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1. JP1994234834 - PRODUCTION OF POLYETHYLENE TEREPHTHALATE

Office Japan
Application Number 1993310915
Application Date 10.12.1993
Publication Number 1994234834
Publication Date 23.08.1994
Grant Number 2583008
Grant Date 21.11.1996
Publication Kind B2
IPC
C08G 63/183
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
63Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
02Polyesters derived from hydroxy carboxylic acids or from polycarboxylic acids and polyhydroxy compounds
12derived from polycarboxylic acids and polyhydroxy compounds
16Dicarboxylic acids and dihydroxy compounds
18the acids or hydroxy compounds containing carbocyclic rings
181Acids containing aromatic rings
183Terephthalic acids
C08G 63/80
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
63Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
78Preparation processes
80Solid-state polycondensation
C08G 63/88
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
63Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
88Post-polymerisation treatment
Applicants MITSUI PETROCHEM IND LTD
三井化学株式会社
Inventors SHIRAKI SHIGEMI
白 木  茂 美
TANAKA YASUHIRO
田 中  康 裕
SAKAI KATSUYUKI
酒 井  勝 幸
Agents 鈴木 俊一郎
Priority Data 1989083356 31.03.1989 JP
1989094597 14.04.1989 JP
Title
(EN) PRODUCTION OF POLYETHYLENE TEREPHTHALATE
(JA) ポリエチレンテレフタレートの製造方法
Abstract
(EN)

PURPOSE: To obtain a polyethylene terephthalate scarcely containing oligomers such as cyclic trimer, hardly causing stain of molds, excellent in moldability and heat resistance and useful for bottles, etc., by esterifying terephthalic acid, etc., with ethylene glycol, etc., and polymerizing the resultant ester under specific conditions.

CONSTITUTION: Terephthalic acid (ester forming derivative) is esterified with ethylene glycol and the this resultant esterified product is heat-melted in the presence of a polycondensation catalyst to carry out liquid phase polycondensation. The resultant polycondensate is heated at a temperature not higher than a melting point under inert atmosphere to carry out solid phase polycondensation and the resultant solid phase polycondensate is brought into contact for 5min to 10hr with steam or steam-containing gas having a temperature kept to 70-150C and the polycondensation catalyst contained in the polymer is deactivated to provide the objective polymer.

COPYRIGHT: (C)1994,JPO&Japio

(JA)


【構成】 テレフタル酸またはそのエステル形成性誘導
体と、エチレングリコールまたはそのエステル形成性誘
導体とをエステル化するエステル化工程と、上記エステ
ル化工程で得られたエステル化物を重縮合触媒の存在下
で加熱溶融する液相重縮合工程と、上記液相重縮合工程
で得られた重縮合反応物を不活性雰囲気下で溶融点以下
の温度に加熱する固相重縮合工程と、上記固相重縮合工
程で得られた重縮合反応物を70℃~150℃の温度の
水蒸気または水蒸気含有ガスに5分間~10時間接触さ
せる水蒸気処理工程とを含むことを特徴とするポリエチ
レンテレフタレートの製造方法。


【効果】 成形時に生成する環状三量体などのオリゴマ
ー類の量が少なく、しかも成形時にポリエチレンテレフ
タレート中に含まれる環状三量体などのオリゴマー類の
総量が少ないため、成形時に金型汚れが発生しにくい。