JP4725027B2 - ポリブチレンテレフタレート - Google Patents
ポリブチレンテレフタレート Download PDFInfo
- Publication number
- JP4725027B2 JP4725027B2 JP2004112400A JP2004112400A JP4725027B2 JP 4725027 B2 JP4725027 B2 JP 4725027B2 JP 2004112400 A JP2004112400 A JP 2004112400A JP 2004112400 A JP2004112400 A JP 2004112400A JP 4725027 B2 JP4725027 B2 JP 4725027B2
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- reaction
- polybutylene terephthalate
- acid
- pbt
- 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 - Lifetime
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- 229920001707 polybutylene terephthalate Polymers 0.000 title claims description 88
- -1 Polybutylene terephthalate Polymers 0.000 title claims description 45
- 238000000034 method Methods 0.000 claims description 44
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 38
- 239000010936 titanium Substances 0.000 claims description 31
- 229910052719 titanium Inorganic materials 0.000 claims description 30
- 238000006116 polymerization reaction Methods 0.000 claims description 26
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims description 22
- 238000002425 crystallisation Methods 0.000 claims description 15
- 230000008025 crystallization Effects 0.000 claims description 15
- 239000007790 solid phase Substances 0.000 claims description 14
- 238000006460 hydrolysis reaction Methods 0.000 claims description 13
- QPFMBZIOSGYJDE-UHFFFAOYSA-N 1,1,2,2-tetrachloroethane Chemical compound ClC(Cl)C(Cl)Cl QPFMBZIOSGYJDE-UHFFFAOYSA-N 0.000 claims description 10
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 9
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 7
- 239000012046 mixed solvent Substances 0.000 claims description 7
- 230000003247 decreasing effect Effects 0.000 claims description 4
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 claims 1
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 claims 1
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical group OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 description 114
- 238000006068 polycondensation reaction Methods 0.000 description 64
- 238000006243 chemical reaction Methods 0.000 description 58
- 239000003054 catalyst Substances 0.000 description 39
- 238000005886 esterification reaction Methods 0.000 description 33
- 238000000605 extraction Methods 0.000 description 33
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 32
- 238000005809 transesterification reaction Methods 0.000 description 31
- 239000000243 solution Substances 0.000 description 29
- KKEYFWRCBNTPAC-UHFFFAOYSA-N terephthalic acid group Chemical group C(C1=CC=C(C(=O)O)C=C1)(=O)O KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 28
- 229920000642 polymer Polymers 0.000 description 23
- 238000003756 stirring Methods 0.000 description 23
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- 239000000835 fiber Substances 0.000 description 18
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 18
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 14
- 239000007789 gas Substances 0.000 description 14
- 238000009835 boiling Methods 0.000 description 13
- 239000012071 phase Substances 0.000 description 13
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 12
- 229910052751 metal Inorganic materials 0.000 description 12
- 239000002184 metal Substances 0.000 description 12
- 239000012295 chemical reaction liquid Substances 0.000 description 11
- 239000007788 liquid Substances 0.000 description 11
- WOZVHXUHUFLZGK-UHFFFAOYSA-N dimethyl terephthalate Chemical compound COC(=O)C1=CC=C(C(=O)OC)C=C1 WOZVHXUHUFLZGK-UHFFFAOYSA-N 0.000 description 10
- 241000251468 Actinopterygii Species 0.000 description 9
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 9
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 9
- 239000002253 acid Substances 0.000 description 9
- 239000008188 pellet Substances 0.000 description 9
- 239000012763 reinforcing filler Substances 0.000 description 9
- 229920005989 resin Polymers 0.000 description 9
- 239000011347 resin Substances 0.000 description 9
- KKEYFWRCBNTPAC-UHFFFAOYSA-L terephthalate(2-) Chemical compound [O-]C(=O)C1=CC=C(C([O-])=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-L 0.000 description 9
- 239000007791 liquid phase Substances 0.000 description 8
- 238000002156 mixing Methods 0.000 description 8
- 229910052757 nitrogen Inorganic materials 0.000 description 8
- YHWCPXVTRSHPNY-UHFFFAOYSA-N butan-1-olate;titanium(4+) Chemical compound [Ti+4].CCCC[O-].CCCC[O-].CCCC[O-].CCCC[O-] YHWCPXVTRSHPNY-UHFFFAOYSA-N 0.000 description 7
- 230000032050 esterification Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- 125000001160 methoxycarbonyl group Chemical group [H]C([H])([H])OC(*)=O 0.000 description 7
- WVDDGKGOMKODPV-UHFFFAOYSA-N Benzyl alcohol Chemical compound OCC1=CC=CC=C1 WVDDGKGOMKODPV-UHFFFAOYSA-N 0.000 description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 6
- HEDRZPFGACZZDS-MICDWDOJSA-N Trichloro(2H)methane Chemical compound [2H]C(Cl)(Cl)Cl HEDRZPFGACZZDS-MICDWDOJSA-N 0.000 description 6
- 238000011156 evaluation Methods 0.000 description 6
- 238000001125 extrusion Methods 0.000 description 6
- 239000002002 slurry Substances 0.000 description 6
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 5
- 239000000654 additive Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000007062 hydrolysis Effects 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 239000002904 solvent Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 239000012974 tin catalyst Substances 0.000 description 5
- 238000005160 1H NMR spectroscopy Methods 0.000 description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 4
- ADCOVFLJGNWWNZ-UHFFFAOYSA-N antimony trioxide Chemical compound O=[Sb]O[Sb]=O ADCOVFLJGNWWNZ-UHFFFAOYSA-N 0.000 description 4
- 230000003197 catalytic effect Effects 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 150000002009 diols Chemical class 0.000 description 4
- 239000003063 flame retardant Substances 0.000 description 4
- 210000003128 head Anatomy 0.000 description 4
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- 239000011256 inorganic filler Substances 0.000 description 4
- 229910003475 inorganic filler Inorganic materials 0.000 description 4
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 4
- 238000004513 sizing Methods 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 239000012756 surface treatment agent Substances 0.000 description 4
- BYEAHWXPCBROCE-UHFFFAOYSA-N 1,1,1,3,3,3-hexafluoropropan-2-ol Chemical compound FC(F)(F)C(O)C(F)(F)F BYEAHWXPCBROCE-UHFFFAOYSA-N 0.000 description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 3
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 3
- 238000011101 absolute filtration Methods 0.000 description 3
- 150000001463 antimony compounds Chemical class 0.000 description 3
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 3
- 239000006227 byproduct Substances 0.000 description 3
- 238000004040 coloring Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 238000011437 continuous method Methods 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 3
- 238000004821 distillation Methods 0.000 description 3
- 150000002148 esters Chemical class 0.000 description 3
- 125000003827 glycol group Chemical group 0.000 description 3
- 238000004898 kneading Methods 0.000 description 3
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 3
- 239000000347 magnesium hydroxide Substances 0.000 description 3
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 239000004745 nonwoven fabric Substances 0.000 description 3
- 150000003018 phosphorus compounds Chemical class 0.000 description 3
- 239000003381 stabilizer Substances 0.000 description 3
- 238000005979 thermal decomposition reaction Methods 0.000 description 3
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 2
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 2
- FJKROLUGYXJWQN-UHFFFAOYSA-N 4-hydroxybenzoic acid Chemical compound OC(=O)C1=CC=C(O)C=C1 FJKROLUGYXJWQN-UHFFFAOYSA-N 0.000 description 2
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 2
- AEMRFAOFKBGASW-UHFFFAOYSA-N Glycolic acid Chemical compound OCC(O)=O AEMRFAOFKBGASW-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 229920000877 Melamine resin Polymers 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 2
- 229940058905 antimony compound for treatment of leishmaniasis and trypanosomiasis Drugs 0.000 description 2
- LJCFOYOSGPHIOO-UHFFFAOYSA-N antimony pentoxide Chemical compound O=[Sb](=O)O[Sb](=O)=O LJCFOYOSGPHIOO-UHFFFAOYSA-N 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- 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
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical compound OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 description 2
- 235000019445 benzyl alcohol Nutrition 0.000 description 2
- 239000007809 chemical reaction catalyst Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
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- PFURGBBHAOXLIO-UHFFFAOYSA-N cyclohexane-1,2-diol Chemical compound OC1CCCCC1O PFURGBBHAOXLIO-UHFFFAOYSA-N 0.000 description 2
- 230000009849 deactivation Effects 0.000 description 2
- 125000001142 dicarboxylic acid group Chemical group 0.000 description 2
- NJLLQSBAHIKGKF-UHFFFAOYSA-N dipotassium dioxido(oxo)titanium Chemical compound [K+].[K+].[O-][Ti]([O-])=O NJLLQSBAHIKGKF-UHFFFAOYSA-N 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
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- LNTHITQWFMADLM-UHFFFAOYSA-N gallic acid Chemical compound OC(=O)C1=CC(O)=C(O)C(O)=C1 LNTHITQWFMADLM-UHFFFAOYSA-N 0.000 description 2
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- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 2
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- 235000011007 phosphoric acid Nutrition 0.000 description 2
- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical compound OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 description 2
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- CYIDZMCFTVVTJO-UHFFFAOYSA-N pyromellitic acid Chemical compound OC(=O)C1=CC(C(O)=O)=C(C(O)=O)C=C1C(O)=O CYIDZMCFTVVTJO-UHFFFAOYSA-N 0.000 description 2
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- 150000003609 titanium compounds Chemical class 0.000 description 2
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- VXUYXOFXAQZZMF-UHFFFAOYSA-N titanium(IV) isopropoxide Chemical compound CC(C)O[Ti](OC(C)C)(OC(C)C)OC(C)C VXUYXOFXAQZZMF-UHFFFAOYSA-N 0.000 description 2
- ARCGXLSVLAOJQL-UHFFFAOYSA-N trimellitic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C(C(O)=O)=C1 ARCGXLSVLAOJQL-UHFFFAOYSA-N 0.000 description 2
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- WVDRSXGPQWNUBN-UHFFFAOYSA-N 4-(4-carboxyphenoxy)benzoic acid Chemical compound C1=CC(C(=O)O)=CC=C1OC1=CC=C(C(O)=O)C=C1 WVDRSXGPQWNUBN-UHFFFAOYSA-N 0.000 description 1
- NEQFBGHQPUXOFH-UHFFFAOYSA-N 4-(4-carboxyphenyl)benzoic acid Chemical compound C1=CC(C(=O)O)=CC=C1C1=CC=C(C(O)=O)C=C1 NEQFBGHQPUXOFH-UHFFFAOYSA-N 0.000 description 1
- 229940090248 4-hydroxybenzoic acid Drugs 0.000 description 1
- KAUQJMHLAFIZDU-UHFFFAOYSA-N 6-Hydroxy-2-naphthoic acid Chemical compound C1=C(O)C=CC2=CC(C(=O)O)=CC=C21 KAUQJMHLAFIZDU-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- 239000005995 Aluminium silicate Substances 0.000 description 1
- 239000004114 Ammonium polyphosphate Substances 0.000 description 1
- 229910052582 BN Inorganic materials 0.000 description 1
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- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
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Landscapes
- Polyesters Or Polycarbonates (AREA)
Description
第3重縮合反応槽(k)が設けられている点が異なる。第3重縮合反応槽(k)は、複数個の攪拌翼ブロックで構成され、2軸のセルフクリーニングタイプの攪拌翼を具備した横型の反応槽である。抜出ライン(L3)を通じて第2重縮合反応槽(d)から第3重縮合反応槽(k)に導入されたポリマーは、ここで更に重縮合が進められた後、抜出用ギヤポンプ(m)及び抜出ライン(L5)を経てダイスヘッド(g)から溶融したストランドの形態で抜き出され、水などで冷却された後、回転式カッター(h)で切断されてペレットとなる。符号(L6)は第3重縮合反応槽(k)のベントラインである。
以下の計算式(4)によって酸価およびケン化価から算出した。酸価は、ジメチルホルムアミドにオリゴマーを溶解させ、0.1NのKOH/メタノール溶液を使用して滴定により求めた。ケン化価は0.5NのKOH/エタノール溶液でオリゴマーを加水分解し、0.5Nの塩酸で滴定し求めた。
ベンジルアルコール25mLにPBT又はオリゴマー0.5gを溶解し、水酸化ナトリウムの0.01モル/Lベンジルアルコール溶液を使用して滴定した。
ウベローデ型粘度計を使用し次の要領で求めた。すなわち、フェノール/テトラクロロエタン(重量比1/1)の混合溶媒を使用し、30℃において、濃度1.0g/dLのポリマー溶液および溶媒のみの落下秒数を測定し、以下の式(5)より求めた。
電子工業用高純度硫酸および硝酸でPBTを湿式分解し、高分解能ICP(Inductivery Coupled Plasma)−MS(Mass Spectrometer )(サーモクエスト社製)を使用して測定した。
重クロロホルム/ヘキサフルオロイソプロパノール=7/3(体積比)の混合溶媒1mLにPBT約100mgを溶解させ、重ピリジン36μLを添加し、50℃で1H−NMRを測定し求めた。NMR装置には日本電子(株)製「α−400」又は「AL−400」を使用した
Film Quality Testing System[オプティカルコントロールシステムズ社 形式FS−5]を使用し、厚さ50μmのフィルムを成形し、1m2当たりの25μm以上のフィッシュアイ数を測定した。
示差走査熱量計[パーキンエルマー社、型式DSC7]を使用し、昇温速度20℃/minで室温から300℃まで昇温した後、降温速度20℃/minで80℃まで降温し、発熱ピークの温度を降温結晶化温度とした。Tcが高いほど結晶化速度が速く、成形サイクルが短くなる。
フェノール/テトラクロロエタン=3/2(重量比)の混合溶媒20mLにPBT2.70gを110℃で30分間溶解させた後、30℃の恒温水槽で15分間冷却し、日本電色(株)製濁度計(NDH−300A)を使用し、セル長10mmで測定した。値が低いほど透明性が良好であることを示す。
日本電色(株)製色差計(Z−300A型)を使用し、L、a、b表色系におけるb値を算出し評価した。値が低いほど黄ばみが少なく色調が良好であることを示す。
内径5mmのキャピラリーにPBTペレットを粉砕後に乾燥して充填して窒素置換し、窒素下で245℃にコントロールしたオイルバスに浸漬し、40分後に取り出し、液体窒素で急冷させた。内容物の温度が十分下がった後、内容物を取り出し、末端カルボキシル基濃度および末端水酸基濃度を測定し、前述の式(1)より求めた。
図1に示すエステル化工程と図6に示す重縮合工程を通し、次の要領でPBTの製造を行った。先ず、テレフタル酸1.00モルに対して、1,4−ブタンジオール1.80モルの割合で混合した60℃のスラリーをスラリー調製槽から原料供給ライン(1)を通じ、予め、エステル化率99%のPBTオリゴマーを充填したスクリュー型攪拌機を有するエステル化のための反応槽(A)に、28.5kg/hとなる様に連続的に供給した。同時に、再循環ライン(2)から185℃の精留塔(C)の塔底成分を12.0kg/hで供給し、触媒供給ライン(3)から触媒として65℃のテトラブチルチタネートの6.0重量%1,4−ブタンジオール溶液を69g/hで供給した(理論ポリマー収量に対し30ppm)。この溶液中の水分は0.20重量%であった。
実施例1において、図7に示す重縮合工程を採用した以外は実施例1と同様に行った。図7に示す重縮合工程のフィルター(f)としては、金属不織布から成る絶対濾過精度20μmのプリーツ型円筒タイプのフィルターを使用した。実施例1より更にフィッシュアイの低減されたPBTが得られた。分析値はまとめて表1に示した。
実施例1において、再循環ライン(2)から反応槽(A)に供給する精留塔(C)の塔底成分の流量を5.6kg/hに変更し、第2重縮合反応槽の内温を243℃、第3重縮合反応槽(k)の内温を243℃、滞留時間を150分とした以外は、実施例1と同様に行った。フィッシュアイが少なく、色調に優れ透明性が良好で熱安定性に優れたPBTが得られた。分析値はまとめて表1に示した。
実施例1において、ポリマー中のTi含有量が表1の通りとなる様にテトラブチルチタネートの供給量を調節し、第2重縮合反応槽(d)の内温を240℃、第3重縮合反応槽(k)の滞留時間を90分にした以外は、実施例1と同様に行った。フィッシュアイが増加し、透明性が悪化した。分析値はまとめて表1に示した。
実施例1において、図1に示すエステル化工程の触媒供給ライン(3)を原料供給ライン(1)に連結させ、再循環ライン(2)を反応槽(A)の気相部に位置させ、そして、テトラブチルチタネートの1,4−ブタンジオール溶液の供給量を340g/h、第3重縮合反応槽(k)の圧力を150Pa、滞留時間を100分にした以外は、実施例1と同様に行った。表に示す様に、ヘイズ、色調、熱安定性が悪化し、フィッシュアイも多かった。分析値はまとめて表1に示した。
タービン型攪拌翼を具備した内容積200Lのステンレス製反応容器に、テレフタル酸ジメチル(DMT)272.9mol、1,4−ブタンジオール327.5mol、テトラブチルチタネート0.189モル(チタン量として理論収量ポリマー当たり150ppm)を仕込み十分窒素置換させた。続いて、系を昇温し、60分後に温度210℃、窒素下大気圧で、生成するメタノール、1,4−ブタンジオール、THFを系外に留出させながら、2時間エステル交換反応させた(反応開始時間は、所定温度、所定圧力に達した時点とした)。
タービン型攪拌翼を具備した内容積200Lのステンレス製反応容器に、テレフタル酸ジメチル(DMT)272.9mol、1,4−ブタンジオール327.5mol、テトラブチルチタネート0.101モル(チタン量として理論収量ポリマー当たり80ppm)を仕込み十分窒素置換させた。続いて、系を昇温し、60分後に温度210℃、窒素下大気圧で、生成するメタノール、1,4−ブタンジオール、THFを系外に留出させながら、2時間エステル交換反応させた(反応開始時間は、所定温度、所定圧力に達した時点とした)。
2:再循環ライン
3:触媒供給ライン
4:抜出ライン
5:留出ライン
6:抜出ライン
7:循環ライン
8:抜出ライン
9:ガス抜出ライン
10:凝縮液ライン
11:抜出ライン
12:循環ライン
13:抜出ライン
14:ベントライン
15:回収ライン
16:バイパスライン
A:反応槽
B:抜出ポンプ
C:精留塔
D、E:ポンプ
F:タンク
G:コンデンサ
H:リボイラ
L1:抜出ライン
L3、L5:抜出ライン
L2、L4、L6:ベントライン
a:第1重縮合反応槽
d:第2重縮合反応槽
k:第3重縮合反応槽
c、e、m:抜出用ギヤポンプ
f:フィルター
g:ダイスヘッド
h:回転式カッター
Claims (6)
- 直接重合法で製造され、チタンを含有し且つその量がチタン原子として50ppm以下であり、固有粘度が1.20〜2.00dL/g、末端カルボキシル基濃度が15〜50μeq/g、末端メトキシカルボニル基濃度が0.5μeq/g以下、末端ビニル基濃度が0.5〜12μeq/gであることを特徴とするポリブチレンテレフタレート(但し、固有粘度が1.20dL/gであるものを除く)。
- 示差走査熱量計で降温速度20℃/minにて測定した降温結晶化温度(示差走査熱量計を使用し、昇温速度20℃/minで室温から300℃まで昇温した後、降温速度20℃/minで80℃まで降温したときの発熱ピークの温度)が175〜180℃である請求項1に記載のポリブチレンテレフタレート。
- フェノール/テトラクロロエタン混合溶媒(重量比3/2)20mLにポリブチレンテレフタレート2.7gを溶解させて測定した際の溶液ヘイズが10%以下である請求項1又は2に記載のポリブチレンテレフタレート。
- 不活性雰囲気下に245℃で40分間、熱処理した際の加水分解反応を除く末端カルボキシル基濃度の上昇が0.1〜10μeq/gである請求項1〜3の何れかに記載のポリブチレンテレフタレート。
- 固有粘度が1.30〜1.50dL/gである請求項1〜4の何れかに記載のポリブチレンテレフタレート。
- 固相重合を行わずに得られた請求項1〜5の何れかに記載のポリブチレンテレフタレート。
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