JPS557874A - Production of polyester with high polymerization degree - Google Patents

Production of polyester with high polymerization degree

Info

Publication number
JPS557874A
JPS557874A JP8175578A JP8175578A JPS557874A JP S557874 A JPS557874 A JP S557874A JP 8175578 A JP8175578 A JP 8175578A JP 8175578 A JP8175578 A JP 8175578A JP S557874 A JPS557874 A JP S557874A
Authority
JP
Japan
Prior art keywords
polyester
produce
polymerization degree
prepolymer
effected
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
JP8175578A
Other languages
Japanese (ja)
Other versions
JPS5952658B2 (en
Inventor
Akio Tsuboi
Yoshihisa Hama
Tadashi Okudaira
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.)
Toyobo Co Ltd
Original Assignee
Toyobo 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 Toyobo Co Ltd filed Critical Toyobo Co Ltd
Priority to JP8175578A priority Critical patent/JPS5952658B2/en
Publication of JPS557874A publication Critical patent/JPS557874A/en
Publication of JPS5952658B2 publication Critical patent/JPS5952658B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Polyesters Or Polycarbonates (AREA)

Abstract

PURPOSE: The solid polycondensation of a polyester with specific amounts of terminal groups is effected to produce a high-polymerization-degree polyester with narrow polymerization degree distribution, readily melting uniformly and giving molded products free from pock mark and flow parttern.
CONSTITUTION: The melt polycondensation between dimethyl esters of aromatic dicarboxylic acids as terephthalic acid and glycols as ethylene glycol is effected to produce a prepolymer with methyl ester terminals of 6.5W13 (equivalene/106g polymer (hereinafter abbreviated to eq) and the total amount of the methyl ester terminals and free carboxyl groups of 30W45 eq and an intrinsic viscosity of 0.4W 0.7. The prepolymer is crashed into 3W15 mesh particles and is subjected to solid polycondensation at a temperature of 5W50°C lower than the melting point of the polymer under high vacuum to produce the objective polyester with polymerization degree.
COPYRIGHT: (C)1980,JPO&Japio
JP8175578A 1978-07-04 1978-07-04 Manufacturing method of high polymerization degree polyester Expired JPS5952658B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8175578A JPS5952658B2 (en) 1978-07-04 1978-07-04 Manufacturing method of high polymerization degree polyester

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8175578A JPS5952658B2 (en) 1978-07-04 1978-07-04 Manufacturing method of high polymerization degree polyester

Publications (2)

Publication Number Publication Date
JPS557874A true JPS557874A (en) 1980-01-21
JPS5952658B2 JPS5952658B2 (en) 1984-12-20

Family

ID=13755246

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8175578A Expired JPS5952658B2 (en) 1978-07-04 1978-07-04 Manufacturing method of high polymerization degree polyester

Country Status (1)

Country Link
JP (1) JPS5952658B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997000279A1 (en) * 1995-06-19 1997-01-03 Polyplastics Co., Ltd. Polyester resin and process for the production thereof
KR100392891B1 (en) * 2001-02-01 2003-07-28 주식회사 휴비스 Polyester binder fiber
JP2005255998A (en) * 2004-03-08 2005-09-22 Eastman Chem Co Polyester polymer particles with small surface versus central molecular weight gradient

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997000279A1 (en) * 1995-06-19 1997-01-03 Polyplastics Co., Ltd. Polyester resin and process for the production thereof
US5877262A (en) * 1995-06-19 1999-03-02 Polyplastics Co., Ltd. Polyester resin and process for the production thereof
KR100392891B1 (en) * 2001-02-01 2003-07-28 주식회사 휴비스 Polyester binder fiber
JP2005255998A (en) * 2004-03-08 2005-09-22 Eastman Chem Co Polyester polymer particles with small surface versus central molecular weight gradient

Also Published As

Publication number Publication date
JPS5952658B2 (en) 1984-12-20

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