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Gas generating composition

a technology of gas generating composition and gas, which is applied in the direction of explosives, pedestrian/occupant safety arrangements, vehicular safety arrangements, etc., can solve the problems of small and light inflators, the burning rate and the amount of generated gas are reduced, and the inability to obtain small ones

Inactive Publication Date: 2012-03-08
DAICEL CHEM IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a gas generating composition for use in inflators of vehicle airbag apparatuses that reduces the calorific value per mol of generated gas without affecting burning rate or gas output. The gas generating composition has no problem with the amount of mist or harmful gas concentration generated in combustion. The invention achieves this by using a fuel and an oxidizing agent, with the oxidizing agent comprising basic copper carbonate, which has a content of more than 40% by mass and 60% by mass or lower. The gas generating composition satisfies the requirements of a burning rate of 7.0 mm / sec or above, a gas output of 2.30 mol / 100 g or above, and a calorific value per mol of the generated gas of 100 kJ / mol or lower.

Problems solved by technology

However, reducing the combustion temperature of the gas generating agent often leads to a decrease in burning rate and an amount of generated gas.
In order to mend this problem, a method for increasing the amount of the gas generating agent for charging an inflator is considered, but with this method, a small and light inflator cannot be obtained.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

examples

[0048]

[0049][Method for Forming a Measuring Strand]

[0050]The components of the gas generating composition were adequately mixed in the proportions shown in Table 1, and thereafter 30 g thereof was obtained. Water in an amount of 6 g was added thereto, which was then mixed in an antistatic plastic bag for 5 minutes or longer. The resultant mass was pulverized into small pieces and dried at 110° C. for two hours. The resultant product was then pulverized into powder in a mortar. 1.7 to 2.2 g of the powder was poured into a mold and the pressure of approximately 220 MPa (2250 kgf / cm2) was applied with a hydraulic pump, which was maintained for five seconds, to obtain a cylindrical strand (with a outer diameter of 9.55 mm and a length of 12.70 mm).

[0051][Method of Measurement]

[0052]The measuring strand obtained in the manner described above was left in a temperature of 110° C. for 16 hours to eliminate water therefrom. Subsequently, an epoxy resin adhesive “Bond Quick 30” was applied tw...

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Abstract

The present invention is a gas generating composition including fuel and an oxidizing agent, which can be used for an inflator of a vehicle airbag apparatus, wherein the oxidizing agent includes basic copper carbonate, the gas generating composition having the content of the basic copper carbonate of more than 40% by mass and 60% by mass or lower, and satisfying the following requirements (a) to (c):(a) the burning rate is 7.0 mm / sec or above;(b) the gas output is 2.30 mol / 100 g or above; and(c) the calorific value per mol of generated gas is 100 kJ / mol or lower.

Description

TECHNICAL FIELD[0001]The present invention relates to a gas generating composition that can be used for an inflator of a vehicle airbag apparatus.BACKGROUND ARTS[0002]A combustion temperature of a gas generating agent needs to be reduced in order to obtain a small and light inflator for a vehicle airbag apparatus, which is highly demanded in recent years. However, reducing the combustion temperature of the gas generating agent often leads to a decrease in burning rate and an amount of generated gas. In order to mend this problem, a method for increasing the amount of the gas generating agent for charging an inflator is considered, but with this method, a small and light inflator cannot be obtained. In order to solve such a problem, it is desired to use “calorific value per mol of generated gas” as an index. It is normally desired that appropriate burning rate or gas output be realized, while keeping a calorific value per mol of generated gas of. approximately 100 kJ / mol or less.[000...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C06B31/00C06B45/10C06B43/00B60R21/26B60R21/264C06B31/02C06C7/00C06D5/00
CPCC06D5/06
Inventor KOBAYASHI, SYOUJI
Owner DAICEL CHEM IND LTD
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