| 主权项 |
1. Compounds of the formula
R4R5R6Si—X3—(—Sy—Y—)m—Sy—X4—SiR7R8R9 (I) in which X3 and X4 independently of one another are alkylene, Y is a divalent, optionally substituted, optionally heteroatom-containing aliphatic, cycloaliphatic or aromatic group, y is an integer from 1 to 6, m is an integer from 0 to 20 and R4, R5, R6, R7, R8 and R9 independently of one another are —OH, —Ometal, alkyl, alkoxy, phenyl or phenoxy and at least one of the substituents R4, R5, R6, R7, R8 and R9 is a radical of the formula
—O—R5R6Si—X3′—(—Sy—Y—)m—Sy—X4—SiR7R8R9 (Ia) where the substituents and indices in the formula (Ia) have the definition stated above for formula (I), metal is a metal ion from the series of the alkali metals and alkaline earth metals, and optionally the radicals of the formula (Ia) are joined via one or more —Si—O—Si— units to further radicals of the formula (Ia). |
