Abstract: A method for preparing particles comprising a material suitable for catalysing oxygen reduction or hydrogen oxidation, the particles being grafted by grafts consisting of at least one specific polymer comprising at least one repeating styrene unit bearing at least one proton-conducting group.

Abstract: This invention provides an efficient method for synthesizing trithiocarbonate RAFT agents, RSC(S)SR?, that can be used in the living polymerization of methacrylates and other olefinic monomers. This invention also provides an efficient method of synthesizing bis(alkylsulfanylthiocarbonyl) disulfides that are useful as intermediates in the synthesis of trithiocarbonate RAFT agents.

Abstract: Carboxylate terminated thiocarbonates are reacted with a polyfunctional alcohol to form a hydroxyl-terminated thiocarbonate compound.

Abstract: Thiocarbonate compounds which, in one embodiment, are utilized as a rheology modifier or associative thickener. The thiocarbonate compounds thicken or increase the viscosity of a composition, preferably an aqueous composition when used in an effective amount. In one preferred embodiment, the thiocarbonate compounds include at least one hydrophilic group containing repeat unit such as derived from acrylic acid, and at least one hydrophobic group to enhance association with other compounds and thus increase viscosity of a composition. Aqueous composition comprising a latex and thiocarbonate associative thickeners are described.

Abstract: "Esters" are synthesized by reacting a nucleophile with a propargyl xanthate advantageously having the formula (I):R.sub.3 --C.tbd.C--CR.sub.1 R.sub.2 --S--CS--Y--R (I)in the presence of at least one acid, Bronsted or otherwise, and at a temperature ranging from 0.degree. to 300.degree. C.; the subject reaction is particularly applicable to a wide variety of chiral organic syntheses.

Abstract: Oligomeric thiocarbonates such as hexathiodicarbonate salts and thioesters are used as pesticides and preservatives. Certain oligomeric thiocarbonate salts, notably quaternary ammonium hexathiodicarbonates, are prepared. The compounds are stabilized with added base and/or sulfide.

Abstract: Oligomeric thiocarbonates such as hexathiodicarbonate salts and thioesters are used as pesticides and preservatives. Certain oligomeric thiocarbonate salts, notably quaternary ammonium hexathiodicarbonates, are prepared. The compounds are stabilized with added base and/or sulfide.

Abstract: Oligomeric thiocarbonates such as hexathiodicarbonate salts and thioesters are used as pesticides and preservatives. Certain oligomeric thiocarbonate salts, notably quaternary ammonium hexathiodicarbonates, are prepared. The compounds are stabilized with added base and/or sulfide.

Abstract: This invention relates to monoxanthates and dixanthates of dipropylene glycol and triethylene glycol. These xanthates increase both the rate of plant growth and the concentration of chlorophyll in the plants.

Abstract: This invention relates to certain phenoxybenzoates having excellent selective herbicidal properties. The compounds of the present invention are defined by the formula ##STR1## wherein L, M and N are independently hydrogen, halogen, trihalomethyl, nitro, cyano, C.sub.1-4 alkyl, C.sub.

Abstract: This invention relates to a method of recovering non-ferrous metal sulfides from a metal ore which comprises subjecting the metal ore, in the form of an aqueous pulp, to a froth flotation process in the presence of a flotating amount of a flotation collector wherein the collector comprises a compound which corresponds to one of the formulas ##STR1## wherein R.sup.1 is alkyl, aryl or aralkyl group wherein the aryl and aralkyl can be substituted with a halo or alkyl moiety;R.sup.2 is alkyl, aryl or aralkyl group wherein the aryl or aralkyl can be substituted with a halo or alkyl moiety;R.sup.3 is aryl or aralkyl unsubstituted or substituted with a halo or alkyl moiety;R.sup.4 is alkyl, aryl or aralkyl group wherein the aryl or aralkyl can be substituted with a halo or alkyl moiety; with the proviso that at least one of R.sup.1 and R.sup.2 must be aryl or aralkyl unsubstituted or substituted;under conditions such that the metal sulfide values are recovered in the froth.

Abstract: The present invention provides a new collector for use in the froth flotation of metal values from their ores. The collector comprises a synergistic mixture of alkyl xanthogen alkyl formates and dialkyl thionocarbamates, and yields metal recoveries superior to that achieved with either collector alone. According to the present invention the novel collector for use in froth flotation comprises a mixture of alkyl xanthogen alkyl formates having the general formula: ##STR1## wherein R is a branched or straight chain alkyl substituent having 1 to 6 carbon atoms, and R' is selected from the class consisting of ethyl and methyl; anddialkyl thionocarbamates having the general formula: ##STR2## wherein Y is a branched or straight chain alkyl substituent having 1 to 6 carbon atoms, and Y' is selected from the class consisting of ethyl and methyl.

Abstract: A batch process including a circulating reactor and an agitated reactor for the production of dialkyl xanthogen formates, including means to increase yields of products, inhibiting chloroformate hydrolysis, suppress production of xanthic anhydride as a byproduct, and generally control product/byproduct yields based on intended use. Certain product mixtures are particularly useful as flotation reagents, specifically collectors in the flotation of molybdenum-bearing copper ores, where molybdenum recovery has been increased by more than 10% without adverse effects on copper recovery.