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US 4,375,522 AGranted
Thixotropic restrictor, curable at room temperature, for use on solid propellant grains
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorJohn D. Braun
Life of this patent
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Abstract
A solid propellant restrictor for preventing erosive burning in solid prolant grain critical areas is described. The restrictor is a mixture of hydroxyl-terminated polybutadiene with 1% by weight of dissolved 2,2'-methylene-bis(4-methyl-6-tert-butyl) phenol, dioctyl adipate, triethanolamine, ferric acetylacetonate, carbon black, aluminum oxide, silicon oxide, and toluene diisocyanate, curing at room temperature and illustrates superior hardening, adhesive, and application properties.
Claims4
A solid propellant grain restrictor composition comprising:
- a premix containing hydroxyl-terminated polybutadiene with 1% by weight of dissolved 2,2'-methylene-bis(4-methyl-6-tert-butyl) phenol antioxidant, dioctyl adipate, triethanolamine, ferric acetylacetonate, carbon black, hydrated aluminum oxide, and colloidal silicon dioxide;
- toluene diisocyanate;
- and
- colloidal silicon dioxide.
1 more element
Dependencies are inferred from the claim text.