Peel and stick roofing membranes with cured pressure-sensitive adhesives

Patent metadata

Field	Value
Publication number	US-10132082-B2
Application number	US-201415021787-A
Country	US
Kind code	B2
Filing date	Sep 18, 2014
Priority date	Sep 18, 2013
Publication date	Nov 20, 2018
Grant date	Nov 20, 2018

Abstract

A membrane composite comprising a polymeric membrane panel, an adhesive layer, and a release member, where the adhesive layer is a pressure-sensitive adhesive that is at least partially cured, and where the adhesive layer has a thickness of at least 102 μm.

First claim

What is claimed is:

1. A process for forming a roofing membrane composite, the process comprising:
(a) heating a melt-extrudable, UV-curable pressure-sensitive adhesive to allow the adhesive to flow, where the adhesive consists of a polyacrylate elastomer and, optionally, one or more of photoinitiators, solvents, plasticizers, and resins selected from the group consisting of natural resins and hydrocarbon resins;
(b) applying the adhesive to a planar surface of a thermoplastic or cured rubber roofing membrane panel for providing a weatherproof polymeric barrier to a building structure, to thereby form a coating layer of adhesive having a thickness of at least 152 μm, where the roofing membrane panel has a thickness of from about 500 μm to about 3 mm;
(c) subjecting the coating layer of the adhesive to UV radiation to thereby effect crosslinking of the adhesive to form a cross-linked infinite polymer network;
(d) applying a release member to the adhesive coating layer to form a roofing member composite; and
(e) winding the composite.

2. The process of claim 1 , where said step of heating heats the adhesive to a temperature of from about 120 to about 160° C.

3. The process of claim 1 , where said step of subjecting the coating to UV radiation includes subjecting the adhesive to a UV dosage of from about 50 to about 230 millijoules/cm 2 .

4. The process of claim 1 , where said step of subjecting the coating to UV radiation includes subjecting the adhesive to at least 150 milliWatts/cm 2 of UV energy.

5. The process of claim 1 , where said step of subjecting the coating to UV radiation includes subjecting the adhesive to at least 200 milliWatts/cm 2 of UV energy.

6. The process of claim 1 , where the adhesive includes one or more units deriving from butyl acrylate or 2-ethylhexyl acrylate.

7. The process of claim 1 , where the adhesive has a Tg of less than 0° C.

8. The process of claim 1 , where the roofing membrane panel has a width of from about 1 to about 20 meters.

Assignees

• Firestone Building Prod Co Llc

Inventors

• Tang Jiansheng
• Hubbard Michael J

Classifications

• B32B2419/06

  Roofs, roof membranes · CPC title

• B32B27/308

  comprising acrylic (co)polymers · CPC title

• C09J133/00

  Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers · CPC title

• B32B2255/10

  on synthetic resin layer or on natural or synthetic rubber layer · CPC title

• B32B7/12

  using interposed adhesives or interposed materials with bonding properties · CPC title