Bayer Corporation

Venkatarayaloo Janarthanan

Karl-Erwin Piejko

Lora Lee Spangler

Sara D Graham

Roland P Brassard

A thermoplastic molding composition comprising, (A) an aromatic polycarbonate; (B) a single rubber-free copolymer, e.g., of styrene and acrylonitrile; (C) a first graft polymer; (D) a second graft polymer; and (E) a wax, is described. The single rubber-free copolymer (B), and first and second graft polymers (C) and (D) are prepared from a specific selection of graft phases and graft bases. The graft base of the first graft polymer (C) comprises a crosslinked, particulate elastomer having an average particle diameter of 0.05 to 0.5 microns. The second graft polymer (D) has an average particle diameter of 0.6 to 20 microns. The thermoplastic compositions of the present invention are well suited for the preparation of molded articles that may be metalized over at least a portion of their surface by means of an electroless plating process. Such electroless plated articles are characterized as having improved heat resistance and adhesion of the metal plating.

Thermoplastic polycarbonate molding composition containing a rubber free copolymer and a combination of graft polymers

A thermoplastic molding composition suitable for preparing molded articles having improved properties, most notably high ductility and impact strength at low temperature, is disclosed. The composition contains a resinous blend of aromatic polycarbonate and a mixture of at least two grafted rubbers. The mixture of grafted rubbers contains a &ldquo;small-mode&rdquo; component having a weight average particle size of less than 0.3 microns and a &ldquo;large-mode&rdquo; component having a weight average particle size of 0.3 microns or larger. The inventive composition is characterized in the absence of flaky filler having an aspect ratio is at least 1.7 and particle size of 1-100 microns therefrom.

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Gujarat, India

Venkatarayaloo Janarthanan