Huels Aktiengesellschaft

Huls Aktiengesellschaft

Huels Aktiengaellscaft

Juergen Finke

Martin Bartmann

Friedrich-Georg Schmidt

Wolfgang Neugebauer

Walter Hellermann

Udo Kowalczik

Joachim Muegge

Heinz-Guenter Poll

Hubertus Ohm

Christian Baron

Holger Koziel

A multilayered lightweight building board, comprising a support core, two cover layers on the support core, where the support core is made of laterally fused-together tubes. The tubes have an inner layer, and an outer layer, where the outer layer has a softening point 10-90.degree. C. lower than the softening point of the inner layer. The lightweight building board is made from compatible thermoplastic materials, so they can be mechanically recycled by the customary processing methods for thermoplastics.

Lightweight building board

Molding compounds comprising aromatic polyamides which contain from 0.001 to 10% by weight of a low molecular weight sulfonic acid amide display low melt viscosities and an increased resistance to hydrolysis and are thermoplastically processible.

Molding compounds comprising a thermoplastically processible aromatic

Molding compounds comprisign aromatic polyamides which contain from 0.01 to 10 mole % of a low molecular weight carboxylic acid amide display low melt viscosities and an increased resistance to hydrolysis and are thermoplastically processible.

Molding compounds comprising a thermoplastically processible, aromatic

Reducing 3,3', 5,5'-tetra-t-butyldiphenoquinone with 2,6-di-t-butylphenol, in the melt, in the presence of a 4-dialkylaminopyridine, and then dealkylating the intermediate formed, in the melt, by adding a phosphorus-containing acid or its derivative provides 4,4'-dihydroxybiphenyl of high purity in high yield.

Process for the preparation of 4,4'-dihydroxybiphenyl

A molding material comprising an imide group-containing aromatic polyamide, obtained by polycondensation of (A) an aromatic diamine of the general formula

Molding materials, containing imide group-containing aromatic polyamides

A molding composition, comprising an aliphatic/aromatic copolyamide polymer having statistically distributed throughout the polymer:

Molding composition consisting of aliphatic/aromatic copolyamide

A molding material, comprising the following monomer units:

Molding material comprising a thermotropic, aromatic polyester from

A high molecular weight aromatic polyamide molding composition prepared by the polycondensation reaction of:

Moldable high molecular weight aromatic polyamide from poly arylene oxy

The invention relates to aromatic polyamides and polyamidimides, and a method of manufacturing these by transamidation of aromatic biasmides of carboxylic acids, using aromatic di- and/or tricarboxylic acids or their anhydrides, in the melt, at temperatures between 220.degree. to 390.degree. C.

Method of manufacturing thermoplastically processible aromatic

The invention relates to a process for producing aromatic polyamides by melt condensation of

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Marl, Germany

Juergen Finke