|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||149/194 ; 149/60 ; 149/61 ; 149/76|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 9 인용 특허 : 7|
The present invention relates to the field of compound pyrotechnic products. The invention relates to a three-step, solvent-free process for the manufacture of compound pyrotechnic products containing a thermosetting binder obtained by reaction of a polyhydroxylated prepolymer with a diisocyanate, which process is characterized in that: in a first step the said prepolymer is mixed with an energetic charge and with a quantity of diisocyanate representing 50 to 90% of the required stoichiometric quantity, in a second step the remainder required to attain t...
Process for the manufacture of compound pyrotechnic products consisting essentially of, a polyurethane binder obtained by the reaction of a polyhydroxylated prepolymer with a diisocyanate and at least one inorganic or organic energetic charge, wherein said polyhydroxylated prepolymer has a weight average molecular mass between 2,000 and 5,000 and an average hydroxyl OH group functionality greater than 2 and less than 3 and said process being comprised of the steps of (1) mixing said polyhydroxylated prepolymer with said energetic charge and with a quanti...