Abstract: Very accurate measurements of mass transfer can be made rapidly by permitting diffusion of an agent desired to be measured into or out of a small, very precisely known volume of a microdialysis probe, then rapidly pumping or flushing (“pulsing”) the probe with a known volume of fluid as a single pulse. The diffusion and pulsing may be repeated. The method, hereinafter called pulsatile microdialysis (PMD) to distinguish it from prior art continuous flow microdialysis, is useful for measurements in a number of processes, including protein binding, adsorption to binding agents such as activated charcoal, release from microemulsion drug delivery systems, determination of drug diffusion coefficients and concentrations, and for various other purposes. The method is based on mathematical manipulation of Fick's Laws. Resulting equations were verified against experimental data using methazolamide, warfarin and benzocaine as test drugs.

Abstract: A glove bag assembly comprising a glove bag adapted to be optionally sealed horizontally to create an upper and a lower portion; a valve assembly connected at its inlet to said lower portion via a conduit and at its outlet to a waste container; and vacuum-generating means communicating with splitter valve means, whereby the amount of vacuum applied to the entire assembly can be controlled.

Abstract: A process for preparing a supported silver catalyst for the production of alkylene oxide by the vapor phase oxidation of alkylene with an oxygen-containing gas is disclosed and comprises contacting a silver-contacting support with a solution comprising a metal-containing promoter other than alkali metals or alkaline earth metals. The solution is chosen so that the metal-containing promoter has an increased affinity to the silver-containing carrier relative to its affinity to the carrier without silver. Alkene epoxidation catalysts and alkene epoxidation processes are also disclosed.

Abstract: Operative fluids containing lower glycol are contacted with semi-permeable membranes under reverse osmosis conditions to permeate lower glycol to provide a reclaimed lower glycol product. Exemplary operative fluids include antifreeze solutions, heat transfer fluids, deicers, quenchants, hydraulic fluids, lubricants, solvents and absorbents.

Abstract: Catalysts for the epoxidation of ethylene in the vapor phase comprise silver impregnated support having thereon at least one cation promoter and oxyanion promoter comprising (i) sulfate anion, (ii) fluoride anion and (iii) oxyanion of an element of Group 3b to 6b, inclusive, of the Periodic Table, wherein the amount of fluoride anion is sufficient to reduce ethylene oxide burning.

Abstract: Volatilized metal compounds retard vapor phase alkane conversion reactions in oxidative coupling processes that convert lower alkanes to higher hydrocarbons.

Abstract: Oxidative coupling of lower alkane to higher hydrocarbon is conducted using catalyst comprising barium and/or strontium component and a metal oxide combustion promoter in the presence of vapor phase halogen component. High ethylene to ethane mole ratios in the product can be obtained over extended operating periods.

Abstract: Alkali metal doped double perovskites containing manganese and at least one of cobalt, iron and nickel are useful in the oxidative coupling of alkane to higher hydrocarbons.

Abstract: Novel vinyl chloride copolymers including a hydroxyalkyl acrylate or methacrylate or allyl alcohol, an epoxy-containing vinyl monomer and an acid functionality from either certain carboxylic acid-containing monomers or a phosphorus ester moiety in selected proportions provide suitable binder resins for applications such as magnetic recording media, imparting desirable thermal stability together with enhanced dispersion and magnetic property characteristics and miscibility with elastomers employed in such media.

Abstract: Photopolymerizable compositions, based on 2-methoxytetrahydropyran and 3,4-epoxycyclohexylmethyl-3,4-epoxycyclohexane carboxylate, which can be applied as coatings on substrates and photocured at high speeds.

Abstract: Carboxylated latex resins and neutralized carboxylated water-soluble polymers are crosslinked with aliphatic or cycloaliphatic polyfunctional polycarbodiimides or mixed aliphatic-aromatic polyfunctional polycarbodiimides.

Abstract: Novel vinyl chloride copolymers including a hydroxyalkyl acrylate or metacrylate or allyl alcohol, an acid functionality from carboxylic acid-containing monomers and optionally an epoxy-containing vinyl monomer in selected proportions provide suitable binder resins for applications such as magnetic recording media, imparting enhanced dispersion and magnetic property characteristics while also having desirable rheological characteristics and, when the epoxy-containing vinyl monomer is used, desirable thermal stability.

Abstract: Waterborne, neutralized, carboxyl-bearing phenoxy resin with which is blended a relatively soft, neutral, non-carboxyl-bearing modifier resin. A coalescing solvent is preferably included in the aqueous blend.

Abstract: Described herein are compositions suitable for photocopolymerization comprising a cyclic vinyl ether containing compound and urethane acrylates. Photocurable coatings can be prepared from such composition and such coatings have markedly improved flexibility and impact resistant properties.

Abstract: Described herein are photocopolymerizable compositions comprising a cycloaliphatic epoxide an alkylene oxide derived polyol having an average molecular weight of from about 2000 to about 4500 and a photoinitiator. These compositions are particularly suited for coating paper, wood, metal, and plastic substrates.

Abstract: This invention is directed to photocopolymerizable compositions comprising an epoxide containing two or more epoxy groups, a poly (active hydrogen) organic compound, a photoinitiator and, as a reactive diluent, a substituted cycloaliphatic monoepoxide. The photocopolymerizable compositions have low viscosity and can be applied to suitable substrates by conventional methods and, after being cured to dry coating films, can have utility as automotive finishes, can finishes, appliance finishes, general metal finishes, adhesives, printing inks and the like.

Abstract: A process is provided for the preparation of the dimer, dichloro-[2,2]paracyclophane, which is useful as the starting material for the deposition of conformal parylene coatings employed, for example, in the electronics industry for the protection of various sensitive electronic components.The process avoids the normally low yields of chlorinated dimer formed by the chlorination of 2,2-paracyclophane and instead utilizes the Hofmann elimination of 2(3)-chloro-p-methylbenzyltrimethylammonium hydroxide by conducting the elimination reaction under carefully controlled conditions of reaction temperature and profile, reaction feed configuration, water concentration in the reactor and the use of a cosolvent, certain reaction promoters, or a combination thereof.

Abstract: This invention is directed to polymers (including oligomers) that contain (N-substituted carbamoyloxy)alkanoyloxyalkyl acrylates, to a process for their preparation by reacting the carbamoyloxy alkanoyloxyalkyl acrylates with other ethylenically unsaturated monomers, and to coating, ink, adhesive, and sealant compositions (including the cured coatings, inks, adhesives, and sealants) that are obtained by crosslinking the above compositions by various means. The cured compositions, which are, for example, high-quality industrial finishes, sealants or encapsulants, are made by incorporation of various conventional crosslinking agents and other normally-used formulating ingredients with the polymeric compositions of the invention.

Abstract: Described herein are compositions suitable for photocopolymerization comprising a cyclic vinyl ether containing compound and an epoxide. These compositions can be cured to give coatings with improved flexibility and impact resistant properties.

Abstract: Disclosed are surface-active polycarbodiimides containing a hydrophilic portion and a hydrophobic portion joined through the reaction of a carbodiimide group with a reactive functional group. The surface-active polycarbodiimides may be linear or branched, monodisperse or polydisperse, but preferably are of the branched, monodisperse type. The surface-active polycarbodiimides are useful as surfactants, and are particularly useful as emulsifiers in cross-linkable, carboxyl-containing resin systems, such as aqueous latexes.