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EPDM roofing membrane with improved burn resistivity

  • US 5,468,550 A
  • Filed: 06/06/1994
  • Issued: 11/21/1995
  • Est. Priority Date: 06/06/1994
  • Status: Expired due to Term
First Claim
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1. A vulcanizable elastomeric roof sheet material for roofing having improved burn resistivity and prepared from a polymeric composition of matter, devoid of flame retardant rubber chemical additives comprising:

  • at least one polymer selected from the group consisting of polyolefins prepared from monomers containing at least 2 carbon atoms and mixtures thereof, said polymer having a crystallinity of up to about 2 percent by weight;

    about 20 to 125 parts by weight of one or more non-black mineral fillers per 100 parts of said polymer;

    about 50 to 110 parts by weight of one or more black fillers per 100 parts of said polymer; and

    from about 50 to 70 parts by weight of a processing material, per 100 parts of said polymer said composition of matter being devoid of flame retardant rubber chemical additives, heavy metals and halogen-containing polymers.

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