Single ply reinforced roofing membrane

Abstract

A single ply reinforced roofing membrane having advantageous tensile and seam strength comprising a reinforcement scrim sandwiched between polyolefin cap and base layers, characterized in that at least one of said layers includes a functional polyolefin as additive therein.

What is claimed is:  
     
         1 . A single ply reinforced roofing membrane having advantageous tensile and seam strength comprising a reinforcement scrim sandwiched between polyolefin cap and base layers, characterized in that at least one of said layers includes a functional polyolefin as additive therein.  
     
     
         2 . A single ply reinforced roofing membrane according to  claim 1  wherein about 0.5-20% by wt. of said functional polyolefin is present in one of said layers.  
     
     
         3 . A single ply reinforced roofing membrane according to  claim 2  wherein said amount is about 1-10%.  
     
     
         4 . A membrane according to  claim 3  wherein said amount is 1-5%.  
     
     
         5 . A single ply reinforced roofing membrane according to  claim 1  wherein said functional polyolefin includes a functional group selected from carboxyl, epoxy, anhydride, amine, ester, (meth)acrylate and succinimide groups.  
     
     
         6 . A single ply reinforced roofing membrane according to  claim 1  wherein said cap and base polyolefin layers are polymers selected from polyethylene, polypropylene, terpolymers of ethylene, propylene and diene monomers, ethylene-propylene copolymers, ethylene-butene copolymers, ethylene-hexene copolymers, ethylene-octene copolymers, propylene-C 4-8  alpha-olefin copolymers and metallocene polyolefin.  
     
     
         7 . A single ply reinforced roofing membrane according to  claim 2  wherein said additive is selected from maleic anhydride-polyolefin and epoxy polyethylene, and (meth)acrylate terpolymers thereof.