Bayer Aktiengesellschaft

Werner Maurer

Johann Zimmer

Rolf-Volker Meyer

Artur Haus

Karl-Heinz Passon

Jutta Rottger

Wilfried Kortmann, Deceased

Peter Selinger

Aqueous dispersions of copolymers and graft copolymers of ethylenically unsaturated perfluoroalkyl monomers having at least 6 C atoms in the perfluorinated chain and ethylenically unsaturated monomers containing no perfluoroalkyl groups, which additionally contain certain ester compounds which cannot be used as comonomers, are outstandingly suitable for finishing textile materials, leather and the like. Excellent oleophobic and hydrophobic effects are obtained.

Dispersions of copolymers containing perfluoroalkyl groups

Condensation products which are obtained from formaldehyde, di-hydroxyaryl sulphones, phenols, if desired, and hydroxyarylcarboxylic acids and are prepared in a one-stage reaction at pH values between 2 and 5 are suitable as fixing agents for basic dyestuffs.

Formaldehyde condensates and their preparation

Process for the preparation of aniline condensation dyestuffs by reacting aniline and/or an alkylaniline batchwise, in cycles or continuously with nitrobenzene, which can be substituted and/or diazoaminobenzene, with warming and in the presence of a catalyst, characterized in that the reaction mixture is worked up continuously.

Process for the preparation of aniline condensation dyestuffs

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Leverkusen, Germany

Werner Maurer