Dow Global Technolgoies LLC

Wolff Walsrode Ag

Holger Tanneberger

Lutz Hoppe

Werner Lange

Jürgen Engelhardt

Martin Lohrie

Bernd Schriewer

Lutz Riechardt

Volker Eckhardt

Hans-Guenter Poersch-Panke

Lutz Driesen

Juergen Engelstardt

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

A process is described for the continuous preparation and/or workup of polysaccharide derivatives by reaction and/or conditioning in a suspension with liquid reaction partners, in which, in accordance with,

Continuous process for the production and/or workup of polysaccharide derivatives

A process for producing compacted free-flowing nitrocellulose based lacquer raw materials is described. The process involves pressing a nitrocellulose based lacquer feed material, which is moistened with alcohol or water, through the holes of a die. The pressing step may be performed by means of at least one circulating breaker. The process optionally comprises shearing off the compacted lacquer raw material into pieces of selected length, below the die. The compacted nitrocellulose based lacquer raw materials prepared by the process of the present invention are free flowing and have a moisture content of at least 25%.

Method for producing compacted free-flowing raw materials for varnish

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Bad Fallingbostel, Germany

Holger Tanneberger