Polyester-polycarbonate composition and article
AssigneeSabic Global Technologies B.V.
InventorsLin Chen, Bing Guan, Huanbing Wang, Dongbo Xing, Shun Wan, Dake Shen
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Abstract
A composition includes specific amounts of an aromatic polycarbonate, a block polycarbonate-polysiloxane, a poly(alkylene terephthalate), a block polyestercarbonate, and an organophosphate ester. Relative to a corresponding composition lacking the block polyestercarbonate, the composition exhibits improved solvent resistance while substantially maintaining impact strength, melt flow, and flame retardancy. The composition is useful for fabricating articles that may come into contact with liquid chemicals or chemical vapors.
Claims16
A composition comprising, based on the total weight of the composition:
- 5 to 50 weight percent of an aromatic polycarbonate;
- 10 to 40 weight percent of a block polycarbonate-polysiloxane;
- 5 to 35 weight percent of a poly(alkylene terephthalate);
- 5 to 50 weight percent of a block polyestercarbonate comprising
- a polyester block comprising resorcinol ester repeat units having the structure
- and
- a polycarbonate block comprising carbonate repeat units having the structure
- wherein at least 60 percent of the total number of R1 groups are aromatic;
- and
- 4 to 20 weight percent of an organophosphate ester.
An article comprising a composition comprising, based on the total weight of the composition:
- 5 to 50 weight percent of an aromatic polycarbonate;
- 10 to 40 weight percent of a block polycarbonate-polysiloxane;
- 5 to 35 weight percent of a poly(alkylene terephthalate);
- 5 to 50 weight percent of a block polyestercarbonate comprising
- a polyester block comprising resorcinol ester repeat units having the structure
- and
- a polycarbonate block comprising carbonate repeat units having the structure
- wherein at least 60 percent of the total number of R1 groups are aromatic;
- and
- 4 to 20 weight percent of an organophosphate ester.
Dependencies are inferred from the claim text.