Patent ID: 8361607
Filing Date: 2013-01-29
Classification: C08J,Y10T

Abstract:
1. An organic resin laminate having UV-shielding property and high mar resistance at a surface, comprising an organic resin substrate and a multilayer coating system on a surface of the substrate, the multilayer coating system including an outermost layer (I) which is a hard film resulting from plasma polymerization of an organosilicon compound and a lower layer (II) disposed contiguous to the outermost layer which is a cured film of a silicone coating composition, said silicone coating composition comprising (2-A) composite oxide nanoparticles obtained by coating surfaces of zinc oxide nanoparticles, titanium oxide nanoparticles or a combination thereof with a member selected from the group consisting of oxides and hydroxides of Al, Si, Zr and Sn and having no photocatalytic activity or a photocatalytic degradability of up to 25%, wherein the photocatalytic degradability (PD) is determined by irradiating black light to a methylene blue solution having said composite oxide nanoparticles uniformly dispersed therein for 12 hours, measuring the absorbance of the solution at 653 nm before and after the black light irradiation, and calculating according to the following formula: wherein A 0 is the initial absorbance and A is the absorbance after the black light irradiation, (2-B) a silicone resin obtained by (co)hydrolyzing, condensing or (co)hydrolyzing-condensing a member selected from alkoxysilanes and partial hydrolytic condensates thereof, said alkoxysilane having the following general formula (1): wherein R 1 and R 2 are each independently hydrogen or a substituted or unsubstituted monovalent hydrocarbon group, and R 1 and R 2 may bond together, R 3 is an alkyl group having 1 to 3 carbon atoms, and m and n are independently 0 or 1 and m+n is 0, 1 or 2, (2-C) a curing catalyst, and (2-D) a solvent, the solids content of composite oxide nanoparticle dispersion (2-A) being 1 to 50% by weight based on the solids content of silicone resin (2-B).