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.

Abstract: A multiple component catalyst system for curing of energetic urethane bins for solid fuel propellants and gas generators based upon curing of glycidyl-azide polymer and isocynate curative mixtures. Void or bubble free propellant grains are obtained by employing a cure catalyst composed of a mixture of triphenyl bismuth and dibutyltin dilaurate, preferably in a respective ratio of about 10:1 by weight. The void free propellant grains have burn characteristics acceptable for missile propulsion applications.

Abstract: A gas generant propellant composition having low flame temperatures comprng (a) an elastomeric binder consisting of a mixture of polyethylene capped polypropylene glycol and a dihydroxy tetrazole selected from the group having the formulas: ##STR1## (b) a curative agent such as the biuret trimer of hexamethylene diisocyanate; (c) a plasticizer agent such as 1-methyl-5 (methoxyethyl) tetrazole; (d) a coolant agent such as oxamide; and (e) a deflagrating agent selected from the group consisting of: dihydrazinium 3,6-bis(5-tetrazolyl)-1,2-dihydrotetrazine, dinitrosopentamethylenetetramine, the reaction product of glyoxal and hydrazine and the ammonium salt of 5-nitramino tetrazole.

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.

Abstract: An explosive slurry containing red water, a nitrocellulose containing prolant, oxidizer, passivated aluminum and a thickening agent.

Abstract: Explosive compositions containing a polyurethane binder which will degrade pon contact with dilute mineral acids or aqueous ammonia.

Abstract: HMX-containing gun propellants having good thermal stability and mechanical properties are made by mixing HMX with a polymerizable binder, a polyacrylate cross-linking agent and a polymerization catalyst and extruding the mixture into hot water to form cured pellets of propellant. The binder comprises a long chain acrylic monomer of 14 to 24 carbon atoms or a blend of such a long chain monomer and a shorter chain monomer having 6 to 13 carbon atoms. The molar ratio of short chain acrylic monomer to long chain monomer may vary from 0:1 to 3:1.

Abstract: A method for stabilizing the soil wherein a liquid selected from the group onsisting of (1) a mixture of dimer diisocyanate and dimer diamine; and (2 ) a mixture of dimer diisocyanate and a ketimine derivative of dimer diamine is applied to the soil and allowed to polymerize to form an elastomeric resin which bonds the soil particles together to form a composite structure.

Abstract: A device for monitoring for the presence of ethylene oxide gas comprising indicator which undergoes color change in the presence of ethylene oxide and a scrubber system to keep the device from being too sensitive. The scrubber system preferably employs activated charcoal coated with silicotungstic acid as the scrubber material.

Abstract: The water and oil resistance of caseless gun propellant compositions of the type which comprise cyclotetramethylenetetramine (HMX) as the high energy component and polyurethane as the binder are improved by preparing the binder by reaction of isocyanates with a hydroxyl-terminated block copolymer of ethylene oxide and propylene oxide or mixture of the block copolymer with other hydroxyl-terminated polyalkylene oxides. The block copolymer preferably contains from 40% to 60% by weight of ethylene oxide units and comprises at least 15% by weight of the binder.

Abstract: Gun propellant is coated with an oligomer having the structure: ##STR1## wherein R is --CH.sub.2 CH.sub.2 CH.sub.2 Si(OCH.sub.3).sub.3 ; wherein n s an integer of from 5 to 50 and wherein m is an integer of from 1 to 5. The purpose of the coating is to decrease the peak pressure produced but make the pressure that is produced last longer.

Abstract: The compositions use oxidizers of HMX, RDX, ammonium nitrate, ammonium picrate and ammonium bitetrazole, and binders of lauryl methacrylate, glycidyl methacrylate, hydroxyethyl methacrylate, vinylene carbonate, polyformaldehyde mixtures were vinylene carbonate, and urethanes of polyethylene glycol and polyphenyl methylene isocyanate.

Abstract: A propellant formulation comprising a polysulfide binder having the formula -SCH.sub.2 CH.sub.2 OCH.sub.2 OCH.sub.2 CH.sub.2 --S.sub.n wherein n is a positive integer of sufficient magnitude to render the binder an elastomeric solid, ammonium perchlorate, ammonium oxalate and iron oxide. The formulation has properties which render it useful for generating gas to pressurize the fuel systems in air-breathing missiles.

Abstract: Composite gun propellants are prepared wherein the burning rate and burning ate exponent are controlled by proper choice of particle size. This invention permits the formulation of practical, high impetus, composite gun propellants, tailored specifically to yield the desired ballistic properties for a specific round.

Abstract: A polymeric bomb liner prepared from a polyvinylidene chloride latex emulsion.

Abstract: Ammonium perchlorate particles having strongly adherent wettable coatings are made by treating the particles with stong amines that displace ammonia to form amine perchlorates at the particle surfaces. Silanylamines are preferred since after amination of the perchlorate the silane groups can be hydrolyzed to siloxanes having good wettability by liquid polymeric propellant binders. The coated perchlorate can be used to produce solid propellants having improved mechanical properties and burning characteristics.

Abstract: A continuous polymer film formed by air-activated cross-linking of polyfuional prepolymers is applied to the surface of a body of water for suppressing evaporation.

Abstract: Cylotetramethylenetetranitramine (HMX) or cyclotrimethylenetrinitramine () and one or more additives are dissolved in a solvent and drops of the solution are dispersed into hot air whereupon the solvent evaporates and fine particles of the explosive with the additive(s) intimately associated are formed. Reactive groups from the additives may then be utilized to facilitate wetting of the explosive by a binder or to chemically attach the explosive to the binder.

Abstract: Calcium formate is heated to a temperature in the range of from 300.degree. to 400.degree. C to form calcium carbonate, hydrogen and carbon monoxide and the gases are bled off. The calcium carbonate is then heated to about 825.degree. C whereby calcium oxide and carbon dioxide are formed and the gas is again bled off. The calcium oxide is then reacted with water to form calcium hydroxide and the calcium hydroxide is reacted with carbon monoxide to regenerate calcium formate and start the process over again. The process provides a convenient method for obtaining a mixture of hydrogen and carbon monoxide gases which are useful for many purposes. The carbon monoxide may be removed from the mixture of gases produced to obtain hydrogen which also finds many uses. Further, a mixture of hydrogen and carbon monoxide suitable for use in the Fischer-Tropsch reaction may be readily produced.

Abstract: A solid rocket propellant composition having a relatively high low pressure deflagration limit (Pdl) and thereby capable of being extinguished with only a relatively small drop in combustion chamber pressure. The composition comprises a major amount of finely divided ammonium perchlorate and a minor amount of fluoroalkyl acrylate or methacrylate polymer as a binder, the weight ratio being from about 4.5:1 to about 6:1.The fluidity of the composition prior to curing can be improved by incorporating a small amount of an acrylate or methacrylate having an oxygen-containing functional group, e.g., hydroxyalkyl, epoxyalkyl and glycerol acrylates and methacrylates.