Wolff Walsrode Ag

Dow Global Technolgoies LLC

Wolff Warlsrode Ag

Werner Lange

Klaus Szablikowski

Rene Kiesewetter

Frank Hohl

Branislav Bohmer

Gunter Weber

Hartwig Schlesiger

Jürgen Engelhardt

Jörn-Bernd Pannek

Martin Morning

Holger Tanneberger

Wilhelm Oppermann

Bernd Schriewer

René Kiesewetter

Ren&eacute; Kiesewetter

J&ouml;rn-Bernd Pannek

Friedrich-Karl Lampert

Hans-Guenter Poersch-Panke

Juergen Engelstardt

Lutz Driesen

Hans-Günter Poersch-Panke

The present invention relates to the continuous preparation of alcohol- and plasticizer-free finished nitrocellulose solutions having a particularly low water content by partial distillative falling-film evaporation of comparatively water-rich, optionally emulsion-like crude nitrocellulose solutions which are preferably provided by dissolving nitrocelluloses of the customary solid forms offered, which are known to be initially water-moist as a result of the preparation, in preferably ethyl acetate.

Process for the preparation of nitrocellulose solutions having a low water content

Described is a building material composition prepared from or having added thereto a particulate material selected from particulate polysaccharides or particulate polysaccharide derivatives. The particulate material of the building material composition is prepared by a method comprising: (a) forming a feed composition comprising a member selected from the group consisting of polysaccharides and polysaccharide derivatives, and 35 wt. % to 99 wt. % of water, based on the total weight of the feed composition, wherein said member is at least one of swelled and dissolved in the feed composition; (b) contacting, in a mill, the feed composition with a gas stream, thereby converting simultaneously the water of said feed composition into water vapor, and said member of said feed composition into a solid state form of finely particulate material; (c) separating the particulate material from the gas stream; and (d) optionally drying the particulate material. Examples of building material compositions according to the present invention include tile adhesives and joint fillers.

Building material compositions

This invention relates to a process for producing a substantially fiber-free carboxymethyl cellulose which predominantly exhibits elastic properties, to the use thereof as a superabsorbent material, and to the use thereof as an adjuvant substance for achieving suitable rheological and water retention properties for the cosmetics, pharmaceutical and food sectors, and for industrial applications, e.g. as an additive for coating materials, for the sealing of cables and for use in tunnelling and in civil and underground engineering.

Essentially fiber-free cellulose ether with improved water retention, method for the production and use thereof

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 invention relates to a new class of water-soluble ionic cellulose derivatives and their use as additive for gypsum- and cement-containing compounds.

Water-soluble sulphoalkyl hydroxyalkyl derivatives of cellulose and

The invention relates to water-soluble ionic cellulose derivatives and their use as additives for gypsum- and cement-containing compounds.

Use of water-soluble sulphoalkyl derivatives of cellulose in gypsum-and

Water-soluble polymers consisting of from 40 to 80 mole percent of residues corresponding to the following formula (I) ##STR1## in which X.sup..sym. is a cation or H.sup..sym., from 10 to 30 mole percent of residues corresponding to the following formula (II) ##STR2## from 0 to 30 mole percent of residues corresponding to the following formula (III) ##STR3## and from 0 to 10 mole percent of residues corresponding to the following formula (IV) ##STR4## residues I to IV being statistically distributed in the polymer and the sum of the mole % of I-IV always having to amount to 100.

Water-soluble polymers and their use as flushing liquid additives for

The present invention relates to new water-soluble copolymers based on acrylic acid derivatives and their use as building material auxiliaries.

Water-soluble polymers and use as building material auxiliaries

New water-soluble copolymers based on acrylic acid derivatives and their use as auxiliaries for building materials.

Water-soluble polymers and their use as auxiliaries for building

Water-soluble substances of high molecular weight obtained by reacting hydroxyalkyl methyl celluloses with copolymers of 2-acrylamido-2-methyl-3-propane sulfonic acid/acrylamide/ethylacrylate and a bifunctional crosslinking component in an alkaline medium.

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Visselhovede, Germany

Werner Lange