JPS5548218A - Preparation of polyester with high polymerization degree - Google Patents

Preparation of polyester with high polymerization degree

Info

Publication number
JPS5548218A
JPS5548218A JP12144878A JP12144878A JPS5548218A JP S5548218 A JPS5548218 A JP S5548218A JP 12144878 A JP12144878 A JP 12144878A JP 12144878 A JP12144878 A JP 12144878A JP S5548218 A JPS5548218 A JP S5548218A
Authority
JP
Japan
Prior art keywords
polyester
polymerization degree
high polymerization
polymer
added
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.)
Pending
Application number
JP12144878A
Other languages
Japanese (ja)
Inventor
Wataru Funakoshi
Kiyoshi Nawata
Kiyokazu Tsunawaki
Masahiro Shiosaki
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.)
Teijin Ltd
Original Assignee
Teijin Ltd
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 Teijin Ltd filed Critical Teijin Ltd
Priority to JP12144878A priority Critical patent/JPS5548218A/en
Publication of JPS5548218A publication Critical patent/JPS5548218A/en
Pending legal-status Critical Current

Links

Landscapes

  • Polyesters Or Polycarbonates (AREA)

Abstract

PURPOSE: To obtain a polyester with high polymerization degree and low carboxyl content, by adding a specific melt viscosity reducing agent in the manufacture of the polyester in a molten state.
CONSTITUTION: The objective polyester can be obtained by adding a polymer (with an average polymerization degree of 5W20) having recurring units of formula (X is 3W6C alkylidene, 1W3C alkylene, sulfonyl, or -O-; n is an integer: 2W6) in the manufacturing process of the polyester of high polymerization degree by the reaction between dicarboxylic acids consisting chiefly of therephthalic acid and glycols consisting mainly of ethylene glycol or between the corresponding ester- forming derivatives. Said polymer is desired to be added at any time when the intrinsic viscosity of the reaction product is ≤0.6, and its amount to be added is such that the content in the polyester finally obtained may be 0.1W10wt% (especially 0.5W8wt%).
COPYRIGHT: (C)1980,JPO&Japio
JP12144878A 1978-10-04 1978-10-04 Preparation of polyester with high polymerization degree Pending JPS5548218A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12144878A JPS5548218A (en) 1978-10-04 1978-10-04 Preparation of polyester with high polymerization degree

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12144878A JPS5548218A (en) 1978-10-04 1978-10-04 Preparation of polyester with high polymerization degree

Publications (1)

Publication Number Publication Date
JPS5548218A true JPS5548218A (en) 1980-04-05

Family

ID=14811378

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12144878A Pending JPS5548218A (en) 1978-10-04 1978-10-04 Preparation of polyester with high polymerization degree

Country Status (1)

Country Link
JP (1) JPS5548218A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5865746A (en) * 1981-10-14 1983-04-19 Toyobo Co Ltd Copolyester composition

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5865746A (en) * 1981-10-14 1983-04-19 Toyobo Co Ltd Copolyester composition

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