Peel and stick roofing membranes with cured pressure-sensitive adhesives
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.
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 μm.
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 μm.
9. The membrane composite of claim 1 , where the adhesive layer has a thickness of from about 127 to about 305 μm.
10. The membrane composite of claim 1 , where the adhesive layer has a thickness of at least 152 μm.
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 μm 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 μm.
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.