COLOR DEVELOPING SHEET FOR PRESSURE-SENSITIVE RECORDING SYSTEMS

摘要

COLOR DEVELOPING SHEET FOR PRESSURE-SENSITIVE RECORDING SYSTEMS Absract of the Disclosure In this invention a color developer sheet sensitized for color development on contact with a chromogenic material is improved in the light-resistance of the developed color. The sheet comprises a support sheet and a color developer coating layer comprising an organic color developer and, as a binder, an effective amount of a latex of a copolymer prepared by the polymerization of a mixture consisting essentially of about 20 to 70 % by weight of one or more aliphatic conjugated diolefin monomers, about 0.5 to 15 % by weight of one or more unsaturated mono- or di- carboxylic acid monomers or the corresponding monoalkyl esters or anhydrides and about 15 to 79.5 % by weight of one or more other olefin monomers copolymerizable therewith, the copolymer having a gel content of about 95 to 100 % by weight.