JPS5614525A - Production of high polymerization degree polyester - Google Patents
Production of high polymerization degree polyesterInfo
- 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
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
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)
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 |
-
1979
- 1979-07-16 JP JP8932279A patent/JPS5614525A/en active Pending
Cited By (6)
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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