Invention Grant
US08933153B2 Impact-modified polycarbonate compositions for simplified production of components of low temperature toughness having high gloss and matt component sections 有权
冲击改性聚碳酸酯组合物,用于简化生产具有高光泽度和无光分量部分的低温韧性组分

Impact-modified polycarbonate compositions for simplified production of components of low temperature toughness having high gloss and matt component sections
Abstract:
The present invention relates to impact-modified polycarbonate molding compositions, the use thereof for producing shaped bodies and moldings, as well as shaped bodies and molding produced therefrom themselves. Compositions of the present invention comprise mixtures of graft polymers prepared in the emulsion polymerization process and in the bulk, solution and/or suspension polymerization process having a defined grafted particle size distribution. Compositions of the present invention, on the one hand are suitable for producing, over a wide processing window, (i.e. also at high processing temperatures), non-lacquered components having a high gloss surface, and on the other hand, are also capable of precise imaging of fine-grained or surface-etched mold surfaces. A result of this point is that components of the present invention are capable of having both high gloss and deep matte component sections that can be realized in a mold having different surface textures in a single injection molding step without further after-treatment of the surface. The molding compositions have a high heat distortion temperature and ductility at low temperatures and an excellent resistance to stress cracking under the influence of media—which is particularly important with respect to non-lacquered components.
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