樹脂100質量部に対し、0.1〜50質量部、好ましくは0.5〜30質量部添加して用いられる。0.1質量部未満であると前記機械的強度向上という改良効果を低下させることがあり、50質量部を超えると接着剤の調製時の作業性や製膜製を低下させることがある。配合量を0.1〜50質量部とすることにより、中間膜の物性(機械的強度、接着性、光学特性、耐熱性、耐光性等)が十分に発現するとともに、樹脂組成物の調製時の作業性や中間膜の成膜性が良好となり好ましい。
【0020】
アクリル酸又はメタクリル酸のエステルのエステル残基の例としては、メチル基、エチル基、ドデシル基、ステアリル基、ラウリル基等の直鎖状のアルキル基、シクロヘキシル基、テトラヒドロフルフリル基、アミノエチル基、2−ヒドロキシエチル基、3−ヒドロキシプロピル基、3−クロロ−2−ヒドロキシプロピル基等を挙げることができる。
【0021】
また、グリセリン、エチレングリコール、トリエチレングリコール、ポリプロピレングリコール、ポリエチレングリコール、トリメチロールプロパン、ペンタエリスリトール等の多価アルコール1分子とアクリル酸又はメタクリル酸1分子又は2分子以上とがエステル化したエステルを挙げることもできる。
【0022】
本発明においては、前記官能性モノマーの中でも、特に、3官能モノマーを用いることが好ましい。3官能モノマーと、本発明に係るエチレン−酢酸ビニル樹脂とを併用することにより、透明性が向上し好ましい。該3官能モノマーとしては、トリメチロールプロパンメタクリレート、トリアリルイソシアヌレート、トリメチロールプロパントリアクリレート、トリアリルシアヌレート、等が挙げられ、中でも特に、トリメチロールプロパンメタクリレート、トリアリルイソシアヌレート、トリメチロールプロパントリアクリレート、トリアリルシアヌレートが好ましい。
【0023】
[紫外線吸収剤]
更に、本発明においては、ベンゾフェノン系紫外線吸収剤を配合することが好ましい。上記ベンゾフェノン系紫外線吸収剤としては、公知のベンゾフェノン系紫外線吸収剤を用いることができるが、例えば、2−ヒドロキシ−4−メトキシベンゾフェノン、2−ヒドロキシ−4−n−ドデシロキシベンゾフェノン、2,4−ジヒドロキシベンゾフェノン、2,2’−ジヒドロキシ−4−メトキシベンゾフェノン、2−ヒドロキシ−4−n−オクトキシベンゾフェノン等が好ましく挙げられる。なお、上記ベンゾフェノン系紫外線吸収剤の配合量は、樹脂100質量部に対して0.01〜5質量部であることが好ましい。
【0024】
[接着促進剤]
本発明においては、更に、接着促進剤を添加することが好ましい。
接着促進剤は、樹脂組成物の接着性を向上させるために添加することができ、従来公知のものを用いることが可能であるが、例えば、γ−クロロプロピルトリメトキシシラン、ビニルトリクロロシラン、ビニルトリエトキシシラン、ビニル−トリス(β−メトシキエトキシ)シラン、γ−メタクリロキシプロピルトリメトキシシラン、β−(3,4−エトキシシクロヘキシル)エチル−トリメトキシシラン、γ−グリシドキシプロピルトリメトキシシラン、ビニルトリアセトキシシラン、γ−メルカプトプロピルトリメトキシシラン、γ−アミノプロピルトリエトキシシラン、N−β−(アミノエチル)−γ−アミノプロピルトリメトキシシラン等のシランカップリング剤が好ましく挙げられる。
【0025】
なお、上記接着促進剤は、単独で使用しても、2種以上組み合わせて用いてもよく、その配合量は、樹脂100質量部に対して0.01〜5質量部であることが好ましい。
【0026】
[光安定剤]
また、本発明においては、耐光性の向上のために、光安定剤を添加することができる。光安定剤としてはヒンダードアミン系と呼ばれる光安定剤を用いることが好ましく、例えば、LA−52、LA−57、LA−62、LA−63LA―63p、LA−67、LA−68(いずれも旭電化(株)製)、Tinuvin744、Tinuvin 770、Tinuvin 765、Tinuvin144、Tinuvin 622LD、CHIMASSORB 944LD(いずれもチバ・ガイギー社製)、UV−3034(B.F.グッドリッチ社製)等を挙げることができる。なお、上記光安定剤は、単独で使用しても、2種以上組み合わせて用いてもよく、その配合量は、樹脂100質量部に対して0.01〜5質量部であることが好ましい。
【0027】
[その他の添加剤]
以上の添加剤のほか、本発明には、老化防止剤、タッキファイアー(松脂成分)、染料、加工助剤等を本発明の効果に支障をきたさない範囲で用いてもよい。
【0028】
前記老化防止剤としては、例えばN,Ν’−ヘキサン−1,6−ジイルビス〔3−(3,5−ジ−tert−ブチル−4−ヒドロキシフェニル)プロピオナミド〕等のヒンダードフェノール系酸化防止剤、リン系熱安定剤、ラクトン系熱安定剤、ビタミンE系熱安定剤、イオウ系熱安定剤等が挙げられる。
【0029】
<透明基材>
本発明の合わせガラスに用いる透明基材は、特に限定されないが、例えば無機ガラス板、無着色透明ガラス板、或いは剛性の高い有機高分子板を用いてもよい。剛性の高い有機高分子板としては、ポリカーボネート板、アクリル板等が挙げられる。貼着時の加熱温度等を鑑みると無機ガラス板、無着色透明ガラス板が好ましい。
【0030】
本発明の合わせガラスの層構成としては、例えば、透明基材−中間膜−透明基材、透明基材−中間膜−ポリカーボネート−中間膜−透明基材とすることができる。
【0031】
<合わせガラスの製造方法>
本発明の合わせガラスの製造方法は、上述のMFRが30g/10分以上の樹脂を含む樹脂組成物の各成分をロールミル等にて十分に混和し、例えば、通常の押出成形、カレンダー成形等により成形して得たシート、又は樹脂組成物を溶剤に溶解させ、この溶液を適当な塗布機(コーター)で適当な支持体上に塗布、乾燥して得た塗膜状のシート等を2枚の透明基材間に挟み込み、真空脱気により中間膜と透明基材との間の空気を脱気し、加熱下で仮圧着する。このときの温度は、前記樹脂の溶融温度(JIS K 6924−2)をTm(℃)としたとき、Tm−15〜Tm−5(℃)の範囲内とする。更に、オートクレーブ中で加圧加熱処理して、樹脂層を架橋硬化させることにより中間膜を形成することができるが、上記樹脂組成物の硬化温度を120℃以下、特に70〜120℃、とりわけ80〜110℃とすることが好ましい。硬化温度を120℃以下とすることにより、反りや剥離が発生を低減することができる。なお、上記加圧加熱硬化処理は、仮圧着を行いながら実行してもよい。
【0032】
本発明の合わせガラスの製造方法においては、仮圧着時の温度を上記範囲内とすることにより、MFRが30g/10分以上の樹脂を用いた場合であっても、加工歪みの発生が少ない合わせガラスを得ることができる。
【0033】
本発明においては、仮圧着時の温度がTm−15(℃)未満であると、十分に仮圧着することができず、Tm−5(℃)を超えると、ガラスの縁部から樹脂がはみ出し、端部が歪み透視不良や端部剥離が発生する。また、特に、仮圧着時の温度をTm−15〜Tm−5(℃)とすると、板厚偏差が1%未満となり好ましい。
【0034】
また、仮圧着時に、端部が均一に溶融されるには、前記温度とするための昇温速度としては、10℃/分以下とすることが好ましく、2〜7℃/分とすることがより好ましく、5℃/分以下とすることがさらに好ましい。
【0035】
以上示した仮圧着は、樹脂組成物を挟持した2枚の透明基材を真空脱気、加熱することにより行ったが、本発明はそれに限定されず、例えば、真空脱気を行いながら加熱硬化させることにより仮圧着を行ってもよい。
【0036】
前記加圧加熱処理における、加圧の圧力としては、5×105Pa程度とすることが好ましい。
【0037】
なお、合わせガラスの透明基材表面には、金属及び/又は金属酸化物からなる透明の導電層を設けてもよい。
【0038】
【実施例】
以下、実施例及び比較例を挙げて本発明を具体的に説明するが、本発明は下記実施例に限定されるものではない。
【0039】
[実施例1〜5、参考例1〜5、比較例1〜3]
以下に示す配合成分をロールミルにて55℃で混練して樹脂組成物を調製し、得られた組成物を2枚のPETフィルムの間に挟んで70℃、10分の条件でプレス成形し、放冷後、PETフィルムを剥がして厚さ0.4mmのシートを得た。以上の工程を4回繰り返し行い4枚のシートを得た。
(樹脂組成物成分)
エチレン−酢酸ビニル樹脂 100質量部
(750R、東ソー(株)製、溶融温度(Tm):66℃、酢酸ビニル含有量:32%、MFR:30g/10分)
ベンゾイルパーオキサイド(ナイパーFF、日本油脂(株)製) 3.0質量部
トリアリルイソシアヌレート(TAIC、日本化成(株)製) 2.0質量部
ベンゾフェノン系紫外線吸収剤 0.1質量部
(スミソルブ130、住友化学工業(株)製)
γ−メタクリロキシプロピルトリメトキシシラン 1.0質量部
(KBM503、信越化学工業(株)製)
リン酸エステルポリマー 0.001質量部
(LTP−2、川研ファインケミカル(株)製)
【0040】
次に、洗浄乾燥した300mm×300mm×2.8mmの2枚のガラス板の間に上記シート4枚を挟み、これをゴム袋に入れて真空ポンプを稼動させて真空脱気し、各実施例及び比較例毎に表1〜2に示す炉内温度のオーブンに投入し仮圧着を行った。次いで、表1〜2に示す時間後、真空ポンプを停止しサンプルを取り出した。このときの中間膜の温度は表1〜2に示す通りであった。さらに、サンプルの4つの頂点近傍(頂点より中心へ25mmの位置)の厚み、及び中心部近傍(サンプルの一辺中央から100mmの位置)4点の厚みを測定した。そして、各頂点近傍の4箇所の厚みの平均と中心部近傍の4箇所の厚みの平均とを求めた。更に、これをオートクレーブに入れ、圧力4.9×105Pa、温度100℃の条件で30分間加圧加熱処理して、合わせガラスを得た。
【0041】
[評価]
(1)エッジ状態
得られた合わせガラスの縁部の中間膜のはみ出し状態を目視評価した。はみ出しがなかった場合を「良好」、はみ出しがあったが場合を「はみ出し」、シールしなかった場合を「シールせず」として評価した。評価結果を表1〜2に示す。
(2)シボ残存率
シボ残り度と面積の積によりシボ残存率を算出した。シボ残り度は、ヘイズ値60以上を1、同40〜60を2/3、同20〜40を1/3、同0〜20を0の4段階評価した。サンプル全体の面積を10として、評価水準毎に面積を求めた。なお、シボ残存率は下記式により求められる。
シボ残存率=1×S1+2/3×S2/3+1/3×S1/3+0×S0
算出結果を表1〜2に示す。シボ残存率は5以下が好ましく、6以上であると加圧加熱後もエアが残る可能性がある。
(3)中央膜温度
仮圧着後にオーブンから取り出した合わせガラスの中間膜に、熱電対をその先端が中心部に位置するように刺し込み、中間膜の中央部の温度を測定した。測定結果を表1〜2に示す。
【0042】
【表1】
【0043】
【表2】
【0044】
表1〜2より、実施例1〜5では、板厚偏差及びシボ残存率が小さく加工歪みが少ない合わせガラスを製造することができたことが分かる。Tm−15〜Tm−5℃の範囲内の実施例1〜5は、エッジ状態が良好であり、かつ板厚偏差が0.1%以内であり、加工歪みが少ない合わせガラスを製造することができた。
これに対し、比較例1〜4では、仮圧着できなかったか、あるいはエッジ状態が不良で実用的な合わせガラスを製造することができなかった。
【0045】
【発明の効果】
本発明によれば、MFRが30g/10分以上の樹脂を中間膜として使用した場合であっても、加工歪みが少なく優れた透視性を有する合わせガラスを製造可能な合わせガラスの製造方法を提供することができる。 [0001]
BACKGROUND OF THE INVENTION
The present invention, laminated glass, in particular an automobile, window glass such as aircraft, to glass manufacturing method of combined use in window glass of buildings.
[0002]
[Prior art]
Conventionally, laminated glass has been widely used for window glass for automobiles, aircraft, etc., and window glass for buildings. Laminated glass usually has a resin film (intermediate film) sandwiched between two transparent substrates and has high safety against impacts, etc., so it is used as a safety glass in the above applications. ing.
[0003]
In the case of laminated glass, when an impact is applied from the outside, the glass portion is damaged, but the interlayer film between the transparent substrates is not easily damaged, so the broken glass remains adhered to the interlayer film. Glass fragments are rarely scattered around.
[0004]
In order for the laminated glass to exhibit the function as the safety glass as described above, it is necessary to adjust the adhesive force between the transparent substrate and the intermediate film within a certain range. When the adhesive strength between the transparent base material and the intermediate film is small, the transparent base material damaged by an external impact is easily peeled off from the intermediate film, while when the adhesive strength is large, the transparent base material and the intermediate film are At the same time as the impact, both are damaged and the fragments are scattered.
[0005]
By the way, when manufacturing laminated glass using thermoplastic ethylene-vinyl acetate (EVA) as an intermediate film, conventionally, in a state where a resin composition containing EVA is sandwiched between two transparent substrates. It is carried out by a method in which the EVA is subjected to temporary cross-linking after being put into a vacuum bag and heated while degassing, or while pre-pressure bonding is performed, and the EVA is fully cross-linked by an autoclave (see, for example, Patent Document 1). . In addition, the pre-bonding of a generally used low MFR type (MFR 15 g / 10 min or less) intermediate film is heated until the intermediate film temperature is equal to or higher than the melting temperature (JIS K 6924-2) (Tm). It is performed under the condition of degassing.
[0006]
When such a method for producing a laminated glass is applied to a resin having an MFR of 15 g / 10 min or more and temporarily press-bonded, if the melting temperature (JIS K 6924-2) (Tm) or higher is used, the molten resin is combined. There is a problem that it protrudes from the edge of the glass and a trimming process is required in a later process, and processing distortion remains at the end of the laminated glass itself, resulting in poor perspective and cracking during construction.
[0007]
[Patent Document 1]
Japanese Patent Laid-Open No. 11-35349
[Problems to be solved by the invention]
This invention is made | formed in view of the said conventional situation, and makes it a subject to achieve the following objectives. That is,
An object of the present invention is to provide a method for producing a laminated glass capable of producing a laminated glass having a small degree of processing distortion and excellent transparency even when a resin having an MFR of 30 g / 10 min or more is used as an intermediate film. It is to provide.
[0009]
[Means for Solving the Problems]
Even if the present inventors use a resin having an MFR of 30 g / 10 min or more for the interlayer film in the laminated glass, generation of processing distortion is caused by setting the temperature at the time of temporary press bonding within a predetermined range. The inventors have found that a small amount of laminated glass can be obtained, and have come up with the present invention.
In addition, from the meaning of the word, the laminated glass of the present invention should be called “laminated transparent base material”, but the term “laminated glass” does not refer to a material, but an intermediate film on two transparent base materials. The term “laminated glass” is used to refer to what is sandwiched between.
Means for solving the above problems are as follows. That is,
In the method for producing a laminated glass of the present invention, a resin composition containing a resin having a melt flow rate of 30 g / 10 min or more is sandwiched between two transparent substrates and temporarily bonded, or while performing temporary pressing. , A method for producing a laminated glass comprising a step of heat-curing the resin composition to form an intermediate film, wherein the temperature of the resin composition at the time of the temporary pressure bonding is set to a melting temperature of the resin (JIS K 6924-2). ) In the range of Tm-15 to Tm-5 (° C).
As the resin, it is preferable to use an ethylene-vinyl acetate resin.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
In the method for producing a laminated glass of the present invention, a resin composition containing a resin having a melt flow rate of 30 g / 10 min or more is sandwiched between two transparent substrates and temporarily bonded, or while performing temporary pressing. , A method for producing a laminated glass comprising a step of heat-curing the resin composition to form an intermediate film, wherein the temperature of the resin composition at the time of the temporary pressure bonding is set to a melting temperature of the resin (JIS K 6924- When 2) is Tm (° C.), it is characterized by being in the range of Tm-15 to Tm-5 (° C.).
Hereinafter, the laminated glass obtained by this invention is demonstrated first.
[0011]
<Laminated glass>
[Resin composition]
(resin)
In the present invention, a resin having an MFR of 30 g / 10 min or more is used as the resin. It is preferred that the MFR is used 30 to 50 g / 10 min the resin is more preferable to use a 3 0 g / 10 min the resin.
In addition, the present invention is directed to a resin having an MFR of 30 g / 10 min or more, and a resin having an MFR of less than 30 g / 10 min deviates from the object of the present invention.
[0012]
Examples of the resin used in the present invention include ethylene-vinyl acetate resin (hereinafter sometimes referred to as “EVA”), urethane resin, polyvinyl acetal resin, vinyl chloride resin, silicone resin, ethylene-ethyl acrylate resin, and the like. Examples of the resin conventionally used as an interlayer film for laminated glass include ethylene-vinyl acetate resin.
[0013]
In this invention, when using EVA as resin, it is preferable that content of vinyl acetate in EVA is 20-50 mass%, and it is more preferable that it is 26-40 mass%. By setting the content of vinyl acetate to 20 to 50% by mass, the transparency of the intermediate film is sufficient, and penetration resistance and storage properties can be improved.
[0014]
[Crosslinking agent]
In this invention, it is preferable to use an organic peroxide or a photoinitiator as a crosslinking agent for hardening the ethylene-vinyl acetate resin in a resin composition. Examples of the organic peroxide include, from the viewpoint of resin processing temperature and storage stability, for example, benzoyl peroxide curing agent, tert-hexyl peroxypivalate, tert-butyl peroxypivalate, 3,5,5-trimethyl. Hexanoyl peroxide, di-n-octanoyl peroxide, lauroyl peroxide, stearoyl peroxide, 1,1,3,3-tetramethylbutylperoxy-2-ethylhexanoate, succinic acid peroxide, 2 , 5-Dimethyl-2,5-di (2-ethylhexanoylperoxy) hexane, 1-cyclohexyl-1-methylethylperoxy-2-ethylhexanoate, tert-hexylperoxy-2-ethylhexanoate Ate, 4-methylbenzoyl peroxide, tert-butyl peroxide Ci-2-ethylhexanoate, m-toluoyl + benzoyl peroxide, benzoyl peroxide, 1,1-bis (tert-butylperoxy) -2-methylcyclohexanate, 1,1-bis (tert-hexyl) Peroxy) -3,3,5-trimethylcyclohexanate, 1,1-bis (tert-hexylperoxy) cyclohexanate, 1,1-bis (tert-butylperoxy) -3,3,5 -Trimethylcyclohexanate, 1,1-bis (tert-butylperoxy) cyclohexanate, 2,2-bis (4,4-di-tert-butylperoxycyclohexyl) propane, 1,1-bis (tert -Butylperoxy) cyclododecane, tert-hexylperoxyisopropyl monocarbonate, tert-butylperoxymaleic acid, tert -Butylperoxy-3,3,5-trimethylhexanoate, tert-butylperoxylaurate, 2,5-dimethyl-2,5-di (methylbenzoylperoxy) hexane, tert-butylperoxyisopropylmono Examples thereof include carbonate, tert-butylperoxy-2-ethylhexyl monocarbonate, tert-hexylperoxybenzoate, 2,5-di-methyl-2,5-di (benzoylperoxy) hexane, and the like.
[0015]
Particularly preferred are benzoyl peroxide hardeners, di-n-octanoyl peroxide, lauroyl peroxide, stearoyl peroxide, 1,1,3,3-tetramethylbutylperoxy-2-ethylhexanoate Succinic acid peroxide, 2,5-dimethyl-2,5-di (2-ethylhexanoylperoxy) hexane, 1-cyclohexyl-1-methylethylperoxy-2-ethylhexanoate, tert-hexyl Peroxy-2-ethylhexanoate, 4-methylbenzoyl peroxide, tert-butylperoxy-2-ethylhexanoate, m-toluoyl + benzoyl peroxide, benzoyl peroxide, 1,1-bis (tert- Butyl peroxy) -2-methylcyclohexanate 1,1-bis (tert-hexylperoxy) -3,3,5-trimethylcyclohexanate, 1,1-bis (tert-hexylperoxy) cyclohexanate, 1,1-bis (tert-butylperoxy) Oxasi) -3,3,5-trimethylcyclohexanate, 1,1-bis (tert-butylperoxy) cyclohexanate, 2,2-bis (4,4-di-tert-butylperoxycyclohexyl) Propane, 1,1-bis (tert-butylperoxy) cyclododecane, tert-hexylperoxyisopropyl monocarbonate.
As the benzoyl peroxide curing agent, any one can be used as long as it decomposes at a temperature of 70 ° C. or higher to generate radicals, but preferably has a decomposition temperature of 50 ° C. or higher with a half-life of 10 hours. The temperature can be appropriately selected in consideration of the preparation conditions, the film formation temperature, the curing (bonding) temperature, the heat resistance of the adherend, and the storage stability.
[0016]
Usable benzoyl peroxide curing agents include, for example, benzoyl peroxide, 2,5-dimethylhexyl-2,5-bisperoxybenzoate, p-chlorobenzoyl peroxide, m-toluoyl peroxide, 2, Examples include 4-dichlorobenzoyl peroxide and t-butyl peroxybenzoate. The benzoyl peroxide-based curing agent may be used alone or in combination of two or more, and the blending amount is preferably 0.1 to 5 parts by mass with respect to 100 parts by mass of the ethylene-vinyl acetate resin. . It is also possible to use a mixture with peroxides other than those exemplified above.
[0017]
As the photoinitiator, any known photoinitiator can be used, but a photoinitiator having good storage stability after blending is desirable. Examples of such a photoinitiator include 2-hydroxy-2-methyl-1-phenylpropan-1-one, 1-hydroxycyclohexyl phenyl ketone, and 2-methyl-1- (4- (methylthio) phenyl)- Acetophenones such as 2-morpholinopropane-1, benzoins such as benzyldimethylketal, benzophenones such as benzophenone, 4-phenylbenzophenone and hydroxybenzophenone, thioxanthones such as isopropylthioxanthone and 2-4-diethylthioxanthone, and others As a special one, methylphenylglyoxylate can be used. Particularly preferably, 2-hydroxy-2-methyl-1-phenylpropan-1-one, 1-hydroxycyclohexyl phenyl ketone, 2-methyl-1- (4- (methylthio) phenyl) -2-morpholinopropane-1, Examples include benzophenone. These photoinitiators are optionally mixed with one or two or more known and commonly used photopolymerization accelerators such as a benzoic acid type such as 4-dimethylaminobenzoic acid or a tertiary amine type. Can be used as a mixture. Moreover, it can be used individually by 1 type of only a photoinitiator, or 2 or more types of mixture.
Moreover, it is preferable that the compounding quantity of a photoinitiator is 0.5-5.0 mass parts with respect to 100 mass parts of ethylene-vinyl acetate resin.
[0018]
[Functional monomer]
Furthermore, in the present invention, improvement or adjustment of various physical properties of the interlayer film (optical properties such as mechanical strength, adhesiveness, transparency, heat resistance, light resistance, crosslinking speed, etc.), especially mechanical strength. In order to improve the above, it is preferable to add a functional monomer. Examples of the functional monomer having 1 to 3 functional groups include compounds having an acryloxy group, a methacryloxy group, or an allyl group.
[0019]
As such compounds, acrylic acid or methacrylic acid derivatives such as esters and amides are most common. In this case, as an ester residue, in addition to an alkyl group such as methyl, ethyl, dodecyl, stearyl, and lauryl, a cyclohexyl group, a tetrahydrofurfuryl group, an aminoethyl group, a 2-hydroethyl group, a 3-hydroxypropyl group, A 3-chloro-2-hydroxypropyl group and the like can be mentioned. In addition, esters of acrylic acid or methacrylic acid with polyfunctional alcohols such as ethylene glycol, triethylene glycol, polyethylene glycol, glycerin, trimethylolpropane, pentaerythritol are also used. A typical amide is acrylamide. Examples of the allyl group-containing compound include diallyl phthalate, triallyl cyanurate, triallyl isocyanurate, diallyl phthalate, diallyl isophthalate, diallyl maleate, and the like. 0.1 to 50 parts by mass, preferably 0.5 to 30 parts by mass is added to 100 parts by mass of the ethylene-vinyl acetate resin. If the amount is less than 0.1 parts by mass, the improvement effect of improving the mechanical strength may be reduced. If the amount exceeds 50 parts by mass, the workability at the time of preparing the adhesive and the film formation may be reduced. When the blending amount is 0.1 to 50 parts by mass, the physical properties (mechanical strength, adhesiveness, optical properties, heat resistance, light resistance, etc.) of the intermediate film are sufficiently expressed, and at the time of preparing the resin composition The workability and the film formability of the intermediate film are favorable, which is preferable.
[0020]
Examples of ester residues of esters of acrylic acid or methacrylic acid include linear alkyl groups such as methyl group, ethyl group, dodecyl group, stearyl group, lauryl group, cyclohexyl group, tetrahydrofurfuryl group, aminoethyl group , 2-hydroxyethyl group, 3-hydroxypropyl group, 3-chloro-2-hydroxypropyl group and the like.
[0021]
In addition, an ester obtained by esterifying one molecule of a polyhydric alcohol such as glycerin, ethylene glycol, triethylene glycol, polypropylene glycol, polyethylene glycol, trimethylolpropane, or pentaerythritol with one molecule or two or more molecules of acrylic acid or methacrylic acid. You can also.
[0022]
In the present invention, among the functional monomers, it is particularly preferable to use a trifunctional monomer. By using the trifunctional monomer in combination with the ethylene-vinyl acetate resin according to the present invention, transparency is preferably improved. Examples of the trifunctional monomer include trimethylol propane methacrylate, triallyl isocyanurate, trimethylol propane triacrylate, triallyl cyanurate, and the like, among others, trimethylol propane methacrylate, triallyl isocyanurate, trimethylol propane tri Acrylate and triallyl cyanurate are preferred.
[0023]
[Ultraviolet absorber]
Furthermore, in the present invention, it is preferable to blend a benzophenone ultraviolet absorber. As the benzophenone-based ultraviolet absorber, known benzophenone-based ultraviolet absorbers can be used. For example, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-n-dodecyloxybenzophenone, 2,4 Preferred are -dihydroxybenzophenone, 2,2'-dihydroxy-4-methoxybenzophenone, 2-hydroxy-4-n-octoxybenzophenone and the like. In addition, it is preferable that the compounding quantity of the said benzophenone series ultraviolet absorber is 0.01-5 mass parts with respect to 100 mass parts of resin.
[0024]
[Adhesion promoter]
In the present invention, it is preferable to add an adhesion promoter.
The adhesion promoter can be added to improve the adhesion of the resin composition, and conventionally known ones can be used. For example, γ-chloropropyltrimethoxysilane, vinyltrichlorosilane, vinyl Triethoxysilane, vinyl-tris (β-methoxyethoxy) silane, γ-methacryloxypropyltrimethoxysilane, β- (3,4-ethoxycyclohexyl) ethyl-trimethoxysilane, γ-glycidoxypropyltrimethoxysilane Silane coupling agents such as vinyltriacetoxysilane, γ-mercaptopropyltrimethoxysilane, γ-aminopropyltriethoxysilane, and N-β- (aminoethyl) -γ-aminopropyltrimethoxysilane are preferred.
[0025]
In addition, the said adhesion promoter may be used individually or may be used in combination of 2 or more types, and it is preferable that the compounding quantity is 0.01-5 mass parts with respect to 100 mass parts of resin.
[0026]
[Light stabilizer]
In the present invention, a light stabilizer can be added to improve light resistance. As the light stabilizer, a light stabilizer called a hindered amine type is preferably used. For example, LA-52, LA-57, LA-62, LA-63LA-63p, LA-67, LA-68 (all Asahi Denka) (Inc.), Tinuvin 744, Tinuvin 770, Tinuvin 765, Tinuvin 144, Tinuvin 622LD, CHIMASSORB 944LD (all manufactured by Ciba Geigy), UV-3034 (manufactured by BF Goodrich), and the like. . In addition, the said light stabilizer may be used individually or may be used in combination of 2 or more types, and it is preferable that the compounding quantity is 0.01-5 mass parts with respect to 100 mass parts of resin.
[0027]
[Other additives]
In addition to the above-mentioned additives, an antioxidant, a tackifier (pine resin component), a dye, a processing aid and the like may be used in the present invention as long as the effects of the present invention are not impaired.
[0028]
Examples of the antioxidant include hindered phenol antioxidants such as N, 例 え ば '-hexane-1,6-diylbis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionamide]. , Phosphorus heat stabilizers, lactone heat stabilizers, vitamin E heat stabilizers, sulfur heat stabilizers, and the like.
[0029]
<Transparent substrate>
Although the transparent base material used for the laminated glass of this invention is not specifically limited, For example, you may use an inorganic glass plate, a non-colored transparent glass plate, or a highly rigid organic polymer plate. Examples of the highly rigid organic polymer plate include a polycarbonate plate and an acrylic plate. In view of the heating temperature at the time of sticking, an inorganic glass plate and a non-colored transparent glass plate are preferable.
[0030]
As a laminated constitution of the laminated glass of this invention, it can be set as a transparent base material-intermediate film-transparent base material, a transparent base material-intermediate film-polycarbonate-intermediate film-transparent base material, for example.
[0031]
<Method for producing laminated glass>
In the method for producing a laminated glass of the present invention, each component of the resin composition containing a resin having an MFR of 30 g / 10 min or more is sufficiently mixed with a roll mill or the like, for example, ordinary extrusion molding, calendar molding, etc. A sheet obtained by molding by the above method, or a film-like sheet obtained by dissolving the resin composition in a solvent and coating and drying the solution on a suitable support with a suitable coating machine (coater). The sheet is sandwiched between transparent substrates, the air between the intermediate film and the transparent substrate is degassed by vacuum degassing, and is temporarily pressure-bonded under heating. The temperature at this time is in the range of Tm-15 to Tm- 5 (° C) when the melting temperature of the resin (JIS K 6924-2) is Tm (° C). Furthermore, an intermediate film can be formed by subjecting the resin layer to crosslinking and curing by pressure and heat treatment in an autoclave, but the curing temperature of the resin composition is 120 ° C. or less, particularly 70 to 120 ° C., especially 80 It is preferable to set it to -110 degreeC. By setting the curing temperature to 120 ° C. or lower, the occurrence of warping and peeling can be reduced. In addition, you may perform the said pressure heat hardening process, performing temporary crimping | compression-bonding.
[0032]
In the method for producing a laminated glass of the present invention, by causing the temperature at the time of provisional pressure bonding to be within the above range, even when a resin having an MFR of 30 g / 10 min or more is used, there is little generation of processing distortion. Laminated glass can be obtained.
[0033]
In the present invention, if the temperature at the time of temporary pressing is less than Tm-15 (° C.), sufficient temporary pressing cannot be performed, and if it exceeds Tm −5 (° C.), the resin protrudes from the edge of the glass. The end portion is distorted and see-through defect or end portion peeling occurs. In particular, when the temperature at the time of temporary pressure bonding is Tm-15 to Tm-5 (° C.), the thickness deviation is preferably less than 1%.
[0034]
Further, in order to uniformly melt the end portion at the time of provisional pressure bonding, the rate of temperature rise for the temperature is preferably 10 ° C./min or less, and preferably 2 to 7 ° C./min. More preferred is 5 ° C./min or less.
[0035]
The temporary bonding shown above was performed by vacuum degassing and heating two transparent substrates sandwiched with the resin composition. However, the present invention is not limited to this, for example, heat curing while performing vacuum degassing. You may perform temporary crimping | compression-bonding.
[0036]
The pressurizing pressure in the pressurizing heat treatment is preferably about 5 × 10 5 Pa.
[0037]
In addition, you may provide the transparent conductive layer which consists of a metal and / or a metal oxide in the transparent base material surface of a laminated glass.
[0038]
【Example】
EXAMPLES Hereinafter, although an Example and a comparative example are given and this invention is demonstrated concretely, this invention is not limited to the following Example.
[0039]
[Example 1-5, Reference Example 1-5, Comparative Examples 1-3]
The following ingredients are kneaded at 55 ° C. with a roll mill to prepare a resin composition, and the obtained composition is sandwiched between two PET films and press molded at 70 ° C. for 10 minutes. After standing to cool, the PET film was peeled off to obtain a sheet having a thickness of 0.4 mm. The above process was repeated 4 times to obtain 4 sheets.
(Resin composition component)
100 parts by mass of ethylene-vinyl acetate resin (750R, manufactured by Tosoh Corporation, melting temperature (Tm): 66 ° C., vinyl acetate content: 32%, MFR: 30 g / 10 min)
Benzoyl peroxide (Niper FF, manufactured by Nippon Oil & Fats Co., Ltd.) 3.0 parts by mass Triallyl isocyanurate (TAIC, manufactured by Nippon Kasei Co., Ltd.) 2.0 parts by mass Benzophenone UV absorber 0.1 parts by mass (Sumisolve) 130, manufactured by Sumitomo Chemical Co., Ltd.)
γ-Methacryloxypropyltrimethoxysilane 1.0 part by mass (KBM503, manufactured by Shin-Etsu Chemical Co., Ltd.)
0.001 part by mass of phosphoric acid ester polymer (LTP-2, manufactured by Kawaken Fine Chemical Co., Ltd.)
[0040]
Next, the above four sheets are sandwiched between two glass plates of 300 mm × 300 mm × 2.8 mm that have been washed and dried, put in a rubber bag, and vacuum degassed by operating a vacuum pump. Each example was placed in an oven having a furnace temperature shown in Tables 1 and 2 and temporarily bonded. Subsequently, after the time shown in Tables 1-2, the vacuum pump was stopped and the sample was taken out. The temperature of the intermediate film at this time was as shown in Tables 1-2. Furthermore, the thickness of 4 points | pieces vicinity (position of 25 mm to the center from a vertex) of a sample and the thickness of 4 points | pieces vicinity (position of 100 mm from the one-side center of a sample) were measured. And the average of the thickness of four places near each vertex and the average of the thickness of four places near the center part were calculated | required. Furthermore, this was put into an autoclave and subjected to pressure and heat treatment for 30 minutes under the conditions of a pressure of 4.9 × 10 5 Pa and a temperature of 100 ° C. to obtain a laminated glass.
[0041]
[Evaluation]
(1) Edge state The protruding state of the intermediate film at the edge of the obtained laminated glass was visually evaluated. The case where there was no protrusion was evaluated as “good”, the case where there was an protrusion was evaluated as “extruding”, and the case where no sealing was performed was evaluated as “not sealed”. The evaluation results are shown in Tables 1-2.
(2) Wrinkle remaining rate The wrinkle remaining rate was calculated by the product of the wrinkle remaining rate and the area. The degree of remaining wrinkle was evaluated on a four-point scale, with a haze value of 60 or more being 1, 2 to 40 to 60, 1/3 to 20 to 40, and 0 to 0 to 20. The area of the entire sample was set to 10, and the area was obtained for each evaluation level. In addition, the wrinkle residual rate is calculated | required by a following formula.
Wrinkle remaining rate = 1 × S 1 + 2/3 × S 2/3 + 1/3 × S 1/3 + 0 × S 0
The calculation results are shown in Tables 1-2. The wrinkle remaining rate is preferably 5 or less, and if it is 6 or more, air may remain even after pressure heating.
(3) Center film temperature A thermocouple was inserted into the intermediate film of the laminated glass taken out from the oven after the temporary pressure bonding so that the tip thereof was positioned at the center, and the temperature at the center of the intermediate film was measured. The measurement results are shown in Tables 1-2.
[0042]
[Table 1]
[0043]
[Table 2]
[0044]
From Tables 1-2, in Examples 1-5 , it turns out that the laminated glass with a small board | plate thickness deviation and a wrinkle residual ratio, and few processing distortions was able to be manufactured . Examples 1 5 in the range of T m-15~Tm-5 ℃ the edge state is good, and thickness deviation is within 0.1%, to produce a laminated glass working strain is small I was able to.
On the other hand, in Comparative Examples 1 to 4, provisional pressure bonding could not be performed, or a practical laminated glass could not be manufactured due to a poor edge state.
[0045]
【The invention's effect】
According to the present invention, there is provided a method for producing a laminated glass capable of producing a laminated glass having an excellent transparency with little processing distortion even when a resin having an MFR of 30 g / 10 min or more is used as an intermediate film. it can be.
Claims (2)
前記仮圧着時における樹脂組成物の温度を、前記樹脂の溶融温度(JIS K 6924−2)をTm(℃)としたとき、Tm−15〜Tm−5(℃)の範囲内とすることを特徴とする合わせガラスの製造方法。A resin composition containing a resin having a melt flow rate of 30 g / 10 min or more is sandwiched between two transparent substrates, and after the temporary pressure bonding or while performing the temporary pressure bonding, the resin composition is heated and cured. A method for producing a laminated glass having a step of forming an intermediate film,
The temperature of the resin composition at the time of the temporary pressure bonding is set within a range of Tm-15 to Tm-5 (° C.) when the melting temperature of the resin (JIS K 6924-2) is Tm (° C.). A method for producing a laminated glass.
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KR101486601B1 (en) | 2007-03-12 | 2015-01-26 | 아사히 가라스 가부시키가이샤 | Glass substrate provided with protection glass and method for manufacturing display device using glass substrate provided with protection glass |
KR101463640B1 (en) * | 2007-07-30 | 2014-11-19 | 아사히 가라스 가부시키가이샤 | Curable resin composition, transparent laminate using the same, and manufacturing method thereof |
JP4992806B2 (en) * | 2008-04-15 | 2012-08-08 | セントラル硝子株式会社 | Laminated glass manufacturing method and laminated glass |
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