Liquid polymeric coating compositions and air bags coated therewith
AssigneeMilliken & Company
InventorRichard Parker
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Abstract
A coating composition for air bag fabrics is disclosed, the composition being comprised of liquid silicone rubbers and liquid organic polymers that are chemically reacted to form cross-linked polymer networks with silicone and non-silicone components. By adding liquid organic polymers to liquid silicone rubber compounds as described herein, coatings for air bags that show increased retention of the inflating air have been discovered. Beneficially, the production of these coatings is achieved without the use of organic solvents. An air bag coated with the present formulation is also disclosed.
Claims30
A coating formulation made by combining
- (a) a vinyl-containing liquid silicone polymer compounded with an organohydrogenpolysiloxane cross-linking agent and a platinum catalyst and
- (b) an organic polymer in liquid form, said organic polymer containing unsaturated C═C bonds,
- wherein said silicone polymer and said organic polymer react, during curing, to form a cross-linked polymer network.
A fabric substrate, at least a portion of said fabric substrate being coated with a coating formulation comprising a reaction product of (a) at least one organic polymer and (b) a compounded silicone polymer.
An automotive air bag, said air bag comprising a fabric substrate, wherein at least a portion of said fabric substrate is coated with a coating formulation comprising a reaction product of (a) at least one organic polymer having unsaturated C═C bonds and (b) a compounded silicone polymer, said compounded silicone polymer comprising a vinyl-containing polysiloxane, a platinum catalyst, and a liquid organohydrogenpolysiloxane cross-linking agent.
A method for forming a cross-linked polymer network on an air bag substrate, said method comprising the steps of:
- (a) providing a compounded silicone polymer, said compounded silicone polymer comprising a vinyl-containing polysiloxane, a platinum catalyst, and a liquid organohydrogenpolysiloxane cross-linking agent;
- (b) admixing said compounded silicone polymer with a liquid organic polymer to create a polymer dispersion, wherein said liquid organic polymer has at least one unsaturated carbon-carbon double bond;
- (c) applying the polymer dispersion to an air bag substrate;
- and
- (d) reacting the polymer dispersion with heat, in the presence of a catalyst, to form a cross-linked polymer network on said air bag substrate.
Dependencies are inferred from the claim text.