Fabric-backed roofing membrane composite

Patent metadata

Field	Value
Publication number	US-12385253-B2
Application number	US-202318491904-A
Country	US
Kind code	B2
Filing date	Oct 23, 2023
Priority date	Mar 25, 2016
Publication date	Aug 12, 2025
Grant date	Aug 12, 2025

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.

First claim

What is claimed is:

1. 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 R 1 is individually hydrogen or a hydrocarbyl group and each R 2 is individually a hydrocarbyl group, where R 2 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.

2. The method of claim 1 , where the UV-curable polyacrylate consists essentially of monomeric units defined by the formula:

where each R 1 is individually hydrogen or a hydrocarbyl group and each R 2 is individually a hydrocarbyl group, where R 2 is an alkyl group having at least 4 carbon atoms.

3. The method of claim 1 , where the UV-curable polyacrylate consists of monomeric units defined by the formula:

where each R 1 is individually hydrogen or a hydrocarbyl group and each R 2 is individually a hydrocarbyl group, where R 2 is an alkyl group having at least 4 carbon atoms.

4. The method of claim 1 , where the fabric is a polyester fleece.

5. The method of claim 4 , where the EPDM membrane panel meets the specifications of ASTM D-4637.

6. The method of claim 5 , where the polyester fleece has a thickness of from about 0.5 to about 4.0 mm and a basis weight of at least 70 g/m 2 .

7. The method of claim 1 , where said step of applying includes applying the UV-curable polyacrylate composition across the entire width of the first planar surface of the membrane panel.

8. The method of claim 2 , where R 1 is hydrogen and R 2 is selected from the group consisting of butyl, 2-ethylhexyl, and mixtures thereof.

9. The method of claim 8 , where the polyacrylate is a copolymer including monomeric units of the formula where R 2 is butyl and monomeric units of the formula where R 2 is 2-ethylhexyl.

Assignees

• Holcim Technology Ltd

Inventors

• Tang Jiansheng
• Hubbard Michael J
• Kalwara Joseph
• Watkins Jr Carl E
• Alexander Brian
• Taykowski Todd D
• Carr Joseph R

Classifications

• E04D5/08

  by making use of other materials · CPC title

• E04D5/06 Primary

  by making use of plastics · CPC title

• B32B2419/06

  Roofs, roof membranes · CPC title

• B32B2262/101

  Glass fibres · CPC title

• B32B2262/0284

  Polyethylene terephthalate [PET] or polybutylene terephthalate [PBT] · CPC title