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US 12,385,253 B2Granted
Fabric-backed roofing membrane composite
AssigneeHolcim Technology Ltd
InventorsJiansheng Tang, Michael J. Hubbard, Joseph Kalwara, Carl E. Watkins, Jr., Brian Alexander, Todd D. Taykowski, Joseph R. Carr
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Abstract
A membrane composite comprising a membrane panel having opposed first and second planar surfaces and a fabric backing secured to a first planar surface through a UV-cured adhesive disposed on said planar surface of said membrane.
Claims9
A method for preparing a membrane composite, the method comprising:
- (i) providing an EPDM roofing membrane panel having opposed first and second planar surfaces;
- (ii) providing a UV-curable polyacrylate composition, wherein the UV-curable polyacrylate includes monomeric units defined by the formula:
- where each R1 is individually hydrogen or a hydrocarbyl group and each R2 is individually a hydrocarbyl group, where R2 is an alkyl group having at least 4 carbon atoms;
- (iii) providing a fabric;
- (iv) applying the UV-curable polyacrylate composition to the first planar surface of the EPDM membrane to thereby form a laminate that includes a layer of UV-curable polyacrylate and a layer of EPDM roofing membrane panel;
- (v) subjecting the layer of UV-curable polyacrylate to UV radiation to thereby form a cured laminate that includes a layer of cured polyacrylate and a layer of EPDM roofing membrane panel, where the layer of cured polyacrylate is a pressure-sensitive adhesive;
- and (vi) mating the layer of fabric to the layer of cured polyacrylate to thereby form the membrane composite.
4 more elements
Dependencies are inferred from the claim text.