Weatherable blends of polycarbonates with arylate polymers
AssigneeGeneral Electric Company
InventorsJimmy Lynn Webb, Randall Lee Carter, Tiberiu Mircea Siclovan, James Edward Pickett
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Abstract
Weatherability of polycarbonates, or of blends of polycarbonates with other polymers such as polyesters, is improved by incorporating therein a thermoplastic arylate polymer comprising units derived from a resorcinol or alkylresorcinol isophthalate-terephthalate. These units may be combined with units derived from a resorcinol or alkylresorcinol ester of a C.sub.4-12 aliphatic, alicyclic or mixed aliphatic-alicyclic dicarboxylic acid, such as sebacic acid.
Claims19
A resinous composition comprising a polycarbonate in the amount of at least about 30% by weight and a minor proportion, effective to improve color stability or gloss retention, of a thermoplastic arylate polymer consisting of structural units derived from a resorcinol or alkylresorcinol isophthalate-terephthalate, wherein the isophthalate and terephthalate units are present in a molar ratio in the range of about 0.9-1.1:1.
A resinous composition comprising at least about 30% by weight of a polycarbonate and a minor proportion, effective to improve color stability or gloss retention, of a thermoplastic arylate polymer which is a polyester consisting of structural units derived from resorcinol isophthalate-terephthalate of the formula ##STR4## wherein R.sup.1 is hydrogen or C.sub.1-4 alkyl, and the isophthalate and terephthalate units are present in a molar ratio in the range of about 0.9-1.1:1.
A resinous composition comprising at least about 30% by weight of a polycarbonate and a minor proportion, effective to improve color stability or gloss retention, of a thermoplastic arylate polymer consisting of first structural units derived from a resorcinol or alkylresorcinol isophthalate, in combination with second structural units derived from a resorcinol or alkylresorcinol ester of a C.sub.8-12 straight chain aliphatic dicarboxylic acid, wherein said arylate polymer has a ratio of first to second structural units between 8.5:1.5 and 9.5:0.5.
A resinous composition comprising at least about 30% by weight of a polycarbonate and a minor proportion, effective to improve color stability or gloss retention, of a thermoplastic arylate polymer consisting of first structural units derived from a resorcinol isophthalate, in combination with second structural units derived from a resorcinol sebacate, wherein said arylate polymer has a ratio of first to second structural units between 8.5:1.5 and 9.5:0.5.
Dependencies are inferred from the claim text.