Abstract: The highly chlorinated methanes, e.g., carbon tetrachloride, are improvedly dechlorinated by reacting same with hydrogen in the presence of oxygen or an oxygen-containing gas, e.g., air, and a catalytically effective amount of a metal of the copper or precious metal Groups of the Periodic Table, typically in the form of a fixed or fluidized bed thereof, and advantageously in the gaseous phase.

Abstract: Polymer bound stabilizer compounds are provided in which two or more different classes of stabilizers are chemically bound to anhydride containing polymers or copolymers. Polymeric stabilizers are prepared by the reaction of primary amino or hydrazido substituted stabilizers (i.e., antioxidants, light stabilizers, etc.) with some or all of the anhydride groups of the polymer or copolymer to form pendant stabilizer substituted imide or amic acid groups. The polymer bound stabilizers are not lost from the polymer system by volatilization, migration or extraction, even at high temperatures. The polymer bound stabilizer compounds may be used as concentrates to stabilize other polymer systems.

Abstract: A floor finish remover composition containing a solvent, water, and an organosilicon complex formed from a silicate such as sodium metasilicate and a linear, 6-10 carbon, organic compound such as sodium n-octane sulfonate.

Abstract: Extracted vegetable pulps are bleached to a high degree of whiteness, thus rendering them more attractive as food supplements, by (a) treating such pulp in an acid medium at a pH of up to 2.5 and for a period of time of at least 10 minutes, (b) next washing the pulp thus treated to an efficiency of at least 80%, and (c) then reacting the washed pulp with an aqueous alkaline solution of hydrogen peroxide, in the presence of an H.sub.2 O.sub.2 stabilizer.

Abstract: Partial or total separation of a mixture of vinylidene chloride and 1,1-dichloro-1-fluoroethane by liquid-liquid extraction with solvents having a Hansen solubility parameter of about 30.8-32.0, such as ethanolamine.

Abstract: Melt processable copolymers of vinylidene fluoride and hexafluoropropylene, containing from about 1% to about 20% hexafluoropropylene by weight, are prepared by emulsion polymerization of vinylidene fluoride and hexafluoropropylene in a stirred aqueous reaction medium. The reaction medium is formed by charging to a heated reactor, water, vinylidene fluoride, an initiator to start the polymerization, and a water-soluble surfactant capable of emulsifying both the initiator and the reaction mass during polymerization. Additional amounts of vinylidene fluoride and initiator are fed to the reaction medium to continue polymerization of the vinylidene fluoride monomer until from about 50% to about 90% of the total weight of the vinylidene fluoride monomer utilized in the process has been added to the reaction medium.

Abstract: A process for separating emulsions of alkanesulfonyl chloride in aqueous hydrochloric acid comprises passing the emulsion through a carbon bed, a graphite bed, a layer of alkanesulfonyl chloride or a combination thereof; and allowing the emulsion to enter a settling vessel.

Abstract: A process for removing sulfur from an organic sulfide containing three or more chemically bound sulfur atoms is disclosed wherein said sulfide is contacted with a defined catalyst at elevated temperature to increase the disproportionation rate and the corresponding sulfide of lower sulfur rank is continuously removed from the reaction zone.

Abstract: A process for modifying the surface region of a polymer article by incorporating one or more ingredients therein. Such ingredients may be ultraviolet light stabilizers, antioxidants, anti-static agents, pigments and the like. The polymer article, e.g. a sheet of polyvinyl chloride, is immersed in a liquid (e.g. water) and the immersed article is contacted with a solution of the ingredient in a solvent. The liquid must be one which is non-aggressive towards the article and must also be immiscible with the solvent.

Abstract: An oligomer of the formula ##STR1## in which R.sub.1 =H or CH.sub.3 ;R.sub.2 =C.sub.t H.sub.2t in whcih 0.ltoreq.t.ltoreq.18;Z is selected from C.sub.2 H.sub.4, C2H2 and ##STR2## in which 2.ltoreq.d.ltoreq.16; m is an integer such that 1.ltoreq.m.ltoreq.3;R.sub.3 =C.sub.t'H.sub.2t'+1 in which t'.gtoreq.1 and 8.ltoreq.t+t'+2m.ltoreq.22n and n' are identical or different integers, such that 2.ltoreq.n+n'.ltoreq.20;b is an integer equal to 0 or 1; anda is an integer ranging from 2 to 500.The invention also comprises the method of making the oligomer and thermoplastic films containing the same as well as the resultant thermoplastic films.

Abstract: A process for converting carbon disulfide (CS.sub.2) to hydrogen sulfide (H.sub.2 S) in mixtures of H.sub.2 S and CS.sub.2 is provided. The H.sub.2 S/CS.sub.2 mixture is combined with water to form a hydrolysis feed mixture. The hydrolysis feed mixture is passed through a hydrolysis reactor containing e.g., an alumina-based catalyst, wherein a substantial portion of the CS.sub.2 is converted to additional H.sub.2 S. A vapor product comprising H.sub.2 S, CO.sub.2, unreacted H.sub.2 O, unconverted CS.sub.2 and sulfur is formed by the hydrolysis reaction. The vapor product is cooled to form a H.sub.2 S/CO.sub.2 vapor phase and a sour water condensate phase. The H.sub.2 S/CO.sub.2 vapor phase is separated from the sour water condensate phase and subsequently recovered. The sour water condensate phase, which contains small amounts of solid sulfur particles, is optionally then combined with additional CS.sub.2 and decanted to form a sulfur-free sour water layer and a CS.sub.2 layer containing dissolved sulfur.

Abstract: A structure for a piezo film impact detector eliminates or minimizes false outputs due to pyroelectric effects. The detector structure has particular application to outdoor and underground use.

Abstract: Preparation of bleached and dried vegetable pulps, wherein the bleaching by means of hydrogen peroxide is carried out simultaneously by the vaporization of the water of the pulp by means of a dry gaseous atmosphere circulating in contact with said pulp.

Abstract: Corrosion resistance of metals such as aluminum is promoted by contact with a formulation containing an aqueous emulsion of an acrylic polymer; a blocked water-soluble zirconium catalyst; a volatile organic solvent/water mixture; and a corrosion additive component.

Abstract: Flame retardant compositions are provided containing at least one ester of a polyhaloaromatic acid and at least one polyolefin resin. The compositions may also contain one or more brominated and/or chlorinated compounds to provide additional flame retardancy, and other resins or engineering thermoplastics may be blended with the polyolefin. In addition to providing flame retardancy, the polyhaloaromatic acid esters are effective as processing and compatibilizing aids for the resin, and may also function as tackifiers, mold release agents, plastisole, adhesives, plasticizers, polymer additives, and aids in preventing melt fracture.

Abstract: In the process for manufacturing thermoplastic polymer articles reinforced with long continuous fibers by pultrusion, including impregnating tufts of fibers with thermoplastic resin, circulating an assemblage of said impregnated tufts in a heat assembly so as to melt the resin, and then hot shaping the article in an appropriate die to give it essentially its final shape before passing it through a second cooling die, the improvement including compressing the assemblage of impregnated tufts in the heated assembly consisting essentially of a flat die having an inlet zone and an exit zone, the inlet being wide enough to allow the initial volume of the impregnated tufts to pass through and a horizontal gap adapted to be varied in thickness, and allowing the emerging assembly of impregnated tufts to be brought to the shape of a sheet of minmimium thickness before shaping, and the flat die and rigid polyvinyl chloride article prepared by the process.

Abstract: A hardenable, fluorinated copolymer of fluorinated monomers and a hydroxylated and/or epoxidized allyl ether, paints and varnishes comprising such copolymers, and the process of making such copolymer.

Abstract: Improved apparatus for coating glass containers provides a coating on the body for improved resistance to impact breakage and abrasion, while coating of threads or lugs at the open tops of the containers is limited to about one-tenth, or less, of the coating on the surfaces of the body, which surfaces are exposed to contact with other containers during handling. The apparatus provides a laminar flow of fluid which is free of coating-precursor chemical over the threads or lugs in a manner which minimizes turbulence and intermixing with the coating stream.

Abstract: The invention relates to an azeotrope with a minimum boiling point, capable of being employed as a refrigerating fluid replacing trifluorobromomethane (Halon 1301) in industrial refrigeration systems at very low temperature with single-stage compression.The azeotrope according to the invention is a mixture of 1,1,1-trifluoroethane (HFA 143a) and of propane (R290). At the normal boiling point (approximately -53.4.degree. C. at 1.013 bars), its 1,1,1-trifluoroethane content is approximately 70.6 mass % and that of propane 29.4 %.This azeotrope can also be employed as an aerosol propellant or as a blowing agent for plastic foams.

Abstract: The present invention is directed to a composition comprising a polymeric engineering resin selected from the group consisting of polycarbonates, polyarylethers, polyamides, polyesters, polyacetals, polyaryl sulfides, cellulose esters and styrene copolymers; and an amount of an organic sulfide antioxidant sufficient to stabilize the resin against oxidative or thermal degradation during processing and use, the organic sulfide antioxidant being represented by Formula I, II, or III: ##STR1## wherein m, n, R, R.sup.1, R.sup.2, R.sup.3, R.sup.5, R.sup.6, R.sup.7 and R.sup.8 are as set forth in the Summary of the Invention.