|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||102/287 ; 102/291 ; 199/1993|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 9 인용 특허 : 0|
Compositions and methods for increasing the storage life of a propellant grain by reducing the rate of decomposition of its nitrate ester components. A nitrate ester stabilizer is placed in a layer adjacent to a nonburning surface of the propellant grain. The stabilizer migrates from the layer into the grain\s nonburning surface to provide additional stabilization for the entire grain, especially portions of the grain adjacent to the protected nonburning surface.
The combination of: A. A propellant grain comprising at least one nitrate ester and having a nonburning surface; and B. at least one stabilizing layer adjacent to said nonburning surface, comprising more than 10% by weight of a nitrate ester stabilizer; wherein said nitrate ester stabilizer is capable of migrating from said stabilizing layer into said propellant grain through said nonburning surface in a quantity sufficient to stabilize said nitrate ester in the portion of said grain adjacent to said nonburning surface.