# US 12,600,117 B2 · Hybrid roofing membrane and methods of making same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,600,117 B2 - Document ID: US12600117B2 - Status: Granted - Kind: B2 - Application number: 18/595,924 - Filed: 2024-03-05 - Published: 2024-06-20 - Granted: 2026-04-14 - Earliest claimed: 2021-04-01 - Assignees: Johns Manville - Applicants: Johns Manville - Inventors: Diego Pedrazzoli; Lichih R Peng; Lance Wang; Jawed Asrar - Web page: https://patentgrep.com/patent/US12600117B2 ## CPC - B32B 27/08: of synthetic resin - B32B 27/302: {comprising aromatic vinyl (co)polymers, e.g. styrenic (co)polymers} - B32B 5/028: {Net structure, e.g. spaced apart filaments bonded at the crossing points} - B32B 7/022: Mechanical properties - B32B 27/12: next to a fibrous or filamentary layer - B32B 27/18: characterised by the use of special additives - B32B 27/304: {comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF} - B32B 27/32: comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)} - B32B 37/14: characterised by the properties of the layers - B32B 37/153: {at least one layer is extruded and immediately laminated while in semi-molten state} - C08L 23/00: Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers - C08L 27/06: Homopolymers or copolymers of vinyl chloride - E04D 5/10: by making use of compounded or laminated materials, e.g. metal foils or plastic films coated with bitumen - B32B 37/20: involving the assembly of continuous webs only - B32B 2037/0092: {in which absence of adhesives is explicitly presented as an advantage} - B32B 2307/732: Dimensional properties - B32B 2419/06: Roofs, roof membranes - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) - E04D: ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS (coverings of outer walls by plaster or other porous material E04F13/00) ## 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. ## Claims ### Claim 1 A roofing membrane, comprising: a first layer comprising a first polymer material; a second layer comprising a second polymer material, the second polymer material being different than the first polymer material; a reinforcing scrim disposed between the first layer and the second layer; and at least one compatibilizing film disposed between the first layer and the second 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; wherein at least one of the first polymer material and the second polymer material is compatibilized via the at least one compatibilizing film so that the first polymer material is chemically compatible with the second polymer material and so that the roofing membrane comprises between 0.5-15% of the at least one polymer; and wherein the at least one compatibilizing film is attached without the use of an adhesive. ### Claim 2 (depends on 1) The roofing membrane of claim 1, wherein the reinforcing scrim is disposed between a first compatibilizing film and a second compatibilizing film, the first compatibilizing film being positioned adjacent to the first layer and the second compatibilizing film being positioned adjacent to the second layer. ### Claim 3 (depends on 1) The roofing membrane of claim 1, wherein the first polymer material is thermoplastic polyolefin (TPO). ### Claim 4 (depends on 1) The roofing membrane of claim 1, wherein the second polymer material is polyvinyl chloride (PVC). ### Claim 5 (depends on 4) The roofing membrane of claim 4, wherein the first polymer material is thermoplastic polyolefin (TPO), and wherein a ply adhesion of the first layer and the second layer is at least two times greater than a reference roofing membrane that is devoid of the compatibilizing film. ### Claim 6 (depends on 1) The roofing membrane of claim 1, wherein the first layer has a first thickness and the second layer has a second thickness, wherein the second thickness is at most equal to the first thickness. ### Claim 7 (depends on 1) The roofing membrane of claim 1, wherein a compatibilizing agent is added to at least one of the first layer and the second layer. ### Claim 8 (depends on 1) The roofing membrane of claim 1, wherein the compatibilizing film thickness is from 0.5 mil to 5 mil. ### Claim 9 A roofing system, comprising: at least one support member, the at least one support member defining a roof surface; an insulation layer positioned atop the at least one support member on the roof surface; and a roofing membrane positioned atop the insulation layer and coupled with the roof surface, the roofing membrane comprising: a first layer comprising a first polymer material; a second layer comprising a second polymer material, the second polymer material being different than the first polymer material; a reinforcing scrim disposed between the first layer and the second layer; and a compatibilizing film disposed between the first layer and the second layer, wherein the compatibilizing film compatibilizes the first layer and/or the second layer so that the first layer and the second layer are chemically compatible, the compatibilizing film comprising 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), and combinations thereof; wherein the roofing membrane comprises between 0.5-15% of the at least one polymer; and wherein the compatibilizing film is attached without the use of an adhesive. ### Claim 10 (depends on 9) The roofing system of claim 9, wherein the reinforcing scrim is disposed between a first compatibilizing film and a second compatibilizing film, the first compatibilizing film being positioned adjacent to the first layer and the second compatibilizing film being positioned adjacent to the second layer. ### Claim 11 (depends on 9) The roofing system of claim 9, wherein the first polymer material is thermoplastic polyolefin (TPO). ### Claim 12 (depends on 9) The roofing system of claim 9, wherein the second polymer material is polyvinyl chloride (PVC). ### Claim 13 (depends on 9) The roofing system of claim 9, wherein the at least one support member comprises a metal deck, a wood deck, a concrete deck, or a combination thereof. ### Claim 14 (depends on 9) The roofing system of claim 9, wherein the insulation layer comprises foam insulation boards, cover boards, or a combination thereof. ### Claim 15 A method of making a roofing membrane, the method comprising: extruding a thermoplastic polyolefin (TPO) material to form a first layer of the roofing membrane; extruding a polyvinyl chloride (PVC) material atop the TPO material to form a second layer of the roofing membrane; positioning a reinforcing scrim between the first layer and the second layer; compatibilizing at least one of the TPO material and the PVC material by positioning at least one compatibilizing film between the TPO material and the PVC material so that the TPO material is chemically compatible with the PVC material; and bonding the TPO material to the PVC material without the use of an adhesive to form the roofing membrane; wherein the compatibilizing film comprises at least one polymer chosen from styrene-ethylene/butylene-styrene (SEBS), polypropylene grafted maleic anhydride (PPgMA), polyethylene grafted maleic anhydride (PEgMA), Elvaloy® ketone ethylene ester (KEE), chlorinated polyethylene (CPE), styrene-butyldiene-styrene (SBS), and combinations thereof; wherein the roofing membrane comprises between 0.5-15% of the at least one polymer; and wherein the at least one compatibilizing film is attached without the use of an adhesive. ### Claim 16 (depends on 15) The method of claim 15, wherein the reinforcing scrim is positioned between a first compatibilizing film and a second compatibilizing film, the first compatibilizing film adjacent to the TPO material and the second compatibilizing film adjacent to the PVC material.