JPS54150495A - Production of polyester - Google Patents

Production of polyester

Info

Publication number
JPS54150495A
JPS54150495A JP5979778A JP5979778A JPS54150495A JP S54150495 A JPS54150495 A JP S54150495A JP 5979778 A JP5979778 A JP 5979778A JP 5979778 A JP5979778 A JP 5979778A JP S54150495 A JPS54150495 A JP S54150495A
Authority
JP
Japan
Prior art keywords
tpa
polyester
bhet
molar ratio
terephthalic 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.)
Pending
Application number
JP5979778A
Other languages
Japanese (ja)
Inventor
Fumiyuki Suzuki
Toshimitsu Okutsu
Keitaro Oe
Mitsuhiro Saito
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.)
Fujifilm Holdings Corp
Original Assignee
Fuji Photo Film 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 Fuji Photo Film Co Ltd filed Critical Fuji Photo Film Co Ltd
Priority to JP5979778A priority Critical patent/JPS54150495A/en
Publication of JPS54150495A publication Critical patent/JPS54150495A/en
Pending legal-status Critical Current

Links

Landscapes

  • Polyesters Or Polycarbonates (AREA)

Abstract

PURPOSE: The direct esterification between terephthalic acid and ethylene glycol forms oligomers, which is decomposed with an excess amount of EG, then the polycondensation reaction is effected, thus producing polyester with high transparency and polymerization degree.
CONSTITUTION: To bishydroxyethyl terephthalate (BHET) oligomers resulting from the direct esterification of terephthalic acid (TPA) with EG are continuously added a slurry of EG/TPA at a molar ratio of less than 1.2/1.0 and they are heated. The newly formed BHET is separated and transferred to the polycondensation tank and EG is added so that EG/TPA molar ratio becomes 1.2W2.0. Thus, polyester with a diethylene glycol content of less than 2% and high polymerization degree is obtained.
COPYRIGHT: (C)1979,JPO&Japio
JP5979778A 1978-05-19 1978-05-19 Production of polyester Pending JPS54150495A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5979778A JPS54150495A (en) 1978-05-19 1978-05-19 Production of polyester

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5979778A JPS54150495A (en) 1978-05-19 1978-05-19 Production of polyester

Publications (1)

Publication Number Publication Date
JPS54150495A true JPS54150495A (en) 1979-11-26

Family

ID=13123619

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5979778A Pending JPS54150495A (en) 1978-05-19 1978-05-19 Production of polyester

Country Status (1)

Country Link
JP (1) JPS54150495A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100430627B1 (en) * 2001-07-10 2004-05-10 주식회사 코오롱 A process of preparing the alkali extractable polyester

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100430627B1 (en) * 2001-07-10 2004-05-10 주식회사 코오롱 A process of preparing the alkali extractable polyester

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