Claims
- 1. A method of chemical bonding an isocyanate curable solid propellant composition to the outer surface of the internal insulation of an interceptor solid rocket motor, said method comprising:
- (i) providing a solid propellent rocket motor case having said internal insulation installed therein;
- (ii) degreasing the outer surface of said insulation to yield a degreased insulation surface;
- (iii) spraying said degreased insulation surface with the trimer of 1,6-hexanediisocyanate which is chemically reactive with said degreased insulation surface, said trimer of 1,6-hexanediisocyanate prepared by the process set forth under (a)-(c) below which comprises:
- (a) reacting 1,6-hexanediisocyanate with water to form 1-amino-6-hexaneisocyanate;
- (b) reacting said 1-amino-6-hexaneisocyanate with an additional molecule of 1,6-hexanediisocyanate to form 7-aza-8-oxo-1,6-pentadecanediisocyanate; and,
- (c) reacting said 7-aza-8-oxo-1,6-pentadecanediisocyanate with another molecule of 1,6-hexanediisocyanate to form the triisocyanate whose chemical name in accordance with the International Union of Pure and Applied Chemistry is 7-aza-8-oxo-7-pentadecanediisocyanate;
- (iv) placing said solid propellant composition onto said trimer of 1,6-hexane diisocyanate which is chemically reactive with said solid propellant composition; and,
- (v) forming a chemical bond between said solid propellant composition and said insulation surface with said trimer of 1,6-hexanediisocyanate with which said solid propellant composition and said insulation chemically react to form a chemical bonding to thereby complete said method of chemical bonding said isocyanate curable solid propellant composition to said surface of said internal insulation of an interceptor solid rocket motor.
- 2. The method of chemical bonding an isocyanate curable solid propellant composition as defined in claim 1 wherein said internal insulation installed in said solid propellant rocket motor case is formulated with ethylene-propylene-diene monomer prepolymer, peroxide-cured, and plasticized with 9 weight percent dioctyl sebacate.
- 3. The method of chemical bonding an isocyanate curable solid propellant composition as defined in claim 2 wherein said placing of said isocyanate curable solid propellant composition onto said trimer is achieved by casting said isocyanate curable solid propellant composition onto said 7-aza-8-oxo-7--pentadecanediisocyanate.
DEDICATORY CLAUSE
The invention described herein may be manufactured, used, and licensed by or for the Government for governmental purposes without the payment to me of any royalties thereon.
US Referenced Citations (8)