KR930012867A - Method for preparing polybutylene terephthalate - Google Patents

Method for preparing polybutylene terephthalate Download PDF

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Publication number
KR930012867A
KR930012867A KR1019910025826A KR910025826A KR930012867A KR 930012867 A KR930012867 A KR 930012867A KR 1019910025826 A KR1019910025826 A KR 1019910025826A KR 910025826 A KR910025826 A KR 910025826A KR 930012867 A KR930012867 A KR 930012867A
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KR
South Korea
Prior art keywords
butyl
titanate
propionate
tert
catalyst
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KR1019910025826A
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Korean (ko)
Inventor
유영출
김헌수
Original Assignee
공정곤
동양나이론 주식회사
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Priority to KR1019910025826A priority Critical patent/KR930012867A/en
Publication of KR930012867A publication Critical patent/KR930012867A/en

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  • Polyesters Or Polycarbonates (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

본 발명은 폴리부틸렌 테레프탈레이트의 제조방법으로 테레프탈산과 1,4-부탄디올의 직접 에스테르화 반응에 있어 에스테르화 반응중기(160 내지 180℃)와 중축합 반응초기에 촉매로서 유기티탄 화합물을 0.05 내지 0.2중량부 첨가하고 에스테르화 반응초기와 중축합 반응초기에 안정제를 0.01 내지 0.1중량부 첨가시키는 것으로 촉매의 손실을 막고 테트라하이드로푸란의 생성을 억제하는 효과를 갖는다.The present invention is a method for producing polybutylene terephthalate in the esterification reaction of terephthalic acid and 1,4-butanediol in the esterification stage (160 to 180 ℃) and polycondensation reaction in the early stage of the polycondensation reaction 0.05 to 0.05 to the organic titanium compound as a catalyst By adding 0.2 parts by weight and adding 0.01 to 0.1 parts by weight of a stabilizer in the initial esterification reaction and the initial polycondensation reaction, it has the effect of preventing the loss of the catalyst and suppressing the production of tetrahydrofuran.

Description

폴리부틸렌 테레프탈레이트의 제조방법Method for preparing polybutylene terephthalate

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

Claims (6)

테레프탈산과 1,4-부탄디올의 직접 에스테르화 반응에 의한 폴리부틸렌 테레프탈레이트의 제조방법에 있어서, 에스테르화 반응중기(160 내지 180℃)와 중축합 반응 초기에 촉매로서 유기 티탄 화합물을 0.05 내지 0.2중량부 첨가하고 에스테르화 반응 초기와 중축합 반응 초기에 안정제를 0.01 내지 0.1중량부 첨가함을 특징으로 하는 폴리부틸렌 테레프탈레이트의 제조방법.In the method for producing polybutylene terephthalate by direct esterification of terephthalic acid and 1,4-butanediol, the organic titanium compound is 0.05 to 0.2 as a catalyst in the initial stage of the polycondensation reaction with the esterification reaction group (160 to 180 ° C). A method for producing polybutylene terephthalate, characterized in that the addition of 0.01 to 0.1 parts by weight of the stabilizer at the beginning of the esterification reaction and the initial polycondensation reaction. 제1항에 있어서, 촉매가 티타늄 테트라부톡사이드, 테트라메틸 티타네이트, 에틸렌 글리콜티타네트, 테트라부틸렌 글리콜 티타네이트, 테트라부틸 티타네이트, 테트라이소프필 티타네이트, 테트라(2-에틸헥실) 티타네이트 및 테트라옥틸 티타네이트로 이루어진 그룹으로 부터 선택되고, 열안정제 또는 산화방지제가 인산, 아인산, 치아인산, 인산암모늄, 모노메틸포스페이트, 트리메틸포스페이트, 모노에틸포스페이트, 디에틸포스페이트, 디메틸포스페이트, 디메틸에틸포스포네이트, 펜타에리트리실 테트라키스〔3-(3,5-디-3급 부틸-4-하이드록시페닐)-프로피오네이트)및 트리에틸렌 글리콜-비스-3(3-3급 부틸-4-하이드록시-5-메틸페닐)-프로피오네이트로 이루어진 그룹으로 부터 선택되는 제조방법.The catalyst of claim 1 wherein the catalyst is titanium tetrabutoxide, tetramethyl titanate, ethylene glycol titanate, tetrabutylene glycol titanate, tetrabutyl titanate, tetraisopropyl titanate, tetra (2-ethylhexyl) titanate And tetraoctyl titanate, wherein the thermal stabilizer or antioxidant is selected from phosphoric acid, phosphorous acid, phosphoric acid, ammonium phosphate, monomethylphosphate, trimethylphosphate, monoethylphosphate, diethylphosphate, dimethylphosphate, dimethylethylphosphate Phonates, pentaerythryl tetrakis (3- (3,5-di-tert-butyl-4-hydroxyphenyl) -propionate) and triethylene glycol-bis-3 (tert-butyl butyl-4-) A production method selected from the group consisting of hydroxy-5-methylphenyl) -propionate. 제1항에 있어서, 에스테르화 반응온도가 230 내지 235℃인 제조방법.The method according to claim 1, wherein the esterification temperature is 230 to 235 ° C. 제1항에 있어서, 중축합 반응온도가 250 내지 255℃인 제조방법.The method according to claim 1, wherein the polycondensation reaction temperature is 250 to 255 ° C. 제2항에 있어서, 열안정제 또는 산화방지제가 펜타에리트리실 테트라키스 〔3-(3,5-디-3급 부틸-4-하이드록시페닐)-프로피오네이트)또는 트리에틸렌 글리콜-비스-3(3-3급 부틸-4-하이드록시-5-메틸페닐)-프로피오네이트인 제조방법.The heat stabilizer or antioxidant according to claim 2, wherein the thermal stabilizer or antioxidant is pentaerythryl tetrakis (3- (3,5-di-tert-butyl-4-hydroxyphenyl) -propionate) or triethylene glycol-bis-3 (3-tert-butyl-4-hydroxy-5-methylphenyl)-a propionate. The manufacturing method. 제5항에 있어서, 펜타에리트리실 테트라키스〔3-(3,5-디-3급 부틸-4-하이드록시페닐)-프로피오네이트)와 트리에틸렌 글리콜-비스-3(3-3급 부틸-4-하이드록시-5-메틸페닐)-프로피오네이트가 1:1의 혼합비로 사용되는 제조방법.The pentaerythryl tetrakis (3- (3,5-di-tert-butyl-4-hydroxyphenyl) -propionate) and triethylene glycol-bis-3 (tert-butyl) according to claim 5 -4 -hydroxy-5 -methylphenyl)-propionate is used in a mixing ratio of 1: 1. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019910025826A 1991-12-31 1991-12-31 Method for preparing polybutylene terephthalate KR930012867A (en)

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KR1019910025826A KR930012867A (en) 1991-12-31 1991-12-31 Method for preparing polybutylene terephthalate

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KR1019910025826A KR930012867A (en) 1991-12-31 1991-12-31 Method for preparing polybutylene terephthalate

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