Siemens Aktiengesellschaft

Merck Patent Gesellschaft MIT Beschrankter Haftung

Lemens Aktiengesellschaft

Ernst Wipfelder

Winfried Plundrich

Heiner Bayer

Wilhelm Hekele

Peter Hein

Ulrike Reeh

Rainer Basel

Helmut Lebisch

Ralf Wilcke

Georg Fuchs

Hermann Dietmar

Ludwig Pohl

Guenther Waitl

Klaus H&ouml;hn

Kurt Marquard

Barbara Lehner

Walter Fischer

Klaus Hoehn

G Unter Waitl

Windfried Plundrich

The invention relates to the field of machine elements for designing a composite of two parts, one of which is a rare-earth permanent magnet and the other of which is a metallic support.

Method for gluing together large-surfaced workpieces with opposed expansion coefficients in a stable manner and composite structure produced in this way

The invention relates to a one-component epoxy resin adhesive which is elasticated with silicone rubber and whose open joint time is adaptable to whichever production process it is being used in by the concentration of UV initiator and/or the duration and/or intensity of UV activation and which is therefore particularly suitable for automatable manufacturing processes, since the workpieces after initial fixing require no additional mounts even during thermal aftercuring. This adhesive is preferentially suitable for the extensive adhesive bonding of permanent magnets, such as in the assembly of a permasyn motor, for example.

Single component adhesive with an adaptable open joint time

An epoxysiloxane condensate is modified by means of an in situ reaction with an organic compound, which is di-functional or multifunctional if warranted. By means of the disclosed method, the characteristics of epoxysiloxane condensates, epoxy resin mixtures, epoxy resin formulations and molded bodies manufactured therefrom can be varied easily and economically.

Modified epoxysiloxane condensate, process for producing the same and its use as low-stress casting resins in the electronic and electrotechnical industry

A rapid and precise cementing of components to a surface is achieved using a specially modified cement on an epoxy base in that the parts to be cemented are precisely aligned at the cemented location, are fixed with UV light and are subsequently thermally hardened.

Method for cementing a component to a surface

Halogen-free epoxy resins that arise from the addition of an epoxy component to a phenol component with base catalysis are disclosed, whereby the molar mass can be adjusted by means of the molar ratios of the initial materials. The resulting resins can be used in the field of electronics, both as molding compounds and as circuit board materials and adhesives.

Halogen-free epoxy resin

A one-component epoxy resin for coverage of bare chips and for underfilling of flip chips is disclosed. Two polyol components are combined in the inventive epoxy resin which decidedly improve the properties of the resin with respect to coefficient of expansion, shrinkage stress, substrate adhesion, and reactivity.

One-component epoxy resin for covering electronic components

Process for the preparation of epoxysilanes

For improved flame retardant finishing and better processability of an epoxy anhydride reaction resin system, the present invention provides a reaction resin system supplemented with phosphinic and/or phosphonic acid anhydride as the hardener component. The phosphorus-containing anhydrides do not deteriorate the hardening characteristics. Molded members manufactured therefrom exhibit adequate flame retardant behavior even with slight proportions of phosphinic or phosphonic acid anhydride given a property profile that is otherwise unmodified.

Flame retardant reaction resin system

Reaction resin system with phosphorous-containing constituent

Resin system of phosphorus-containing acrylate, unsaturated compound and

Inorganic fillers and organic matrix materials with refractive index

One-component reactive resin system comprising a cure-inhibiting

A casting resin system containing epoxyalkylsiloxane is provided for covering optoelectronic components. The casting resin system includes a resin constituent containing a mixture of epoxyalkylsiloxanes and cycloaliphatic epoxy resins. The casting resin system can be hardened with a polycarboxylic acid anhydride as a hardener component to form molding materials that are transparent and color-stable.

Casting resin of epoxyalkylsiloxane, epoxy resin and anhyride

A halogen free casting resin suitable for covering electron devices with a fire retardant material contains an acidic ester of an hydroxy-functional phosphor compound and an organic anhydride. A stable mixture can be generated from the acidic ester and the hardener component of the casting resin, and further used for the hardening of epoxides resins. The acidic ester is chemically integrated in the epoxide resin matrix in a stable mixture, thereby improving the long term fire-retardancy of the casting resin molding compound without increasing the volatility of the mixture.

Fire retardant casting resin molding compounds based on epoxy resins and

An apparatus for manufacturing an otoplastic. An otoplastic is manufactured directly in the ear of a hearing-impaired person in that a deformable envelope is pulled over a die or over a shell or over an overlayed over-shell. This apparatus is then supplied with flowing otoplastic material between the die and the envelope, being supplied therewith in the ear. The envelope expands and assumes the shape of the auditory canal. After hardening or curing of the otoplastic material in the ear of the hearing-impaired person, the envelope and the die are removed and a module of either an in-the-ear or of a behind-the-ear hearing aid is integrated therewith.

Growing community of inventors

Munich, Germany

Ernst Wipfelder