JPS56131624A - Production of copolymer polyester - Google Patents

Production of copolymer polyester

Info

Publication number
JPS56131624A
JPS56131624A JP3471680A JP3471680A JPS56131624A JP S56131624 A JPS56131624 A JP S56131624A JP 3471680 A JP3471680 A JP 3471680A JP 3471680 A JP3471680 A JP 3471680A JP S56131624 A JPS56131624 A JP S56131624A
Authority
JP
Japan
Prior art keywords
esterification
dicarboxylic acid
polyester
ethylene glycol
production
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.)
Granted
Application number
JP3471680A
Other languages
Japanese (ja)
Other versions
JPS6310729B2 (en
Inventor
Shunei Inoue
Hiroyuki Harada
Masakata Yanagi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toray Industries Inc
Original Assignee
Toray Industries Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toray Industries Inc filed Critical Toray Industries Inc
Priority to JP3471680A priority Critical patent/JPS56131624A/en
Publication of JPS56131624A publication Critical patent/JPS56131624A/en
Publication of JPS6310729B2 publication Critical patent/JPS6310729B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Polyesters Or Polycarbonates (AREA)

Abstract

PURPOSE: To efficiently obtain a highly rigid, highly heat-resistant polyester, by resterifying ethylene glycol with a dicarboxylic acid mixture containing diphenyl- 4,4'-dicarboxylic acid under specified conditions and then polycondensing the reaction mixture.
CONSTITUTION: Into an esterification apparatus are introduced (A) ethylene glycol and (B) a mixture consisting of 40W80mol% diphenyl-4,4'-dicarboxylic acid and 60W20mol% other dicarboxylic acids, in a mol ratio of (A)/(B) of 1.1W2.5:1. Then, the esterification reaction is started at 230W270°C and at 0.5W2.5kg/cm2g. When the degree of esterification reaches 20W60%, the pressure is gradually released, and the esterification is brought to completion at normal or reduced pressure. Then, titled polyester is obtained by subjecting the esterification product to polycondensation.
EFFECT: It is possible to obtain a polyester which is excellent in m.p., crystallization characteristics, melt moldability, and is useful in the production of fibers, films, molded products, etc.
COPYRIGHT: (C)1981,JPO&Japio
JP3471680A 1980-03-21 1980-03-21 Production of copolymer polyester Granted JPS56131624A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3471680A JPS56131624A (en) 1980-03-21 1980-03-21 Production of copolymer polyester

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3471680A JPS56131624A (en) 1980-03-21 1980-03-21 Production of copolymer polyester

Publications (2)

Publication Number Publication Date
JPS56131624A true JPS56131624A (en) 1981-10-15
JPS6310729B2 JPS6310729B2 (en) 1988-03-09

Family

ID=12422054

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3471680A Granted JPS56131624A (en) 1980-03-21 1980-03-21 Production of copolymer polyester

Country Status (1)

Country Link
JP (1) JPS56131624A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02142917U (en) * 1989-05-01 1990-12-04
CN109314139B (en) 2016-09-20 2022-04-15 富士电机株式会社 Semiconductor device and method for manufacturing semiconductor device

Also Published As

Publication number Publication date
JPS6310729B2 (en) 1988-03-09

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