Hoechst Aktiengesellschaft

Franz Gubitz

Hans Vowinkel

Walter Grolik

Gunther Reitzel

Peter Jaksch

Ursula J Ritter, Nee Zoller, Legal Heir

Jean-Pierre Nething

Volker Ritter, Deceased

Rolf Orth

Eckhard Kuhnhenne

Mathias Schremmer

A liquid filter for purifying mineral oil, the components of which are composed of a thermoplastic polymer, preferably polyacetal, is produced by welding the individual parts. Since no foreign materials are present, the filter can be subjected to a recycling process easily and without problem.

Liquid filter

A composite article of a massive carrier layer of a polyester material which can comprise up to 50% by weight of another polymer material which is compatible with it, and if appropriate up to 50% by weight of reinforcing and/or filling additives and other auxiliaries, and a decorative layer, which is built up, if appropriate, from several layers of materials which influence the visual properties and/or haptic properties and which all essentially comprise polyester material, the carrier layer of which is anchored undetachably in the contact area with the layer of material of the decorative layer which is in contact with it, the layers of the composite article in their entirety having a composition such that a homogeneous mixture of the same composition can be employed again to produce a structural element of plastic which has adequate mechanical data, is described. A process for the production of these composite articles furthermore is described.

Composite article of a carrier layer and decorative layer, and a process

Process for the production of a polypropylene composite

Plastic moldings, preferably comprising a polypropylene molding composition comprising from 95 to 50 parts by weight of isotactic polypropylene or a copolymer of propylene containing up to 10% by weight of ethylene, from 5 to 50 parts by weight of rubber-like, polypropylene-compatible copolymers and from 0 to 50 parts by weight of reinforcing fillers in the underlayer, suitably colored and provided with a single-layer paint coat, are highly suitable for external applications on automobiles.

Plastic molding having a painted surface

The scratch resistance of plastic surfaces can be improved by providing the surfaces with a novel grain structure.

Shaped plastic article having a grained surface of improved scratch

Growing community of inventors

Kelkheim, Germany

Franz Gubitz