| abstract |
The present invention relates to siloxane oligomers of formula (1) or (2).n n n Formula 1n n n n n n n n Formula 2n n n n n n n n In Formula 1 and Formula 2 above,n n n One or more functionalized alkyl groups are present per oligomer molecule.n n n The siloxane oligomers oligomerize the halogenalkyltrihalogensilanes in the presence of alcohols and water, optionally using (C 1 -C 18 ) alkyl-, phenyl-, aryl- or aralkyl-trihalogensilanes and / or silicon tetrachloride. After oligomerization, the halogenalkyl functionality is prepared by optionally modifying in a further step.n n n The siloxane oligomers can be used as coupling agents or as building preservatives in rubber mixtures. |