Basic metal nitrate, process for producing the same and gas generating agent composition

A gas generating composition comprising a fuel and a basic metal nitrate, the basic metal nitrate meeting at least one requirement selected from (a-2) or (a-3):

• (a-2) a specific surface area of particles being 0.4 to 6.0 m2/g;
• (a-3) a bulk density of particles being 0.4 g/ml or more.

A gas generating composition comprising a fuel and a basic metal nitrate, the basic metal nitrate being in the form of secondary particles of coagulated principal particles, the secondary particles meeting at least one requirement selected from (a-2) or (a-3):

• (a-2) a specific surface area of particles being 0.4 to 6.0 m2/g;
• (a-3) a bulk density of particles being 0.4 g/ml or more.

A gas generating composition comprising (a) tetrazole derivatives, guanidine derivatives or a mixture thereof, (b) a basic metal nitrate and (d) a combustion-improving agent.

A gas generating composition comprising (a) tetrazole derivatives, guanidine derivatives or a mixture thereof, (b) a basic metal nitrate, (c) a binder and/or a slag-forming agent, and (d) a combustion-improving agent.

A gas generating composition comprising (a) tetrazole derivatives, guanidine derivatives or a mixture thereof and (b) a basic metal nitrate and meeting at least one requirement selected from the following (1) to (3):

• (1) a weight loss ratio of the gas generating composition when the gas generating composition is retained in a closed state at 90° C. for 1,000 hours or at 110° C. for 400 hours is 2.0% or less,
• (2) concentrations of trace gases contained in a gas generated by the combustion of the gas generating composition, as values measured in a 2,800-liter tank, 400 ppm or less for CO, 40 ppm or less for NO, 8 ppm or less for NO2 and 100 ppm or less for NH3, and
• (3) a maximum internal pressure in a gas generator on the combustion of the gas generating composition is 7,840 to 22,500 kPa.

A gas generating composition comprising (a) tetrazole derivatives, guanidine derivatives or a mixture thereof, (b) a basic metal nitrate and (c) a binder and/or a slag-forming agent and meeting at least one requirement selected from the following (1) to (3):

• (1) a weight loss ratio of the gas generating composition when the gas generating composition is retained in a closed state at 90° C. for 1,000 hours or at 110° C. for 400 hours is 2.0% or less,
• (2) concentrations of trace gases contained in a gas generated by the combustion of the gas generating composition, as values measured in a 2,800-liter tank, 400 ppm or less for CO, 40 ppm or less for NO, 8 ppm or less for NO2 and 100 ppm or less for NH3, and
• (3) a maximum internal pressure in a gas generator on the combustion of the gas generating composition is 7,840 to 22,500 kPa.

A gas generating composition which comprises (a) nitroguanidine, and (b) a basic copper nitrate.

A gas generating composition which comprises (a) dicyandiamide and (b) a basic copper nitrate.

A gas generating composition comprising (a) guanidine nitrate, (b) a basic copper nitrate, and (c) sodium carboxymethylcellulose.

A gas generating composition comprising (a) guanidine nitrate, (b) a basic copper nitrate, (c-1) sodium carboxymethylcellulose, and (c-2) a member selected from the group consisting of polyacrylic amide, aminated compounds of polyacrylic amide, polyacrylic hydrazide, a copolymer of an acrylic amide and a metal salt of acrylic acid, a copolymer of polyacrylic amide and polyacrylic ester, polyvinyl alcohol, acrylic rubber, guar gum, starch, polysaccharides including starch, silicone, molybdenum disulfide, Japanese acid clay, talc, bentonite, diatomaceous earth, kaolin, calcium stearate, silica, alumina, sodium silicate, silicon nitrate, silicon carbide, hydrotalcite, mica, a metal oxide, a metal hydroxide, a metal carbonate, a basic metal carbonate, and a molybdate.