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US 7,622,187 B2Granted
Adhered roof structure
AssigneeCarlisle Intangible Company
InventorsSteven R. Clarke, Michael J. Scanish, Robert C. Shiffer
Life of this patent
Estimating the term…
Abstract
A membrane roof includes a supporting substrate covered with a roofing membrane. The roofing membrane is adhered to the substrate utilizing an adhesive such as a foam polyurethane adhesive. The adhesive has an elongation of at least 100% and a modulus no greater than 100 psi.
Claims6
A roof structure comprising a roof membrane and a roof substrate, a first surface of said membrane adhered to said substrate by a foaming polyurethane adhesive, said adhesive having an elongation of at least about 100% and a modulus less than about 100 psi at 150% elongation;
- wherein said polyurethane is formed from a polyol and an isocyanate prepolymer and wherein said polyol has a molecular weight of at least about 3000;
- and
- wherein said isocyanate prepolymer has an isocyanate content of no greater than about 25% by weight.
Dependencies are inferred from the claim text.