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IMPACT-MODIFIED POLYCARBONATE COMPOSITIONS FOR THE PRODUCTION OF METALLISED MOULDINGS WITH HOMOGENEOUS SURFACE GLOSS

  • US 20100267889A1
  • Filed: 03/23/2010
  • Published: 10/21/2010
  • Est. Priority Date: 03/26/2009
  • Status: Active Grant
First Claim
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1. A composition comprisingA) 55 to 90 parts by weight (based on the sum of the parts by weight of components A, B and C) of aromatic polycarbonate and/or aromatic polyester carbonate with a relative solution viscosity, measured in methylene chloride, of 1.20 to 1.30,B) 10 to 45 parts by weight (based on the sum of the parts by weight of components A, B and C) of rubber-modified component comprisingB.1) at least one graft polymer, produced by emulsion polymerisation, by graft polymerisation ofB.1.1) 5 to 95 wt.%, based on the sum of B.1.1 and B.1.2, of at least one vinyl monomer onB.1.2) 95 to 5 wt. %, based on the sum of B.1.1 and B.1.2, of one or more particulate rubbers as backbones with glass transition temperatures of <



  • C.,B.2) optionally a rubber-free vinyl (co)polymer,B.3) optionally a graft polymer of at least one vinyl monomer on at least one rubber backbone with a glass transition temperature of <



    C., produced by a bulk, solution or bulk-suspension polymerisation process,wherein the graft polymers B.1 and B.3, in addition to graft particles, may optionally also comprise as a result of their production free (co)polymer of the vinyl monomers, that are not chemically bonded to the rubber particles and/or included in the graft particles in a form that is insoluble in organic solvents,C) 0 to 25 parts by weight (based on the sum of the parts by weight of components A, B and C) of polymer additives,wherein(i) the rubber content of the polycarbonate composition is 1 to 6 wt. %, and(ii) at least 40 wt. % of the graft particles in component B have a diameter (measured by ultracentrifuge) of up to 200 nm.

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