JPS5731926A - Production of copolyester - Google Patents

Production of copolyester

Info

Publication number
JPS5731926A
JPS5731926A JP10640280A JP10640280A JPS5731926A JP S5731926 A JPS5731926 A JP S5731926A JP 10640280 A JP10640280 A JP 10640280A JP 10640280 A JP10640280 A JP 10640280A JP S5731926 A JPS5731926 A JP S5731926A
Authority
JP
Japan
Prior art keywords
copolyester
polymer
intrinsic viscosity
polymerization
diphenyl
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
JP10640280A
Other languages
Japanese (ja)
Inventor
Shunei Inoue
Kenjiro Horiuchi
Masakata Yanagi
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.)
Toray Industries Inc
Original Assignee
Toray Industries Inc
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 Toray Industries Inc filed Critical Toray Industries Inc
Priority to JP10640280A priority Critical patent/JPS5731926A/en
Publication of JPS5731926A publication Critical patent/JPS5731926A/en
Pending legal-status Critical Current

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  • Polyesters Or Polycarbonates (AREA)

Abstract

PURPOSE: To produce a high-viscosity, high-crystallinity copolyester, by melt- polymerizing a diphenyl-4,4'-dicarboxylic acid-based acid component with ethylene glycol until a specified intrinsic viscosity is reached and subjecting the polymer to solid phase polymerizaiton.
CONSTITUTION: A copolyester, intrinsic viscosity 0.4W0.65, is obtained by starting melt polymerization of an acid component consisting of 40W65mol% diphenyl-4,4'- dicarboxylic acid and 60W35mol% other aromatic and/or alicyclic dicarboxylic acids with a glycol component based on ethylene glycol at 230W260°C and terminating the polymerization at 280W330°C. Next, a copolyester, intrinsic viscosity ≥0.65, is obtained by subjecting the above copolyester to solid phase polymerization by keeping the polymer at a termperature 10W50°C below the m.p. of the polymer in an inert gas flow.
COPYRIGHT: (C)1982,JPO&Japio
JP10640280A 1980-08-04 1980-08-04 Production of copolyester Pending JPS5731926A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10640280A JPS5731926A (en) 1980-08-04 1980-08-04 Production of copolyester

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10640280A JPS5731926A (en) 1980-08-04 1980-08-04 Production of copolyester

Publications (1)

Publication Number Publication Date
JPS5731926A true JPS5731926A (en) 1982-02-20

Family

ID=14432685

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10640280A Pending JPS5731926A (en) 1980-08-04 1980-08-04 Production of copolyester

Country Status (1)

Country Link
JP (1) JPS5731926A (en)

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