Abstract: A process for preparing ethylene homopolymers and copolymers in a tubular reactor having two or more polymerization zones at temperatures of between 150° C. and 350° C. and pressures in the range from 500 to 5000 bar, using oxygen as initiator, which comprises using, as molar mass regulator, one or more aliphatic ketones of the formula I, where the variable R1 is a C1-C6-alkyl or C3-C12-cycloalkyl, ethylene homopolymers and copolymers obtainable therefrom and their user for producing injection-molded products in the cosmetics, medical and food sectors are described.

Abstract: The invention relates to a method for producing thixotropic agents containing 0.1–30 wt.-% of at least one ethylene terpolymer wax, 5–7 wt.-% of at least one solvent, which is incompatible with the ethylene terpolymer wax, 5–85 wt.-% of of at least one solvent which is compatible with the ethylene terpolymer wax and with one or more of the first-named solvents.

Abstract: Composition comprising tricyclodecanedimethylol and at least one polymerizable compound, preferably selected from (meth)acrylic acid, esters thereof, O— and N-vinyl compounds, epichlorohydrin, C1— to C10-alkylene oxides, in a ratio of from 100:1 to 1:1.

Abstract: A process for preparing ethylene polymers by the high-pressure method comprises dissolving one or more free-radical initiators in one or more ketones of the formula I where R1 and R2 are identical or different and are selected from among C1-C6-alkyl and C3-C12-cycloalkyl and R1 and R2 may also be covalently linked to one another to form a 4- to 13-membered ring, prior to the polymerization, compressing the solution, metering it into the polymerization reactor at one or more points and subsequently carrying out the polymerization at from 150 to 380° C. and from 500 to 4500 bar.

Abstract: A process for preparing thixotropic agents comprising from 0.1 to 30% by weight of at least one ethylene terpolymer wax, from 5 to 70% by weight of at least one first solvent incompatible with the ethylene terpolymer wax, and from 5 to 85% by weight of at least one solvent compatible with the ethylene terpolymer wax and with said first solvent(s).

Abstract: Ethylene homopolymers and copolymers are prepared in a tube reactor at from 160° C. to 350° C. and pressures in the range from 500 to 5000 bar, with or without use of molar mass regulators, using a peroxide mixture comprising from 1 to 95 mol %, based on the total amount of the peroxide mixture, of at least one cyclic peroxide of the formula I, where the radicals R are identical or different and are selected from among alkyl groups and aryl groups, as polymerization initiator.

Abstract: A process for preparing ethylene polymers by the high-pressure method comprises dissolving one or more free-radical initiators in one or more ketones of the formula I where R1 and R2 are identical or different and are selected from among C1-C6-alkyl and C3-C12-cycloalkyl and R1 and R2 may also be covalently linked to one another to form a 4- to 13-membered ring, prior to the polymerization, compressing the solution, metering it into the polymerization reactor at one or more points and subsequently carrying out the polymerization at from 150 to 380° C. and from 500 to 4500 bar.

Abstract: Ethylene homopolymers and copolymers are prepared in a tube reactor at from 160° C. to 350° C.

Abstract: A process for preparing ethylene polymers by the high-pressure method comprises dissolving one or more free-radical initiators in one or more ketones of the formula I 1

Abstract: Cosmetic preparations comprising polyethylene waxes having improved organoleptic properties

Abstract: The invention relates to a method for producing ethylene homopolymers and copolymers in a tubular reactor having at least two polymerisation zones, at temperatures of between 150° C. and 350° C. and pressures of between 500 and 5000 bar, using oxygen as an initiator. Said method is characterised in that at least one aliphatic ketone of general formula (I) is used as a molar mass regulator. The variable R1 in formula (I) represents a C1-C6 alkyl or a C3-C12-cycloalkyl. The invention also relates to ethylene homopolymers and copolymers that can be obtained using the inventive method and the use of the same for producing injection-moulded products in the fields of cosmetics, medicine and food.

Abstract: In a process for preparing polyethylene waxes at from 200 to 350° C. and pressures in the range from 500 to 4 000 bar using molar mass regulators, a peroxide mixture comprising from 5 to 95% by weight of at least one cyclic peroxide of the formula I, where the radicals R are identical or different and are selected from among alkyl groups and aryl groups, is used as free radical initiator and a molar H2/ethylene ratio of from 1:2 000 to 1:40 000 is employed.

Abstract: Compounds which contain one or more groups of the formula (I)

Abstract: Emulsifiable ethylene polymers comprising copolymers of from 90 to 95% by weight of ethylene, from 4 to 10% by weight of one or more C3-C12 alkenecarboxylic acids, and from 0 to 1.2% by weight of one or more tertiary esters of the corresponding C3-C12 alkenecarboxylic acids, where the wax has a cinematic melt viscosity of from 800 to 3000 mm2/s, measured at 120° C.; and a process for preparing the novel emulsifiable ethylene polymers, emulsions comprising the novel ethylene polymers, a process for preparing the emulsions from the novel ethylene polymers, and also floor cleaners, car cleaners, leather cleaners and stone cleaners, and coatings for surfaces made from wood, metal, paper, glass or from plastics, comprising aqueous emulsions of the novel emulsifable waxes.

Abstract: In a process for preparing polyethylene waxes at from 200 to 350° C.

Abstract: Emulsifiable ethylene polymers comprising copolymers of