Patent GB-1386121-A (GB)
Title: Photohardenable compositions
IPC: C08F299/04
Filed: 1972-01-26
Abstract: 1386121 Fatty acid-modified vinylated polyester compositions KANSAI PAINT CO Ltd 26 Jan 1972 [1 Feb 1971] 3588/72 Headings C3P and C3R A photohardenable fatty acid-modified vinylated polyester resin composition comprises (A) 10-60% by weight of a vinyl or vinylidene monomer or mixtures thereof, (B) 40-90% by weight of a fatty acid-modified vinylated polyester resin prepared by (1) reacting 0À7-1À3 moles of vinyl or vinylidene monomer having a hydroxyl group with respect to 1À0 mole of diisocyanate compound to provide an isocyanate adduct, and then (2) reacting 0À4-1À2 moles of the isocyanate adduct with respect to 1À0 equivalent of a pendant hydroxyl group of a fatty acid-modified polyester resin to obtain a fatty acid-modified vinylated polyester resin having 0À2-3À0 α,#-olefinic unsaturation units per 1000 units molecular weight of the resin, in which the fatty acid-modified polyester resin has a number average molecular weight of 800-5000, a fatty acid content of 5-35% by weight based on the total weight of the fatty acid and unmodified polyester resin, a number of hydroxyl groups of 0À5-3À0 units per 1000 units molecular weight and an acid value of 5-30, (C) a metal salt dryer which is a cobalt, lead, manganese, out calcium, zinc, iron, zirconium, cerium or copper salt of naphthenic acid, octoic acid, linseed oil fatty acid, soy bean oil fatty acid or tall oil fatty acid, in an amount of 0À1-2À0% by weight as metal based on the total weight of the fatty acid-modified vinylated polyester resin and vinyl or vinylidene monomer and (D) 0À05-10% by weight based on the total weight of the fatty acid-modified vinylated polyester and vinyl or vinylidene monomer of a photosensitizer which is (a) benzoin or a derivative thereof of the formula in which R 1  is hydrogen, a C 1-18  alkyl radical, a methylcyclohexyl or benzyl radical or ethylether derivative radical of the formula in which R 4  and R 5  are hydrogen or methyl, R 6  is a C 1-4  alkoxy or acetoyl radical or an alkoxy alkoxy radical having up to 6 carbon atoms, R 2  is hydrogen or a methoxy or dimethylamino radical and R 3  is hydrogen or a methoxy radical, (b) an azo compound of the formula R 7 -N = N-R 8  in which R 7  is in which R 9  is hydrogen, chlorine or C 1-8  alkyl, X is hydrogen, chlorine or bromine and in which R 10  is hydrogen, methyl or C 1-4  alkoxy and R 11  is hydrogen, methyl or C 1-4  alkoxy and R 11  is hydrogen or a nitrile radical or (c) a diphenyl disulphide or derivative thereof of the formula in which R 12  and R<SP>1</SP> 12  are hydrogen, methyl or chlorine, R 13  and R<SP>1</SP> 13  are hydrogen or methyl, R 14  and R<SP>1</SP> 14  are hydrogen, chlorine, C 1-14  alkyl or methoxy, R 15  and R<SP>1</SP> 15  are hydrogen, chlorine or methyl and R 16  and R<SP>1</SP> 16  are hydrogen or methyl. In examples the vinyl or vinylidene monomers used are methyl acrylate, ethyl acrylate, methyl methacrylate and styrene, the fatty acid-modified vinylated polyesters are those prepared by the reaction of an isocyanate adduct produced by the reaction of tolylene diisocyanate or hexamethylene diisocyanate with 2-hydroxyethyl methacrylate, with a fatty acid-modified polyester resin produced by the reaction of isophthalic acid, adipic acid neopentyl glycol, trimethylol propane and linseed oil fatty acid or highly conjugated linoleic acid or of fumaric acid, isophthalic acid, adipic acid, neopentyl glycol, trimethylol propane and linseed oil fatty acid, the photosensitizers are benzoin, benzoin ethyl ether or benzoin methyl ether and the metal salt dryers are cobalt and lead naphthenates.