JPS55145731A - Preparation of polyester with high terminal carboxyl group content - Google Patents

Preparation of polyester with high terminal carboxyl group content

Info

Publication number
JPS55145731A
JPS55145731A JP5452679A JP5452679A JPS55145731A JP S55145731 A JPS55145731 A JP S55145731A JP 5452679 A JP5452679 A JP 5452679A JP 5452679 A JP5452679 A JP 5452679A JP S55145731 A JPS55145731 A JP S55145731A
Authority
JP
Japan
Prior art keywords
antimony
germanium
compound
polyester
molecular polymer
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
JP5452679A
Other languages
Japanese (ja)
Inventor
Yasuhiro Tokiyama
Minoru Nishinohara
Hiroshi Okuno
Nobuhiro Matsunaga
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.)
Nippon Ester Co Ltd
Original Assignee
Nippon Ester Co 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 Nippon Ester Co Ltd filed Critical Nippon Ester Co Ltd
Priority to JP5452679A priority Critical patent/JPS55145731A/en
Publication of JPS55145731A publication Critical patent/JPS55145731A/en
Pending legal-status Critical Current

Links

Landscapes

  • Polyesters Or Polycarbonates (AREA)

Abstract

PURPOSE: To obtain a titled polyester with little generation of volatile components when heat-melted and being useful as a raw material for fiber or the like, by polycondensing a low-molecular polymer containing ethylene terephthalate as a main constituent in the presence of a catalyst such as an antimony compound or a germanium compound.
CONSTITUTION: Terephthalic acid and ethylene glycol are directly subjected to the esterification reaction in 90W93% esterification ratio, and a lows molecular polymer having value expressed by the formula of 90W93 is obtained. Subsequently, this low- molecular polymer is polycondensed by using an antimony compound such as antimony trioxide, antimony trichloride, or antimony acetate or and a germanium compound such a germanium dioxide, germanium ethoxide, or dimethylgermanium diacetate as a catalyst to obtain a titled polyester in which above 80% of a total terminal group is carboxyl group.
COPYRIGHT: (C)1980,JPO&Japio
JP5452679A 1979-05-02 1979-05-02 Preparation of polyester with high terminal carboxyl group content Pending JPS55145731A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5452679A JPS55145731A (en) 1979-05-02 1979-05-02 Preparation of polyester with high terminal carboxyl group content

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5452679A JPS55145731A (en) 1979-05-02 1979-05-02 Preparation of polyester with high terminal carboxyl group content

Publications (1)

Publication Number Publication Date
JPS55145731A true JPS55145731A (en) 1980-11-13

Family

ID=12973094

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5452679A Pending JPS55145731A (en) 1979-05-02 1979-05-02 Preparation of polyester with high terminal carboxyl group content

Country Status (1)

Country Link
JP (1) JPS55145731A (en)

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