Basf Aktiengesellschaft

Basf Coatings Ag

Manfred Mielke

R&uuml;diger Sens

Karl Siemensmeyer

Guenther Seybold

Jochen Fricke

Ulrike Schl&ouml;sser

Peter Hoffmann

Erwin Hahn

Ekkehard Jahns

Werner Ostertag

Stephan Bauer

Helmut Auweter

Hans-Juergen Degen

Georg Henning

Peter Blaschka

Friedrich-Wilhelm Raulfs

Oliver Borzyk

Roman Benedikt Raether

Franz Weingart

Sigberg Pfohl

Heribert Bohn

Rüdiger Sens

Gerhard Berger

Peter Hauser

Ulrike Hees

Claudia Sierakowski

Bernardo Wolff

Hubertus Kroner

J&uuml;rgen Huff

Thomas Krüger

Dieter Freyberg

Ines Mangels

Thomas Frey

Benno Sens

Fritz Schwertfeger

Joachim Kuhn

Ulrich Schubert

Elisabeth Seyfried

Roland Caps

Karl-Heinz Von Dungen

Manfred Maier

Mike Freche

Walter Mächtle

Günter Etzrodt

Paul Günthert

Zenon-Paul Czornij

The invention relates to a method of producing color pastes, in which a component comprising colorant particles is dispersed in a binder. In the method of the invention the dispersing operation is controlled by beaming excitational light of a defined wavelength range into a mixture of the component comprising colorant particles and the binder, detecting the light transmitted, reflected and/or scattered by the mixture and determining a sample spectrum, evaluating the sample spectrum and hence determining parameters of the color paste, and monitoring changes in the sample spectrum over time and terminating the dispersing operation when predetermined target parameters are attained.

Method for the production of dyestuff pastes

Described is a process for preparing polymer-enrobed pigment particles, which comprises mixing in the presence of finely dispersed pigment particles a solution of a polymer in a first solvent with a second solvent in which the polymer is substantially insoluble. The pigment particle can be specifically modified by judicious selection of the polymer.

Method for producing polymer coated pigment particles by precipitation

Pigment preparations comprising alkoxylated polyethylenimine

The invention relates to colorant preparations containing the following main constituents: A) at least one dispersed (A1) or dissolved (A2) colorant; B) if a colorant corresponding to (A1) is used, a dispersing agent; C) a low-molecular polytetrahydurofurane (C1), optionally mixed with one or more difficult-to-evaporate, water-soluble or water-miscible organic solvents (C2); and D) water.

Colorant preparations

Dispersant

In moldings which have a density of from 0.1 to 0.4 g/cm.sup.3 and contain silica aerogel particles which have a mean diameter d.sub.m of from 0.001 to 8 mm and are bonded to one another by means of at least one organic or inorganic binder, the binder contains sheet silicates and/or clay minerals.

Moldings containing silica aerogel particles and their preparation

Gels for thermotropic layers, obtainable by irradiation of a mixture comprising

Gels with thermotropic properties

SiO.sub.2 aerogels containing carbon particles are obtainable by heating

SiO.sub.2 aerogels containing carbon particles and their preparation

A molding based on supercritically dried silica aerogel parts in the form of spherical particles having a diameter of from 0.1 to 10 mm or sheet-like pieces having a thickness of from 2 to 30 mm and a diameter of from 1 to 5 cm, wherein the molding is produced by pressing at from 500.degree. to 1000.degree. C. and at from 0.5 to 10 bar, if necessary under a protective gas, such as nitrogen, without addition of binders.

Moldings or sheets made from silica aerogels

The wet-end coloring of paper with pigments and fixers is carried out by a process in which the pigment and fixer are added simultaneously to the paper pulp to be colored, and the fixer used is a cationic fixer, in an amount of from 0.01 to 3% by weight, based on the dry paper pulp to be colored.

Coloring paper

A thermal insulating material based on a pigment-containing silica aerogel is obtainable by

Thermal insulating material based on pigment containing silica aerogels

A stationary container equipped with an inlet and an outlet and filled with grinding medium encloses a drivable, rotatably mounted stirrer whose active surfaces are formed as impellers for the grinding medium which are closely adjacent to the inner surface of the container.

Stirred ball mill for grinding pigments

Growing community of inventors

Heidelberg, Germany

Manfred Mielke