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US4404258A Color stabilized water-dispersed polyurethane coating on vinyl surfaces 失效
乙烯基表面上色稳定的水分散聚氨酯涂料

Color stabilized water-dispersed polyurethane coating on vinyl surfaces
摘要:
A polyurethane coated polyvinyl chloride or co-polymer which resists discoloration is provided by coating the substrate surface with an aqueous dispersed polyurethane treated with a mono-acid halide, mono-acid anhydride, carbethoxy cyclic imide or monoisocyanate. The coated composite even when subjected to temperatures in excess of 100 degrees C. for extended periods resists discoloration and remains thermo-color stable with extended use.
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