Patent GB-980888-A (GB)
Title: Improvements in or relating to polymers resistant to ultra-violet light
IPC: C08F20/16
Filed: 1962-10-12
Abstract: Ultra-violet radiation-resistant polymers are made by polymerizing monomers of the formulae: <FORM:0980888/C3/1> or <FORM:0980888/C3/2> wherein X represents an acryloxy, acryloxyalkyl, methacryloxy or methacryloxyalkyl group, and Y and Z represent hydrogen, halogen or alkyl, aryl, acryloxy or aralkyl radicals, e.g. phenyl 2-hydroxy-4-acryloxy, phenyl 2-hydroxy-4-methacryloxy, phenyl 2-hydroxy - 5 - acryloxy, phenyl 2 - hydroxy - 5 - methacryloxy, phenyl 2-hydroxy-acryloxy-methyl and phenyl 2-hydroxy-methacryloxy-methyl benzoates.  The monomers may be polymerized alone or in admixture with monomers such as styrene, methylstyrene methyl, ethyl, propyl, n-butyl, isobutyl, hexyl, 2-ethylexyl, octyl, lauryl and stearyl acrylates and methacrylates, acrylic and methacrylic acids, acrylamide, acrylonitrile, methacrylonitrile, vinyl and vinylidene chlorides, vinyl acetate, ethylene and propylene, and mixtures of such monomers.  The polymers may be prepared by bulk, solution, emulsion or suspension. The examples describe the copolymerization in aqueous emulsion in the presence of anionic emulsifiers and ammonium persulphate, and, if desired, sodium bisulphite, of:  (1) phenyl 2 - hydroxy - 5 - acryloxybenzoate, vinylidene chloride and ethyl acrylate; (2) as in (1) but using phenyl 2-hydroxy-4-acryloxy benzoate as the ultra-violet absorbing monomer; (3) as in (1) but using n-butyl acrylate in place of ethyl acrylate; (4) phenyl 2-hydroxy-5-acryl-oxymethylbenzoate, vinyl chloride and 2-ethylhexyl acrylate; and the polymerization in solution in ethyl acetate in the presence of benzoyl peroxide of:  (6) ethyl acrylate and 2-hydroxy-5-methacryloxymethyl benzoate; (7) phenyl 2-hydroxy-5-acryloxymethyl benzoate; and (8) methyl acrylate and phenyl 2-hydroxy-5-acryloxy benzoate. Specification 980,889 is referred to.ALSO:Surfaces of paper and glass are coated with ultra-violet radiation resistant polymers made by polymerizing monomers of the formulae:  <FORM:0980888/B1-B2/1> or <FORM:0980888/B1-B2/2> wherein X represents an acryloxy, acryloxyalkyl, methacryloxy or methacryloxyalkyl group, and Y and Z represent halogen, hydrogen or alkyl aryl, aralykyl, or acyloxy radicals, either alone, or in admixture with other copolymerizable monomers (see Division C3). The polymer may be applied to the substrate either as an aqueous emulsion or as a solution in an organic solvent.  The examples describe: (1) coating paper with an aqueous emulsion of a vinylidene chloride/ethyl acrylate/phenyl 2-hydroxy-5-acryloxymethyl benzoate copolymer; (2) as in (1) but using phenyl 2-hydroxy-4-acryloxymethyl benzoate as the ultra-violet absorbing monomer; (3) as in (1) but replacing ethyl acrylate by n-butyl acrylate; (4) coating paper with an aqueous emulsion of a vinyl chloride/2-ethylhexyl acrylate/phenyl 2-hydroxy-5-acryloxymethyl benzoate copolymer; (6) coating glass plates with an ethyl acetate solution of an ethyl acrylate/phenyl 2-hydroxy-5-methacryloxymethyl benzoate copolymer; (7) applying an ethyl acetate solution of poly-(phenyl 2-hydroxy-5-acryloxymethyl benzoate) to sheets of white paper which had been previously coated with a film of polyvinylidene chloride; and (8) as in (7), but using a methyl acrylate/phenyl-2-hydroxy-5-acryloxy benzoate copolymer. Specification 980,889 is referred to.