Abstract: Anion exchange resins containing borohydride counter ions display essentially the same chemical activity as solutions of sodium borohydride but have the added advantage that products treated therewith are not contaminated with sodium ions or borate ions. Thus, alcohols can now be freed of carbonyl components without thereby being contaminated with borate; metal ions, such as silver, can be reduced to the free element; metal ions of groups IV-A to VI-A can be converted to volatile metal hydrides; and transition metal ions can be converted to the boride. The anion exchange resin is prepared by treating a strong base anion exchanger with aqueous sodium borohydride or sodium cyanoborohydride. Regeneration of the borohydride form from the borate proceeds directly with aqueous sodium borohydride.

Abstract: Salicylate esters have been found to be suitable blocking agents for polyisocyanates, enabling preparation of hydroxy terminated polybutadiene based polyurethane bound propellant grains having extended pot life. Unblocking occurs readily at normal propellant cure temperatures, allowing normal cure rates.

Abstract: Polysulfide-polyether and polysulfide-polyformal polymers having terminals inert to oxidative curing dissolve rapidly in molten elemental sulfur resulting in improved impact strength for the cooled solidified product.

Abstract: Finely divided aluminum oxide increases the burning rate, reduces the pressure exponent at high pressures and stabilizes the combustion of solid propellant compositions.

Abstract: Diesters of succinic, glutaric, adipic, and phthalic acid with hexyloxyethoxyethanol or butoxyethoxyethoxyethanol are disclosed. They are useful as plasticizers with extended temperature ranges in elastomers.

Abstract: Curable liquid polysulfide polymer based sealants containing butyl or polybutene polymers or mixtures thereof as adhesive additives. The compositions show improved adherence to glass in the presence of moisture and ultra-violet light.

Abstract: A method for safe, relatively air-pollution free disposal of pyrotechnic compositions is disclosed. High percentage recoveries of the inorganic oxidizer and metallic fuel are achieved, resulting in significant cost benefits, while using a minimum of energy.

Abstract: Finely divided cupric sulfide increases the burning rate, and reduces the pressure exponent of solid propellant compositions.

Abstract: Polysulfide polymers modified with epoxy groups are effective as adhesive additives for liquid polysulfide polymer based compositions used as sealants or bonding agents on various substrates such as glass or aluminum.

Abstract: A curable homogeneous gas-generating composition composed essentially of oxalyl dihydrazide coolant combined with: (a) a perchlorate oxidizer selected from the group consisting of ammonium perchlorate, the alkali metal perchlorates, and the alkali earth metal perchlorates, (b) a combustible fuel binder, and (c) propellant adjuvants.A process for the preparation of oxalyl dihydrazide is also disclosed.The gas-generating compositions of the present invention have greatly improved combustion characteristics and exhibit reduced flame temperatures.

Abstract: A method for improving the combustion efficiency, i.e. increasing the burning rate, of propellant, flare, and other pyrotechnic compositions is disclosed which comprises using at least some ammonium perchlorate oxidizer coated with aluminum metal in place of a mere mixture of aluminum and ammonium perchlorate. The resultant compositions have increased burning rate in comparison to mere mixtures of ammonium perchlorate and aluminum.

Abstract: The derivatives of this application are based on the reaction of perfluoroalkyl iodopropyl glycidyl ethers and their dehydroiodination products, the perfluoroalkyl allyl glycidyl ethers, with active hydrogen compounds which include alcohols, carboxylic acids, water, phenols, mercaptans, mercaptoalcohols, thiourea, and hydrogen sulfide

Abstract: A polysulfide polymer latex is blended with a urethane prepolymer to produce a sealant composition having improved physical properties. The resulting sealant composition may be employed in various sealing caulking applications.