GB566004A - Manufacture of polyvinyl acetal resins - Google Patents
Manufacture of polyvinyl acetal resinsInfo
- Publication number
- GB566004A GB566004A GB2289/43A GB228943A GB566004A GB 566004 A GB566004 A GB 566004A GB 2289/43 A GB2289/43 A GB 2289/43A GB 228943 A GB228943 A GB 228943A GB 566004 A GB566004 A GB 566004A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mixture
- polyvinyl alcohol
- polyvinyl
- acid
- 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.)
- 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
- C08F8/00—Chemical modification by after-treatment
- C08F8/28—Condensation with aldehydes or ketones
Landscapes
- Chemical & Material Sciences (AREA)
- General 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 acetals are prepared by adding under agitation a liquid aldehyde, having a water solubility not greater than 20 gms. per 10 gms. of water at 20 DEG C. under atmospheric pressure, to an aqueous solution of a polyvinyl alcohol at below 50 DEG C. in the presence of an acid catalyst, continuing the agitation whilst a polyvinyl acetal is precipitated and, further agitating, whilst the mixture is heated to a temperature above 50 DEG C. in the presence of a dispersing agent. The polyvinyl alcohol must be such that the residual vinyl ester does not exceed 30 per cent by weight of the polyvinyl alcohol, preferably the amount of residual ester is in the range 0.5-6.0 per cent. The dispersing agent may be added prior to the initial reaction. An accelerating agent may also be present. Preferably, the initial reaction is carried out at 20-30 DEG C. and the final treatment at 50-75 DEG C. Specified aldehydes are propionaldehyde, butyraldehyde, isobutyraldehyde, valeraldehyde and isovaleraldehyde. Dispersing agents listed are gelatine, methyl cellulose, starch, alkali metal salts of monoalkyl sulphuric acid esters of long chain fatty acids, e.g. " Duponal ME " (Na salt of a sulphonated mixture of normal primary aliphatic alcohols with lauryl alcohol predominating), " Avirol " (Registered Trade Mark) (salt of a mixture of cetyl and stearyl sulphates), long-chain sulphonic acids and their alkali metal salts, e.g. " Alkanol " (tri-isopropyl beta-naphthalene sulphonic acid), and " Tergitol " (Registered Trade Mark) (a secondary alcohol sulphate of 17 carbon atoms). Specified acid catalysts are sulphuric acid and sulphonic acids. Accelerating agents listed are the substances sold under the names " Duponal, " " Avirol, " " Alkanol " and " Tergitol " described above. Examples are given.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US566004XA | 1942-02-11 | 1942-02-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB566004A true GB566004A (en) | 1944-12-08 |
Family
ID=22005489
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2289/43A Expired GB566004A (en) | 1942-02-11 | 1943-02-11 | Manufacture of polyvinyl acetal resins |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB566004A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4696971A (en) * | 1983-06-14 | 1987-09-29 | Saint Gobain Vitrage | Process for the preparation of polyvinyl butyral having improved properties |
US5349014A (en) * | 1984-08-02 | 1994-09-20 | E. I. Du Pont De Nemours And Company | Process for the production of polyvinyl butyral having improved properties |
US20130148263A1 (en) * | 2010-08-19 | 2013-06-13 | Kuraray Co., Ltd | Polyvinyl acetal resin, slurry composition prepared therefrom, ceramic green sheet, and multilayer ceramic capacitor |
CN114456283A (en) * | 2022-01-03 | 2022-05-10 | 浙江德斯泰新材料股份有限公司 | Water-based PVB emulsion and preparation method thereof |
CN116199807A (en) * | 2022-12-30 | 2023-06-02 | 安徽皖维先进功能膜材料研究院有限公司 | Polyvinyl acetal molecular sequence distribution regulation and control method and polyvinyl acetal resin |
-
1943
- 1943-02-11 GB GB2289/43A patent/GB566004A/en not_active Expired
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4696971A (en) * | 1983-06-14 | 1987-09-29 | Saint Gobain Vitrage | Process for the preparation of polyvinyl butyral having improved properties |
US5349014A (en) * | 1984-08-02 | 1994-09-20 | E. I. Du Pont De Nemours And Company | Process for the production of polyvinyl butyral having improved properties |
US20130148263A1 (en) * | 2010-08-19 | 2013-06-13 | Kuraray Co., Ltd | Polyvinyl acetal resin, slurry composition prepared therefrom, ceramic green sheet, and multilayer ceramic capacitor |
CN105175590A (en) * | 2010-08-19 | 2015-12-23 | 株式会社可乐丽 | Polyvinyl acetal resin |
US9550909B2 (en) | 2010-08-19 | 2017-01-24 | Kuraray Co., Ltd. | Polyvinyl acetal resin, slurry composition prepared therefrom, ceramic green sheet, and multilayer ceramic capacitor |
CN105175590B (en) * | 2010-08-19 | 2017-10-03 | 株式会社可乐丽 | Polyvinyl acetal resin |
CN114456283A (en) * | 2022-01-03 | 2022-05-10 | 浙江德斯泰新材料股份有限公司 | Water-based PVB emulsion and preparation method thereof |
CN116199807A (en) * | 2022-12-30 | 2023-06-02 | 安徽皖维先进功能膜材料研究院有限公司 | Polyvinyl acetal molecular sequence distribution regulation and control method and polyvinyl acetal resin |
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