Abstract: A method of preparing nitrile elastomer surfaces for bonding by epoxy adhves is presented. A treating solution comprising a dilute concentration of a mineral acid such as HCl in a carrier comprising water and either alcohol or ketones is prepared. The treating solution is applied to the elastomer surface with the surface being hydrolyzed in a mild manner thereby providing an improved adherable surface for covalent bonding by epoxy adhesives. A surfactant can be added to the treating solution for cleaning the surface to enhance the surface treatment.
Type:
Grant
Filed:
July 19, 1982
Date of Patent:
April 10, 1984
Assignee:
The United States of America as represented by the Secretary of the Navy
Abstract: The present invention relates to a method for preparing an in situ cured ster explosive by mixing explosive crystals with a prepolymer solution comprising a carboxyl (or hydroxyl)-terminated hydrophobic polyester and epoxidized linseed oil with chromium octanoate as a catalyst. The explosive mixture is pressed into desired size and cured at 60.degree. C. to 70.degree. C. for about 96 hours. The resulting in situ cured explosive has desirable safety and physical properties.
Type:
Grant
Filed:
August 7, 1980
Date of Patent:
May 31, 1983
Assignee:
The United States of America as represented by the Secretary of the Navy
Inventors:
Russell Reed, Jr., May L. Chan, Horace D. Stanton
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.
Type:
Grant
Filed:
July 21, 1980
Date of Patent:
March 1, 1983
Assignee:
The United States of America as represented by the Secretary of the Navy
Abstract: A new azido compound 1,9-diazido-2,4,6,8-tetranitro-2,4,6,8-tetrazanonane is disclosed, and a method of preparation is disclosed wherein 1,9-dichloro-2,4,6,8-tetranitro-2,4,6,8-tetrazanonane or 1,9-dinitroxy-2,4,6,8-tetranitro-2,4,6,8-tetrazanonane is reacted with sodium azide and dimethylformamide. This new azido compound is useful as an explosive, propellant, or component thereof to modify properties.
Type:
Grant
Filed:
April 21, 1981
Date of Patent:
December 7, 1982
Assignee:
The United States of America as represented by the Secretary of the Navy
Abstract: The present invention relates to an improved propellant or explosive and hod for making it having increased energy yet having increased toughness and hazard properties. More specifically, an HMX or RDX material is coated with a nitrocellulose, poly-hydroxyethyl acrylate or poly-hydroxymethyl acrylate for bonding hydroxyl groups that subsequently allows reaction with amine silane/s or a polymer of the type ##STR1## wherein n is an integer of 3 or 4, m is an integer of 2 or 3, and R is methyl or ethyl. Further coating of the product is then carried out with a primary hydroxyl forming material and then curing the product in the presence of an isocyanate.
Type:
Grant
Filed:
March 31, 1980
Date of Patent:
September 21, 1982
Assignee:
The United States of America as represented by the Secretary of the Navy