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특허 상세정보

Method of stabilizing the density of gas generant pellets containing nitroguanidine

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) C06B-021/00   
미국특허분류(USC) 149/109.6; 149/047; 149/048; 264/003.4
출원번호 US-0768684 (2001-01-24)
발명자 / 주소
출원인 / 주소
대리인 / 주소
    Rieger, Jarett
인용정보 피인용 횟수 : 2  인용 특허 : 11
초록

A non azide gas generant composition of nitroguanidine and phase stabilized ammonium nitrate is provided. This gas generant composition has many desirable characteristics such as little production of ash and the production of essentially toxic free exhaust gas. When nitroguanidine is compressed into a pellet it has needle shaped crystals that bend or distort. When the gas generant pellets are subjected to thermal cycling some nitroguanidine crystals will return to their native conformation resulting in pellet growth. To eliminate this pellet growth, nitr...

대표
청구항

1. A process for preparing an azide-free gas generant composition that produces exhaust gases on combustion for inflating a vehicle restraint device, said composition comprising phase stabilized ammonium nitrate and nitroguanidine, said process comprising the steps of: a. grinding nitroguanidine into an amorphous crumb by using a vibrating ball mill, and b. mixing the nitroguanidine with the phase stabilized ammonium nitrate. 2. The process of claim 1, wherein the gas generant comprises about 32-50% by weight of nitroguanidine and 50-68% by weight ...

이 특허에 인용된 특허 (11)

  1. Lundstrom Norman H. ; Scheffee Robert S. ; Luke Daniel S.. Nonazide ammonium nitrate based gas generant compositions that burn at ambient pressure. USP2000016017404.
  2. Lundstrom Norman H. ; Khandhadia Paresh S.. Nonazide gas generating compositions. USP1998055756929.
  3. Zeuner Siegfried,DEX ; Hofmann Achim,DEX ; Schropp Roland,DEX ; Rodig Karl-Heinz,DEX. Particle-free, gas-producing mixture. USP1999115989367.
  4. Poole Donald R. (Woodinville WA). Process for preparing azide-free gas generant composition. USP1996075531941.
  5. Engel, Walter; Heinisch, Herbert. Process for the preparation of compact nitroguanidine. USP1985104544769.
  6. Scheffee Robert S. ; Thibodeau Robert Lee ; Wheatley Brian K.. Pyrotechnic method of generating a particulate-free, non-toxic odorless and colorless gas. USP1998055747730.
  7. Sanchez John A. (Los Alamos NM) Roemer Edward L. (Los Alamos NM) Stretz Lawrence A. (Los Alamos NM). Spherical nitroguanidine process. USP1990104967000.
  8. Holland Gary F. (Snohomish WA) Poole Donald R. (South Colby WA) Wolf Nicholas A. (Renton WA) Wilson Michael A. (Bothell WA). Thermally stable gas generating composition. USP1997065641938.
  9. Poole Donald R. (South Colby WA) Holland Gary F. (Snohomish WA) Wolf Nicholas A. (Renton WA) Wilson Michael A. (Bothell WA). Thermally stable gas generating composition. USP1996085545272.
  10. Khandhadia Paresh S. ; Burns Sean P.. Thermally stable nonazide automotive airbag propellants. USP2001106306232.
  11. Hinshaw Jerald C. ; Doll Daniel W. ; Blau Reed J. ; Lund Gary K.. Using metal complex compositions as gas generants. USP1998045735118.