GB626626A - Reversible gel composition and method of preparation - Google Patents
Reversible gel composition and method of preparationInfo
- Publication number
- GB626626A GB626626A GB25872/45A GB2587245A GB626626A GB 626626 A GB626626 A GB 626626A GB 25872/45 A GB25872/45 A GB 25872/45A GB 2587245 A GB2587245 A GB 2587245A GB 626626 A GB626626 A GB 626626A
- Authority
- GB
- United Kingdom
- Prior art keywords
- acrylic
- alpha
- gels
- compounds
- interpolymer
- 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
- C08F20/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride, ester, amide, imide or nitrile thereof
- C08F20/62—Monocarboxylic acids having ten or more carbon atoms; Derivatives thereof
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)
- Adhesives Or Adhesive Processes (AREA)
Abstract
Thermal reversible gels are formed by dissolving, at slightly elevated temperatures in water made alkaline and having a pH of 4 to 9, interpolymers of acrylic or alpha-substituted acrylic acid with an acrylic or alpha-substituted acrylic amide and cooling the solution until it gels. Gelatin in an amount less than that of the interpolymer may be added. Specified acrylic compounds include acrylic and methacrylic acids, acrylamide, methacrylamide, alpha-phenyl acrylamide and alpha-chloroacrylamide. Other vinyl compounds, e.g. acrylic acid esters or vinyl esters such as vinyl acetate, may be incorporated in the interpolymer. Interpolymers containing vinyl esters may be hydrolysed. Polymerization may be effected by heating at 20-100 DEG C. in the presence of a catalyst, e.g. benzoyl peroxide, ammonium persulphate, sodium perborate, percarbonic and perphosphoric acids, hydrogen peroxide and ozonides. The polymers may be later modified by esterification with a polybasic acid or a polyhydric alcohol such as ethylene glycol or glycerol. Suitable alkaline compounds to impart the required pH include the alkali metal hydroxides and carbonates, ammonium hydroxide, methylamine, ethylamine, triethylamine and pyridine. The gels may be used in photographic emulsions as protective colloids for sensitive materials, e.g. silver halides, as subbing layers, overcoatings or backings for films, as light filters, adhesives and thickening agents. Specification 626,625 is referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US626626XA | 1944-10-25 | 1944-10-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB626626A true GB626626A (en) | 1949-07-19 |
Family
ID=22044000
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB25872/45A Expired GB626626A (en) | 1944-10-25 | 1945-10-04 | Reversible gel composition and method of preparation |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB626626A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2153375A (en) * | 1983-12-21 | 1985-08-21 | Tondeo France Pappert Diff | Hair treatment compositions |
-
1945
- 1945-10-04 GB GB25872/45A patent/GB626626A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2153375A (en) * | 1983-12-21 | 1985-08-21 | Tondeo France Pappert Diff | Hair treatment compositions |
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