Ticona Gmbh

Hoechst Aktiengesellschaft

Frank Reil

Ursula Ziegler

Klaus Kurz

Gerhard Reuschel

Ulrich Haack

Frank Reuter

Marco Prigandt

Werner Aumüller

Uwe Stenglin

Bernhard Ulmer

Stefan Diel

Hermann Kleinegesse

Kai-Uwe T&ouml;nnes

Volker Pieper

Composites are described, comprising polyacetal and at least one thermoplastic polyamide elastomer formed by a polyacetal molding which has been partially or completely coated with the thermoplastic polyamide elastomer or onto which one or more moldings composed of the thermoplastic polyamide elastomer have been directly molded. The composites are characterized in that the polyacetal and the thermoplastic polyamide elastomer have been bonded adhesively or cohesively to one another via injection of the polyamide elastomer onto the polyacetal molding, and in that the tensile bond strength between the polyacetal and the thermoplastic polyamide elastomer is at least 0.5 N/mm. The composites may be used as connectors, as functional components with integrated sealing properties and/or with integrated damping properties, or else as non-slip and easy-grip elements.

Composite bodies, method for the production thereof and use thereof

Composite bodies, processes for making them, and their uses are disclosed, the composite bodies comprising a polyacetal portion and a modified thermoplastic vulcanizate portion bonded together, wherein the modified thermoplastic vulcanizate portion comprises a modified thermoplastic vulcanizate elastomer having a hardness of 30 to 90 Shore A and wherein the modified thermoplastic vulcanizate elastomer comprises: (a) 2 to 75% by weight of an at least partially crosslinked ethylene-propylene-diene rubber in from 1 to 50% by weight of a polyolefinic matrix further comprising 0.05 to 10% by weight of an ingredient selected from the group consisting of stabilizers, crosslinking aids, and mixtures thereof; (b) 1 to 30% by weight of a compatibilizer; and (c) 10 to 70% by weight of a non-olefinic thermoplastic material, all percentages by weight based on a total weight of the modified thermoplastic vulcanizate elastomer.

Composite bodies having a polyacetal portion and a thermoplastic vulcanized elastomer portion, processes for making the same, articles including such bodies and uses therefor

Composite products are described and encompass at least one polyacetal molding and at least one polyolefin molding, which have been bonded at at least one of their surfaces using an adhesion-promoting layer which is substantially composed of a copolymer or of a mixture of these which derives from at least one alpha-olefin and from at least one ethylenically unsaturated carboxylic acid, and/or from at least one ethylenically unsaturated carboxylic acid derivative, where the molar ratio of alpha-olefin to ethylenically unsaturated carboxylic acid and/or to ethylenically unsaturated carboxylic acid derivative is selected so as to obtain composites with a bond strength (measured by the tensile test at 23&#xb0; C.) of at least 0.2 N/mm. The composite products described can in particular be used for producing components which come into contact with fuels.

Composite body made from polyacetal, bonding agent and polyolefin, method for production and use thereof

A process is described in which surfaces of foamed plastics are provided with electrical conductor tracks, with the aid of selectively ablating processes. The process permits low-cost production of moldings from plastic with conductor tracks integrated on the surface. The products of the process may be used in the electrical and electronics industries, for example.

Process for applying conductor tracks to the surface of plastics moldings

A black thermoplastic molding composition which containing a dye combination made from nonabsorbing, non-black polymer-soluble dyes which produce a black thermoplastic molding composition which is translucent or transparent to laser light.

Thermoplastic molding composition and its use for laser welding

Rotatable plastic rollers are produced by either injecting between a roller shaft and an outer running roller layer a thermoplastic material which, during cooling down, shrinks toward the roller shaft and away from the outer running roller layer on account of a contraction in volume or, in the multi-component injection-molding process, by first injecting the outer running roller layer and then injecting between the latter and the roller shaft a thermoplastic material which then likewise shrinks toward the roller shaft and away from the outer running roller layer. The process produces plastic rollers comprising an inner running roller layer ( ), which is bonded solidly with the roller shaft ( ), and an outer running roller layer ( ), which can rotate freely with respect to said inner layer by means of a sliding gap ( ). The roller shaft may optionally also be sheathed with a thermoplastic elastomer. This may take place in the same process during the multi-component injection molding.

Method of making rotatable rolls of plastic material

A process for the production of electrically conductive layers on the surface of plastics in which the surface of a plastic filled with electrically conductive constituents is irradiated with laser energy in such a way that the plastic is evaporated down to a predetermined depth at the point of incidence by the laser energy, leaving behind the electrically conductive constituents, which increase in concentration and thus form an electrically conductive layer. With the aid of the process, plastic moldings with integrated electrically conductive layers or tracks on the surface can be produced, for example components used in the electrical and electronics industries or other large or small plastic parts of any desired shape which are provided with conductive elements in certain places. The molding can also be a constituent of a composite article with other materials.

Production of conductor tracks on plastics by means of laser energy

Process for producing a composite article from a polyacetal (component a) with directly molded-on functional elements made from one or more thermoplastic elastomers (component b), and wherein components a and b have differing hardness, and the material with the greater hardness (component a) is initially premolded in a first step in a mold, and then is either cooled and removed from the mold and then placed into another, larger cavity, or is partially removed from the mold, but remains in a portion of the mold, and is then moved to a larger cavity, or, without removal from the mold, remains in the same mold, which is enlarged by means of a movable device, and in a second step, by overmolding with the material with the lesser hardness (component b), the molding formed from component a is firmly bonded to this material and is then removed from the mold as a composite article.

Method for producing composite bodies

The novel molding made from a combination of polyacetal with directly molded-on function elements is distinguished by the fact that the function elements comprise one or more elastomers. Such elastomers comprise partially or fully hydrogenated nitrile rubbers, one- or multicomponent silicone rubbers or sulfur-containing rubbers.

Polyacetal moldings with directly molded-on function elements

The novel molding made from a combination of polyacetal with directly molded-on function elements is distinguished by the fact that the function elements comprise one or more elastomers. Such elastomers comprise partially or fully hydrogenated nitrile rubbers, one- or multi-component silicone rubbers or sulfur-containing rubbers.

Growing community of inventors

Seeheim-Jugenheim, Germany

Frank Reil