Wacker-chemie Gmbh

Wacker Chemie Ag

Thomas Hierstetter

Jochen Dauth

Bernward Deubzer

Johann Schuster

Petra Gratzl

Christian Herzig

Richard Birneder

Christof Woerner

Birgit Peschanel

Robert Schrock

Thomas Frese

Kerstin Zeiler

Christof Wörner

Gerhard Skroch

Helmut Woehrl

Claus Hoefl

Joerg Pfister

Claus HÖFL

Irradiation curable addition crosslinkable organosilicon compositions employ a cyclopentadienyl platinum photocatalyst, and are rendered storage stable by incorporation of selected organophosphorus compounds, while cure is substantially unaffected.

Silicone compositions crosslinkable by irradiation with UV light

Base compositions for addition-crosslinking silicone compositions are continuously produced by, in a first stage, homogeneously mixing and kneading organopolysiloxanes and flowable prehydrophobized oxidic reinforcing fillers in a continuous kneading machine with kneading chambers arranged alongside one another. In a second, downstream, stage of the process, the compositions produced in the first stage are subjected to aftertreatment in a mixing apparatus in which the compositions have been subjected to a mixing procedure with introduction of shear force.

Continuous process for the production of base compositions for improved-stability silicone compositions

Base compositions for silicone compositions with viscosity &#x3c;500,000 mPas are continuously produced by, in a first stage, homogeneously mixing and kneading organopolysiloxanes (A) and prehydrophobized oxidic reinforcing fillers (B) in a continuous kneading cascade with kneading chambers arranged alongside one another, and in a second downstream stage, the compositions produced in the first stage of the process are subjected to aftertreatment in a mixing apparatus where the compositions have been subjected to a mixing procedure with introduction of shear force.

Continuous process for the production of organopolysiloxane compositions

A process for the continuous preparation of addition-crosslinking silicone rubbers from a base composition containing at least one polyvinyl polysiloxane and at least 10% by weight, based on the liquid silicone rubber, of hydrophobicized filler, by removing the base composition from a container whose volume reduces proportionally with the amount removed, and conveying the composition by way of a pump with a positive pressure difference to two further pumps () which convey the base composition onward, so a component A is prepared continuously by admixing at least one metal catalyst with one stream of the base composition, and a component B is prepared continuously and simultaneously by admixing the crosslinker and inhibitor with a second stream of the base composition, where the metal catalyst, crosslinker, and inhibitor are fed by way of a feed unit which meters in each of the substances.

Process for the continuous preparation of two-component addition-crosslinking silicone compositions

The invention describes novel organosilicon compounds containing oligoisobutylene or polyisobutylene groups and comprising at least one unit of the formula

Organosilicon compounds containing oligoisobutylene or polyisobutylene

Organosilicon compounds with amino-alkylene oxide functional groups containing amino groups are disclosed.

Organosilicon compounds with amino-alkylene oxide functional groups and

Ionic organosilicon compounds comprising siloxane units of the formula

Ionic organosilicon compounds and their preparation and use

Organosilicon compounds containing amino groups, their preparation and their use Organosilicon compounds containing amino groups and comprising a) siloxane units of the formula

Organosilicon compounds containing amino groups, their preparation and

The present invention relates to organosilicon compounds containing (meth)acryloxy groups which can be prepared in a simple manner with high selectivity using readily accessible starting substances. The organopolysiloxanes containing (meth)acryloxy groups rapidly crosslink in the presence of a photoinitiator and light. The compounds of the present invention may be employed in the production of coatings.

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Burghausen, Germany

Thomas Hierstetter