Back to results
US 4,241,131 AGranted
Moldable polyurethane foam-backed fabrics
AssigneeMobay Chemical Corporation
InventorRobert J. Bailey
Life of this patent
Estimating the term…
Abstract
The invention relates to a process wherein A a heat curable froth or foamable mixture of polyurethane reaction components is applied to the back of a fabric, B the coated fabric is heated to form a gelled, tack-free and storable foam-backed fabric and C the fabric is shaped and cured using a hot molding process. The polyurethane formulation contains a hydroxy functional ester of an acrylic or alkyl acrylic acid and a free radical initiator.
Claims13
A process for preparing a molded, polyurethane foam-backed fabric comprising the steps of:
- (A) applying a foamable mixture or froth of polyurethane reaction components to the back of a fabric, said reaction components consisting essentially of:
- (1) a polyisocyanate;
- (2) an organic compound containing at least two hydrogen atoms capable of reacting with isocyanate groups, having a molecular weight of between 400 and 16,000 and containing essentially no ethylenically unsaturated groups;
- (3) hydroxyl containing esters of acrylic and alkyl acrylic acids;
- (4) a free radical initiator;
- (5) a heat activated catalyst for the reaction between components (1) and (2);
- (6) a blowing agent, or inert gas for frothing;
- (7) a surface active agent for foam stability;
- (B) heating the coated fabric for from 15 seconds to 10 minutes at a temperature of from about 80.degree. to about 250.degree. F. to allow the polyurethane reaction to proceed to produce a fully foamed, gelled, tack-free polyurethane foam;
- and
- (C) thereafter molding the resultant foam-backed fabric by a hot-molding process to produce a complex shape.
8 more elements
Dependencies are inferred from the claim text.