Momentive Performance Materials Gmbh

Honeywell International Inc.

Harry Zumaque

Oliver Safarowsky

Lada Bemert

Beatrice Grau

Christian N Werner

Jessica Maurer

Christoph Steinberg

Oliver Safarowski

The invention relates to a silicone rubber composition having specific dielectric properties which can be used as insulator material in high voltage direct current applications and a method for the manufacture of cable accessories like cable joints. The invention comprises as well a method for the determination of the optimum dielectric properties and the related amount of dielectric active additives.

Use of a silicone rubber composition for the manufacture of an insulator for high voltage direct current applications

Provided herein are methods for the preparation of high purity stannous oxide comprising: (a) reacting a Sn salt with a Cdicarboxylic acid in the aqueous phase to form a suspension comprising a Sn-dicarboxylate complex; (b) washing the Sn-dicarboxylate complex with water to obtain a wash solution comprising a washed Sn-dicarboxylate complex essentially free of the anion of the Sn salt; and (c) reacting the washed Sn-dicarboxylate complex with a base to form high purity SnO, wherein the high purity SnO has an alpha radiation count of less than about 0.002 cph/cm.

Method for the preparation of high purity stannous oxide

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Cologne, Germany

Harry Zumaque