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Surface-modified micaceous particulates having improved dispersibility in aqueous media
Surface-modified micaceous particulates having improved dispersibility in aqueous media
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机译:表面改性云母颗粒在水性介质中的分散性得到改善
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摘要
Compounds useful for improving the dispersibility of micaceous particulates in aqueous-based coating compositions comprise urethanes or ureas which are the reaction products of silylalkyl or silylaryl isocyanates with alcohols, amines, polyether alcohols or amine-terminated polyethers. The compounds may also be the reaction products of silylalkyl- or silylarylamines with half-blocked diisocyanates which are themselves the reaction products of a diisocyanate with an alcohol, amine, polyether alcohol or amine-terminated polyether.PPMicaceous particulates which have been surface modified by reaction with these compounds, as well as coating compositions comprising such surface- modified micaceous particulates, and coated substrates are also disclosed.
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