Abstract: This invention is related to the preparation of hydrofluorocarbons (HFCs). Specifically, it relates to the fluorination of a compound of the formula:CF.sub.y Cl.sub.3-y CH.sub.2 CHF.sub.w Cl.sub.2-wwherein w=0 or 1, and y=0-3, with hydrogen fluoride in the presence of a fluorination catalyst under conditions sufficient to produce a compound of the formula CF.sub.3 CH.sub.2 CF.sub.2 H.CF.sub.3 CH.sub.2 CF.sub.2 H or HFC 245fa may be used as a blowing agent, a propellant, and a heat transfer agent.

Abstract: This invention relates to a process for forming metal or non-metal carbide fiber from the corresponding metal or non-metal containing material such as a silicon sol or mixtures thereof and silicon, silicon carbide or silicon oxide, or mixtures of silicon carbide and silicon or silicon oxide.

Abstract: A miscible blend composition having high T.sub.g and good chemical resistance comprising, based on the total weight of the composition, from about 30 to about 90 weight % of a polyalkylene terephthalate, from about 70 to about 10 weight % of a polyarylate polymer, and an effective amount of an ester-interchange inhibitor.

Abstract: A polymeric film having superior oxygen barrier properties comprising at least three layers, two layers formed of an aliphatic polyamide such as poly(caprolactam) sandwiching a layer formed of an aliphatic/aromatic polyamide such as poly(m-xylylene adipamide) or a blend of an aliphatic/aromatic polyamide such as poly(m-xylylene adipamide) with an ethylene vinyl alcohol copolymer.

Abstract: A process for making a crosslinked, highly porous body derived from a water-soluble, hydrogel polymer, wherein the porous body is characterized in that it has an open-celled 3-dimensional lattice structure, a density of less than about 1.0 g/cm.sup.3, a surface area of equal to or greater than about 30 m.sup.2 /g, and a compression strength of equal to or less than about 75% yield at 300 psi.

Abstract: There is provided a crosslinked, highly porous chitosan body, wherein the porous body is characterized in that it has an open-celled 3-dimensional lattice structure, a density of less than about 0.75 g/cm.sup.3, a surface area of equal to or greater than about 170 m.sup.2 /g, and a compression strength of equal to or less than about 75% yield at 300 psi.

Abstract: Stable aqueous coemulsions of oxidized polyethylene with amino functional silicone fluids which includes at least one constituent selected from the group consisting of; ethoxylated aliphatic amines, ethoxylated nonylphenols, ethoxylated primary alcohols, ethoxylated secondary alcohols or other nonionic emulsifiers are taught, as well as processes for making the same. The coemulsions may also comprise further constituents, including but not limited to fatty acids, ammonium hydroxide, salts and water. The coemulsions find use in conjunction with textile processing and paper processing.

Abstract: This invention relates to a process of forming a composite material comprising a polymer matrix comprising a polymeric material and dispersed particles selected from the group consisting of platelet or fibrillar particles having average thicknesses of less than 50 and a maximum thickness of less than about 100 and fibrils having an average diameter equal to or less than about 200 and a maximum diameter of about 200 and having an organo metallic residue species covalently to said particles organo metallic species having a moiety which is compatible with a polymer species in the polymer matrix, or said species having a moiety which is covalently bonded to a polymer species in the polymer matrix or a combination thereof, said dispersed particles being present in an amount less than about 60% by weight of the composite material and to the composite material formed by such process

Abstract: There is provided in accordance with the present invention polyphenylene ether/polyalkyleneterephthalamide compositions of high dimensional stabilities that are suitable for high temeprature applications comprising from about 20 to about 70 weight % of a functionalized polyphenylene ether; from about 20 to about 70 weight % of a polyalkyleneterephthalamide, wherein the polyalkyleneterephthalamide is derived from terephthalic acid and an .alpha.,.omega.-alkanediamine having 10 to 14 methylene groups; and from about 0 to about 20 weight % of a functionalized elastomeric polymer, wherein the blend absorbs less than 2 wt % of moisture and has a dimensional growth in water of less than 0.5%.

Abstract: A crosslinked, highly porous body derived from a water-soluble, hydrogel polymer, wherein the porous body is characterized in that it has an open-celled 3-dimensional lattice structure, a density of less than about 1.0 g/cm.sup.3 a surface area of equal to or greater than about 30 m.sup.2 /g, a compression strength of equal to or less than about 10% yield at 10 psi, and an average pore diameter of less than about 1000 Angstroms.When the hydrogel polymer used is guar gum, the resulting product is particularly useful for thermal insulation applications.

Abstract: This invention relates to a process of forming a polyamide composition having increased crystallization rate which comprises the steps of reducing the oligomeric polyamide content of said composition to less than 8% by weight of the composition, preferably with prior melt shearing, use of 1-2% nucleating filler e.g. talc and a mold release agent.

Abstract: A crosslinked, highly porous body derived from a water-soluble, hydrogel polymer, wherein the porous body is characterized in that it has an open-celled 3-dimensional lattice structure, a density of less than about 1.0 g/cm.sup.3, a surface area of equal to or greater than about 30 m.sup.2 /g, and a compression strength of equal to or less than about 75% yield at 300 psi.

Abstract: This invention relates to a branched fractal three dimensional porous polymer species which comprises rigid aromatic recurring units having electrophilic or nucleophilic reactive moieties on the exterior thereof. Another aspect of this invention relates to a star polymer comprising a polymeric core formed of the fractal polymers (FPS) of this invention having linear polymeric moieties grafted to the exterior thereof by way of residues formed by reaction between the reactive moieties on the exterior of the fractal polymer (FP) and complimentary reactive moieties on a linear polymer. Yet another aspect of this invention relates to polymeric composites comprising a polymer matrix having dispersed therein the star polymers of this invention.

Abstract: The present invention is directed to a process of preparing multicyanate esters by: a) reacting an adduct of a tertiary amine and a phenol-formaldehyde oligomer or derivative thereof with cyanogen halide in a solvent reaction medium under conditions to form a reaction product stream containing at least one of the following compounds selected from the group consisting of tertiary amine-hydrohalide salt, solvent, and impurities, and, based upon the total weight of the reaction product stream excluding the weight of said tertiary amine-hydrohalide salt, from about 10 percent to about 40 percent of a multicyanate ester; b) recycling a portion of said reaction product stream into the mixture of step a; and c) separating and recovering said solvent and tertiary amine from said reaction product stream.The multicyanate ester products produced according to the present invention are useful as bonding agents in friction materials, molding materials, coatings, and adhesives.

Abstract: This invention relates to polymeric interpenetrating blends comprising a polymer matrix having dispersed therein a branched fractal three dimensional polymer species which comprises rigid aromatic recurring units linked by electrophilic or nucleophilic reactive moieties or derivatives thereof.

Abstract: Process for the production of PCTFE homopolymer and/or copolymer resins by the use of an aqueous suspension system incorporating a redox initiator system which comprises t-butyl hydroperoxide and sodium metabisulfite to initiate the polymerization or copolymerization process. The process parameters may be controlled to provide a PCTFE homopolymer or copolymer resin having a desired target range of molecular weights. The process provides stable PCTFE polymer suspensions which exhibit a low tendency to coagulate and further exhibit good wettability of the homopolymer and copolymer particles, notably in the absence of soaps.

Abstract: Compositions comprising polyalkylene terephthalate, polyethylene and a compatibilizer copolymer of a C.sub.2 -C.sub.10 alpha-olefin and a glycidyl or isocyanate group-containing functional compound, wherein the functional compound comprises about 0.4 to about 50 weight percent of the compatibilizer copolymer, provide improved impact properties and heat resistance. The compositions feature improved compatibility of polyalkylene terephthalate and polyethylene, and are useful in forming a wide variety of articles therefrom.

Abstract: A process for forming a metal or non-metal carbide fiber comprising the steps of stabilizing a fiber comprising a carbon forming polymer and a metal or non-metal oxide or a mixture of more than 50% by weight of said oxide and a metal or non-metal to form a stabilized fiber; carbonizing the stabilized fiber to form a fiber comprising carbon and a metal or non-metal oxide or a mixture of said oxide and a metal or non-metal; reacting the carbon and metal or non-metal oxide or mixture of said oxide and metal or non-metal to form a fiber comprising a metal or non-metal carbide; and sintering the fiber comprising said metal or non-metal carbide to form a fiber having a density of greater than about 70% of the theoretical density of said metal or non-metal carbide.

Abstract: Photoinitiators having at least one terminal fluoroalkyl moiety are useful for photopolymerizing and photocuring fluorinated as well as non-fluorinated monomers, especially fluorinated acrylic monomers.

Abstract: Article comprising coemulsions of oxidized polyethylene with amino functional silicone fluids which includes at least one constituent selected from the group consisting of; ethoxylated aliphatic amines, ethoxylated nonylphenols, ethoxylated primary alcohols, ethoxylated secondary alcohols or other nonionic emulsifiers are taught, as well as processes for making the same. The coemulsions may also comprise further constituents, including but not limited to fatty acids, ammonium hydroxide, salts and water. Processes for the production of the coemulsion and articles comprising the same are also disclosed.