|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||149/194 ; 149/20|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 25 인용 특허 : 4|
Poly(caprolactone) polymers are provided having molecular weights of 4000 or higher, are used to form propellant binders. When the high molecular weight poly(caprolactone) polymers are used in propellant formulations and cured with isocyanates of adequate functionality, propellants are produced having improved stress and strain characteristics relative to presently formulated propellants having binders of cured, lower molecular weight poly(caprolactone) polymers.
A solid propellant composition comprising between about 70 and about 85 weight percent particulate material including particulate fuel material and particulate oxidizer material, balance consisting essentially of binder and nitrate ester plasticizer at a plasticizer to binder weight ratio of at least about 2.0:1, said binder being an elastomer formed from poly(caprolactone) and an isocyanate curative, the improvement comprising said poly(caprolactone) having a number average molecular weight of from about 4000 to about 20,000.