Extrudable pressure sensitive adhesive composition and methods for preparing the same
AssigneeFirestone Building Products Company, LLC
InventorsJiansheng Tang, John Fieldhouse
Life of this patent
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Abstract
A phase-separated polymeric composition is provided that comprises a first phase including polyurethane domains and a second phase including a butyl rubber matrix. A method is also provided for producing a polymer composition. The method includes providing a masterbatch composition that is prepared by combining a halogenated butyl rubber with at least one phenolic resin, introducing the masterbatch composition to a reactor, introducing to the reactor an isocyanate and a polyurethane catalyst to form a blend, and subjecting the blend to conditions sufficient to form a polyurethane.
Claims7
A method for producing a polymer blend that includes butyl rubber and polyurethane, the method comprising:
- i. providing a masterbatch composition that is prepared by combining a halogenated butyl rubber with at least one unfunctionalized phenolic resin, to form a partially crosslinked butyl rubber;
- ii. introducing the masterbatch composition and, optionally, additional unfunctionalized phenolic resin to a reactor;
- iii, introducing an isocyanate and a polyurethane catalyst to the reactor containing the masterbatch composition;
- and
- iv. subjecting the reactor to conditions sufficient to form a polyurethane in the presence of the partially crosslinked butyl rubber, thereby forming a polymer blend of butyl rubber and polyurethane.
Dependencies are inferred from the claim text.