Patent ID: 6569957
Filing Date: 2003-05-27
Classification: C08L

Abstract:
A transparent film or sheet extruded from a blend composition comprising:(A) from about 15 to about 40 weight percent, based on the total blend composition, of at least one polycarbonate, and (B) from about 60 to about 85 weight percent, based on the total blend composition, 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-cyclohexane-dicarboxylic 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, the copolyester has an inherent viscosity of from about 0.5 to about 1.5 dL/g, determined in accordance with ASTM Test Method D2857-70, and the film or sheet is characterized by being thermoformable without previous drying.