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US 5,209,969 AGranted
Carbamate/urethane composition and textile lamination process
AssigneeW. L. Gore & Associates, Inc.
InventorGlenn W. Crowther
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Abstract
A storage stable adhesive mixture of hexamethylenediamine carbamate and the reaction product of ethylene/propylene oxide polyol and a polyurethane prepolymer of diphenyl methane diisocyanate, polytetramethylene glycol, and optionally, 1,4-butanediol; and a process for using the adhesive to laminate fabric to polymeric membrane is also described.
Claims3
Process for laminating a fabric to a polymeric membrane, which comprises
- A) applying a storage stable adhesive mixture of
- a) hexamethylenediamine carbamate, and
- b) the reaction product of
- i) ethylene/propylene oxide polyol, and
- ii) a polyurethane prepolymer of
- a) diphenyl methane diisocyanate
- b) polytetramethylene glycol, and optionally,
- c) 1,4-butanediol
- to a fabric,
- B) causing the membrane to be placed against the fabric on the side the mixture is on,
- C) heating the resulting combination at 150.degree.-180.degree. C. whereby the heat causes the carbamate to decompose forming hexamethylenediamine and releasing CO.sub.2 which causes foaming and forces the composition to spread, and which causes the hexamethylenediamine to react with --NCO groups of said reaction product.
8 more elements
Dependencies are inferred from the claim text.