Support sheet with sensitized coating of organic acid substance and organic high molecular compound particulate mixture
AssigneesSanko Chemical Company Ltd., Kanzaki Paper Manufacturing Co., Ltd.
InventorsToranosuke Saito, Jujiro Kohno, Daiichiro Tanaka, Shinichi Oda
Life of this patent
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Abstract
A sensitized sheet for a pressure sensitive copy system is obtained by coating the surface of a support with an acceptor composition comprising a particulate mixture comprising an organic acid substance selected from the group consisting of aromatic carboxylic acids and polyvalent metal salts thereof, and an organic high molecular compound. The above coating composition may further contain an inorganic solid particle such as oxides, hydroxides and carbonates of a polyvalent metal, and other mineral pigments. The coating procedure may be carried out with use of coating means mounted on the conventional paper machines.
Claims21
A sheet material for use in a pressure-sensitive copy system, comprising a support sheet and a coating thereon sensitized to produce color on contact with a chromogenic material, said coating containing a particulate mixture having uniformly dispersed therein in the form of fine powders comprising (a) 100 parts by weight of an acidic organic substance selected from the group consisting of aromatic carboxylic acids and polyvalent metal salts thereof, and (b) from 5 to 300 parts by weight of an organic high molecular compound selected from the group consisting of polystyrene, styrene copolymers, a-methylstyrene polymers, a-methylstyrene copolymers, polyvinyl chloride, vinylchloride copolymers, vinylidenechloride copolymers, polychloroprene, cyclopentadiene polymers, cyclopentadiene copolymers, acrylic ester polymers, acrylic ester copolymers, acrylic acid copolymers, methacrylic ester polymers, methacrylic ester copolymers, methacrylic acid copolymers, vinyl acetate polymers, vinyl acetate copolymers such as ethylene-vinylacetate copolymers, acrylonitrile copolymers, acrylamide copolymers, allylalcohol copolymers, benzylchloride polycondensation products, benzylchloride copolycondensation products, meta-xylene-formaldehyde condensates, diphenyl-formaldehyde condensates, and diphenyl-meta-xylene-formaldehyde copolycondensation products, said organic high molecular compound having a molecular weight of at least 400 and in a non-fluid or solid state at normal temperature, and being compatible with said acidic organic substance.
Dependencies are inferred from the claim text.