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US 5,418,054 AGranted
Flame-retardant, waterproof and breathable expanded PTFE laminate
AssigneeW. L. Gore & Associates, Inc.
InventorKwok K. Sun
Life of this patent
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Abstract
A waterproof and breathable flame-retardant laminate of two layers of porous expanded polytetrafluoroethylene laminated together by a flame-retardant adhesive layer of poly(urea-urethane) polymer containing phosphorus ester groups built into the chains of the polymer. The flame-retardant components do not wash out of the adhesive and laminate under repeated laundering or dry cleaning.
Claims7
A waterproof and breathable flame-retardant laminate comprising:
- (a) a first layer of porous expanded polytetrafluoroethylene membrane adhered to a
- (b) second layer of porous expanded polytetrafluoroethylene membrane by a layer of
- (c) phosphorus-containing poly(urea-urethane) adhesive.
Dependencies are inferred from the claim text.