JPS57147516A - Preparation of polyester - Google Patents

Preparation of polyester

Info

Publication number
JPS57147516A
JPS57147516A JP3119081A JP3119081A JPS57147516A JP S57147516 A JPS57147516 A JP S57147516A JP 3119081 A JP3119081 A JP 3119081A JP 3119081 A JP3119081 A JP 3119081A JP S57147516 A JPS57147516 A JP S57147516A
Authority
JP
Japan
Prior art keywords
polyester
reaction
component
acid
butanediol
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
JP3119081A
Other languages
Japanese (ja)
Inventor
Takatoshi Kuratsuji
Toshiro Isshiki
Takamasa Asano
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 JP3119081A priority Critical patent/JPS57147516A/en
Publication of JPS57147516A publication Critical patent/JPS57147516A/en
Pending legal-status Critical Current

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  • Polyesters Or Polycarbonates (AREA)

Abstract

PURPOSE: To prepare a polyester having low terminal carboxyl group concentration and excellent heat resistance, easily, by adding an alkaline metallic compound to the reaction system before the completion of the melt polymerization reaction of an aromatic dicarboxylic acid, etc. with butanediol, etc.
CONSTITUTION: The objective polyester is prepared by reacting (A) an acid component composed mainly of an aromatic dicarboxylic acid (preferably terephthalic acid) with (B) a glycol component composed mainly of 1,4-butanediol, and before the completion of the reaction, adding (C) an alkaline metallic compound (preferably an alkali metal compound such as NaOH) to the reaction system. The amount of the component (C) is preferably 20W500ppm based on the total acid component of the polyester. The addition of the component (C) is preferably carried out between the initiation of the esterification or the ester exchange reaction and the initial polymerization reaction.
COPYRIGHT: (C)1982,JPO&Japio
JP3119081A 1981-03-06 1981-03-06 Preparation of polyester Pending JPS57147516A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3119081A JPS57147516A (en) 1981-03-06 1981-03-06 Preparation of polyester

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3119081A JPS57147516A (en) 1981-03-06 1981-03-06 Preparation of polyester

Publications (1)

Publication Number Publication Date
JPS57147516A true JPS57147516A (en) 1982-09-11

Family

ID=12324505

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3119081A Pending JPS57147516A (en) 1981-03-06 1981-03-06 Preparation of polyester

Country Status (1)

Country Link
JP (1) JPS57147516A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5709916A (en) * 1995-07-27 1998-01-20 Teijin Limited Polybutylene terephthalate having low carboxyl group concentration and loose tube for optical fiber comprising the same
JP2001114884A (en) * 1999-10-15 2001-04-24 Toray Ind Inc Method for producing polybutylene terephthalate
JP2007119738A (en) * 2005-09-30 2007-05-17 Mitsubishi Chemicals Corp Method for producing polybutylene terephthalate

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4836195A (en) * 1971-09-13 1973-05-28
JPS4920295A (en) * 1972-06-19 1974-02-22
JPS50127954A (en) * 1974-03-29 1975-10-08
JPS5286493A (en) * 1976-01-12 1977-07-18 Teijin Ltd Preparation of polyesters
JPS5335795A (en) * 1976-09-16 1978-04-03 Teijin Ltd Preparation of polyester
JPS5533696A (en) * 1979-07-17 1980-03-08 Nikkiso Co Ltd Sampling method and apparatus for atomic power plant
JPS5785818A (en) * 1980-11-18 1982-05-28 Mitsubishi Chem Ind Ltd Production of polybutylene terephthalate

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4836195A (en) * 1971-09-13 1973-05-28
JPS4920295A (en) * 1972-06-19 1974-02-22
JPS50127954A (en) * 1974-03-29 1975-10-08
JPS5286493A (en) * 1976-01-12 1977-07-18 Teijin Ltd Preparation of polyesters
JPS5335795A (en) * 1976-09-16 1978-04-03 Teijin Ltd Preparation of polyester
JPS5533696A (en) * 1979-07-17 1980-03-08 Nikkiso Co Ltd Sampling method and apparatus for atomic power plant
JPS5785818A (en) * 1980-11-18 1982-05-28 Mitsubishi Chem Ind Ltd Production of polybutylene terephthalate

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5709916A (en) * 1995-07-27 1998-01-20 Teijin Limited Polybutylene terephthalate having low carboxyl group concentration and loose tube for optical fiber comprising the same
JP2001114884A (en) * 1999-10-15 2001-04-24 Toray Ind Inc Method for producing polybutylene terephthalate
JP4552243B2 (en) * 1999-10-15 2010-09-29 東レ株式会社 Process for producing polybutylene terephthalate
JP2007119738A (en) * 2005-09-30 2007-05-17 Mitsubishi Chemicals Corp Method for producing polybutylene terephthalate

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