US 11,951,716 B2 · Hybrid roofing membrane and methods of making same

Abstract

A roofing membrane includes a thermoplastic polyolefin (TPO) layer and a polyvinyl chloride (PVC) layer. The TPO layer forms a bottom layer of the roofing membrane, and the PVC layer is positioned atop the TPO layer so that the PVC layer forms a top layer of the roofing membrane. The TPO layer and the PVC layer are configured to be chemically compatible so that the TPO layer and the PVC layer are chemically bonded and function as a single roofing membrane. Compatibilizing includes at least one of (i) adding a compatibilizing agent to at least one of the TPO material and the PVC material prior to extrusion and (ii) positioning at least one compatibilizing film, prior to bonding, between the TPO material and the PVC material.

Claims8

Dependent claims

A roofing membrane, comprising:

a thermoplastic polyolefin (TPO) layer comprising TPO material;
a polyvinyl chloride (PVC) layer adjacent to the TPO layer, the PVC layer comprising PVC material;
a reinforcing scrim disposed between the TPO layer and the PVC layer;
and
at least one compatibilizing film disposed between the TPO layer and the PVC layer;
wherein the at least one compatibilizing film comprises at least one polymer chosen from styrene-ethylene/butylene-styrene (SEBS), polypropylene grafted maleic anhydride (PPgMA), polyethylene grafted maleic anhydride (PEgMA), ketone ethylene ester (KEE), chlorinated polyethylene (CPE), styrene-butyldiene-styrene (SBS), or combinations thereof;
and
wherein at least one of the TPO material and the PVC material is compatibilized via the at least one compatibilizing film so that the TPO material is chemically bonded to the PVC material.

5 more elements

Dependencies are inferred from the claim text.

Hybrid roofing membrane and methods of making same

Life of this patent

Hybrid roofing membrane and methods of making same

Life of this patent

Abstract

Claims8