Vehicle occupant protection device and solid solution gas generating composition therefor
First Claim
1. A vehicle occupant protection device comprising a body of gas generating material, said body consisting essentially of:
- (a) a solid solution of (i) a water soluble liquid oxidizer;
(ii) a hydrophilic polymeric gelling agent wherein said gelling agent comprises an effective amount of carbon atoms to provide a combustible mixture with said liquid oxidizer in said body of gas generating material;
(iii) zero to about 5% ammonium nitrate; and
(iv) about 5% to about 25% water;
the amounts of (i) through (iv) being based on the weight of gas generating material.
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Accused Products
Abstract
A vehicle occupant protection device comprises a body of gas generating material which comprises a solid solution of a water soluble liquid oxidizer and a hydrophilic polymeric gelling agent. The gelling agent comprises carbon atoms in an effective amount to function as a fuel with the liquid oxidizer. The solid solution also comprises water, preferably in the amount of about 5% to about 25% based on the weight of the body of gas generating material. The water reduces the temperature of the gas which is produced and also increases its volume, making the gas generating material suitable for a vehicle occupant protection device. A preferred oxidizer is hydroxyl ammonium nitrate or derivative thereof. A preferred gelling agent is polyvinyl alcohol.
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Citations
17 Claims
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1. A vehicle occupant protection device comprising a body of gas generating material, said body consisting essentially of:
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(a) a solid solution of (i) a water soluble liquid oxidizer;
(ii) a hydrophilic polymeric gelling agent wherein said gelling agent comprises an effective amount of carbon atoms to provide a combustible mixture with said liquid oxidizer in said body of gas generating material;
(iii) zero to about 5% ammonium nitrate; and
(iv) about 5% to about 25% water;
the amounts of (i) through (iv) being based on the weight of gas generating material. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A vehicle occupant protection device comprising a body of gas generating material, said body of gas generating material comprising a solid solution of:
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(i) a water soluble liquid oxidizer;
(ii) a hydrophilic polymeric gelling agent wherein said gelling agent comprises an effective amount of carbon atoms to provide a combustible mixture with said liquid oxidizer in said body of gas generating material; and
(iii) about 5% to about 25% water based on the weight of the gas generating material;
wherein the body of gas generating material has a burn rate less than about 1 inch/sec at 2,000 psi. - View Dependent Claims (16, 17)
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9. A vehicle occupant protection device comprising a body of gas generating material, said body of gas generating material comprising a solid solution of:
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(i) hydroxyl ammonium nitrate or a derivative thereof;
(ii) polyvinyl alcohol; and
(iii) about 5% to about 25% water based on the weight of the gas generating material. - View Dependent Claims (10, 11)
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12. A vehicle occupant protection device comprising a body of gas generating material, said body of gas generating material comprising, on a weight basis, a solid solution of:
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(i) about 50% to about 90% hydroxyl ammonium nitrate;
(ii) about 5% to about 25% polyvinyl alcohol; and
(iii) about 5% to about 25% water. - View Dependent Claims (13)
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14. A vehicle occupant protection device comprising a body of gas generating material, said body of gas generating material comprising, on a weight basis, a solid solution of:
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(i) about 50% to about 90% hydroxyl ammonium nitrate;
(ii) about 5% to about 25% polyvinyl alcohol;
(iii) about 5% to about 25% water; and
(iv) zero to about 5% ammonium nitrate.
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15. A vehicle occupant protection device comprising a body of gas generating material, said body of gas generating material consisting essentially of, on a weight basis, a solid solution of:
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(i) about 50% to about 90% hydroxyl ammonium nitrate;
(ii) about 5% to about 25% polyvinyl alcohol;
(iii) about 5% to about 25% water; and
(iv) zero to about 5% ammonium nitrate.
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Specification