# US 2014/0150960 A1 · Roofing membranes and methods for constructing > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0150960 A1 - Document ID: US20140150960A1 - Status: Published application - Kind: A1 - Application number: 13/706,065 - Filed: 2012-12-05 - Published: 2014-06-05 - Earliest claimed: 2012-12-05 - Assignees: Johns Manville - Applicants: Johns Manville - Inventors: Lichih R. Peng - Web page: https://patentgrep.com/patent/US20140150960A1 ## CPC - E04D 5/10: by making use of compounded or laminated materials, e.g. metal foils or plastic films coated with bitumen - B32B 27/00: Layered products comprising {a layer of} synthetic resin {(fibrous or filamentary layer made of a synthetic resin B32B5/02; particulate layer made of a synthetic resin B32B5/16; foamed layer made of a synthetic resin B32B5/18)} - B32B 27/32: comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)} - B32B 2419/06: Roofs, roof membranes - E04D 5/06: by making use of plastics - Y10T 428/31913: Monoolefin polymer - E04D: ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS (coverings of outer walls by plaster or other porous material E04F13/00) - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract 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. ## Claims ### Claim 1 A roofing membrane laminate having improved heat reflective properties, the roofing membrane laminate comprising: a first membrane layer, the first membrane layer comprising thermoplastic polyolefin; and a second membrane layer positioned atop the first membrane layer and bonded thereto, wherein the second membrane layer comprises: thermoplastic polyolefin; and a copolymer additive blended with the thermoplastic polyolefin, the copolymer additive being blended with the thermoplastic polyolefin while both materials are a resin so as to comprise 10% by weight or less of the blended resin, wherein the copolymer additive includes: an ethylene backbone chain bonded with the thermoplastic polyolefin; and an acrylate bonded with the ethylene backbone chain. ### Claim 2 (depends on 1) The roofing membrane laminate of claim 1, wherein the acrylate is included or incorporated within the ethylene backbone chain. ### Claim 3 (depends on 2) The roofing membrane laminate of claim 2, wherein the acrylate is further bonded or grafted with the ethylene backbone chain as a pendant group. ### Claim 4 (depends on 1) The roofing membrane laminate of claim 1, wherein the acrylate is bonded or grafted with the ethylene backbone chain as a pendant group. ### Claim 5 (depends on 1) The roofing membrane laminate of claim 1, wherein the copolymer additive is blended with the thermoplastic polyolefin so as to comprise 5% by weight or less of the blended resin. ### Claim 6 (depends on 1) The roofing membrane laminate of claim 1, wherein the copolymer additive is blended with the thermoplastic polyolefin so as to comprise 3% by weight or less of the blended resin. ### Claim 7 (depends on 1) The roofing membrane laminate of claim 1, wherein the copolymer additive further comprises maleic anhydride bonded with the ethylene backbone chain. ### Claim 8 (depends on 7) The roofing membrane laminate of claim 7, wherein a fire retardant is bonded with the maleic anhydride pendant group. ### Claim 9 (depends on 1) The roofing membrane laminate of claim 1, further comprising a third membrane layer, wherein the third membrane layer comprises thermoplastic polyolefin, and wherein the first and second membrane layers are positioned atop and bonded with the third membrane layer. ### Claim 10 A roofing membrane comprising: a thermoplastic polyolefin material; and an acrylate additive blended with the thermoplastic polyolefin material, the acrylate additive being blended with the thermoplastic polyolefin material while both materials are in a resin form such that the acrylate additive comprises 10% by weight or less of the blended resins. ### Claim 11 (depends on 10) The roofing membrane of claim 10, wherein the thermoplastic polyolefin material comprises polyethylene or polypropylene or a combination thereof. ### Claim 12 (depends on 10) The roofing membrane of claim 10, wherein the acrylate additive comprises: an ethylene chain; and an acrylate bonded with the ethylene chain. ### Claim 13 (depends on 10) The roofing membrane of claim 10, wherein the acrylate additive is blended with the thermoplastic polyolefin material so as to comprise 5% by weight or less of the blended resins. ### Claim 14 (depends on 12) The roofing membrane of claim 12, wherein the acrylate additive further comprises a maleic anhydride bonded with the ethylene chain. ### Claim 15 (depends on 14) The roofing membrane of claim 14, wherein the maleic anhydride is bonded with the ethylene chain so as to comprise between about 2-5% by weight of the compound chain. ### Claim 16 (depends on 14) The roofing membrane of claim 14, wherein a fire retardant is bonded with the maleic anhydride. ### Claim 17 (depends on 16) The roofing membrane of claim 16, wherein the fire retardant comprises magnesium hydroxide. ### Claim 18 (depends on 10) The roofing membrane of claim 10, wherein the acrylate additive is disposed toward a surface of the roofing membrane so as to form a polyacrylate coating, layer, or finish on the surface of the roofing membrane. ### Claim 19 A method of making a roofing membrane comprising: providing a thermoplastic polyolefin material; blending an acrylate additive with the thermoplastic polyolefin material so that the acrylate additive comprises 10% by weight or less of the blended material, the acrylate additive comprising: an ethylene chain; and an acrylate group bonded with the ethylene chain; and forming the blended material into a substantially flat sheet. ### Claim 20 (depends on 19) The method of claim 19, wherein the method further comprises blending the acrylate additive with the thermoplastic polyolefin material so that the acrylate additive comprise 5% by weight or less of the blended material. ### Claim 21 (depends on 19) The method of claim 19, wherein the acrylate additive further comprises a maleic anhydride bonded with the ethylene chain, and wherein the method further comprises: blending a fire retardant with the thermoplastic material, wherein the fire retardant bonds with the maleic anhydride. ### Claim 22 (depends on 19) The method of claim 19, wherein forming the blended material into a substantially flat sheet comprises extruding the blended material through a die, wherein the acrylate additive migrates toward a surface of the blended material so that the roofing membrane comprises a polyacrylate coating, layer, or finish on the surface. ### Claim 23 (depends on 19) The method of claim 19, wherein the method further comprises coupling the roofing membrane with a roof surface. ### Claim 24 (depends on 23) The method of claim 23, wherein the method further comprises overlaying a portion of the roofing membrane with an additional roofing membrane and heat welding the two roofing membranes together.