CURABLE FILM-FORMING COMPOSITIONS DEMONSTRATING BURNISH RESISTANCE AND LOW GLOSS, AND METHODS OF IMPROVING BURNISH RESISTANCE OF A SUBSTRATE

摘要

The present invention is directed to curable film-forming compositions comprising: (a) a polymeric binder comprising: (i) a polysiloxane having reactive functional groups and in which is dispersed protonated silica particles having an average particle size of 2 to 20 microns; and (ii) optionally, at least one additional polymeric resin different from the polysiloxane (i), having reactive functional groups; and (b) a curing agent containing functional groups that are reactive with the reactive functional groups of (i) and/or (ii). After application to a substrate as a coating and after curing, the curable film-forming composition demonstrates an initial 85° gloss of less than 30 and an increase in 85° gloss of no more than 10 gloss units when subjected to various ABRASION TEST METHODS as defined herein.;Also provided is a method of improving burnish resistance of a substrate using the curable film-forming compositions of the present invention.

主权项

1. A curable film-forming composition comprising:
(a) a polymeric binder comprising:
(i) a polysiloxane having reactive functional groups and in which is dispersed protonated silica particles having an average particle size of 2 to 20 microns, wherein the polysiloxane is present in the polymeric binder in an amount of at least 10 percent by weight based on the total weight of solids in the polymeric binder; and(ii) optionally at least one additional polymeric resin different from the polysiloxane (i), having reactive functional groups; and (b) a curing agent containing functional groups that are reactive with the reactive functional groups of (i), (ii), or both; wherein after application to a substrate as a coating and after curing, the curable film-forming composition demonstrates an initial 85° gloss of less than 30 and an increase in 85° gloss of no more than 10 gloss units when subjected to WET ABRASION TEST METHOD ONE.