GB1259608A - - Google Patents

Abstract

1,259,608. Gelatine coated material. EASTMAN KODAK CO. 8 Nov., 1968 [13 Nov., 1967], No. 53118/68. Heading B2E. [Also in Divisions G2 and H5] A coated material comprises a support coated with a plurality of gelatin layers one of which is substantially unhardened (defined as being removable by applying water between 70‹ and 140‹F. and, if necessary mechanical agitation) and another of which is hardened with a non-polymeric compound containing a plurality of reactive groups each of which is an ethylenically unsaturated acyl, alpha-halo saturated acyl or unsubstituted or substituted maleimide group. Preferred hardness are those of formulµ wherein R is hydrogen, aliphatic or aromatic, R<SP>1</SP> is alkyl with 1-4 carbon atoms, R<SP>2</SP> and R<SP>3</SP> are hydrogen or alkyl with up to 8 carbon atoms, R<SP>5</SP> is hydrogen or alkyl up to 4 carbon atoms, A is oxygen or R<SP>4</SP>N= or R<SP>4</SP> 2 N=X- with R<SP>4</SP> being an alkyl group having up to 4 carbon atoms, 2 is a saturated or unsaturated aliphatic radical from 1-10 carbon atoms which may be interrupted by ether, sulphur or amide links or alkylene or cycloalklene radicals or 2 may form with A a heterocyclic ring, m is 1 or 2, n is 2 to 6, p is 1 to 4, X is an anion and Y is a single hetero atom such as oxygen or tertiary nitrogen. The gelatin layers may also contain other protein colloids, vinyl or acrylic polymers or cellulose derivatives. The materials are use in photographic materials (see Divisions G2 and H5).