The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 07, 2009
Filed:
Jan. 17, 2006
Wolfgang Schattenmann, Burghausen, DE;
Georg Loher, Braunau, AT;
Thomas Koehler, Kastl, DE;
Wacker Chemie AG, Munich, DE;
Abstract
The present invention relates to a process for preparing organopolysiloxanes by reacting halosilane with alcohol and water in the presence of the desired organopolysiloxane in a reaction unit comprising a distillation column, optionally a reflux condenser, and a vessel already containing desired organopolysiloxane, by heating the vessel contents to boiling under reflux, introducing halosilane into the column above the lower column end, removing hydrogen halide from the distillation column and continuously removing organopolysiloxane from the vessel at the same rate in which it is formed, by constantly adding halosilane, alcohol and water to the reaction unit in such amounts that more water is always present in the reaction unit than is consumed by the added Si-halogen units of the halosilanes.