JPS57108126A - Production of polyester - Google Patents
Production of polyesterInfo
- Publication number
- JPS57108126A JPS57108126A JP18313880A JP18313880A JPS57108126A JP S57108126 A JPS57108126 A JP S57108126A JP 18313880 A JP18313880 A JP 18313880A JP 18313880 A JP18313880 A JP 18313880A JP S57108126 A JPS57108126 A JP S57108126A
- Authority
- JP
- Japan
- Prior art keywords
- polyester
- mixture
- compound
- depolymerized
- polycondensation tank
- 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 produce a polyester excellent in lubricity and transparency, by depolymerizing a preceding batch polyester remaining in a polycondensation tank with a specified compound and then, after addition of a P compound, polycondensing the mixture.
CONSTITUTION: A preceding batch polyester remaining in a polycondensation tank is mixed with at least one component selected from the group consisting of ethylene glycol, bis(β-hydroxyethyl) terephthalate and a lower polymer thereof and then depolymerized by keeping the mixture at 230W280°C for 15minW2hr. Next, to this depolymerized mixture is added an esterified or transesterified product from a dicarboxylic acid (lower alkyl ester) and a glycol, and the resulting mixture is polycondensed in the presence of a P compound, e.g., triethyl phosphate, to obtain a polyester which has structural components based on ethylene terephthalate units and which contains fine particles deposited in the reaction system.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18313880A JPS57108126A (en) | 1980-12-24 | 1980-12-24 | Production of polyester |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18313880A JPS57108126A (en) | 1980-12-24 | 1980-12-24 | Production of polyester |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57108126A true JPS57108126A (en) | 1982-07-06 |
JPS646221B2 JPS646221B2 (en) | 1989-02-02 |
Family
ID=16130458
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18313880A Granted JPS57108126A (en) | 1980-12-24 | 1980-12-24 | Production of polyester |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57108126A (en) |
-
1980
- 1980-12-24 JP JP18313880A patent/JPS57108126A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS646221B2 (en) | 1989-02-02 |
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