Wacker-chemie Gmbh

Consortium Fur Elektrochemische Industrie Gmbh

Eckhart Louis

Wolfgang Hechtl

Ernst Wohlfarth

Paul Hittmair

Heinrich Marwitz

Erhard Bosch

Klaus Marquardt

Norman Dorsch

Karl Braunsperger

August Schiller

Oswin Sommer

Jurgen Burkhardt

Heinz Hefner

Gunter Dressnandt

Ernst Aigner

Walter Keil

Franz Heinrich Kreuzer

Hermann Meyer

A paste composition which is used in the preparation of dental impression compositions containing:

Paste composition containing an organopolysiloxane, platinum and filler

This invention relates to adhesive compositions which may be used for bonding laminated glass and for glueing silicon semiconductor elements onto substrates in manufacturing solar cells. These adhesive compositions contain organopolysiloxanes having SiC-bonded vinyl groups and Si-bonded hydrogen as well as catalysts which promote the addition of Si-bonded hydrogen to vinyl groups. All of the organopolysiloxanes in these compositions are free of Si-bonded hydroxylk or alkoxy groups and contain on the average 2 to 1,000 silicon atoms per molecule in which at least 99.5 percent and preferably 99.9 percent of the number of Si-bonded hydrogen atoms are present in organopolysiloxanes containing one Si-bonded hydrogen atom per molecule and one SiC-bonded vinyl group per molecule or containing 2 Si-bonded hydrogen atoms per molecule and at least 99.5 percent and preferably 99.9 percent of the number of SiC-bonded vinyl groups are present in organopolysiloxanes containing one Si-bonded hydrogen atom per molecule and one SiC-bonded vinyl group per molecule or containing 2 SiC-bonded vinyl groups per molecule.

Adhesive compositions and method employing same

An organopolysiloxane composition comprising

Organopolysiloxane compositions and a process for treating organic fibers

Cyclic dimethylpolysiloxanes are prepared by heating a mixture containing linear or branched organopolysiloxanes consisting of at least 50 mol percent dimethylsiloxane units and aqueous sulfuric acid in which the aqueous sulfuric acid contains from 50 to 85 percent by weight of sulfuric acid, while simultaneously recovering the cyclic dimethylpolysiloxanes thus formed.

Process for preparing cyclic dimethylpolysiloxanes

Curable compositions which can be stored under anhydrous conditions, but when exposed to atmospheric moisture cross-link to form elastomers, which consists of (1) a diorganopolysiloxane having terminal condensable groups, (2) a silicon compound containing at least three hydrolyzable groups per molecule in which the hydrolyzable groups are amino groups bonded to silicon via nitrogen and/or oxime groups bonded to silicon via oxygen and (3) at least one additional component which improves adhesion of the elastomers obtained from said compositions to substrates, in which the additional component (3) is an organosilicon compound containing at least one siloxane-oxygen atom and at least one amino group which is bonded to silicon by carbon.

Curable compositions and elastomers prepared therefrom

Organosilicon compounds having at least one hydrocarbon radical linked to at least 75 percent of the silicon atoms via an oxygen atom in which the hydrocarbon radical has at least one hydroxyl group and may be linked again to the same silicon atom or to another silicon atom via an oxygen atom are added to room temperature curable organopolysiloxane compositions to form compositions which are resistant to flow on vertical surfaces. When these compositions are exposed to atmospheric moisture at room temperature, they form elastomers having decreased Shore hardness and modulus on the surface in contact with the substrate as compared to the surface exposed to atmospheric moisture.

Organosilicon compounds as additives for curable organopolysiloxane

The invention relates to a method for preparing a dental impression which comprises applying a dental impression material to a tooth of which an impression is to be taken, curing the material and thereafter removing the resulting impression from the tooth, said dental impression material being a mixture of

Dental impression materials

Bituminous organopolysiloxanes which are capable of being cured comprising a bituminous material and a modified organopolysiloxane capable of being cross-linked.

Curable bituminous organopolysiloxane compositions

The invention relates to a method for preparing dental impression materials which comprises mixing A. a diorganopolysiloxane containing terminal triorganosiloxy groups in which at least one of the triorganosiloxy groups contains a vinyl group with B. an organopolysiloxane having at least three Si-bonded hydrogen atoms per molecule, C. a catalyst capable of promoting the addition of Si-bonded hydrogen to vinyl groups at room temperature and, if desired, D. additives, such as fillers, pigments, flavoring substances and plasticizers.

Growing community of inventors

Burghausen, Germany

Eckhart Louis