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:
Mar. 11, 2003
Filed:
Jul. 18, 2000
Norman Dorsch, late of Burghausen, DE;
Rudolf Heinrich, Emmerting, DE;
Oswin Sommer, Salzburg, AT;
Stefan Oberneder, Burghausen, DE;
Wolfgang Hechtl, Burghausen, DE;
Wacker-Chemie GmbH, Munich, DE;
Abstract
The invention relates to a method for producing organopolysiloxane terminated with alkoxy groups, wherein A) organopolysiloxane terminated with HO is reacted with B) alkoxysilane having at least three alkoxy groups and/or whose partial hydrolysate is made to react in the presence of C) acid phosphoric acid ester of general formula (I): (HO) OP(—O—[(CR ) —O] [(CR ) ] —L—M) , wherein a=1 or 2; R and R =a hydrogen, methyl or hydroxyl radical; b and d=2 or 3; c=integral values from 2 to 15; e=0 or 1; L=a radical from the group —O—, —COO—, —OOC—, —CONR —, —NR CO— and —CO—; R and R =a hydrogen or a C -C -alkyl radical and M=a monovalent, optionally a hydroxyl, fluorine, chlorine, bromine, C -C -alkoxylalkyl or cyano group substituted C - to C -hydrocarbon radical, provided that the radicals R and R can only be at one given time a hydroxyl radical in each hydrocarbon atom. The invention further relates to RTV-1-alkoxy masses comprising the reaction product containing organopolysiloxane terminated with alkoxy groups as the essential constituent.