Ticona Gmbh

Hoechst Aktiengesellschaft

Stefan Disch

Klaus Kurz

Helmut Scheckenbach

Gerhard Reuschel

Michael Haubs

Martin Bruck

Michael Hoffmockel

Axel Schonfeld

Klaus Delpy

Kurt Witan

Klaus Kohlhepp

Ernst Hofmann

Peter Eckardt

Tilo Vaahs

Karl-Friedrich M&uuml;ck

The present invention relates to a polyoxymethylene molding composition comprising In the case of these polyoxymethylene molding compositions the selection of the colorants is no longer restricted to conventional colorants suitable particularly for POM. The products produced therewith are particularly stable during processing and feature low formaldehyde emission, defect-free surfaces, and high color fastness.

Colored polyoxymethylene molding compounds and molded parts produced therefrom

The invention relates to moldings or molding compositions composed of polyoxymethylene and featuring very low formaldehyde emission, comprising from 0.1 to 50.0% by weight of a tribological modifier, from 0.01 to 0.5% by weight of a cyclic stabilizer which contains at least one nitrogen atom in the ring, and from 0.05 to 1% by weight of at least one ester composed of a polyhydric alcohol and of at least one (C-C) fatty acid, and also to their production and use.

Low-emission, tribologically modified polyoxymethylene molding compositions and moldings produced therefrom

A small amount of an absorber mixture comprising activated aluminum oxide and potassium permanganate deodorizes the space within closed, gastight packs, in particular the space within packs of the type in which objects or materials which comprise polyacetal or otherwise release formaldehyde are present. Deodorization here is the removal (i.e. elimination or absorption) of volatile constituents emerging from plastic moldings or from plastic materials, in particular cleavage products, such as formaldehyde. The process is particularly suitable for the packaging of moldings or of assemblies which are to be used in the medical sector, in the food and drink sector or in any other sector affecting health.

Absorption of formaldehyde in closed, gastight packs

Colorant concentrates made from free-flowing polyoxymethylene copolymer as carrier, 15-80% by weight of colorant, 2-15% by weight of nitrogen-containing stabilizer and 0-15% by weight of dispersion aid for coloring pellets or molding compositions made from polyoxymethylene (POM) and for producing colored injection moldings or colored POM extrudates. The products produced with this colorant preparation are particularly stable during processing and have very low formaldehyde emissions.

Colorant concentrates for dyeing polyoxymethylene moulding materials

The invention relates to a process for preparing blends of high-performance polymers. The particular features are that at least two single-type polymers are treated with a solvent or a solvent mixture in which the polymers used are soluble, the polymers are thereby dissolved, and are then precipitated in a liquid medium, and recycled material is used for each of the polymeric constituents.

Process for preparing polymer blends by recycling high-performance

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 process for the preparation of polyarylene sulfones by oxidation of polyarylene sulfides with an oxidizing agent in the presence of a liquid is carried out under reduced pressure so that the liquid boils. The reaction temperature can easily be kept constant in the process.

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Konigsstein, Germany

Stefan Disch