Patent Number: 7,101,628

Title: Thermoplastic vulcanizate and membrane for covering a roof made therefrom

Abstract: Broadly, the present invention provides a thermoplastic vulcanizate which can be readily processed into sheeting material for covering a roof that is both flexible and highly elastic. Where other thermoplastic elastomeric compositions have either been too stiff to act as roofing membranes or not processable due to their melt flow characteristics, the present thermoplastic vulcanizate employs a polypropylene random copolymer resin and a polyethylene random copolymer resin having about 10 to about 35 percent by weight .alpha.-olefin co-monomer units; together with a compatibilizing rubber and a peroxide-based cross-linking agent, to provide an effective membrane for covering roofs.

Inventors: Peng; Lichih Richard (Fishers, IN)

Assignee: BFS Diversified Products, LLC

International Classification: B32B 27/32 (20060101)

Expiration Date: 9/05/02018