Abstract: Disclosed is a method for producing a polymeric hydroperoxide which forms a radical polymer but no low-molecular radical under redox influence. According to the inventive method, a synthetic polymer containing at least one tertiary hydroxyl group or olefin function is reacted with concentrated hydrogen peroxide and a concentrated mineral acid.

Abstract: The invention relates to a method of bleaching and/or delignifying cellulose, in which (a) a sodium hydroxide solution and a peroxydisulphate solution are first of all produced by electrolysis of a sulphate, (b) the peroxydisulphate solution is converted by hydrolysis into a Caro's acid/caroate solution, (c) said Caro's acid/caroate solution is left to cool and (d) used immediately as a bleaching solution for bleaching and/or delignifying cellulose, the Caro's acid/caroate solution becoming neutralised upon introduction into the bleaching solution.

Abstract: The invention relates to a method of bleaching and/or delignifying cellulose, in which

Abstract: The new compound t-butylperoxycyclododecyl oxalate is described, as well as a method of preparing it and use of the compound as a polymerization initiator.

Abstract: Disclosed is a catalyst system for the production of ethylene co-polymers by co-polymerisation of ethylene with further polymerisable monomers in the presence of a peroxide catalyst. The catalyst system contains components (A) and (B), component (A) being at least one organo-aluminium compound of the general formula AlR.sub.3, in which R is an alkyl, alkenyl, aryl, aralkyl or cycloalkyl radical, and component (B) is at least one organic peroxide.

Abstract: For the production of polyolefins by polymerization of .alpha.-olefins in the presence of a peroxide catalyst a catalyst system is used as the catalyst which is composed of the components (A) and (B) in which:(A) denotes at least one compound selected from the group of organoaluminium compounds of formula AlR3 in which R represents an alkyl, alkenyl, aryl or cycloalkyl group; and(B) denotes at least one organic peroxide.

Abstract: The present invention provides a master batch composition based on elastomeric carriers, comprising an organic peroxide, a plasticizer and a filling material and optionally further additives compatible with the organic peroxide, wherein, in addition to the elastomeric carrier, it contains a polyoctenamer.The present invention also provides a process for the production of a master batch composition, wherein (a) the elastomeric carrier, the polyoctenamer, the plasticizer and optionally a part of the filling material or filling material mixture are homogeneously mixed and thereafter (b) the filling material or the filling material mixture or possibly the remaining amounts thereof, together with the organic peroxide, are incorporated at a temperature below the decomposition temperature of the peroxide.

Abstract: Disclosed is a diacylperoxide vinyl ester of the general formula I ##STR1## in which R is an alkylene residue which can be straight-chained, branched or cyclic and which can contain 2 to 10 C atoms or R is an aryl residue, suitable for copolymerization with olefinic unsaturated monomers under conditions in which they do not yet radically decompose.

Abstract: A process for the preparation of aralkyl hydroperoxides having the formula (I) is described ##STR1## in which n=1, 2 or 3, Ar means a phenyl group which can be substituted with halogen or one or more branched or straight chain alkyl groups with 1 to 5 C-atoms, or a naphthyl group, and each radical R.sup.1 and R.sup.2 means a low alkyl radical, the alkyl radicals R.sup.1 and R.sup.2 together having 2 to 4 carbon atoms, by reaction of aralkyl carbinols having the formula (II) ##STR2## in which Ar, R.sup.1, R.sup.2 and n have the meaning given for formula (I), with hydrogen peroxide under acid conditions, the reaction being carried out in the presence of an acid-combining agent. An alkali sulphate, ammonium sulphate, alkali hydrogen sulphate and/or ammonium hydrogen sulphate is used in preference as the acid-combining agent. Tert.aralkyl hydroperoxides can be prepared in high yield with a high purity in a simple and safe manner with this process.

Abstract: The present invention provides a process for cross-linking organopolysiloxanes by means of a bis-benzoyl peroxide derivative with heating, wherein, as bis-benzoyl peroxide derivative, there is used at least one compound of the general formula: ##STR1## in which the symbols R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5, each independently of one another, have the following meanings: R.sup.1 and R.sup.5 are the same or different and signify alkoxycarbonyl radicals with 2 to 4 carbon atoms in the alkyl moiety or fluorine or hydrogen atoms, R.sup.2 and R.sup.4 are the same or different and signify alkyl radicals with 2 to 8 carbon atoms or hydrogen atoms and R.sup.3 signifies an alkyl radical with 1 to 8 carbon atoms or a hydrogen atom, at least 2 symbols and at most 4 symbols per benzene ring signifying hydrogen atoms.

Abstract: The present invention provides a process for cross-linking non-polar polymers in a high-frequency electric alternating field with the use of a peroxide as cross-linking agent, wherein the cross-linking agent used is a peroxide of the general formula: ##STR1## in which R.sup.1 is a hydrogen atom, an alkyl radical containing up to 4 carbon atoms or a phenyl radical optionally substituted by halogen atoms or alkyl radicals containing up to 4 carbon atoms;R.sup.2, R.sup.3, R.sup.4 and R.sup.5, which can be the same or different, are hydrogen atoms or, together with the carbon atoms to which they are attached, represent o-phenylene radicals;A is a straight-chained or branched alkylene radical containing up to 5 carbon atoms or a straight-chained or branched alkylene radical containing up to 5 carbon atoms or a phenylene radical and;R.sup.6 is a hydrogen atom or a radical of the general formula ##STR2## in which R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 are identified as above.