Abstract: This invention relates to o-tolidines which have a tert-butyl substituent ortho to an amine group. These compositions are represented by the formula: ##STR1## where R.sub.1 =i-propyl, or t-butyl, and where R.sub.2 =hydrogen, i-propyl, or t-butyl.The compositions are useful in the preparation of polyepoxide resins as well as polyurethanes, polyamides and polyimides.

Abstract: An oxygen selective adsorbent and a method for making an oxygen selective adsorbent wherein a porous carbon substrate such as a carbon molecular sieve, activated carbon, carbon black, coal, or petroleum coke, is impregnated with a solution of an acidic species and the impregnated substrate is dried. The oxygen selective adsorbent can be used in a pressure swing adsorption process for the separation of oxygen from nitrogen, for example, in air.

Abstract: This invention relates to a method for forming an aqueous polymeric dispersion incorporating a wax. To form the aqueous dispersion, a polymer is formed by polymerizing at least one ethylenically unsaturated monomer under conditions for forming a polymer suspended in an aqueous medium in the presence of said wax. The polymerization of the monomer in the presence of a wax in finely divided form permits the formation of a stable dispersion having excellent properties. The surfactant system is a multiple system consisting of a nonionic and/or anionic surfactant and/or an alkali metal salt of a fatty acid ester.

Abstract: This invention relates to improved polyepoxide resins having enhanced physical and elastic properties. The polyepoxide resins comprise a polyepoxide resin based on a polyglycidyl ether of a phenolic-type compound and an amine curing agent. The improvement in the polyepoxide resin formulation comprises incorporating an aliphatic, aliphatic ether or ester component having monofunctional reactivity with an amine hydrogen, an amine curative having from 3 to 10, and preferably 3 to 5 epoxide reactive hydrogen atoms into the epoxy resin, and a diglycidyl ether of a polyalkyleneoxide. The presence of the monofunctional and aliphatic amine reactive component along with the diglycidyl ether of a polyalkyleneoxide results in an epoxy resin having enhanced properties.

Abstract: This invention relates to improved polyepoxide resins having enhanced physical and elastic properties. The polyepoxide resins comprise a polyepoxide resin based on a polyglycidyl ether of a phenolic-type compound and an acrylate-terminated urethane prepolymer. The improvement in the polyepoxide resin formulation comprises incorporating a polymethylated amine curative having two secondary amine hydrogens represented by the formula: ##STR1## wherein R is alkylene or polyalkylene polyamine having from 2 to 20 carbon atoms. The presence of the aliphatic amine reactive component along with the acrylate-terminated urethane prepolymer results in an epoxy resin having enhanced properties.

Abstract: The present invention discloses an improved process for producing plastic containers with excellent resistance to permeation by solvents such as hydrocarbons, hydrocarbon fuels, and hydrocarbon fuels with organic additives including lower alkanols and ethers consistently and reliably. The process is related to a multi-step treatment of plastic containers in a controlled manner with fluorine containing gases while blow molding them. In the process of the present invention, a parison is formed from a pre-heated thermoplastic material, expanded within a closed mold by means of an inflating gas for conforming the parison to the shape of the mold, and subjected to multiple fluorination treatment steps to effect fluorination of the interior surface of the parison. In the first step of the multi-step fluorination treatment the parison is pressurized with a reactive gas containing from about 0.05 to about 0.

Abstract: A solid state process for modifying polyvinyl alcohol using a Michael-type addition wherein dry polyvinyl alcohol powder is sprayed with a solution of a monomer capable of Michael-type addition in an amount sufficient to swell the polyvinyl alcohol or maintain its swollen state, but not dissolve or form a slurry of the polyvinyl alcohol. The swollen polyvinyl alcohol is sprayed with a catalyst and the temperature is raised to initiate the reaction between the polyvinyl alcohol and the monomer.

Abstract: A two-component water-dispersible coating composition based on a blend of a water compatible polyamine-epoxy adduct and a resin compatible polyamine-epoxy adduct, and a polyepoxide resin. The water compatible polyamine-epoxy adduct is formed by reacting a polyamine having primary amine groups with a mixture of a monoepoxide and polyepoxide in which the amounts of monoepoxide and polyepoxide are such that the monoepoxide reacts with 10 to 50% of the primary amine groups and the polyepoxide reacts with 5 to 65% of the remaining primary amine groups. The resin compatible polyamine-epoxy adduct is formed by reacting a polyamine having primary amine groups with a monoepoxide or a polyepoxide in an amount which provides from about 0.4 to 1 equivalents epoxide per primary amine group. The amount of polyepoxide resin is such that there is from about 0.5 to 1.5 equivalents epoxide per active hydrogen equivalent.

Abstract: Graft copolymers of .epsilon.-caprolactam are made by a process in which .epsilon.-caprolactam is polymerized in the presence of a copolymer of an aliphatic acrylate and an ethylenically unsaturated carboxylic acid, such as n-butylacrylate and acrylic acid. Such grafted polymers which have nylon-6 side chains grafted onto the acrylate polymer backbone are useful as hot melt adhesives. In the process for preparing these polymers, the backbone polymer is formed initially by solution polymerization at a moderate temperature and the .epsilon.-caprolactam is then added and the temperature increased in the presence of an acidic catalyst. .epsilon.-Caprolactam can be used as the solvent in the polymerization of the backbone polymer.

Abstract: A modified polyvinyl alcohol and a solid state process for producing modified polyvinyl alcohol wherein polyvinyl alcohol powder is sprayed with a sufficient amount of a solution of a polymerizable monomer to swell the polyvinyl alcohol powder but not dissolve it or form a slurry. The swollen polyvinyl alcohol powder is sprayed with a free radical source (an initiator) and the temperature is raised to initiate a reaction between polyvinyl alcohol and the polymerizable monomer.

Abstract: This invention pertains to alkyl substituted bi(cyclohexylamine) and derivatives having a high trans, trans-isomer distribution. This isomer distribution represents a thermodynamic mixture of the isomers and provides for extended pot life and extended thermal properties in epoxy resins which are not seen with the kinetic isomer mixture. The bridged cyclohexylamine and derivatives are represented by the formula: ##STR1## wherein; R.sup.1 is hydrogen or C.sub.1-4 alkyl;R.sup.2 is C.sub.1-4 alkyl; andR.sup.3 is hydrogen or C.sub.1-4 alkylThe invention also relates to epoxy resins cured with the bridged bi(cyclohexylamines).

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: This invention pertains to alkyl substituted bi(cyclohexylamine) and derivatives having a high trans,trans-isomer distribution. This isomer distribution represents a thermodynamic mixture of the isomers and provides for extended pot life and extended thermal properties in epoxy resins which are not seen with the kinetic isomer mixture. The bridged cyclohexylamine and derivatives are represented by the formula: ##STR1## wherein; R.sup.1 is hydrogen or C.sub.1-4 alkyl;R.sup.2 is C.sub.1-4 alkyl; andR.sup.3 is hydrogen or C.sub.1-4 alkylThe invention also relates to epoxy resins cured with the bridged bi(cyclohexylamines).

Abstract: Volatile .beta.-diketonate alkaline earth metal complexes useful in chemical vapor deposition (CVD) operations are formed using a cyclic ligand, such as a macrocyclic crown ether, to increase the degree of coordination and shielding around the individual metal ions in the diketonate structure. The resultant monomeric complexes readily volatize to give a chemically stable vapor.

Abstract: Nitrogen is economically recovered from the flue gas evolved in a hydrocarbon steam reforming furnace by hydrogenation of free oxygen therein and removal of carbon dioxide and other minor impurities from the flue gas by pressure swing adsorption with recovery of high purity nitrogen is unsorbed effluent. The process is utilized to highest advantage in the production of ammonia syngas wherein natural gas or other hydrocarbon feed is subjected to steam reforming in a fuel-fired furnace. The nitrogen obtained by purification of the flue gas is combined with the purified hydrogen separated from the reformate providing the syngas for conversion to ammonia. In a preferred embodiment, the steam reforming is carried out in two stages, the first stage being performed in a conventional fuel-fired steam reforming furnace to which a major portion of the fresh hydrocarbon feed is charged.