Abstract: A poly(vinyl chloride) product is provided containing as a permanent plasticizer, a copolymer of vinyl acetate and ethylene which is copolymerized in the presence of porous particles of the PVC. The copolymerization is carried out in either suspension or emulsion and under conditions which provide a copolymer containing 60 to 85 wt % vinyl acetate in amounts from about 20 to 60 wt % of the vinyl acetate/ethylene copolymer in the final composition. A free flowing powder is formed which can be used for PVC compounding operations. If over 60 up to 80 wt % of the composition contains the copolymer, the product is a reinforced VAE dispersion.

Abstract: This invention relates to an improved process for the catalytic hydrogenation of methylene bridged polyphenylamines using rhodium as th e catalyst to produce the methylene bridged polycyclohexylamine counterparts. The improvement for hydrogenating crude methylene bridged polyphenylamines containing polyphenylamine oligomers and trace amounts of impurities, such as the formamide of the methylene bridged polyphenylamines, comprises contacting the crude polyphenylamine feed with a hydrogenation catalyst, other than rhodium, and one which is not a catalyst poison to rhodium, under conditions sufficient to at least partially hydrogenate the polyphenylamine mixture and then effecting hydrogenation of the methylene bridged polyphenylamine to the polycyclohexylamine counterpart in the presence of a rhodium catalyst.

Abstract: A method is disclosed for nuclear magnetic resonance spectroscopy wherein the improvement is the use of perfluoro 15-crown-5 ether which has 20 magnetically similar fluorine providing a superior signal to noise ratio with resultant enhanced diagnostic resolution.

Abstract: A method and apparatus for fine grinding materials normally difficult to grind at ambient temperature, e.g. plastic and elastomeric materials in a fluid classification type impact mill utilizing liquid cryogen to pre-cool the material to be ground, to cool the material and the mill during grinding and to recycle vaporized cryogen from the mill back into the mill as the medium for conveying material to be ground into the mill.

Abstract: A method for preparing a polyurethane foam which comprises reacting an organic polyisocyanate and a polyol in the presence of a blowing agent, a cell stabilizer and a catalyst composition consisting essentially of at least one compound of the following formula: ##STR1## where R is hydrogen, C.sub.1 -C.sub.8 alkyl, C.sub.6 -C.sub.10 aryl or C.sub.7 -C.sub.10 aralkyl, and n is 0-3. The preferred catalyst consists essentially of the compound when n is 0, namely 3-quinuclidinol.

Abstract: Vinyl acetate and an N-vinyl formamide are copolymerized to yield poly(vinyl acetate)-co-poly(N-vinyl formamide) which is base hydrolyzed to poly(vinyl alcohol)-co-poly(N-vinyl formamide). Two phase hydrolysis of particles of poly(vinyl alcohol)-co-poly(N-vinyl formamide) as a slurry in methanol yields particles of poly(vinyl alcohol)-co-poly(vinylamine).Provided is a copolymer of the following general formula ##STR1## where m is 0 to 15 mole %,n is 50 to 99 mole %, x is 0 to 30 mole %, and y is 1 to 50 mole %.

Abstract: Volatile liquid or low melting solid organometallic copper complexes are provided which are capable of selectively depositing a copper film onto metallic or other electrically conducting portions of a substrate surface under CVD conditions. These organometallic copper complexes are represented by the structural formula: ##STR1## wherein R.sup.1 and R.sup.3 are each independently C.sub.1 -C.sub.8 perfluoroalkyl, R.sup.2 is H, F or C.sub.1 -C.sub.8 perfluoroalkyl, R.sup.4 is C.sub.1 -C.sub.8 alkyl, phenyl, or Si(R.sup.5).sub.3, and each R.sup.5 is independently C.sub.1 -C.sub.8 alkyl or phenyl. A process for depositing copper films using these organometallic copper complexes is also provided.

Abstract: Polyvinylaminals, optionally as the formed copolymer with polyvinylhemiaminals and polyvinylacetals are useful as separating agents and are provided by reacting a poly(vinylamine) or a copolymer containing vinyl alcohol and vinylamine units with a monoaldehyde. The aldehyde, such as butyraldehyde, can be introduced into the polymer aminalization as a liquid or gas, generally in a proportion of about 0.02 to 0.5 mol per mol of alcohol and amine units in the polymer chain. These polymers, especially as the cationic salt, perform very well in the flocculation, settling, clarification and dewatering of wastewater.

Abstract: An aqueous vinyl acetate/N-methylolacrylate copolymer emulsion for RF curable Type I wood adhesive compositions prepared by the polymerization of vinyl acetate and N-methylolacrylamide in the presence of 1 to 5 wt% tetramethylol glycoluril and a stabilizing system consisting essentially of 3 to 5 wt% polyvinyl alcohol, the weight percentages being based upon vinyl acetate monomer.

Abstract: This invention relates to an improved process for the formation of N-(l-alkoxyalkyl)amides with coproduction of alkylidene bisamides. The N-(l-alkoxyalkyl)formamides of this invention are prepared by reacting formamide with an acetal or hemiacetal carboxylate ester represented by the formulas below in the presence of a solid acid ion exchange resin wherein the acid groups have been neutralized with an amine compound having a pKa (as the protonated amine in water) from about 4 to 9. The hemiacetal ester is represented by formula I and the acetal is represented by formula II. ##STR1## In the above formulas, R is C.sub.1 -C.sub.8 alkyl, aralkyl or aryl; R.sub.1 and R.sub.2 are C.sub.1 -C.sub.8 alkyl, or aryl; and R.sub.3 is secondary or tertiary alkyl having from 3-8 carbon atoms.

Abstract: Vinyl acetate/ethylene (VAE) copolymer emulsions having extended shelf life which are particularly suited for use as binders of nonwoven substrates. The copolymer emulsions are prepared by incorporating 1 to 45 wt % tetramethylol glycoluril, based on the amount of vinyl acetate in the copolymer, into an aqueous dispersion of a copolymer consisting essentially of 60 to 94 wt % vinyl acetate, 5 to 30 wt % ethylene and 1 to 10 wt % of a crosslinkable comonomer. Suitable crosslinking monomers include N-acrylamidoglycolic acid and N-methylol acrylamide. Nonwoven products formed by depositing the emulsion onto a nonwoven substrate exhibit significantly improved resistance to organic solvents.

Abstract: Methanol is produced from synthesis gas comprising hydrogen, carbon monoxide, and carbon dioxide in a two-stage liquid phase reactor system. Each reactor is operated in an optimum temperature range to maximize methanol productivity, and once-through product conversion of up to 9.1 moles methanol per 100 moles of synthesis gas can be achieved with reasonable catalyst utilization. Overall catalyst utilization is increased by countercurrent catalyst transfer. In an alternate mode of operation, the liquid phase reactor system is integrated with a coal gasification combined cycle (CGCC) power generation process wherein the unreacted synthesis gas is used as fuel in a gas turbine-driven electric power generator. Operation of each liquid phase reactor in the optimum temperature range maximizes the available heat of reaction which is recovered as steam; the steam is utilized in the gas turbine combustor or the CGCC steam turbine.

Abstract: A hollow fiber separation module is provided having a single, elongated pressurizable shell and containing multiple separation stages by multiple sections of hollow fiber bundles contained within the shell, with the ends of each bundle section potted within a single tubesheet at each end of the elongated shell. The fibers within each section are aligned so that the permeate within the fiber bores passes along paths traveling generally from one tubesheet to the other and one or more impermeable barriers are provided within the shell to isolate each section and control the passage of feed gas along the shell side of each fiber bundle section in a flow path countercurrent to the passage of permeate in the bores of the fibers.

Abstract: Preparation of a polyurethane and/or polyisocyanurate product by the reaction of a composition containing an organic polyisocyanate, an active hydrogen containing compound and water as a blowing agent using an effective amount of a molecular sieve containing sorbed amine catalyst and/or crosslinker.

Abstract: An amine-boron composition for catalyzing the urethane reaction, particularly in preparing a polyurethane foam, consisting essentially of the addition product of a tertiary amine and a boron compound of the formula R.sub.n B(OH).sub.3-n wheren=0 or 1, andR=C.sub.1 -C.sub.8 alkyl, C.sub.5 -C.sub.8 cycloalkyl or C.sub.6 -C.sub.10 aryl.Preferred catalysts are prepared by mixing triethylenediamine with boric acid.

Abstract: This invention relates to a process for separating methoxyisopropylamine and particularly to an improvement in the process for the recovery of methoxyisopropylamine from the reaction of methoxyisopropanol with ammonia under amination conditions. In this process water is produced as a byproduct and in the separation process an azeotrope is formed which comprises about 14% water and 86% methoxyisopropylamine at atmospheric pressure. The process for enhancing separation of the azeotrope comprises contacting the azeotrope of methoxyisopropylamine and water with diisopropylamine in sufficient amount to form the azeotrope of water and diisopropylamine and separating the azeotrope from the other materials in a distillation column. The overheads in this column is charged to a decanter where water is removed as a bottoms phase and the diisopropylamine as the upper phase and returned as reflux to the distillation volumn.

Abstract: A process is provided for extracting high purity oxygen from a gas generator turbine exhaust stream by passing the turbine exhaust over the feed side of solid electrolyte membrane selective to the permeation of oxygen over other components of the exhaust stream to separate the oxygen from the exhaust stream, and removing the oxygen product stream from the permeate side of the membrane. The reject exhaust stream is then passed through a power generating turbine to recover net power.

Abstract: The present invention is directed to a process for adsorptive separation of carbon monoxide or olefins from gas mixtures using adsorbents, which comprise cuprous compounds dispersed on amorphous oxide or carbon macroporous supports. The compositions are prepared by impregnating cupric compounds on, preferably pretreated, supports with the aid of an aqueous solution of an ammonium salt of a di- or polycarboxylic acid dispersant, such as ammonium citrate, followed by reduction of the cupric compound to the corresponding cuprous compound. The reduction can be performed either by the use of elevated temperature or by the use of a reducing gas preferably carbon monoxide at relatively low temperatures up to 150.degree. C. Methods of synthesis are also disclosed.

Abstract: This invention pertains to alkyl substituted difunctional cyclohexylisocyanates having an isomer distribution. The isocyanates are represented by the formulas: ##STR1## wherein; R.sup.1 is C.sub.1-4 alkyl; R.sup.2 is C.sub.1-4 alkyl andn is 0 or 2.The invention also relates to polyurethane and polyurethane/urea resins prepared using the alkyl substituted difunctional cyclohexylisocyanates as at least a portion of the polyisocyanate used in forming the polyurethane.

Abstract: Increased cooling rate of an article heated to an elevated temperature is achieved by flowing an inert gas mixture of helium and another inert gas over the article under conditions of turbulent flow.