JPS5592730A - Production of branched polyester - Google Patents

Production of branched polyester

Info

Publication number
JPS5592730A
JPS5592730A JP156779A JP156779A JPS5592730A JP S5592730 A JPS5592730 A JP S5592730A JP 156779 A JP156779 A JP 156779A JP 156779 A JP156779 A JP 156779A JP S5592730 A JPS5592730 A JP S5592730A
Authority
JP
Japan
Prior art keywords
compound
intrinsic viscosity
polyester
prepolymer
polyfunctional compound
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
JP156779A
Other languages
Japanese (ja)
Inventor
Takashige Kato
Shingo Sasaki
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.)
Nippon Ester Co Ltd
Original Assignee
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 Nippon Ester Co Ltd filed Critical Nippon Ester Co Ltd
Priority to JP156779A priority Critical patent/JPS5592730A/en
Publication of JPS5592730A publication Critical patent/JPS5592730A/en
Pending legal-status Critical Current

Links

Landscapes

  • Polyesters Or Polycarbonates (AREA)

Abstract

PURPOSE: A prepolymer obtained by the melt polymerization of the reaction mixture containing a specific amount of a polyfunction compound is subjected to solid phase polycondensation reaction, the producing said polyester that can suitably used in direct blow molding because of its high melt viscosity with industrial advantage.
CONSTITUTION: In the production of a branched polyester mainly containing ethylene terephthalate units, a polyfunctional compound as trimelltic acid or pentaerythritol is added so that the amount satisfies equations I and II [b is the proportion of the polyfunctional compound in the copolymer (mol%); f is the number of functions of the polyfunctional compound, 3 or 4; V is the target intrinsic viscosity of the polyester] to produce a prepolymer of 0.4W0.8 intrinsic viscosity and the resulting prepolymer is subjected to solid phase polycondensation reaction to give said polymer with the target intrinsic viscosity. When needed, less than 10mol% of a difunctional compound as isophthalic acid, neopentyl glycol may be added as a copolymer component.
COPYRIGHT: (C)1980,JPO&Japio
JP156779A 1979-01-08 1979-01-08 Production of branched polyester Pending JPS5592730A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP156779A JPS5592730A (en) 1979-01-08 1979-01-08 Production of branched polyester

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP156779A JPS5592730A (en) 1979-01-08 1979-01-08 Production of branched polyester

Publications (1)

Publication Number Publication Date
JPS5592730A true JPS5592730A (en) 1980-07-14

Family

ID=11505090

Family Applications (1)

Application Number Title Priority Date Filing Date
JP156779A Pending JPS5592730A (en) 1979-01-08 1979-01-08 Production of branched polyester

Country Status (1)

Country Link
JP (1) JPS5592730A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63304023A (en) * 1987-06-03 1988-12-12 Toyobo Co Ltd Production of polyester

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63304023A (en) * 1987-06-03 1988-12-12 Toyobo Co Ltd Production of polyester

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