申请人:Wiedemeier Melanie
公开号:US20140155518A1
公开(公告)日:2014-06-05
The present invention relates to silica-containing rubber mixture produced from at least one rubber, from a sulphur-containing alkoxysilane, from a crosslinking agent, from a filler, and optionally from further rubber auxiliaries, where the said mixture comprises from 0.1 to 15 parts by weight, based on 100 parts by weight of rubber used, of a silicon-free polysulphide additive of the formula (I)
A-S—(S)
x
—S—B (I)
in which x is 0, 1, 2, 3 or 4,
A is a moiety
and
B is a moiety
in which
R
1
to R
4
are identical or different and are hydrogen, C
1
-C
6
-alkyl, C
5
-C
6
-cycloalkyl, C
6
-C
10
-aryl or a group —CH
2
—OR
5
, —CH
2
—CH
2
—OR
5
, —NHR
5
, —COR
5
, —COOR
5
, —CH
2
COOR
5
, where R
5
=hydrogen, C
1
-C
6
-alkyl, C
5
-C
6
-cycloalkyl, C
6
-C
10
-aryl or C
1
-C
6
-acyl, and
R
6
to R
7
are identical or different and are hydrogen C
1
-C
6
-alkyl, C
5
-C
6
-cycloalkyl, C
6
-C
10
-aryl or a group —CH
2
—OR
5
, —CH
2
—CH
2
—OR
5
, —NHR
5
, —COR
5
, —COOR
5
, —CH
2
COOR
5
, with R
5
=hydrogen, C
1
-C
6
-alkyl, C
5
-C
6
-cycloalkyl, C
6
-C
10
-aryl or C
1
-C
6
-acyl and
y, z are mutually independently 0, 1 or 2, or
A and B are mutually independently one of the moieties
in which
R
1
and R
2
are identical or different and are hydrogen, C
1
-C
6
-alkyl, C
5
-C
6
-cycloalkyl, C
6
-C
10
-aryl or a group —CH
2
—OR
5
, —CH
2
—CH
2
—OR
5
, —NHR
5
, —COR
5
, —COOR
5
, —CH
2
COOR
5
, where R
5
=hydrogen, C
1
-C
6
-alkyl, C
5
-C
6
-cycloalkyl, C
6
-C
10
-aryl or C
1
-C
6
-acyl.