Polyester-polycarbonate compositions

Details Polyester-polycarbonate compositions Polyester-polycarbonate compositions

2007-06-05

2007-06-05

Boykin, Terressa (Department: 1711)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From carboxylic acid or derivative thereof

C422S411000, C422S412000, C525S067000, C525S068000, C525S069000, C525S166000, C525S437000, C525S439000, C528S271000

Reexamination Certificate

active

11179428

ABSTRACT:
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 terephthalic 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 component 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 (A) 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.

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