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JPS5516024A - Preparation of polyester - Google Patents

Preparation of polyester

Info

Publication number
JPS5516024A
JPS5516024A JP8835678A JP8835678A JPS5516024A JP S5516024 A JPS5516024 A JP S5516024A JP 8835678 A JP8835678 A JP 8835678A JP 8835678 A JP8835678 A JP 8835678A JP S5516024 A JPS5516024 A JP S5516024A
Authority
JP
Japan
Prior art keywords
acid
glycol
titanium
millimol
lactam
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
JP8835678A
Other languages
Japanese (ja)
Inventor
Wataru Funakoshi
Kiyoshi Nawata
Kiyokazu Tsunawaki
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 JP8835678A priority Critical patent/JPS5516024A/en
Publication of JPS5516024A publication Critical patent/JPS5516024A/en
Pending legal-status Critical Current

Links

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  • Polyesters Or Polycarbonates (AREA)

Abstract

PURPOSE: To obtain a high-quality polyester with little softening point drop, good appearance, and useful for fibers, etc., by direct esterification between terephthalic acid and a glycol in the presence of a specific lactam and an organo-titanium compound followed by carrying out polycondensation.
CONSTITUTION: A direct esterification is carried out between terephthalic acid (along with a dicarboxylic acid such as adipic acid, sebacic acid, isophthalic acid, etc.) and a glycol such as ethylene glycol, 1,3-propanediol, neopentyl glycol, etc., in the presence of a lactam of formula (X is 3W5C alkylene, R is H or 1W4C alkyl), e.g. a pyrrolidone, ε-caprolactam, etc., and an organotitanium compound such as a titanium carboxylate, etc., in amounts of 5W100 millimol %, 0.5W50 millimol % (calculated and as titanium atom), both based on the dicarboxylic acid, respectively. The reaction product obtained above is subsequently subjected to polycondensation.
COPYRIGHT: (C)1980,JPO&Japio
JP8835678A 1978-07-21 1978-07-21 Preparation of polyester Pending JPS5516024A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8835678A JPS5516024A (en) 1978-07-21 1978-07-21 Preparation of polyester

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8835678A JPS5516024A (en) 1978-07-21 1978-07-21 Preparation of polyester

Publications (1)

Publication Number Publication Date
JPS5516024A true JPS5516024A (en) 1980-02-04

Family

ID=13940526

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8835678A Pending JPS5516024A (en) 1978-07-21 1978-07-21 Preparation of polyester

Country Status (1)

Country Link
JP (1) JPS5516024A (en)

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