JPS56131624A - Production of copolymer polyester - Google Patents
Production of copolymer polyesterInfo
- 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
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
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)
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 |
-
1980
- 1980-03-21 JP JP3471680A patent/JPS56131624A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS6310729B2 (en) | 1988-03-09 |
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