RADIATION CURABLE TRANSPARENT COATING COMPOSITIONS CONTAINING BASIC COLLOIDAL SILICA

摘要

RADIATION CURABLE TRANSPARENT COATING COMPOSITIONS CONTAINING BASIC COLLOIDAL SILICA What is disclosed is a process of improving the transparency of cured abrasion resistant coating compositions when basic dispersions of colloidal silica are used. The process involves adding organic acid to either basic dispersions of colloidal silica prior to combining with a mixture containing a Michael adduct or to a mixture containing a Michael adduct prior to combining with basic dispersions of colloidal silica. Never before have either basic dispersions of colloidal silica been treated with organic acid prior to combining with a acryloxy functional composition or have such amounts of specified organic acids been added to mixtures containing a Michael adduct.