Patent ID: 6183574
Filing Date: 2001-02-06
Classification: C06B,D03D

Abstract:
A processing procedure for achieving an extended potlife for isocyanate cured minimum smoke propellants containing bismuth compounds and other ingredients comprising polymers, plasticizer(s), carbon, oxidizer(s), ballistic modifiers, chemical aging stabilizer, curing agent, and cure catalyst, said processing procedure comprising completing the steps 1-8 as follows:step 1: weigh polymer, plasticizer(s), and carbon and add to mixer preheated to 150.degree. F.;step 2: add oxidizer(s);step 3: mix under vacuum at 150.degree. F. for 2 hours;step 4: cool to 60.degree. F.;step 5: add chemical aging stabilizer, ballistic modifiers, mix under vacuum for 10 minutes;step 6: add curing agent, cure catalyst, and mix an additional 20 minutes;step 7: cast propellant in containers; and,step 8: place container containing propellant in oven at 140.degree. F. for 7 days.