| 主权项 |
1. A silica-containing rubber mixture comprising:
a silica-containing rubber; and a silicon polysulphide additive of the formula (I)
R4R5R6Si—X3—(—Sy—Y—)m—Sy—X4—SiR7R8R9 (I)in which
X3 and X4, independently of one another, are alkylene,Y is a divalent, aliphatic, cycloaliphatic or aromatic group,y is an integer from 1 to 6,m is an integer from 0 to 20, andR4, R5, R6, R7, R8 and R9, independently of one another, are —OH, —Ometal, alkyl, alkoxy, phenyl or phenoxy, wherein 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),and metal is a metal ion from the series of the alkali metals and alkaline earth metals and wherein the silicon polysulphide additive for the formula (I) is added to and mixed with the silica-containing rubber mixture. |
