POLYESTER-POLYCARBONATE COMPOSITIONS

Disclosed are polymer compositions comprising: (A) a first component comprising about 1 to 99 percent by weight at least one polyester (A) comprising: (1) diacid residues selected from the group consisting of terephthalic acid residues, isophthalic acid residues and mixtures thereof, and (2) diol residues selected from the group consisting of 1 ,4-cyclohexanedimethanol residues, ethylene glycol residues and mixtures thereof; wherein the molar ratio of 1 ,4-cyclohexanedimethanol to ethylene glycol is less than 0.50; (B) a second component comprising about 99 to 1 percent by weight of a miscible blend of: (1 ) at least one polycarbonate (B) of bisphenol A (2) at least one polyester (C) comprising (a) diacid residues selected from the group consisting of terepthalic acid residues, isophthalic acid residues and mixture thereof, and (b) diol residues selected from the group consisting of 1 , 4- cyclohexanedimethanol residues, ethylene glycol residues, and mixtures thereof; wherein the molar ratio of 1 ,4- cyclohexanedimethanol to ethylene glycol is 0.50 or greater, and, wherein the total weight percent for the first component and for the second component is equal to 100 weight percent; and wherein the total weight percent for the second componen of polycarbonate (B) and polyester (C) is equal to 100 weight percent; and wherein the first component and second component have refractive indices which differ in absolute value by 0.008 or less; and wherein the total mole percent of the diacid residues of each of polyesters (?) and polyester (C) individually is equal to 100 mole percent; and wherein the total mole percent of the diol residues of each of polyesters (A) and polyester (C) individually is equal to 100 mole percent. La présente invention concerne décomposition polymère comprenant: (A) un premier composant comprenant entre environ 1 % et 99 % en masse au moins d'un polyester (A) comprenant: (1) des résidus diacides sélectionnés dans le groupe constitué de résidus acides téréphtaliques, résidus acides isophtaliques et des mélanges de ceux-ci et, (2) des résidus diol sélectionnées dans le groupe constitué de résidus1,4-cyclohexanediméthanol, résidus éthylène glycol et des mélanges de ceux-ci, le rapport molaire de 1,4-cyclohexanediméthanol sur éthylène glycol étant inférieur à 0.50; (B) un second composant comprenant entre environ 99 % et 1 % en masse d'un mélange miscible de: (1) au moins un polycarbonate (B) de biphénol A (2), au moins un polyester (C) comp