Bayer Aktiengesellschaft

Ralph Ostarek

Karl-Erwin Piejko

Christian Lindner

Karl-Heinz Ott

Herbert Eichenauer

Manfred T Reetz

Claus H Wulff

Hans-Eberhard Braese

Otto Ganster

Frank Wingler

Heinrich Konigshofen

Ulrich Jansen

Otto Koch

Reiner Witkowski

The present invention is directed to a novel adhesive which is a mixture of

Mixtures of aqueous polymer dispersions

A method of producing ABS moulding compositions wherein a solution of polymers in group (A) solvents is gradually supplied to a polymerizing mixture of previously-formed soluble rubber, aromatic mono-alkenyl compounds, ethylenically unsaturated nitrites, optional other copolymerizable compounds and optionally a group (B) solvent or a mixture of group (A) and group (B) solvents, the gradual addition of the polymer solution to the polymerizing mixture being started before the beginning of phase inversion and at a monomer conversion rate of 5 to 15% and a viscosity of the polymerizing mixture of less than 20 Pa.sec with simultaneous continuation of polymerization, the group (A) solvent is an aliphatic (C.sub.1 -C.sub.8) or cycloaliphatic alcohol, ketone, ether, ester and/or nitrile, and the group (B) solvent is an aliphatic (C.sub.4 -C.sub.10), cycloaliphatic and/or aromatic hydrocarbon.

Method of producing ABS moulding compositions

An improved process for the preparation of .alpha.-methylstyrene polymers by aqueous emulsion polymerization in which a styrene monomer mixture is first polymerized in a quantity of from 0.5 to 8% by weight of the total quantity of monomers and thereafter an .alpha.-methylstyrene monomer mixture is polymerized batchwise or semi-continuously.

Process for the preparation of alpha-methylstyrene polymers

A process for processing polymers of the ABS type present in emulsion form and effectively stabilized against oxidative attack with optionally continuous recovery and direct reuse of untreated monomers, wherein a combination of at least one phenolic antioxidant having a molecular weight above 300 without ester groups in the molecule and at least one sulfur-containing co-stabilizer having a molecular weight above 500 without ester groups in the molecule is added to the ABS polymer emulsion for stabilization against oxidative degradation.

Process for working up stabilized ABS polymers with recovery of

Process for the preparation of mixtures of thermoplastic polymers in powder form from aqueous emulsions of

Mixtures of thermoplastic polymers in powder form

In the process according to the invention for the quasi-ionic polymerization of acrylic acid derivatives in organic solvents with initiators and zinc halides, the zinc halides are dissolved in the acrylic acid derivatives to be polymerized and the other components of the polymerization mixture are combined with this solution.

Process for the quasi-ionic polymerization of acrylic acid derivatives

The invention relates to a process for the quasi-ionic polymerization of acrylic acid derivatives, in which the polymerization is initiated by using special mercaptosilanes as initiators in the presence of nucleophilic or electrophilic catalysts.

Growing community of inventors

Duesseldorf, Germany

Ralph Ostarek