GB626626A - Reversible gel composition and method of preparation - Google Patents

Reversible gel composition and method of preparation

Info

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
Application number
GB25872/45A
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.)
GAF Chemicals Corp
Original Assignee
General Aniline and Film Corp
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 General Aniline and Film Corp filed Critical General Aniline and Film Corp
Publication of GB626626A publication Critical patent/GB626626A/en
Expired legal-status Critical Current

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

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.
GB25872/45A 1944-10-25 1945-10-04 Reversible gel composition and method of preparation Expired GB626626A (en)

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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2153375A (en) * 1983-12-21 1985-08-21 Tondeo France Pappert Diff Hair treatment compositions

Cited By (1)

* Cited by examiner, † Cited by third party
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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