Polycarbonate/polyester composition and article prepared therefrom
OwnerLin Chen, Hongtao Shi +2inventors
InventorsLin Chen, Hongtao Shi, Shun Wan, Dake Shen
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Abstract
A composition includes specific amounts of an aromatic polycarbonate, a polycarbonate-polysiloxane block copolymer, a poly(alkylene terephthalate), a flame retardant, and a drip retardant. The flame retardant includes an oligomeric or polymeric bis(aryloxy)phosphazene in combination with an organophosphine oxide, an oligomeric or polymeric aromatic phosphonate, or a combination thereof. The composition is useful for fabricating parts for electrical and electronic devices.
Claims20
A composition comprising, based on the total weight of polymers and flame retardants,
- 25 to 75 weight percent of an aromatic polycarbonate;
- 10 to 40 weight percent of a polycarbonate-polysiloxane block copolymer;
- 10 to 30 weight percent of a poly(alkylene terephthalate);
- 5 to 20 weight percent of a flame retardant comprising
- 2 to 18 weight percent of an oligomeric or polymeric bis(aryloxy)phosphazene;
- and
- 2 to 18 weight percent of an organophosphine oxide, an oligomeric or polymeric aromatic phosphonate, or a combination thereof;
- and
- 0.05 to 5 weight percent of a drip retardant.
An article comprising a composition comprising, based on the total weight of polymers and flame retardants,
- 25 to 75 weight percent of an aromatic polycarbonate;
- 10 to 40 weight percent of a polycarbonate-polysiloxane block copolymer;
- 10 to 30 weight percent of a poly(alkylene terephthalate);
- 5 to 20 weight percent of a flame retardant comprising
- 2 to 18 weight percent of an oligomeric or polymeric bis(aryloxy)phosphazene;
- and
- 2 to 18 weight percent of an organophosphine oxide, an oligomeric or polymeric aromatic phosphonate, or a combination thereof;
- and
- 0.05 to 5 weight percent of a drip retardant.
(canceled)
Dependencies are inferred from the claim text.