Abstract: The present invention relates to a process for preparing polyurethane/polyurea or polyurea elastomers by spray processing or reaction injection molding a reaction mixture comprising an A-side and a B-side, wherein said A-side comprises a polyisocyanate or an isocyanato-terminated polyurethane prepolymer and wherein said B-side comprises a polyol or polyamine plus a chain extender, in order to form a polyurethane/polyurea or polyurea elastomer, said polyol having an equivalent of between about 1,000 and about 20,000, a preferred molecular weight of between about 5,000 and about 30,000 and an end group unsaturation level of no greater than 0.

Abstract: Described herein are photopolymerizable compositions comprising at least one polymerizable ethylenically unsaturated compound, and an initiating combination of an organic soluble xanthene dye compound and an organic activator compound. These compositions are useful as radiation-curable coatings, photocurable films, and photoactive films.

Abstract: Described herein is a one pot continuous improved process for preparing dinitrotoluene by reacting toluene with concentrated nitric acid.

Abstract: Described herein is a one pot continuous process for preparing dinitrotoluene by reacting toluene with concentrated nitric acid.

Abstract: The present invention relates generally to paints and paint bases, and, more specifically to a process for providing a stable gel-free dispersion of zinc pyrithione plus cuprous oxide biocide in paint. In accordance with the process of the present invention, the zinc pyrithione is purified to a purity assay of at least 98% in order to provide gellation-inhibition in the paint.

Abstract: The present invention relates to a continuous process for making an alkali metal azide or an alkaline earth metal azide which comprises the steps of: (a) reacting a first reaction mixture comprising an alkali metal nitrite or alkaline earth metal nitrite, a C1--C3 alkanol, and a high boiling acid in a first reactor to form a gaseous C1-C3 alkyl nitrite, (b) controllably feeding said gaseous C1-C3 alkyl nitrite into a second reactor and reacting in a controlled manner a second reaction mixture comprising said gaseous C1-C3 alkyl nitrite, hydrazine, and an alkali metal hydroxide or alkaline earth metal hydroxide, in the presence of an organic solvent, thereby producing an alkali metal azide or alkaline earth metal azide, and (c) removing said alkali metal azide or alkaline earth metal azide from said second reactor and replenishing said reaction mixture in said second reactor to provide a continuous, controlled process for producing said alkali metal azide or alkaline earth metal azide.

Abstract: The present invention relates to a process for removing double metal cyanide complex catalyst residue(s) from polyol(s) which comprises after polyol formation the steps of: (a) contacting the catalyst residue-containing polyol with an effective amount of an oxidant to cause said residue(s) to form insoluble residues that are insoluble in the polyol, and (b) separating the insoluble residues from the polyol. In another aspect, the present invention relates to the oxidant-free polyol produced by the above process.

Abstract: This invention relates to a method of fabricating a thermoplastic elastomer which comprises the steps of: (a) fabricating a polyol having a molecular weight of between about 2,000 and about 20,000 and having a level of end group unsaturation of no greater than 0.04 milliequivalents per gram of polyol, said polyol being fabricated in the presence of a double metal cyanide catalyst, (b) reacting said polyol with a diisocyanate to produce an isocyanate-terminated prepolymer, and (c) reacting said isocyanate-terminated prepolymer with a difunctional isocyanato-reactive chain extender in a mold or in an extruder in order to produce a soft elastomer characterized by a Shore A hardness of between about 10 and about 70. Also claimed is the elastomer produced by the above method utilizing a one-shot technique.

Abstract: This invention is directed to a detergent composition comprising the microbial lipase SD2 and dodecylbenzene sulfonate. In the detergent composition, the lipase SD2 is characterized by having (i) optimum pH for activity of about 8.+-.0.5; (ii) an optimum temperature for activity of about 30.degree. to 55.degree. C. and (iii) a molecular weight as measured by gel permeation chromatography of about 8.8.times.10.sup.4.

Abstract: The present invention relates to a process for producing an encased propellant which comprises overwrapping at least one charge of propellant with an elastomeric coating composition to produce the desired encased propellant. The process is suitably effected by molding, casting, dipping, or otherwise applying the coating composition to the charge of propellant. The process and composition of the present invention is expected to be useful in the production of encased tank ammunition, and the like.

Abstract: The present invention relates to a process for minimizing or reducing the amount of residual free hydrazine in polymer latices. The process is particularly useful in the manufacture of hydrogenated nitrile rubber which is resistant to oxidative degradation at high temperatures, as well as resistant to corrosive environments such as acid environments. Nitrile rubbers are useful in the manufacture of fan belts, seals, gaskets, and hoses in increasingly small and hot-running car engines.

Abstract: An electrostatic method is disclosed for providing multicolor imaging from a single toner bath. The toner bath is a blend of individual toners, each of which contains a color precursor different from the others. Also disclosed is a method for the double encapsulation of toner particles to produce toner particles characterized by multiple encapsulation.

Abstract: A novel lipase from a newly-discovered strain of Pseudomonas alcaligenes microorganism having (i) an optimum pH for activity of about 10.+-.0.5; (ii) an optimum temperature for activity of about 45.degree. to 55.degree. C.; (iii) an optimum pH for stability of about 7.0.+-.0.5; (iv) a molecular weight as measured by gel permeation chromotagraphy of about 8.8.times.10.sup.4 ; and (v) chemical stability for at least 30 days in the presence of the surfactants. Also claimed is a biologically pure culture of the microorganism, and a method for the production of the lipase.

Abstract: This invention is directed to a detergent composition comprising the microbial lipase SD2, dodecylbenzene sulfonate, and gelatin. In the detergent composition, the lipase SD2 is characterized by having (i) optimum pH for washing activity of about 8.+-.0.5; (ii) an optimum temperature for activity of about 30+ to 55.degree. C. and (iii) a molecular weight as measured by gel permeation chromatography of about 8.8.times.10.sup.4.

Abstract: The present invention relates to novel compounds represented by the formula: ##STR1## wherein R is an alkyl group having from about 8 to about 18 carbon atoms, and mixtures thereof, n has a value of from 1 to 6, R.sub.1 is selected from the group consisting of an alkyl group having from 1 to about 12 carbon atoms, or ##STR2## where the sum of n+m=2 to 12. These compounds possess antimicrobial activity and are useful as cleaning agents and preservatives, particularly in water-based functional fluids and surface coating compositions.

Abstract: This invention relates to an improved paint or paint base composition characterized by enhanced biocidal efficacy. The paint or paint base composition is essentially free of tin, lead, and vanadium and contains a biocide comprising pyrithione salt and a copper salt. The pyrithione salt is present in the paint in an amount of between about 5% and about 50%, and the copper salt is present in an amount of between about 5% and about 50%, the total amount of biocide being between about 10% and about 75%, based upon the total weight of the paint composition.

Abstract: This invention relates to a process for making nitrile rubber characterized by being essentially gel-free and at least about 90% saturated. The process comprising reacting an ethylenically unsaturated polymer in latex from, hydrazine, and an oxidant, followed by coagulation and filtration in order to isolate the reduced rubber. The process utilizes a reaction mixture containing a high molar ratio of hydrazine to unsaturated polymer.

Abstract: Described herein is a continuous process for preparing dinitrotoluene by reacting toluene with dilute nitric acid to produce mononitrotoluene, then reacting the mononitrotoluene with concentrated nitric acid to produce dinitrotoluene.

Abstract: A process for producing chloride ion-free 1,2,4-triazol-5-one which comprises: a) heating a mixture of hydrazodicarbonamide and formic acid to a reflux temperature for said mixture, b) refluxing said mixture at said reflux temperature for a time sufficient to cause said mixture to change its visual appearance from a cloudy mixture to a clear solution, and c) removing unreacted formic acid from said clear solution to provide the desired 1,2,4-triazol-5-one product free of chloride ion.

Abstract: A method and a kit for separating double-stranded nucleic acid molecules from a mixture containing both single-stranded and double-stranded nucleic acid molecules. The method is particularly suitable for separating hybridized from unhybridized probe nucleic acid.