Patent ID: 8648149

Claim:
Radically coupled polytetrafluoroethylene polymer compound comprising radiation-chemically modified polytetrafluoroethylene micropowder with a radiation dose greater than 50 kGy under the influence of oxygen, the radiation-chemically modified polytetrafluoroethylene micropowder including a surface, and at least one olefinically unsaturated polymer chemically radically coupled on the surface of the radiation-chemically modified polytetrafluoroethylene micropowder via a reactive conversion into melt, wherein the at least one olefinically unsaturated polymer includes olefinically unsaturated groups in at least one of main chain or side chain of the at least one olefinically unsaturated polymer and the at least one olefinically unsaturated polymer is styrene-butadiene-styrene block copolymer, acrylonitrile-butadiene- styrene copolymer, styrene butadiene rubber, nitrile butadiene rubber, and/or natural rubber.