Huels Aktiengesellschaft

Hubertus Ohm

Joachim Mugge

Hans Ries

Walter Hellermann

Juergen Finke

Christian Gerth

Hans-Dieter Herrmann

Christian Baron

Klaus R Meyer

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

The present invention provides an economical process for the continuous hydrolytic polymerization of laurolactam.

Process for the continuous hydrolytic polymerization of laurolactam

Multilayer plastic pipes comprising a polyamide-based inner and outer layer, wherein the inner and outer layer are connected force-lockingly by means of at least one intermediate layer made of a mixture of a linear crystalline polyester and a polyamide, have improved stability to chemical agents and improved mechanical properties.

Multilayer plastic pipe

Multilayer thermoplastic composites comprising (a) a layer comprising a polyamide molding composition, (b) a layer comprising a polyester molding composition, and (c) an adhesion promoter intermediate layer (a) and layer (c) find use as structural components in the electrical engineering, machine production and automotive industries, and for foodstuff packaging films or multilayer pipes.

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Haltern, Germany

Hubertus Ohm