Flame retardant polycarbonate compositions, methods of manufacture thereof and articles comprising the same
AssigneeSabic Global Technologies B.V.
InventorsMingfeng Li, Liang Wen, Wei Shan, Yuzhen Xu, Jian Yang
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Abstract
Disclosed herein is a flame retardant composition comprising 10 to 90 weight percent of a linear polycarbonate; 5 to 50 weight percent of a polysiloxane-polycarbonate copolymer; where the polysiloxane-polycarbonate copolymer comprises 10 weight percent or more of polysiloxane and where the molecular weight of the polysiloxane is 30,000 grams per mole or greater; and 1 to 20 weight percent of a phosphazene compound; where all weight percents are based on the total weight of the composition.
Claims22
A flame retardant composition comprising:
- 10 to 90 weight percent of a linear polycarbonate;
- 5 to 50 weight percent of a polysiloxane-polycarbonate copolymer;
- where the polysiloxane-polycarbonate copolymer comprises 10 weight percent or more of polysiloxane and where the weight average molecular weight of the polysiloxane is 30,000 grams per mole or greater;
- and
- 1 to 20 weight percent of a phosphazene compound;
- where all weight percents are based on the total weight of the composition;
- and wherein a molded flame retardant composition is opaque.
A method of manufacturing a flame retardant composition comprising:
- blending 10 to 90 weight percent of a linear polycarbonate;
- 5 to 50 weight percent of a polysiloxane-polycarbonate copolymer;
- where the polysiloxane-polycarbonate copolymer comprises 10 weight percent or more of polysiloxane and where the weight average molecular weight of the polysiloxane is 30,000 grams per mole or greater;
- and
- 1 to 20 weight percent of a phosphazene compound;
- where all weight percents are based on the total weight of the composition;
- to form a flame retardant composition;
- and wherein a molded flame retardant composition is opaque.
Dependencies are inferred from the claim text.