Rohm Gmbh

Degussa-Huels Aktiengesellschaft

Universal Gesellschaft Fur Umwelttechnik Mbh

Tilman Taeger

Ernst Pfleiderer

Juergen Christner

Gertrud Wick

Rolf Monsheimer

Ursula Bernschein

Burkhard Standke

Jaroslaw Monkiewicz

Michael Horn

Peter Jenkner

Helmut Mack

Roland Edelmann

Albert-Johannes Frings

Eckhard Just

Ralf Laven

Manfred Kaussen

Helmut Lohmann

Stephan Ramlow

Dietrich J Von Der Pahle

Eberhard Kreuzburg

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

A method for preparing unhaired hides ready for tanning from hides and skins using proteolytic and lipolytic enzymes in the beamhouse, whereby in at least one of the partial steps of the beamhouse consisting of a) liming in the pH range 11.5-14 and b) bating in the pH range 5-11.5, alkaline lipases (E.C.3.1.3.) having an activity optimum in the pH range 9-11 are added to the aqueous floats corresponding to these partial steps.

Method for the enzymatic liming of skins and hides

A method for liming hides and skins using a proteolytic enzyme in an aqueous-alkaline float is taught, wherein the liming float has a pH value from 10-14 and contains both thiourea dioxide and an alkaline protease having elastase activity.

Method for liming hides and skins

Liquid enzyme preparations comprising at least one anhydrous organic liquid as a vehicle for one or more enzymes and methods for using such preparations e.g. in beamhouse operations in the commercial production of leather.

Methods for leather processing including liquid enzyme formulation

The soaking of hides and skins is enzymatically assisted in a method using an aqueous float having a pH from 9 to 11 which contains

Enzymatic soaking method

A method for the wet degreasing of raw hides and skins, pelts, and wet blues under the conditions of enzymatic bating, wherein enzymatic bating of the hide stock is carried out with proteolytic enzymes in the presence of synthetic surface active substances, for example, a mixture of a non-ionic emulsifier and anionic emulsifier.

Method for the wet degreasing of hide and skin stock

Tanning agents containing a complex formed between chromium ions and an acrylate or methacrylate polymer and further including an organically bound thio group present in said polymer or in a mercapto compound added to the tanning agents, and methods for pickling, tanning, and retanning skins and hides with such tanning agents.

Acrylate tanning agent

A process for liming skins and hides with preservation and separation of the hair, including the following successive steps:

Method for liming skins and hides

Liquid enzyme preparations

An enzymatic method for the unhairing of hides and skins in the alkaline pH range by treating them in a liquor at a pH from 9 to 11 with a proteolytic enzyme having an optimum activity in the pH range from 2 to 7.5, and then unhairing.

Enzymatic unhairing method

What is disclosed is a process for the unhairing and subsequent curing of hides and skins, which comprises washing flayed skins and hides to remove adhering dirt, then soaking said skins and hides and freeing them of hair and scud with a short term unhairing, reversing the swelling of said skins and hides and neutralizing them, and curing said skins and hides with salt, said skins and hides being mechanically fleshed either after washing or at some later time in the process as recited.

Process for producing unhaired, storable hides and skins

A method and a device for converting and separating substances dissolved in a carrier fluid, more particularly proteides or proteins, by adding and mixing with an agent, e.g. enzymes, which brings about the chemical reaction or the build-up or breakdown of the molecules of the substances and causes them to precipitate. In addition these substances are mixed and come to an accelerated reaction with the agent in at least one circuit flow through a jet immersion reactor while a gas is supplied intensively thereto before froth flotation of the precipitated substances is carried out after adding means assisting flotation.

Growing community of inventors

Seeheim-Jugenheim, Germany

Tilman Taeger