Hoechst Aktiengesellschaft

Clariant Corporation

Ticona Gmbh

Hoechstaktiengesellschaft

Hoechst Research Technology Deutchland Gmbh & Co. Kg

Axel Schonfeld

Helmut Scheckenbach

Erwin Dietz

Andreas Schleicher

Georg Frank

Siegfried Weis

Willi Kreuder

Gernot Feucht

Michael Haubs

Stefan Disch

Bernd Dewald

Gordon Calundann

Heinz Rieger

George Frank

Cholesteric phase-forming polymers, process for their preparation and

The invention relates to colorant compositions consisting essentially of one or more cholesteric liquid-crystalline polymers and at least one colorant which absorbs light in the visible wavelength range. Suitable colorants are organic or inorganic pigments or dyes. Coatings comprising such colorant compositions feature color effects which are dependent on the viewing angle and which cannot be obtained by means of absorption pigments alone or by means of cLCP effect coatings.

Colored cholesteric liquid-crystal polymers having optically variable

Polymer sensor

The invention relates to polyarylene sulfoxides which are soluble in polar organic solvents, a process for their preparation and their use. Soluble polyarylene sulfoxides can be prepared by homogeneous partial oxidation of polyarylene sulfides. The homogeneous partial oxidation is achieved by dispersing the polyarylene sulfide in finely divided form in a solvent stable to oxidation, slowly adding a mild oxidizing agent and terminating the oxidation as soon as the polymer chains have reached a uniform degree of oxidation. The partially oxidized polyarylene sulfoxides are suitable for the production of coatings and shaped articles, such as fibers, membranes, films and nonwovens.

Soluble polyarylene sulfoxides, a process for their preparation and

The crystal oscillator sensor is provided with a coating comprising a polymer having olefinic side groups. The coating polymer used is, for example, substituted polyacrylate, polymethacrylate, polystyrene or polyester. The sensor is suitable for detecting ozone.

Crystal oscillator sensor

The invention relates to cholesteric liquid-crystalline polymers containing at least one colored comonomer which absorbs light in the visible wavelength region. The colored comonomers can be bifunctional hydroxyl, amino and/or carboxyl derivatives of anthranthrone, anthraquinone, dioxazine, phthalocyanine, quinacridone, diketopyrrolopyrrole, perylene, perinone, azomethine or azo pigments or aminostilbenecarboxylic acids. Coatings containing such polymers are distinguished by coloristic effects which depend on the viewing angle and cannot be achieved by absorption pigments alone or by CLCP effect coatings.

Chiral CLCPs containing colored monomers

A process for preparing an effect coating having a perceived color which is dependent on the viewing angle, which comprises applying one or more non-curable cholesteric liquid-crystalline polymers, or at least one non-curable nematic liquid-crystalline polymer and at least one non-curable cholesteric liquid-crystalline polymer, in the form of a melt or in solution, to the article that is to be coated, and converting the applied polymer by temperature treatment into a film having a perceived color which is dependent on the viewing angle.

Effect coatings whose perceived color depends on the viewing angle

An effect powder coating having a perceived color which is dependent on the viewing angle, consisting essentially of one or more noncurable cholesteric liquid-crystalline polymers, or essentially of at least one noncurable nematic liquid-crystalline polymer and at least one noncurable cholesteric liquid-crystalline polymer.

Powder coatings whose perceived color depends on the viewing angle

Molding compositions or mixtures comprising a high-temperature-resistant polymer and at least one polymer containing sulfoxide groups are used for the production of a foam by exposure to heat. The foam is employed for heat-resistant insulating layers.

Foamable molding compositions

A molding composition or mixture comprising a polyamide and at least one polymer containing sulfoxide groups serves for the production of a foam material by the action of heat. The foam material is used for moldings and heat-resistant insulation layers.

Polyamide foams and process for their production

Molding composition based on fluoropolymers and process for producing foam material therefrom The invention relates to a molding composition based on fluoropolymers which additionally contain from 1 to 50% by weight of at least one polymer containing sulfoxide groups. The polymer containing sulfoxide groups comprises, in particular, polyarylene sulfoxide units of the formula:

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Wiesbaden, Germany

Axel Schonfeld