JPS555942A - Preparation of saponified ethylene-vinyl acetate copolymer - Google Patents

Preparation of saponified ethylene-vinyl acetate copolymer

Info

Publication number
JPS555942A
JPS555942A JP7805778A JP7805778A JPS555942A JP S555942 A JPS555942 A JP S555942A JP 7805778 A JP7805778 A JP 7805778A JP 7805778 A JP7805778 A JP 7805778A JP S555942 A JPS555942 A JP S555942A
Authority
JP
Japan
Prior art keywords
vinyl acetate
ether
copolymer
acetate copolymer
alcohol
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
JP7805778A
Other languages
Japanese (ja)
Other versions
JPS5615803B2 (en
Inventor
Mitsutaka Saito
Shinichi Sato
Nobuo Morishita
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.)
Tosoh Corp
Original Assignee
Toyo Soda Manufacturing 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 Toyo Soda Manufacturing Co Ltd filed Critical Toyo Soda Manufacturing Co Ltd
Priority to JP7805778A priority Critical patent/JPS555942A/en
Publication of JPS555942A publication Critical patent/JPS555942A/en
Publication of JPS5615803B2 publication Critical patent/JPS5615803B2/ja
Granted legal-status Critical Current

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  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)

Abstract

PURPOSE: To obtain the title saponified copolymer having improved transparency, by saponifying an ethylene-vinyl acetate copolymer in the presence of an alkali catalyst in a mixture of an alcohol and an ether as a medium.
CONSTITUTION: An ethylene-vinyl acetate copolymer with a vinyl acetate content ≤70wt.% is uniformly saponified in the presence of an alkali catalyst in a mixture of a lower alcohol and a 4W10C ether as a medium in the heterogeneous system while retaining the original copolymer shape. A ≤3C ether having a poor swelling ability, a low boiling point, and high volatility is undesivable. A ≥11C ether causes undesirably the cohesion of the copolymer. The weight ratio of the ether to alcohol is 5:95W90:10, preferably 20:80W70:30.
COPYRIGHT: (C)1980,JPO&Japio
JP7805778A 1978-06-29 1978-06-29 Preparation of saponified ethylene-vinyl acetate copolymer Granted JPS555942A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7805778A JPS555942A (en) 1978-06-29 1978-06-29 Preparation of saponified ethylene-vinyl acetate copolymer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7805778A JPS555942A (en) 1978-06-29 1978-06-29 Preparation of saponified ethylene-vinyl acetate copolymer

Publications (2)

Publication Number Publication Date
JPS555942A true JPS555942A (en) 1980-01-17
JPS5615803B2 JPS5615803B2 (en) 1981-04-13

Family

ID=13651216

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7805778A Granted JPS555942A (en) 1978-06-29 1978-06-29 Preparation of saponified ethylene-vinyl acetate copolymer

Country Status (1)

Country Link
JP (1) JPS555942A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5240997A (en) * 1991-01-18 1993-08-31 Kuraray Co., Ltd. Process for producing ethylene-vinyl alcohol copolymers
US5955538A (en) * 1998-02-18 1999-09-21 At Plastics Inc. Process for the manufacture of ethylene/vinyl acetate/vinyl alcohol terpolymer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5240997A (en) * 1991-01-18 1993-08-31 Kuraray Co., Ltd. Process for producing ethylene-vinyl alcohol copolymers
US5352750A (en) * 1991-01-18 1994-10-04 Kuraray Co., Ltd. Process for producing ethylene-vinyl ester copolymers, ethylene-vinyl alcohol copolymers, and process for producing shaped articles therefrom
US5955538A (en) * 1998-02-18 1999-09-21 At Plastics Inc. Process for the manufacture of ethylene/vinyl acetate/vinyl alcohol terpolymer

Also Published As

Publication number Publication date
JPS5615803B2 (en) 1981-04-13

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