| CPC C08L 9/00 (2013.01) [C08K 3/36 (2013.01); C08K 5/0025 (2013.01); C08K 5/548 (2013.01); C08L 2203/00 (2013.01); C08L 2312/08 (2013.01)] | 16 Claims |
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1. A sulfur-crosslinkable rubber mixture comprising at least the following constituents:
50 to 100 phr of at least one polyisoprene selected from the group consisting of natural and synthetic polyisoprene and
5 to 500 phr of at least one silica and
2.5 to 8 phr of sulfur and
at least one silane B having the general empirical formula I)
(R1)oSi—R2—Sn—R2—Si(R1)o I)
where the two o may independently be the same or different and each assume a value of 1, 2 or 3 and R1 may independently be the same or different and are selected from alkoxy groups having 1 to 10 carbon atoms, cycloalkoxy groups having 4 to 10 carbon atoms, phenoxy groups having 6 to 20 carbon atoms, aryl groups having 6 to 20 carbon atoms, alkyl groups having 1 to 10 carbon atoms, alkenyl groups having 2 to 20 carbon atoms, alkynyl groups having 2 to 20 carbon atoms, aralkyl groups having 7 to 20 carbon atoms, halides or
alkyl polyether groups —O—(R6—O)r—R5 where R6 are the same or different and are branched or unbranched, saturated or unsaturated, aliphatic, aromatic or mixed aliphatic/aromatic bridging C1-C30 hydrocarbon groups, r is an integer from 1 to 30, and R5 is unsubstituted or substituted, branched or unbranched, terminal alkyl, alkenyl, aryl or aralkyl groups,
or
two R1 form a cyclic dialkoxy group having 2 to 10 carbon atoms, in which case o<3,
or two or more silanes of formula I) may be bridged via R1, and
in formula I), in each (R1)oSi— group, R1 i) is bonded to the silicon atom via an oxygen atom or ii) is a halide;
and R2 may independently be the same or different and are unbranched alkylene groups having 6 to 20 carbon atoms,
and where n is an integer from 2 to 10.
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