JPS5466995A - Preparation of high molecular weight polyester - Google Patents

Preparation of high molecular weight polyester

Info

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
Application number
JP13358277A
Other languages
Japanese (ja)
Inventor
Shizuo Azuma
Noritsugu Saiki
Shoji Kawase
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 JP13358277A priority Critical patent/JPS5466995A/en
Priority to US05/923,585 priority patent/US4196279A/en
Priority to GB7830172A priority patent/GB2002010B/en
Priority to DE19782831779 priority patent/DE2831779A1/en
Publication of JPS5466995A publication Critical patent/JPS5466995A/en
Pending legal-status Critical Current

Links

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  • 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
JP13358277A 1977-07-19 1977-11-09 Preparation of high molecular weight polyester Pending JPS5466995A (en)

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)

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