JP2010083948A5

JP2010083948A5 -

Info

Publication number: JP2010083948A5
Application number: JP2008252932A
Authority: JP
Filing date: 2008-09-30
Publication date: 2011-10-27
Anticipated expiration: 2028-09-30

Description

本発明者らは、上記の目的を達成するために鋭意検討を重ねた結果、本発明に至った。すなわち、本発明は、
（１）テレフタル酸を主成分とするジカルボン酸と１，４−ブタンジオールを主成分とするジオールとを、エステル化反応させた後、次いで重縮合反応させてポリブチレンテレフタレートを製造する方法であって、ジオール化合物含有量が５重量％以下である有機チタン化合物をエステル化反応槽へ添加するポリブチレンテレフタレートの製造方法、
（２）エステル化反応槽へ添加する有機チタン化合物を、エステル化反応槽付属の精留塔底部から還流されるジオール中、及び／または、ジカルボン酸とジオールとのスラリー中へ添加する（１）記載のポリブチレンテレフタレートの製造方法、
（３）ジオール化合物が、１，４−ブタンジオールである（１）または（２）に記載のポリブチレンテレフタレートの製造方法、
（４）有機チタン化合物がテトラ−ｎ−ブチルチタネートである（１）から（３）のいずれかに記載のポリブチレンテレフタレートの製造方法を提供するものである。 As a result of intensive studies to achieve the above object, the present inventors have reached the present invention. That is, the present invention
(1) A method for producing polybutylene terephthalate by subjecting a dicarboxylic acid containing terephthalic acid as a main component to a diol containing 1,4-butanediol as a main component, followed by a polycondensation reaction. Te method of manufacturing Lupo polybutylene terephthalate to adding the organic titanium compound diol compound content is 5 wt% or less to the esterification reaction tank,
(2) The organotitanium compound to be added to the esterification reaction tank is added to the diol refluxed from the bottom of the rectifying column attached to the esterification reaction tank and / or to the slurry of dicarboxylic acid and diol (1) A process for producing the polybutylene terephthalate according to the description,
(3) di-ol compound, a method for manufacturing polybutylene terephthalate described in 1,4-butanediol (1) or (2),
(4) The method for producing polybutylene terephthalate according to any one of (1) to (3), wherein the organic titanium compound is tetra-n-butyl titanate.

Claims

A diol composed mainly of dicarboxylic acid and 1,4-butanediol as a main component of terephthalic acid, after esterification reaction, and then a method for producing a polybutylene terephthalate by polycondensation reaction, a diol compounds added to Lupo method for producing polybutylene terephthalate organotitanium compound content is 5 wt% or less to the esterification reaction vessel.

2. The polytitanium according to claim 1, wherein the organotitanium compound added to the esterification reaction tank is added to the diol refluxed from the bottom of the rectification column attached to the esterification reaction tank and / or to the slurry of dicarboxylic acid and diol. A method for producing butylene terephthalate.

Di ol compound, method for producing a polybutylene terephthalate according to claim 1 or claim 2 which is 1,4-butanediol.

The method for producing polybutylene terephthalate according to any one of claims 1 to 3, wherein the organic titanium compound is tetra-n-butyl titanate.