Hybrid inflator with crystalline and amorphous block copolymer

A hybrid inflator for a vehicle occupant protection device comprising:

• (a) a stored inflation fluid;
• (b) a body of an ignitable combustible material in an effective amount which, when ignited, provides hot combustion products to heat the stored inflation fluid and increase its pressure;
• said body of ignitable combustible material comprising
• Solid Organic Polymeric Binder 15 to 40 wt. %
• oxygenated plasticizer 5 to 30 wt. %
• Potassium perchlorate 20 to 5 wt. %
• Ammonium perchlorate and/or ammonium nitrate 15 to 60 wt. %
• wherein said solid organic polymeric binder is a thermoplastic block copolymer comprising at least one amorphous polymeric block and at least one crystalline polymeric block and contains oxygen atoms in the amount of at least about 20 wt. %.

A hybrid inflator for a vehicle occupant protection device comprising:

• (a) a stored inflation fluid;
• (b) a body of an ignitable combustible material in an effective amount which, when ignited, provides hot combustion products to heat the stored inflation fluid and increase its pressure;
• said body of ignitable combustible material having an extruded or molded configuration and comprising a combustible solid organic polymeric fuel binder and an inorganic oxidizing agent, said solid organic polymeric fuel binder comprising a thermoplastic block copolymer of at least one amorphous block in an effective amount whereby the block copolymer has a melting point in the range of 100.degree. C. to 130.degree. C., and at least one crystalline block in an effective amount whereby the block copolymer has a Durometer D hardness greater than about 30,
• said block copolymer containing oxygen atoms in the amount of at least 20 wt. %.

A hybrid inflator for a vehicle occupant protection device comprising:

• (a) a stored inflation fluid;
• (b) a body of an ignitable combustible material in an effective amount which, when ignited, provides hot combustion products to heat the stored inflation fluid and increase its pressure;
• said body of ignitable combustible material having an extruded or molded configuration and comprising a combustible solid organic polymeric fuel binder and an inorganic oxidizing agent, said solid organic polymeric fuel binder comprising a thermoplastic block copolymer of at least one amorphous block and at least one crystalline block wherein said amorphous block is present in an effective amount to facilitate extrudability or moldability of the body of ignitable combustible material at a temperature in the range of 100.degree. C. to 130.degree. C. and to impart non-brittleness to said body at -40.degree. C. and said crystalline block is present in an effective amount to resist slump when the body of combustible ignitable material is subjected to a simulated aging test in which said body is held at temperatures starting at 95.degree. C. increasing to 120.degree. C., in 5.degree. C. increments, for one hour at each temperature;
• said block copolymer containing oxygen atoms in the amount of at least 20 wt. %.