Wolff Walsrode Ag

Bayer Aktiengesellschaft

Wolff Warlsrode Ag

Wolff Walstrode Ag

Klaus Szablikowski

Wolfgang Koch

Lutz Hoppe

Rene Kiesewetter

Hans-Josef Buysch

Erhard Luhmann

Werner Lange

Klaus Balser

Reinhard Kniewske

Alexander Klausener

Eugen Reinhardt

Gunter Weber

Rainhard Koch

Jorn Breckwoldt

Jurgen Engelhardt

Michaela Wilke

Siegfried Korte

Jochen Kalbe

Erik-Andreas Klohr

Burkhard Kressdorf

Rudolf Behn

Detmar Redeker

Branislav Bohmer

Michael Piepho

Frank Hohl

Wolfgang Wagenknecht

Dieter Herzog

Fritz Loth

Hans-Gunter Poersch-Panke

Klaus Konig

Dieter Arlt

Hanns P Muller

Heinrich Alberts

Hans-Joachim Traenckner

Hanns-Peter Muller

Reinhard Langer

Gunter Sackmann

Joachim Simon

Hans-Georg Rast

Hanns-Peter M&uuml;ller

Sergej Schapowalow

Werner Karstens

Martin Lohrie

Sebastian Meyer-Stork

Jörg Neubauer

J&uuml;rgen Engelhardt

Branislav Boehmer

Oke Brauer

Bernd Haase

Volkhard M&uuml;ller

J&ouml;rg Neubauer

Heinrich Leffers

John Foster

J Orn Breckwoldt

Roland Bayer

Frank Berendes

Rainhardt Koch

Branislaw Bohmer

Dieter Kudora

Friedrich-Karl Lampert

A cellulose ether that is predominantly substituted in the C3 position of the anhydroglucose unit of the cellulose is described. In an embodiment of the present invention, the partial degree of substitution in the C3 position of the cellulose ether is &#x2267;60%, based on the total degree of substitution.

Cellulose ethers

A water-soluble, biodegradable hydroxyalkyl cellulose-2-hydroxycarboxylic acid ester is disclosed. The hydroxyalkyl cellulose-2-hydroxycarboxylic acid ester has: (i) a molecular degree of substitution of the hydroxyalkyl group of less than 1.5 (MS <1.5); and (ii) a molecular degree of substitution of the 2-hydroxycarboxylic acid group of greater than 0.4 and less than 3 (0.4<MS <3). Also described is a method of preparing the hydroxyalkyl cellulose-2-hydroxycarboxylic acid ester, and methods of using it, e.g., as a consistency regulator in at least one of foodstuffs, cosmetics, building materials, paints and strippers.

Water-soluble biodegradable hydroxyalkyl cellulose-2-hydroxycarboxylic acid esters which can flocculate

A cellulose ether that is predominantly substituted in the C3 position of the anhydroglucose unit of the cellulose is described. In an embodiment of the present invention, the partial degree of substitution in the C3 position of the cellulose ether is &gE;60%, based on the total degree of substitution. Also described is a process for preparing the cellulose ether of the present invention. The process involves, reacting cellulose, dissolved in N-methylmorpholine-N-oxide monohydrate (NMMNO) and optionally other inert organic solvents, with alkylation reagents. The reaction takes place in the presence of: (i) an insoluble solid phase catalyst, e.g., solid ion exchange resins based on polystyrene having quaternary ammonium groups; (ii) stabilizers, e.g., propyl gallate; and (iii) optionally additional soluble co-catalysts, e.g., trimethylbenzylammonium hydroxide.

Cellulose ethers and method for producing the same

Method for producing cellulose derivatives

The present invention relates to a process for the preparation of branched and/or crosslinked polyamino-ethers in which polyamino-ethers, which are prepared from glycol dichlorohydrins or polyglycol dichlorohydrins and diamines and still contain free chlorohydrin groups, are crosslinked in an essentially aqueous solution under alkaline conditions under the influence of heat.

Process for the preparation of retention and dewatering agents based on

The present invention relates to water-soluble, particularly ternary, preferably ionic, cellulose mixed ethers, more particularly to anionic water-soluble cellulose mixed ethers, as additives for drilling fluid applications.

Use of cellulose mixed ethers as additives for earth pressure shields

The present invention relates to novel thermoplastic, biodegradable polysaccharide ether esters, such as for example cellulose ether esters or starch ether esters, and to the production of such graft copolymers from polysaccharides, epoxides and dicarboxylic acid anhydrides and to the use thereof, for example as moldings, films or coatings.

Thermoplastic biodegradable polysaccharide derivatives, process for the

Superabsorbent polymers based on partly hydrolysed homopolymers and/or copolymers of acrylonitrile which are cross-linked through the incorporation of polyfunctional monomers, wherein 30 to 80 mol-% of the nitrile groups are converted into carboxylate groups, 20 to 70 mol-% of the nitrile groups are converted into carbonamide groups and 0 mol-% to 20 mol-% of the nitrile groups are unchanged, and the said cross-linked polymers possess a swelling capacity of 700 g/g in water and of up to 60 g/g in physiological saline and a gel strength of from 20 g to 100 g, their preparation and their use.

Superabsorbent polymers from cross-linked polyacrylonitrile emulsions

Polysaccharides corresponding to formula (I) ##STR1## in which S is a recurrent monosaccharide unit and

Process for the production of polysaccharides

A method for preparing a chloroethylglucopyranose which comprises

Method for preparing a mixture of .alpha.- and

The invention relates to a process for the production of carbonic acid esters of polysaccharides which is characterized in that polysaccharides are reacted with carbonic acid esters.

Process for the production of polysaccharide carbonates

The present invention relates to novel thermoplastic, water-insoluble cellulose hydroxyalkyl hydroxycarboxylic acid esters of the general structure

Thermoplastic cellulose ether ester graft copolymers and process for

The present invention relates to carboxymethylcellulose (CMC) having a lower degree of substitution and to its use in textile printing.

Carboxymethylcellulose and its use in textile printing

New polysaccharides have recurring units I or a salt thereof. ##STR1##

Polysaccharides, process for their preparation and their use

The invention relates to certain highly substituted carboxymethyl sulfoethyl cellulose ethers (CMSEC), to a simplified and economic process for their production and to their use as thickeners in textile printing.

Highly substituted carboxymethyl sulfoethyl cellulose ethers (CMSEC), a

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Walsrode, Germany

Klaus Szablikowski