Cool burning gas generant compositions with liquid combustion products

A cool burning gas generant composition for an automotive inflatable restraint system comprising:

• a bismuth-containing compound selected from the group consisting of:
• bismuth citrate, bismuth subsalicylate, bismuth hydroxide, copper bismuth hydroxy nitrate, bismuth subcarbonate, bismuth suboxalate, and combinations thereof present at greater than or equal to about 2 to less than or equal to about 30 weight % of the cool burning gas generant composition;
• a fuel present at greater than or equal to about 10% to less than or equal to about 50% by weight of the cool burning gas generant composition;
• and
• a copper-containing oxidizer present at greater than or equal to about 30% to less than or equal to about 75% by weight of the cool burning gas generant composition, wherein the cool burning gas generant composition has a maximum flame temperature at combustion (Tc) of less than or equal to about 1700K (1,427° C.), wherein the cool burning gas generant composition is configured to generate combustion products in a liquid phase.

A method of inflating a filterless automotive inflatable restraint system comprising:

• combusting a cool burning gas generant in a filterless inflator device at a maximum flame temperature at combustion (Tc) of less than or equal to about 1700K (1,427° C.) to generate gas and combustion products in a liquid phase, wherein the cool burning gas generant comprises a bismuth-containing compound selected from the group consisting of:
• bismuth citrate, bismuth subsalicylate, bismuth hydroxide, copper bismuth hydroxy nitrate, bismuth subcarbonate, bismuth suboxalate, and combinations thereof, at least one copper-containing oxidizer, and at least one fuel;
• and
• plating the combustion products in the liquid phase on exposed surfaces of the filterless inflator device.