Coated fabric structure for air bag applications
First Claim
1. A coated, fabric comprising a fabric substrate and a coating at least partially covering said substrate, said coating comprising a polyurethane formed from a polyol mixture of a polycarbonate polyol and a polyether polyol, a diisocyanate compound and first and second extender components, wherein the diisocyanate compound is initially reacted with the first extender component in a molar ratio of above 2:
- 1 to form a modified diisocyanate component having a functionality of about 2 prior to reaction with the polyol mixture and the second extender component.
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Accused Products
Abstract
A fabric substrate which is at least partially or selectively coated with a novel polycarbonate-polyether polyurethane for use as a driver'"'"'s side or passenger side air bag. The polyurethane coating is applied in a manner which provides a desired permeability to the fabric, allows the fabric to be cut without fraying the fibers of the substrate, and imparts flexibility toughness and tear resistance to the final product.
206 Citations
20 Claims
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1. A coated, fabric comprising a fabric substrate and a coating at least partially covering said substrate, said coating comprising a polyurethane formed from a polyol mixture of a polycarbonate polyol and a polyether polyol, a diisocyanate compound and first and second extender components, wherein the diisocyanate compound is initially reacted with the first extender component in a molar ratio of above 2:
- 1 to form a modified diisocyanate component having a functionality of about 2 prior to reaction with the polyol mixture and the second extender component.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A coated fabric comprising a fabric substrate having a weight of between about 2 and 8 ounces per square yard and a coating at least partially covering said substrate, said coating comprising a linear polyurethane formed from a polyol mixture of a polycarbonate polyol and a polyether polyol, a diisocyanate compound, and first and second extender components, wherein the first extender component has a molecular weight of 500 or less and the diisocyanate compound is initially reacted with the first extender component in a molar ratio of above 2:
- 1 to form a modified diisocyanate component having a functionality of about 2 prior to sequential reaction with the polyol mixture and the second extender component.
- View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A coated fabric comprising a fabric substrate having a weight of between about 2 and 8 ounces per square yard and a coating substantially covering said substrate, said coating comprising a linear polyurethane formed from a polyol mixture of a polycarbonate polyol and a polyether polyol, a diisocyanate compound, and first and second extender components, wherein the first extender component has a molecular weight of 500 or less and the diisocyanate compound is initially reacted with the first extender component in a molar ratio of above 2:
- 1 to form a modified diisocyanate component having a functionality of about 2 prior to sequential reaction with the polyol mixture and the second extender component.
- View Dependent Claims (18, 19, 20)
Specification