JPS5763326A - Preparation of polyester - Google Patents

Preparation of polyester

Info

Publication number
JPS5763326A
JPS5763326A JP13678880A JP13678880A JPS5763326A JP S5763326 A JPS5763326 A JP S5763326A JP 13678880 A JP13678880 A JP 13678880A JP 13678880 A JP13678880 A JP 13678880A JP S5763326 A JPS5763326 A JP S5763326A
Authority
JP
Japan
Prior art keywords
bht
glycol
solution
polyester
polycondensation
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
JP13678880A
Other languages
Japanese (ja)
Other versions
JPH0124170B2 (en
Inventor
Toyohiko Masuda
Joshin Kuwata
Shunei Inoue
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 JP13678880A priority Critical patent/JPS5763326A/en
Publication of JPS5763326A publication Critical patent/JPS5763326A/en
Publication of JPH0124170B2 publication Critical patent/JPH0124170B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE: To obtain a PET type polyester having improved brightness, transparency, and drawing properties without causing end down, etc., by adding a Ca compound as a solution at a stage of an esterification conversion in a specific range, followed by filtration so that coarse particles are removed.
CONSTITUTION: In preparing a polyester by reacting a dicarboxylic acid consisting essentially of tereththalic acid with a glycol consisting essentially of ethylene glycol to give a glycol ester of dicarboxylic acid and/or its low polymer[bis-β-hydroxydi- ethyl terephthalate(BHT)]which is subjected to polycondensation, at a stage before the beginning of the polycondensation, 60W300ppm (based on polymer) Ca compound (preferably Ca acetate) calculated as Ca as a solution of a glycol and/or water is added to the BHT having esterification conversion of 95W99% and BHT is filtered by a filter with a mesh ≤200μ, or the Ca solution is previously filtered and added to BHT.
COPYRIGHT: (C)1982,JPO&Japio
JP13678880A 1980-10-02 1980-10-02 Preparation of polyester Granted JPS5763326A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13678880A JPS5763326A (en) 1980-10-02 1980-10-02 Preparation of polyester

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13678880A JPS5763326A (en) 1980-10-02 1980-10-02 Preparation of polyester

Publications (2)

Publication Number Publication Date
JPS5763326A true JPS5763326A (en) 1982-04-16
JPH0124170B2 JPH0124170B2 (en) 1989-05-10

Family

ID=15183525

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13678880A Granted JPS5763326A (en) 1980-10-02 1980-10-02 Preparation of polyester

Country Status (1)

Country Link
JP (1) JPS5763326A (en)

Also Published As

Publication number Publication date
JPH0124170B2 (en) 1989-05-10

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