COATING COMPOSITIONS COMPRISING A BLOCKED ISOCYANATE SILANE

摘要

Disclosed herein are stable organosiloxane coating compositions comprising a blocked isocyanate silane and at least one polyol that provide abrasion resistant coatings for transparent polymer substrates. The cured coatings also have excellent adhesion to the polymer substrates. In accordance with certain embodiments, the disclosed coating compositions, which when cured on the substrate, provide formable, weatherable, anti-fog, or combinations of formable, weatherable, or anti-fog organosiloxane coatings. Also disclosed herein are articles comprising coatings cured from such coating compositions, and processes for making the coating compositions.

主权项

1. A coating composition which forms an abrasion resistant coating on a substrate, the coating composition comprising:
(a) a blocked isocyanate silane represented by the formula: wherein R1 is an alkyl group having from 1 to 10 carbon atoms,wherein R2 is an alkyl group having from 1 to 20 carbon atoms,wherein R3 is an alkyl group having from 1 to 5 carbon atoms,wherein R4 is an alkyl group having from 1 to 5 carbon atoms,wherein m is an integer selected from 1, 2, or 3,wherein n is an integer selected from 2 to 6; and (b) at least one polyol.