Flame retardant polycarbonate polyester composition
AssigneeGeneral Electric Company
InventorsJohannes Martinus D. Goossens, Walter C. M. van der Heijden, Gabrie Hoogland, Johannes Jacobus M. de Moor, Hendrik Verhoogt
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Abstract
A transparent/translucent flame redardant composition comprises a uniform blend of a miscible resin blend of a polycarbonate resin and a cycloaliphatic polyester resin wherein the composition has at least a 80% pass rate in 10 test specimen in the Norme Francaise NF-P-92-505 flammability test of L'Association Francaise de Normalisation using test specimens with weight between about 1.0 to about 6.0 kilograms per square meter.
Claims19
A flame retardant composition having a transmittance of greater than or equal to 80% comprising a uniform, miscible blend of
- a polycarbonate resin;
- a cycloaliphatic polyester resin, said cycloaliphatic resin comprising residues of a cyclic or straight chain aliphatic C2-C20 diol and residues of a cyclic or straight chain aliphatic C6-C20 diacid, wherein at least 80% of the residues are residues of a cyclic diol, or diacid, and wherein the weight ratio of polycarbonate resin to polyester resin is from 99/1 to 98/2;
- and
- a stabilizer selected from the group consisting of phosphorus oxo acids, acid organo phosphates, acid organo phosphites, acid phosphate metal salts, acidic phosphite metal salts and mixtures thereof.
Dependencies are inferred from the claim text.