Fully-adhered roof system adhered and seamed with a common adhesive

Patent metadata

Field	Value
Publication number	US-12006692-B2
Application number	US-202318192567-A
Country	US
Kind code	B2
Filing date	Mar 29, 2023
Priority date	Mar 25, 2016
Publication date	Jun 11, 2024
Grant date	Jun 11, 2024

Abstract

A roof system comprising a roof substrate, a first membrane including first and second opposed planar surfaces, and a second membrane including opposed first and second planar surfaces, where said second membrane is adhered to said roof substrate through an adhesive disposed on said roof-substrate contacting portion of the first membrane, and where said second membrane is adhered to said first membrane through said adhesive disposed on a lap portion of said second membrane.

First claim

What is claimed is:

1. A roofing membrane composite comprising:
(i) a roofing membrane panel having opposed first and second planar surfaces and first and second lateral edges, said first planar surface including a roof-substrate contacting portion and a lap portion adjacent to one of said first and second lateral edges;
(ii) a layer of UV-cured pressure-sensitive adhesive disposed on said roof-substrate contacting portion and said lap portion, where the layer of UV-cured pressure-sensitive adhesive is disposed on the entirety of the roof-substrate contacting portion from the first lateral edge to the second lateral edge, the UV-cured pressure-sensitive adhesive including a UV-cured polyacrylate having a gel content, as determined by THF extraction after boiling in THF after four hours, of at least 50% by weight, and where the polyacrylate, prior to UV curing, has a Tg of less than −20° C. and a number average molecular weight of from about 100 to about 350 kg/mol, and where the degree of cure of said UV-cured pressure-sensitive adhesive varies by no more than 10% between said roof-substrate contacting portion and said lap portion; and
(iii) a release member removable affixed to said UV-cured adhesive in both said roof-substrate contacting portion and said lap portion, where said UV-cured adhesive disposed on said roof-substrate portion and said lap portion is substantially homogeneous.

2. The membrane of claim 1 , where said release member includes a perforation that allows said release member to be divided between said roof-substrate contacting portion and said lap portion.

3. The membrane of claim 1 , where the degree of cure of said UV-cured adhesive varies by no more than 1% between said roof-substrate contacting portion and said lap portion.

4. The membrane of claim 1 , where the UV-cured adhesive is a UV-cured polyacrylate, and where said UV-cured polyacrylate, prior to being cured, includes one or more 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.

5. The method of claim 1 , where the layer of UV-cured pressure-sensitive adhesive includes a UV-cured polyacrylate having a gel content, as determined by THF extraction after boiling in THF after four hours, of at least 60% by weight.

6. The method of claim 1 , where the layer of UV-cured pressure-sensitive adhesive includes a UV-cured polyacrylate having a gel content, as determined by THF extraction after boiling in THF after four hours, of from about 50% to about 90%.

7. The method of claim 1 , where the layer of UV-cured pressure-sensitive adhesive includes a UV-cured polyacrylate having a gel content, as determined by THF extraction after boiling in THF after four hours, of from about 60% to about 80%.

8. The method of claim 1 , where the layer of UV-cured pressure-sensitive adhesive is characterized by a peel strength when adhered to the adjacent membrane, as determined by ASTM D-1876-08, of at least 3.6 lbf/in.

9. The method of claim 1 , where the layer of UV-cured pressure-sensitive adhesive is characterized by a peel strength when adhered to the adjacent membrane, as determined by ASTM D-1876-08, of at least 8.0 lbf/in.

10. The method of claim 1 , where the layer of UV-cured pressure-sensitive adhesive is characterized by a peel strength when adhered to the adjacent membrane, as determined by ASTM D-1876-08, of at least 15 lbf/in.

11. The method of claim 1 , where the roofing membrane panel is a thermoplastic membrane panel.

12. The method of claim 1 , where the roofing membrane panel is an EPDM membrane panel.

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

• C09J5/00

  Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers · CPC title

• C09J2203/346

  for building applications e.g. wrap foil · CPC title

• B32B25/042

  of natural rubber or synthetic rubber · CPC title

• B32B5/022

  Non-woven fabric · CPC title

• B32B27/36

  comprising polyesters · CPC title