申请人:Knobloch Gerrit
公开号:US20100130660A1
公开(公告)日:2010-05-27
The invention describes an improved method for the preparation of rubber compounds which comprises compounding the rubber and the components at 125-200° C. in the presence of an amount of 0.1-2% based on the weight of the rubber of a processing stabilizer of the formula (I) wherein R
1
is hydrogen, C
1
-C
20
alkyl, styryl, α-methyl-styryl or —CH
2
—S—R
3
; or C
1
-C
20
alkyl substituted with C
2
-C
20
alkenyl, C
3
-C
20
alkinyl, C
5
-C
9
cycloalkyl, phenyl or tolyl; R
2
is C
1
-C
20
alkyl or —CH
2
—S—R
3
, R
3
is C
1
-C
20
alkyl; with phenyl, hydroxyl, cyano, formyl, acetyl or —O—CO—R
5
substituted C
1
-C
20
alkyl; C
2
-C
20
alkenyl, C
3
-C
20
alkinyl, C
5
-C
9
cycloalkyl; or with hydroxyl, phenyl, 4-chloro-phenyl, 2-methoxycarbonylphenyl, p-tolyl, 1,3-benzthiazol-2-yl, —(CHR
5
)COOR
6
or —(CHR
5
)CONR
7
R
8
substituted C
5
-C
9
cycloalkyl; R
4
is hydrogen or methyl, R
5
is hydrogen or C
1
-C
6
alkyl, R
6
is C
1
-C
20
alkyl; with oxygen or sulfur interrupted C
3
-C
20
alkyl; C
5
-C
9
cycloalkyl, phenyl, benzyl or tolyl, R
7
and R
8
are independently of each other hydrogen or C
1
-C
6
alkyl, and n is 1 or 2.