Johns Manville

Lichih R Peng

Jordan Kortmeyer

Jawed Asrar

Lance Wang

Zebonie Sukle

Thomas Justin Stock

Diego Pedrazzoli

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.

Hybrid roofing membrane and methods of making same

Provided is a polymer blend composition comprising linear low density polyethylene, a propylene polymer generally having rubber dispersed therein, and a combination of a propylene copolymer and an ethylene copolymer. In one embodiment, there is provided a polymer blend composition comprising 15 to 75 weight percent of a propylene polymer having from 10-60% crystallinity, 30-50 weight percent of a linear low density polyethylene, and a combination of the propylene copolymer and the ethylene copolymer comprising the remainder of the composition.

Roofing compositions comprising linear low density polyethylene

Provided is a polymer blend composition comprising high density polyethylene, a propylene polymer having rubber dispersed therein, and a propylene/ethylene copolymer. In one embodiment, there is provided a polymer blend composition comprising from 20 to 55 weight percent of the high density polyethylene, from 20 to 55 weight percent of a propylene polymer having from 10-60% crystallinity, and a propylene/ethylene copolymer comprising the remainder of the composition.

Roofing compositions comprising high density polyethylene

Provided is a polymer blend composition comprising high density polyethylene, a propylene polymer having rubber dispersed therein, and a propylene/ethylene copolymer. In one embodiment, there is provided a polymer blend composition comprising from 25 to 55 weight percent of the high density polyethylene, from 25 to 55 weight percent of a propylene polymer having from 10-60% crystallinity, and a propylene/ethylene copolymer comprising the remainder of the composition.

Provided is a polymer blend composition comprising linear low density polyethylene, a propylene polymer generally having rubber dispersed therein, and a combination of a propylene copolymer and an ethylene copolymer. In one embodiment, there is provided a polymer blend composition comprising 20 to 65 weight percent of a propylene polymer having from 10-60% crystallinity, 30-60 weight percent of a linear low density polyethylene, and a combination of the propylene copolymer and the ethylene copolymer comprising the remainder of the composition.

According to one embodiment, a roofing membrane laminate includes a first layer of an uncured ethylene propylene diene monomer rubber (EPDM) material and a second layer of a thermoplastic polyolefin (TPO) material coupled with the EPDM material. The EPDM material has a thickness of between about 50 mils and 70 mils and the TPO material has a thickness of between about 15 mils and 35 mils. The EPDM material and TPO material are coupled via crosslinking of the TPO and EPDM material at an interface thereof, whereby at least a top portion of the EPDM material is cured via the application of heat after the EPDM material and TPO material are placed into contact so as to effect crosslinking of the materials.

White and black ply laminate

Embodiments of the invention provide improved roofing membranes and methods and systems involving the same. According to one embodiment, a roofing membrane laminate is provided. The roofing membrane laminate includes a first membrane layer that includes a thermoplastic polyolefin material and a second membrane layer positioned atop the first membrane layer and bonded thereto. The second membrane layer includes a thermoplastic polyolefin material and an acrylate additive blended with the thermoplastic polyolefin material. The acrylate additive is blended with the thermoplastic polyolefin material while both materials are resins and is added so as to comprise 10% by weight or less of the blended resins. The acrylate additive includes an ethylene backbone chain and an acrylate bonded with the ethylene backbone chain.

Roofing membranes and methods for constructing

According to one embodiment, a method of making a roofing membrane is provided. According to the method, an ethylene propylene diene monomer rubber (EPDM) material sheet is provided and a thermoplastic polyolefin (TPO) material sheet is extruded onto the EPDM material sheet. The EPDM material sheet and TPO material sheet are then pressed together via one or more rollers. The EPDM material is uncured and has a thickness of between about 50 mils and 70 mils. The extruded TPO sheet has a temperature of at least 150 degrees Celsius and a thickness of between about 15 mils and 35 mils. The heat of the TPO material sheet causes a top portion of the EPDM material sheet to cure such that crosslinking of the TPO and EPDM material sheets occurs at an interface of the sheets to bond the sheets together.

Growing community of inventors

Littleton, CO, United States of America

Lichih R Peng