Chemische Fabrik Stockhausen Gmbh

Stockhausen Gmbh & Co Kg

Degussa-huels Aktiengesellschaft

Manfred Kaussen

Dolf Stockhausen

Helmut Lohmann

Kurt Dahmen

Hans-Georg Hartan

Alfons Landscheidt

Burkhard Standke

Jaroslaw Monkiewicz

Michael Horn

Peter Jenkner

Helmut Mack

Roland Edelmann

Albert-Johannes Frings

Richard Mertens

Eckhard Just

Ralf Laven

Miroslav Chmelir

Tilman Taeger

Waldemar Inger

Stephan Ramlow

Leonardus Strijbos

Rudolf Nowak

Horst Kilian

Helmut Stoelcker

An oligomerized polyorganosiloxane cocondensate which may be obtained, in part, by mixing an water-soluble amino-functional organosilane represented with at least one of the followoing: a fluoro-functional organosilane, an organosilane, and an organosilane. The cocondensate may be used, for example, in a method of treating surfaces.

Oligomerized organopolysiloxane cocondensate, its production and its use for treatment of surfaces

Process for waterproofing leather at low pH-values and leathers

Process for treating leathers with surfactants to improve water

Process for waterproofing materials having a fibrous structure and

Use of copolymers having polysiloxane units in the treatment of leather

The present invention relates to a process to improve the organoleptic behavior and the physical characteristics of leather by the use of aqueous solutions of copolymers of 90 to 20%-wt acrylic acid or methyacrylic acid, as well as 10 to 80%-wt of a monomer of the formula ##STR1## wherein R.sub.1 is hydrogen or methyl; R.sub.2 and R.sub.3, which are equal or different, are methyl or ethyl; x stands for an optionally branched alkylene radical with 1 to 5 carbon atoms; the amine nitrogen is optionally neutralized or quaternized; and the molecular weight of the copolymer, measured at a pH of 8.0, is less than 100,000. The concentration of the copolymer in the aqueous solution is 0.02 to 10%-wt, relative to the shaved weight of the leather.

Acrylic copolymers for re-tanning

The present invention relates to a process to improve the organoleptic behaviour and the physical characteristics of leather by the use of aqueous solutions of copolymers of 90 to 20%-wt acrylic acid or methyacrylic acid, as well as 10 to 80%-wt of a monomer of the formula ##STR1## wherein R.sub.1 is hydrogen or methyl; R.sub.2 and R.sub.3, which are equal or different, are methyl or ethyl; x stands for an optionally branched alkylene radical with 1 to 5 carbon atoms; the amine nitrogen is optionally neutralized or quaternized; and the molecular weight of the copolymer, measured at a pH of 8.0, is less than 100,000. The concentration of the copolymer in the aqueous solution is 0.02 to 10%-wt, relative to the shaved weight of the leather.

Retanning process

A process for the finish dressing of leathers dressed by a mineral or a combined method, by treatment with an aqueous solution of water soluble polymer dressing substances that are polymers of unsaturated monomers that contain sulfonic groups. These polymers contain, if necessary, additional basic units that do not affect the water solubility, these being derived from the comonomers that can be copolymerized with the monomers that contain the sulfonic groups and which do not contain phosphorus.

Process for finish dressing minerally dressed leathers or those dressed

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Aachen, Germany

Manfred Kaussen