Fraunhofer-gesellschaft Zur Foerderung Der Angewandten Forschung E.v.

Vasopharm Biotech Gmbh

Lothar Fröhlich

Michael Popall

Stéphane Jacob

Ruth Houbertz-Krauss

Frank Kahlenberg

Konrad Olma

Wolfgang Pfleiderer

Harald Schmidt

Peter Kotsonis

Stephane Jacob

Shahriyar Taghavi-Moghadam

A silane resin that can be structured photochemically and/or thermally is obtained by at least partial condensation of a mixture of a) at least one silane compound RRSiXwherein R is a group polymerizable photochemically and/or thermally via an organic group by radical or cationic polymerization; Ris a straight-chain, branched, or cyclic C-Calkyl group; X is identical or different and is a leaving group; a is 1 or 2; b is 0 or 1; a+b is not more than; and b) at least one silanediol RSi(OH)wherein Ris identical or different and is a straight-chain, branched, or cyclic C-Calkyl group or a group polymerizable photochemically and/or thermally via an organic group by radical or cationic polymerization, provided the group does not contain aryl. The silane resins have dielectric properties useful in extremely high frequency applications.

Silane-based resins that can be photochemically and/or thermally structured, single-step method for their production, parent compounds and production methods that can be used for said resins

This invention relates to a silane-resin composition that can be obtained by at least partial hydrolytic condensation of at least the following components: (1) one or more sulfonic acid group-containing silane(s) with at least one group that can be cleaved under hydrolytic conditions, (2) one or more styryl-functionalized silane(s) and (3) one or more silane(s) that carry a nitrogen-containing heterocyclic compound, an amine group or a sulfonamide group with at least one group that can be cleaved under hydrolytic conditions, and mixing of the components before, during or after the hydrolytic condensation, as well as a process for the production of this composition. With the silane resin that is obtained, proton-conductive, organically cross-linked heteropolysiloxanes can be produced that are suitable for PEMFC in a layer or membrane form as proton-conductive systems. Their proton conductivity can be further increased by the addition of suitable liquids.

Proton-conductive membranes and layers and methods for their production

A silane resin that can be structured photochemically and/or thermally is obtained by at least partial condensation of a mixture of a) at least one silane compound RRSiXwherein R is a group polymerizable photochemically and/or thermally via an organic rest by radical or cationic polymerization; Ris a straight-chain, branched, or cyclic C-Calkyl group; X is identical or different and is a leaving group; a is 1 or 2; b is 0 or 1; a+b is not more than 2; and b) at least one silanediol RSi(OH)wherein Ris identical or different and is a straight-chain, branched, or cyclic C-Calkyl group or a group polymerizable photochemically and/or thermally via an organic rest by radical or cationic polymerization, provided the group does not contain aryl. The silane resins have dielectric properties useful in extremely high frequency applications.

Silane-based resins that can be photochemically and/or thermally structured single-step method for their production, parent compounds and production methods that can be used for said resins

The invention relates to a method for preparing silanes comprising styryl groups, said silanes being represented by the general formula (I):(St)SiR'Rwith improved yields through a reaction with magnesium in a solvent mixture comprising from 30:70 to 70:30 (v/v) of diethyl ether and tetrahydrofuran.

Method for preparing styryl-functionalized silanes

Compounds of formula (I), where preferably: A=a bridge of partial formula (II) or (III), Rand R=independently (substituted) alkyl, aryl or aralkyl, or together form a heterocycle, R=H, &#x2014;CO-Alkyl, or &#x2014;CO-Aryl, R=Aryl, &#x2014;CO&#x2014;O-Aryl or &#x2014;CO-Aryl and R=H, are potent inhibitors of NO-synthase and are suitable as pharmaceutical agents of prophylaxis and treatment of disease states associates with a disturbed NO metabolism.

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Würzburg, Germany

Lothar Fröhlich