Lanxess Deutschland Gmbh

Bayer Aktiengesellschaft

Renke Mottweiler

Dirk Achten

Zsolt Szentivanyi

Michael Klimpel

Lothar Reif

Emilie Barriau

Heinrich Berg

Stefan Glander

Oskar Nuyken

Joachim Probst

Bruno Bomer

Joachim Konig

Rudiger Musch

Heinz Baumgen

Knut Panskus

Rüdiger Musch

Christiane Oppenheimer-Stix

Norbert Schildan

Christian Mähner-Wolfarth

Mesut Fidan

Thomas-Oliver Neuner

Steven Pask

Thomas Dittmer

Hans-Peter Muhlbauer

Marc Lagarde

Rainer Grafe

Eberhardt Muller

Peter Hoeltzenbein

Pascal Debayle

Rainer Gräfe

Eberhardt Müller

Aqueous polymer dispersions based on polychloroprene, a process for their preparation and their use in adhesive formulations. The aqueous polymer dispersion is obtained by

Aqueous adhesive dispersions

Disclosed are systems and methods for producing a polymer dispersion based on polychloroprene, comprising steps of polymerizing chloroprene to polychloroprene, adding the polycholoprene dispersion to a stripper column, and removing chloroprene from the polychloroprene dispersion.

Method for producing a polychloroprene-based polymer dispersion and system for producing a polychloroprene-based polymer dispersion

The present invention relates to dithiocarbamic esters, their preparation and their use for regulating the degree of polymerization during the polymerization of monomers, such as during the polymerization of chloroprene to give polychloroprene, and during the polymerization of 2,3-dichlorobutadiene to give poly-2,3-dichlorobutadiene, and during the copolymerization of chloroprene with 2,3-dichlorobutadiene. The present invention further relates to polymers which are obtainable via the polymerization of monomers in the presence of the dithiocarbamic esters of the invention. The present invention also relates to polymers which contain end groups derived from the dithiocarbamic esters of the present invention.

Dithiocarbamic esters

Cationic sizing agents for paper, obtainable by a process in which a water-soluble cationic terpolymer compound, built up in a chemically uniform manner, of (a) 7 to 40% by weight of N,N-dimethylaminoethyl acrylate and/or methacrylate, (b) 40 to 80% by weight of styrene and (c) 4 to 50% by weight of acrylonitrile, the sum of components (a) to (c) always being 100% by weight and at least 10% of the dimethylamino groups of the terpolymer being quaternized with monoepoxides, with the exception of epihalogenohydrins, and the remainder being protonated, is dissolved in an aqueous medium and, in the presence of 10 to 70% by weight--based on the following monomer mixture--of this emulsifier, (d) 5 to 95% by weight of acrylonitrile, meth-acrylonitrile or styrene or mixtures thereof and (e) 5 to 95% by weight of acrylic acid ester and/or methacrylic acid ester with 1 to 12 C atoms in the alcohol radical--the sum of components (d) and (e) always being 100% by weight--are emulsified and the emulsion thus obtained is subjected to emulsion polymerization, initiated by free radicals, at temperatures of 20.degree. to 150.degree. C.

Cationic sizing agents for paper

The production of polymers containing terminal halogen groups from cationically polymerizable monomers using a metal halide boiling below 50.degree. C. at normal pressure as catalyst and an organic halide corresponding to the following general formula ##STR1## in which X is halogen,

Process for the production of polymers containing reactive terminal

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Leverkusen, Germany

Renke Mottweiler