JPS557874A - Production of polyester with high polymerization degree - Google Patents
Production of polyester with high polymerization degreeInfo
- Publication number
- JPS557874A JPS557874A JP8175578A JP8175578A JPS557874A JP S557874 A JPS557874 A JP S557874A JP 8175578 A JP8175578 A JP 8175578A JP 8175578 A JP8175578 A JP 8175578A JP S557874 A JPS557874 A JP S557874A
- Authority
- JP
- Japan
- Prior art keywords
- polyester
- produce
- polymerization degree
- prepolymer
- effected
- 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: The solid polycondensation of a polyester with specific amounts of terminal groups is effected to produce a high-polymerization-degree polyester with narrow polymerization degree distribution, readily melting uniformly and giving molded products free from pock mark and flow parttern.
CONSTITUTION: The melt polycondensation between dimethyl esters of aromatic dicarboxylic acids as terephthalic acid and glycols as ethylene glycol is effected to produce a prepolymer with methyl ester terminals of 6.5W13 (equivalene/106g polymer (hereinafter abbreviated to eq) and the total amount of the methyl ester terminals and free carboxyl groups of 30W45 eq and an intrinsic viscosity of 0.4W 0.7. The prepolymer is crashed into 3W15 mesh particles and is subjected to solid polycondensation at a temperature of 5W50°C lower than the melting point of the polymer under high vacuum to produce the objective polyester with polymerization degree.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8175578A JPS5952658B2 (en) | 1978-07-04 | 1978-07-04 | Manufacturing method of high polymerization degree polyester |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8175578A JPS5952658B2 (en) | 1978-07-04 | 1978-07-04 | Manufacturing method of high polymerization degree polyester |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS557874A true JPS557874A (en) | 1980-01-21 |
JPS5952658B2 JPS5952658B2 (en) | 1984-12-20 |
Family
ID=13755246
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8175578A Expired JPS5952658B2 (en) | 1978-07-04 | 1978-07-04 | Manufacturing method of high polymerization degree polyester |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5952658B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1997000279A1 (en) * | 1995-06-19 | 1997-01-03 | Polyplastics Co., Ltd. | Polyester resin and process for the production thereof |
KR100392891B1 (en) * | 2001-02-01 | 2003-07-28 | 주식회사 휴비스 | Polyester binder fiber |
JP2005255998A (en) * | 2004-03-08 | 2005-09-22 | Eastman Chem Co | Polyester polymer particles with small surface versus central molecular weight gradient |
-
1978
- 1978-07-04 JP JP8175578A patent/JPS5952658B2/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1997000279A1 (en) * | 1995-06-19 | 1997-01-03 | Polyplastics Co., Ltd. | Polyester resin and process for the production thereof |
US5877262A (en) * | 1995-06-19 | 1999-03-02 | Polyplastics Co., Ltd. | Polyester resin and process for the production thereof |
KR100392891B1 (en) * | 2001-02-01 | 2003-07-28 | 주식회사 휴비스 | Polyester binder fiber |
JP2005255998A (en) * | 2004-03-08 | 2005-09-22 | Eastman Chem Co | Polyester polymer particles with small surface versus central molecular weight gradient |
Also Published As
Publication number | Publication date |
---|---|
JPS5952658B2 (en) | 1984-12-20 |
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