JPS5614525A - Production of high polymerization degree polyester - Google Patents

Production of high polymerization degree polyester

Info

Publication number
JPS5614525A
JPS5614525A JP8932279A JP8932279A JPS5614525A JP S5614525 A JPS5614525 A JP S5614525A JP 8932279 A JP8932279 A JP 8932279A JP 8932279 A JP8932279 A JP 8932279A JP S5614525 A JPS5614525 A JP S5614525A
Authority
JP
Japan
Prior art keywords
polyester
polymerization degree
high polymerization
cooh groups
terminal cooh
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
JP8932279A
Other languages
Japanese (ja)
Inventor
Hiroo Inada
Makoto Ogasawara
Shunichi Matsumura
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 JP8932279A priority Critical patent/JPS5614525A/en
Publication of JPS5614525A publication Critical patent/JPS5614525A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To produce a polymer of high polymerization degree having excellent wet heat resistance, by treating a linear saturated polyester having an intrinsic viscosity higher than a specified value, with a decarboxylating agent for reducing the content of carboxyl group, adding a compound having a specific structure to the above- treated polyester and reacting the resulting mixture.
CONSTITUTION: A linear polyester having an intrinsic viscosity of at leats 0.35, s uch as polyethylene terephthalate (PET) is treated with a decarboxylating agnet for reducing content which reacts with the terminal COOH groups of the polyester and liberates CO2, such as ethylene carbonate, thereby to reduce the amount of the terminal COOH groups of the PET to below 20eq./106g. Then, to the reaction mixture is added 0.1W10pts.wt. of bisoxazolone and bisoxazinone compounds represented by formulas I and II, and the reaction mixture is reacted in the molten state. In this way, a saturated polyester having a low content of terminal COOH groups, excellent wet heat resistance, a high polymerization degree and superior mechanical properties is obtd.
COPYRIGHT: (C)1981,JPO&Japio
JP8932279A 1979-07-16 1979-07-16 Production of high polymerization degree polyester Pending JPS5614525A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8932279A JPS5614525A (en) 1979-07-16 1979-07-16 Production of high polymerization degree polyester

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8932279A JPS5614525A (en) 1979-07-16 1979-07-16 Production of high polymerization degree polyester

Publications (1)

Publication Number Publication Date
JPS5614525A true JPS5614525A (en) 1981-02-12

Family

ID=13967425

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8932279A Pending JPS5614525A (en) 1979-07-16 1979-07-16 Production of high polymerization degree polyester

Country Status (1)

Country Link
JP (1) JPS5614525A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57161122A (en) * 1981-03-25 1982-10-04 Teijin Ltd Preparation of molded polyester article
JPS5953529A (en) * 1982-09-22 1984-03-28 Teijin Ltd Manufacture of polyester
US4576467A (en) * 1983-06-27 1986-03-18 Dainippon Screen Mfg. Co., Ltd. Liquid developing apparatus
US4586809A (en) * 1983-05-26 1986-05-06 Dainippon Screen Mfg. Co., Ltd. Liquid developing equipment for electrophotographic copying machine
US4664502A (en) * 1984-06-27 1987-05-12 Dainippon Screen Mfg. Co., Ltd. Liquid developing apparatus for use in electrophotographic copying machine
US5150160A (en) * 1990-04-02 1992-09-22 Fuji Photo Film Co., Ltd. Liquid electrophotographic apparatus having an improved back electrode

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57161122A (en) * 1981-03-25 1982-10-04 Teijin Ltd Preparation of molded polyester article
JPS5953529A (en) * 1982-09-22 1984-03-28 Teijin Ltd Manufacture of polyester
US4586809A (en) * 1983-05-26 1986-05-06 Dainippon Screen Mfg. Co., Ltd. Liquid developing equipment for electrophotographic copying machine
US4576467A (en) * 1983-06-27 1986-03-18 Dainippon Screen Mfg. Co., Ltd. Liquid developing apparatus
US4664502A (en) * 1984-06-27 1987-05-12 Dainippon Screen Mfg. Co., Ltd. Liquid developing apparatus for use in electrophotographic copying machine
US5150160A (en) * 1990-04-02 1992-09-22 Fuji Photo Film Co., Ltd. Liquid electrophotographic apparatus having an improved back electrode

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