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US 2014/0275366 A1Published application
Filled polycarbonate compositions
AssigneeBayer MaterialScience AG
InventorsJose L. Chirino, James P. Mason, Bruce L. Hager, Marina Rogunova
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Abstract
Flame-retardant polycarbonate compositions and methods for increasing the flame-retardancy of polycarbonate compositions are disclosed. A glass fiber, alumina particles, and wollastonite particles are added to polycarbonate compositions. The addition of the glass fiber, alumina particles, and wollastonite particles to the polycarbonate composition produces a polycarbonate composition having a frame-retardance rating of UL 94 5V-A at 2.3 mm thickness or less. The inventive compositions retain good surface quality.
Claims18
A composition comprising:
- 50.0 wt. % to 65.0 wt. % polycarbonate;
- 5.0 wt. % to 15.0 wt. % styrene-acrylonitrile copolymer;
- 5.0 wt. % to 15.0 wt. % acrylonitrile-butadiene-styrene copolymer;
- 0.5 wt. % to 5.0 wt. % glass fiber;
- 0.5 wt. % to 5.0 wt. % alumina particles;
- and
- 0.5 wt. % to 5.0 wt. % wollastonite particles;
- wherein the wt. %, all instances, is based on total weight of the composition and wherein the composition exhibits a flame-retardance rating of UL 94 5V-A at 2.3 mm thickness or less.
5 more elements
A composition comprising:
- 40.0 wt. % to 70.0 wt. % polycarbonate;
- 5.0 wt. % to 30.0 wt. % vinyl copolymer;
- greater than 0 wt. % to 10.0 wt. % glass fiber;
- greater than 0 wt. % to 10.0 wt. % alumina particles;
- and
- greater than 0 wt. % to 10.0 wt. % wollastonite particles;
- wherein the total amount of glass fiber, alumina particles, and wollastonite particles is no greater than 25% of the composition by weight;
- wherein the composition exhibits a flame-retardance rating of UL 94 5V-A at 2.3 mm thickness or less;
- and wherein the wt. %, all instances, are based on total weight of the composition.
6 more elements
Dependencies are inferred from the claim text.