Patent ID: 6924015
Filing Date: 2005-08-02
Classification: D06N,E04D,Y10T

Abstract:
1. A roofing membrane comprising: an upper layer of modified bituminous material modified with a modifier selected from the group consisting of: Atactic PolyPropylene (APP), Amorphous Poly Alpha Olefin (APOA), Thermoplastic PolyOlefin (TPO), Styrene-Butadiene-Styrene (SBS), Styrene-Ethylene-Butadiene-Styrene (SEBS), and synthetic rubber, said upper layer having a longitudinally extending side lap, a lower layer of self-adhesive bituminous material comprised of asphalt, filler, and tackifier, the lower layer having an exposed lower surface is adhesive throughout substantially said lower surface, the material of said lower layer being a material that differs from the material comprising the upper layer, a reinforcing layer disposed between the lower layer and the upper layer, a coating of factory applied adhesive being present on said side lap, said coating comprised of an adhesive selected from the group consisting of: tackifying resin, pressure sensitive adhesive, and Poly Vinyl Butyral (PVB), a release film covering said coating of factory applied adhesive, and a release liner covering said lower layer, whereby adjacent and successive overlapping membranes may be connected by the factory applied adhesive to form a seal and a permanent bond upon the application of pressure, such as by a roller.