JPS5466995A - Preparation of high molecular weight polyester - Google Patents
Preparation of high molecular weight polyesterInfo
- Publication number
- JPS5466995A JPS5466995A JP13358277A JP13358277A JPS5466995A JP S5466995 A JPS5466995 A JP S5466995A JP 13358277 A JP13358277 A JP 13358277A JP 13358277 A JP13358277 A JP 13358277A JP S5466995 A JPS5466995 A JP S5466995A
- Authority
- JP
- Japan
- Prior art keywords
- polyester
- molecular weight
- high molecular
- organoboron compound
- weight polyester
- 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
Landscapes
- Polyesters Or Polycarbonates (AREA)
Abstract
PURPOSE: To prepare a high molecular weight polyester containing a small amount of terminal carboxyl group in a short polymerization time, by carrying out the polycondensation in the presence of a specific organoboron compound.
CONSTITUTION: A linear polyester having an intrinsic viscosity of ≤ 0.2 is prepared from a dicarboxylic acid component, e.g. terephthalic acid, etc., and a glycol component, e.g. ethylene glycol, etc.. An organoboron compound expressed by the formula (R1, R2, R3 and R4 are 6W20C alkyl, etc.; M is alkali metal, etc.) (e.g. lithium tetraphenylboron, etc.) is added to the above polyester. A high molecular weight polyester is prepared by thermally polymerizing the composition under atmospheric or reduced pressure. The molar ratio of the organoboron compound to the polyester is pref. 0.05W10 to 1.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13358277A JPS5466995A (en) | 1977-11-09 | 1977-11-09 | Preparation of high molecular weight polyester |
US05/923,585 US4196279A (en) | 1977-07-19 | 1978-07-11 | Process for producing polyesters having a high degree of polymerization |
GB7830172A GB2002010B (en) | 1977-07-19 | 1978-07-18 | Process for producing polyesters having a high degree of polymerization |
DE19782831779 DE2831779A1 (en) | 1977-07-19 | 1978-07-19 | PROCESS FOR MANUFACTURING PRACTICAL LINEAR POLYESTER |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13358277A JPS5466995A (en) | 1977-11-09 | 1977-11-09 | Preparation of high molecular weight polyester |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5466995A true JPS5466995A (en) | 1979-05-29 |
Family
ID=15108169
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13358277A Pending JPS5466995A (en) | 1977-07-19 | 1977-11-09 | Preparation of high molecular weight polyester |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5466995A (en) |
-
1977
- 1977-11-09 JP JP13358277A patent/JPS5466995A/en active Pending
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