Peel and stick roofing membranes with cured pressure-sensitive adhesives

• US 10,370,854 B2
• Filed: 01/05/2017
• Issued: 08/06/2019
• Est. Priority Date: 09/18/2013
• Status: Active Grant

• Current Assignee: Holcim Technology, Ltd. (Holcim Limited)
• Original Assignee: Firestone Building Products Company LLC (Bridgestone Corporation)
• Inventors: Tang, Jiansheng, Hubbard, Michael J
• Primary Examiner(s): Nordmeyer, Patricia L.
• Application Number:
  US15/398,868
• Publication Number:
  US 20170114543A1
• Time in Patent Office: 943 Days
• CPC Class Codes: B32B 2255/10 on synthetic resin layer or on natural or synthetic rubber layer
• CPC Class Codes: B32B 2255/26 Polymeric coating
• CPC Class Codes: B32B 2307/748 Releasability
• CPC Class Codes: B32B 2419/06 Roofs, roof membranes
• CPC Class Codes: B32B 25/04 comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material next to a layer of a particular substance B32B9/043; next to a bituminous or tarry layer B32B11/044; next to a water setting substance layer B32B13/042; next to a metal layer B32B15/06; next to a glass layer B32B17/063; next to a layer formed of natural mineral fibres or particles B32B19/043; next to a wood layer B32B21/045; next to a cellulosic plastic layer B32B23/046
• CPC Class Codes: 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
• CPC Class Codes: B32B 27/308 comprising acrylic (co)polymers
• CPC Class Codes: B32B 7/06 permitting easy separation
• CPC Class Codes: B32B 7/12 using interposed adhesives or interposed materials with bonding properties
• CPC Class Codes: C09J 133/00 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 Class Codes: C09J 2301/302 the adhesive being pressure-sensitive, i.e. tacky at temperatures inferior to 30°C
• CPC Class Codes: C09J 2301/304 the adhesive being heat-activatable, i.e. not tacky at temperatures inferior to 30°C
• CPC Class Codes: C09J 2301/40 characterized by the presence of essential components
• CPC Class Codes: C09J 2423/16 Presence of ethen-propene or ethene-propene-diene copolymers
• CPC Class Codes: C09J 2423/166 in the substrate
• CPC Class Codes: C09J 2433/00 Presence of (meth)acrylic polymer
• CPC Class Codes: C09J 7/22 Plastics; Metallised plastics
• CPC Class Codes: C09J 7/243 Ethylene or propylene polymers
• CPC Class Codes: C09J 7/38 Pressure-sensitive adhesives [PSA]
• CPC Class Codes: C09J 7/385 Acrylic polymers
• CPC Class Codes: E04D 5/06 : by making use of plastics
• CPC Class Codes: E04D 5/08 : by making use of other materials
• CPC Class Codes: E04D 5/10 : by making use of compounded or laminated materials, e.g. metal foils or plastic films coated with bitumen
• CPC Class Codes: E04D 5/148 : fastening by gluing

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.

Claims

1. A roofing membrane composite comprising:

a. a polymeric membrane panel for providing a weatherproof polymeric barrier to a building structure;

b. an adhesive layer; and

c. a release member, where the adhesive layer is an ultraviolet (UV) cured pressure-sensitive adhesive that is at least partially cured and where the at least partially cured pressure-sensitive adhesive is characterized by a cross-linked infinite polymer network, and where the adhesive layer has a thickness of at least 102 μ

m.

2. The membrane composite of claim 1, where the adhesive layer is in contact with substantially all of one planar surface of the membrane panel.

3. The membrane composite of claim 1, where the adhesive layer includes a UV-cured poly(acrylate) resin.

4. The membrane composite of claim 1, where the polymeric membrane is a thermoplastic membrane.

5. The membrane composite of claim 1, where the polymeric membrane is a cured rubber membrane.

6. The membrane composite of claim 1, where the membrane composite is characterized by a peel strength, when adhered to a stainless steel panel and tested according to PSTC 101, of at least 3.0 psi.

7. The membrane composite of claim 1, where the membrane composite is characterized by a dead load shear, when adhered to a stainless steel panel and tested according to PSTC 107, of at least 0.5 hour.

8. The membrane composite of claim 1, where the adhesive layer has a thickness of from about 102 to about 381 μ

m.

9. The membrane composite of claim 1, where the adhesive layer has a thickness of from about 127 to about 305 μ

m.

10. The membrane composite of claim 1, where the adhesive layer has a thickness of at least 152 μ

m.

11. The membrane composite of claim 1, where the adhesive layer is formed from a UV-curable composition that comprises a polyacrylate elastomer.

12. The membrane composite of claim 11, where the polyacrylate elastomer includes polymerized units that serve as photoinitiators.

13. The membrane composite of claim 11, where the polyacrylate elastomer is characterized by a number average molecular weight of from about 100 to about 350 kg/mol.

14. The membrane composite of claim 11, where the polyacrylate elastomer is characterized by a Brookfield viscosity at 150°

C. of from about 20,000 to about 70,000 cps.

15. The membrane composite of claim 11, where the UV-curable composition further comprises one or more of photoinitiators, solvents, plasticizers, and resins.

16. The membrane composite of claim 11, where the polyacrylate elastomer has a Tg of less than 0°

C.

17. The membrane composite of claim 1, where the roofing membrane panel has a thickness of from about 500 μ

m to about 3 mm.

18. The membrane composite of claim 1, where the polymeric membrane is ethylene-propylene-diene terpolymer rubber (EPDM).

19. A roof system comprising:

a. a roof substrate;

b. a polymeric membrane panel for providing a weatherproof polymeric barrier to the roof substrate; and

c. an adhesive layer disposed between the roof substrate and the polymeric membrane, where the adhesive layer is a an ultraviolet (UV) cured pressure-sensitive adhesive that is at least partially cured and where the at least partially cured pressure-sensitive adhesive is characterized by a cross-linked infinite polymer network, and where the adhesive layer has a thickness of at least 102 μ

m.

20. The roof system of claim 19, where the adhesive layer is characterized by a peel strength, when adhered to a stainless steel panel and tested according to PSTC 101, of at least 3.0 psi.