C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 77/08 (2006.01) B01J 31/22 (2006.01) C07F 7/02 (2006.01) C07F 7/10 (2006.01) C07F 7/18 (2006.01) C07F 7/21 (2006.01) C08F 4/80 (2006.01) C08F 8/42 (2006.01) C08G 77/00 (2006.01) C08G 77/04 (2006.01) C08G 77/06 (2006.01) C08G 81/02 (2006.01) C07B 61/00 (2006.01)
Patent
CA 2472169
The invention relates to a process for the preparation of polyorganosiloxanes and polyorganosilanes of high purity by an addition reaction of siloxanes and/or silanes which contain at least one H-Si group with compounds having olefinic double bonds in the presence of a platinum catalyst and optionally further additional components, wherein the reaction is carried out in the presence of a platinum(0) complex catalyst which was dissolved in a solvent before addition to the reaction medium and to whose solution an effective amount of at least one unsaturated hydrocarbon having 2 to 6 carbon atoms was added.
La présente invention a pour objet un procédé de préparation de polyorganosiloxanes et de polyorganosilanes de haute pureté par réaction d'addition de siloxanes et/ou de silanes contenant au moins un groupe H-Si avec des composés comportant des doubles liaisons oléfiniques, en présence d'un catalyseur au platine, et optionnellement d'autres composés. La réaction a lieu en présence d'un catalyseur complexe au platine (0) dissous dans un solvant avant son ajout au milieu réactionnel, milieu auquel une quantité efficace d'au moins un hydrocarbure insaturé ayant de 2 à 6 atomes de carbone avait été ajoutée.
Knott Wilfried
Pott Thomas
Evonik Goldschmidt Gmbh
Goldschmidt Ag
Marks & Clerk
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