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ELECTRICAL TRACKING RESISTANCE COMPOSITIONS, METHODS & ARTICLES OF MANUFACTURE

  • US 20120248384A1
  • Filed: 08/11/2011
  • Published: 10/04/2012
  • Est. Priority Date: 03/31/2011
  • Status: Active Grant
First Claim
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1. A composition comprising:

  • a polycarbonate that is not a polysiloxane block co-polycarbonate;

    a polysiloxane block co-polycarbonate;

    a transition metal oxide;

    a brominated organic flame retardant or a halogen organic flame retardant compound;

    optionally 0 to 3 wt % of a fluorinated polyolefin;

    optionally an additive that imparts a desired performance property; and

    optionally a carbon black containing material, wherein the composition has a notched izod impact at −

    30°

    C. of at least 35 kJ/m2 at a thickness of 3.0 mm according to ISO-180 standard with a 5.5J hammer and wherein the composition has a p(FTP) V0 flammability rating of at least 0.85 at 0.8 mm, 1.0 mm, and 1.5 mm according to the method of UL 94, and further wherein the composition does not show tracking through at least 50 drops of a 0.1% aqueous ammonium chloride solution at 250V according to ASTM D-3638.

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