JPS57108126A - Production of polyester - Google Patents

Production of polyester

Info

Publication number
JPS57108126A
JPS57108126A JP18313880A JP18313880A JPS57108126A JP S57108126 A JPS57108126 A JP S57108126A JP 18313880 A JP18313880 A JP 18313880A JP 18313880 A JP18313880 A JP 18313880A JP S57108126 A JPS57108126 A JP S57108126A
Authority
JP
Japan
Prior art keywords
polyester
mixture
compound
depolymerized
polycondensation tank
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
JP18313880A
Other languages
Japanese (ja)
Other versions
JPS646221B2 (en
Inventor
Seiji Sakamoto
Tetsuo Nishimura
Kazuo Endo
Tetsuya Sugita
Koichi Ikeyama
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.)
Diafoil Co Ltd
Original Assignee
Diafoil 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 Diafoil Co Ltd filed Critical Diafoil Co Ltd
Priority to JP18313880A priority Critical patent/JPS57108126A/en
Publication of JPS57108126A publication Critical patent/JPS57108126A/en
Publication of JPS646221B2 publication Critical patent/JPS646221B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Polyesters Or Polycarbonates (AREA)

Abstract

PURPOSE: To produce a polyester excellent in lubricity and transparency, by depolymerizing a preceding batch polyester remaining in a polycondensation tank with a specified compound and then, after addition of a P compound, polycondensing the mixture.
CONSTITUTION: A preceding batch polyester remaining in a polycondensation tank is mixed with at least one component selected from the group consisting of ethylene glycol, bis(β-hydroxyethyl) terephthalate and a lower polymer thereof and then depolymerized by keeping the mixture at 230W280°C for 15minW2hr. Next, to this depolymerized mixture is added an esterified or transesterified product from a dicarboxylic acid (lower alkyl ester) and a glycol, and the resulting mixture is polycondensed in the presence of a P compound, e.g., triethyl phosphate, to obtain a polyester which has structural components based on ethylene terephthalate units and which contains fine particles deposited in the reaction system.
COPYRIGHT: (C)1982,JPO&Japio
JP18313880A 1980-12-24 1980-12-24 Production of polyester Granted JPS57108126A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18313880A JPS57108126A (en) 1980-12-24 1980-12-24 Production of polyester

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18313880A JPS57108126A (en) 1980-12-24 1980-12-24 Production of polyester

Publications (2)

Publication Number Publication Date
JPS57108126A true JPS57108126A (en) 1982-07-06
JPS646221B2 JPS646221B2 (en) 1989-02-02

Family

ID=16130458

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18313880A Granted JPS57108126A (en) 1980-12-24 1980-12-24 Production of polyester

Country Status (1)

Country Link
JP (1) JPS57108126A (en)

Also Published As

Publication number Publication date
JPS646221B2 (en) 1989-02-02

Similar Documents

Publication Publication Date Title
US3936421A (en) Process of preparing polytetramethylene terephthalate
DE69512767D1 (en) METHOD FOR PRODUCING COPOLYESTERS
EP0234899A3 (en) Toner composition
CA2031611A1 (en) Process for increasing the direct esterification reaction rate of a diacid with a glycol
US3644291A (en) Titanium compounds as polycondensation catalysts in preparation of linear polyesters
DE2967205D1 (en) High solids polyol containing component and method for producing polyurethane resins thereof
JPS57108126A (en) Production of polyester
US3728287A (en) Hydrolyzing polyester
KR880003995A (en) Manufacturing method of copolyester
JPS57122078A (en) Preparation of macrocyclic ethylenedioate
JPS5550023A (en) Preparation of polyester
JPS5763328A (en) Preparation of polyester
JPS55161818A (en) Preparation of polyester
JPS55127431A (en) Production of polyester
JPS5738817A (en) Production of polyester/polyether copolymer
JPS5536211A (en) Preparation of polyester having excellent transparency
US3457239A (en) Process of preparing polyethylene terephthalate using lead fluoride as transesterification catalyst and as condensation catalyst
US3489721A (en) Process for preparing polyesters with cadmium,lead,zinc,or manganese-hydroxide as a transesterification catalyst
JPS57190019A (en) Preparation of polyester
US3415787A (en) Organo-antimony oxides and sulfides as polycondensation catalysts
US3475380A (en) Group i-a metal manganites,manganates,and cobaltites as polyester polycondensation catalysts
JPS5543128A (en) Production of polyester film with high transparency
JPS56104933A (en) Preparation of quick-crystallizable polyester
JPS5592730A (en) Production of branched polyester
JPS5783523A (en) Preparation of polyester composition