GB900571A - Improvements in and relating to polyvinyl compounds - Google Patents
Improvements in and relating to polyvinyl compoundsInfo
- Publication number
- GB900571A GB900571A GB2728058A GB2728058A GB900571A GB 900571 A GB900571 A GB 900571A GB 2728058 A GB2728058 A GB 2728058A GB 2728058 A GB2728058 A GB 2728058A GB 900571 A GB900571 A GB 900571A
- Authority
- GB
- United Kingdom
- Prior art keywords
- polymerization
- polyvinyl
- radiation
- prepared
- degree
- 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.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F18/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an acyloxy radical of a saturated carboxylic acid, of carbonic acid or of a haloformic acid
- C08F18/02—Esters of monocarboxylic acids
- C08F18/04—Vinyl esters
- C08F18/08—Vinyl acetate
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
Polyvinyl acetate having a substantially stable degree of polymerization when subjected to alcoholysis is prepared by subjecting vinyl acetate to ionizing radiation in the absence of oxygen or other such reactive substance at a temperature below that at which thermal polymerization occurs, e.g. below 50 DEG C. Polyvinyl alcohol of corresponding degree of polymerization is prepared by hydrolysis. In an example vinyl acetate is irradiated under vacuum with 225,000 roentgen equivalent physical of gamma radiation from a cobalt 60 source at 0 DEG C. and the polyvinyl acetate obtained from a 25% conversion of the monomer. The polymer was hydrolysed in ethyl alcohol by sodium hydroxide to yield a polyvinyl alcohol having an average degree of polymerization of 4,700. Alpha, beta or X-radiation may alternatively be employed. U.S.A. Specification 2,499,924 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US68064357A | 1957-08-27 | 1957-08-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB900571A true GB900571A (en) | 1962-07-11 |
Family
ID=24731915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2728058A Expired GB900571A (en) | 1957-08-27 | 1958-08-26 | Improvements in and relating to polyvinyl compounds |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB900571A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4463138A (en) * | 1982-09-30 | 1984-07-31 | Allied Corporation | High molecular weight poly(vinyl acetate) and poly(vinyl alcohol) and processes for their production |
| JPS61108603A (en) * | 1984-11-02 | 1986-05-27 | Nippon Synthetic Chem Ind Co Ltd:The | Dispersion stabilizer |
| US4820767A (en) * | 1984-11-23 | 1989-04-11 | Allied-Signal Inc. | Process for the production of poly(vinyl acetate) and poly(vinyl alcohol) |
-
1958
- 1958-08-26 GB GB2728058A patent/GB900571A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4463138A (en) * | 1982-09-30 | 1984-07-31 | Allied Corporation | High molecular weight poly(vinyl acetate) and poly(vinyl alcohol) and processes for their production |
| JPS61108603A (en) * | 1984-11-02 | 1986-05-27 | Nippon Synthetic Chem Ind Co Ltd:The | Dispersion stabilizer |
| US4820767A (en) * | 1984-11-23 | 1989-04-11 | Allied-Signal Inc. | Process for the production of poly(vinyl acetate) and poly(vinyl alcohol) |
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