Adhesive composition and method for providing water-tight joints in single-ply roofing membranes
AssigneeAdco Products, Inc.
InventorsBrian J. Briddell, Michael J. Hubbard
Life of this patent
Estimating the term…
Abstract
A cured adhesive tape composition for adhering together roofing materials such as synthetic EPDM rubber and which provides long term water tightness is provided. The adhesive composition includes substantially equal amounts by weight of a) a rubbery polymer comprising a blend of an ethylene-propylenediene terpolymer, a halogenated butyl rubber or a halogenated copolymer of p-methylstyrene and isobutylene, and polyisobutylene b) a compatible tackifier, and c) an accelerator/cure package for the rubbery polymer. The cured composition exhibits a peel strength of at least 715 grams/cm at room temperature, at least 300 grams/cm at 70.degree. C., and supports a static load of at least 300 grams at 70.degree. C.
Claims12
A cured adhesive composition for adhering together EPDM roofing materials comprising substantially equal amounts by weight of a) a rubbery polymer comprising a blend of an ethylene-propylene-diene terpolymer, a halogenated butyl rubber or a halogenated copolymer of p-methylstyrene and isobutylene, and polyisobutylene and b) a compatible tackifier, said composition further comprising an accelerator/cure package for said rubbery polymer, said composition being fully vulcanized prior to use by heating to achieve essentially full crosslinking of the components, said composition having a peel strength of at least 715 grams/cm at room temperature, at least 300 grams/cm at 70.degree. C., and supports a static load of at least 300 grams at 70.degree. C.
A cured adhesive composition for adhering together roofing materials consisting essentially of:
- a) from about 35-45% of a rubbery polymer, b) from about 35-45% of a compatible tackifier, c) from about 5-9% of a plasticizer, and d) from about 1-6% of an accelerator/cure package, the resulting composition being fully vulcanized prior to use by heating to achieve essentially full crosslinking of the components, said composition being cured sufficiently to support a static load of at least 300 grams at 70.degree. C., have a peel strength of at least 715 grams/cm at room temperature and at least 300 grams/cm at 70.degree. C.
A roofing membrane adhesive tape comprising a layer of a cured adhesive composition in the form of a strip on a release liner, said adhesive composition comprising substantially equal amounts by weight of a) a rubbery polymer comprising a blend of an ethylene-propylene-diene terpolymer, a halogenated butyl rubber or a halogenated copolymer of p-methylstyrene and isobutylene, and polyisobutylene and b) a compatible tackifier, said composition further comprising an accelerator/cure package for said rubbery polymer, said composition having been postcured after formulation but before use by heating to achieve essentially full crosslinking of the components and having a peel strength of at least 715 grams/cm at room temperature, at least 300 grams/cm at 70.degree. C., and supports a static load of at least 300 grams at 70.degree. C.
A roofing membrane adhesive tape comprising a layer of a cured adhesive composition in the form of a strip on a release liner, said adhesive composition comprising substantially equal amounts by weight of a) a rubbery polymer comprising a blend of an ethylene-propylene-diene terpolymer, a halogenated copolymer of p-methylstyrene and isobutylene, and polyisobutylene and b) a compatible tackifier, said composition further comprising an accelerator/cure package for said rubbery polymer, said composition having been postcured after formulation but before use and having a peel strength of at least 715 grams/cm at room temperature, at least 300 grams/cm at 70.degree. C., and supports a static load of at least 300 grams at 70.degree. C.
Dependencies are inferred from the claim text.