JPS5731928A - Production of polyester - Google Patents

Production of polyester

Info

Publication number
JPS5731928A
JPS5731928A JP10702480A JP10702480A JPS5731928A JP S5731928 A JPS5731928 A JP S5731928A JP 10702480 A JP10702480 A JP 10702480A JP 10702480 A JP10702480 A JP 10702480A JP S5731928 A JPS5731928 A JP S5731928A
Authority
JP
Japan
Prior art keywords
polyester
oligomer
meq
lower alkyl
acid
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.)
Granted
Application number
JP10702480A
Other languages
Japanese (ja)
Other versions
JPS6140247B2 (en
Inventor
Yasuhiro Tokiyama
Hiroshi Kawabuchi
Nobuhiro Matsunaga
Katsuto Matsuzawa
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.)
Mitsubishi Kasei Corp
Nippon Ester Co Ltd
Original Assignee
Mitsubishi Kasei Corp
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 Mitsubishi Kasei Corp, Nippon Ester Co Ltd filed Critical Mitsubishi Kasei Corp
Priority to JP10702480A priority Critical patent/JPS5731928A/en
Publication of JPS5731928A publication Critical patent/JPS5731928A/en
Publication of JPS6140247B2 publication Critical patent/JPS6140247B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Polyesters Or Polycarbonates (AREA)
  • Artificial Filaments (AREA)

Abstract

PURPOSE: To produce a low diethylene glycol content polyester having excellent transparency and color, by polycondensing a specified polyester oligomer in the presence of a sulfocarboxylic acid anhydride catalyst.
CONSTITUTION: A polyester oligomer consisting of at least 80mol% ethylene terephthalate component and satisfying the relationships: Y (conversion %) ≥88, G/AV (G is glycolic OH concentration, meq/g oligomer, and AV is coarboxylic acid group concentration, meq/g oligomer) ≥1 and G≤-Y/6+17.70, is mixed with a sulfocarboxylic acid anhydride of the formula, wherein X is R1 or OR2, R1 is a lower alkyl, R2 is H or a lower alkyl, Ar is an aromatic group, m is 0W3 and n is 1W2, in an amount providing 0.1×10-4W20×10-4mol sulfonic acid residues per mol acid component constituting the polyester, and the mixture is subjected to polycondensation.
COPYRIGHT: (C)1982,JPO&Japio
JP10702480A 1980-08-04 1980-08-04 Production of polyester Granted JPS5731928A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10702480A JPS5731928A (en) 1980-08-04 1980-08-04 Production of polyester

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10702480A JPS5731928A (en) 1980-08-04 1980-08-04 Production of polyester

Publications (2)

Publication Number Publication Date
JPS5731928A true JPS5731928A (en) 1982-02-20
JPS6140247B2 JPS6140247B2 (en) 1986-09-08

Family

ID=14448575

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10702480A Granted JPS5731928A (en) 1980-08-04 1980-08-04 Production of polyester

Country Status (1)

Country Link
JP (1) JPS5731928A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4469978A (en) * 1982-09-06 1984-09-04 Kureha Kagaku Kogyo Kabushiki Kaisha Electrode arrangement for a folded polymer piezoelectric ultrasonic detector

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4469978A (en) * 1982-09-06 1984-09-04 Kureha Kagaku Kogyo Kabushiki Kaisha Electrode arrangement for a folded polymer piezoelectric ultrasonic detector

Also Published As

Publication number Publication date
JPS6140247B2 (en) 1986-09-08

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