JPS555942A - Preparation of saponified ethylene-vinyl acetate copolymer - Google Patents
Preparation of saponified ethylene-vinyl acetate copolymerInfo
- 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
Links
Landscapes
- 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
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)
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 |
-
1978
- 1978-06-29 JP JP7805778A patent/JPS555942A/en active Granted
Cited By (3)
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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