Pyrotechnic compositions generating clean and nontoxic gases, containing a thermoplastic elastomer binder
First Claim
1. Pyrotechnic composition whose combustion products are nontoxic gases free of solid residue, consisting essentially of a binder which is a thermoplastic elastomer, of an energetic plasticizer, of an oxidizing charge and additives intended to control the burning, characterized in that the said binder is an oxygen-containing thermoplastic elastomer, in that the said plasticizer is a product of polymerization of glycidyl azide and in that at least 85% of the weight of the said oxidizing charge consists of ammonium nitrate.
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Abstract
The present invention relates to the field of gas-generating pyrotechnic compositions intended for motor vehicle safety.
The compositions according to the invention include:
an oxygen-containing thermoplastic binder and especially a block aliphatic copolymer of formula: ##STR1## in which: PA is a polyamide block,
PE is a polyether block,
n is a number between 2 and 10,
an energetic plasticizer which is a polyglycidyl azide,
an oxidizing charge in which at least 85% of its weight consists of ammonium nitrate.
The compositions according to the invention burn without solid residues and can be employed in gas generators without a filter chamber.
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Citations
8 Claims
- 1. Pyrotechnic composition whose combustion products are nontoxic gases free of solid residue, consisting essentially of a binder which is a thermoplastic elastomer, of an energetic plasticizer, of an oxidizing charge and additives intended to control the burning, characterized in that the said binder is an oxygen-containing thermoplastic elastomer, in that the said plasticizer is a product of polymerization of glycidyl azide and in that at least 85% of the weight of the said oxidizing charge consists of ammonium nitrate.
Specification