Patent ID: 6641920
Filing Date: 2003-11-04
Classification: B32B,C08K,C08L,Y10T

Abstract:
An ultraviolet protected multi-layer structure comprising:an ultraviolet protective layer comprising at least one, or more, ultraviolet absorbing compound and at least one, or more, first polycarbonate; and a polymeric layer adjacent to the ultraviolet protective layer, the polymeric layer comprising a blend comprising (A) from about 15 to about 40 weight percent, based on the total blend, of at least one second polycarbonate, and (B) from about 60 to about 85 weight percent, based on the total blend, of at least one copolyester comprising (a) an acid component comprising from about 65 to about 85 mol percent of a dicarboxylic acid selected from the group consisting of terephthalic acid, naphthalenedicarboxylic acid, 1,4-cyclohexanedicarboxylic acid and mixtures thereof; from about 15 to about 35 mol percent isophthalic acid; and from about 0 to about 20 mol percent of other dicarboxylic acid units having from about 4 to about 40 carbon atoms, wherein the total mol percent of dicarboxylic acid units is equal to 100 mol percent; and (b) a glycol component comprising from about 80 to 100 mol percent of 1,4-cyclohexanedimethanol and from 0 to about 20 mol percent of other glycol units having from about 3 to about 12 carbon atoms, wherein the total mol percent of glycol units is equal to 100 mol percent; wherein the total units of the copolyester is equal to 200 mol percent.