Rubber mixtures
View Patent ↗Rubber mixtures are disclosed comprising (A) at least one styrene-butadiene rubber, (B) at least one filler and (C) at least one polysulphidic organo(alkyl polyether silane) of the general formula I [(X)(X′)(X″)Si—R I ] 2 —S m I. The mixtures are prepared by mixing at least one styrene-butadiene rubber, and at least one filler and one polysulphidic organo(alkyl polyether silane) of the formula (I). The rubber mixtures can be used for the production of mouldings.
1. A rubber mixture, comprising
(A) at least one styrene-butadiene rubber,
(B) at least one filler,
(C) more than one polysulphidic organo(alkyl polyether silane) compound of the general formula I
where
X is an alkyl polyether group —O—((CR II 2 ) w —O—) t -Alk having from 14 to 29 carbon atoms, t=from 2 to 9, w=from 2 to 9,
R II is, each independently of the other, H, a phenyl group or an alkyl group,
Alk is a branched or unbranched, saturated or unsaturated, aliphatic, aromatic or mixed aliphatic/aromatic monovalent C 10 -C 25 -hydrocarbon group,
X′ is branched or unbranched alkyl, branched or unbranched alkoxy, a branched or unbranched C 2 -C 25 alkenyloxy group, a C 6 -C 35 aryloxy group, a branched or unbranched C 7 -C 35 alkylaryloxy group, a branched or unbranched C 7 -C 35 aralkyloxy group, or an X,
X″ is branched or unbranched alkyl, branched or unbranched alkoxy, a C 2 -C 25 alkenyloxy group, a C 6 -C 35 aryloxy group, a branched or unbranched C 7 -C 35 alkylaryloxy group, a branched or unbranched C 7 -C 35 aralkyloxy group, or an X,
R I is a branched or unbranched, saturated or unsaturated, substituted or unsubstituted, aliphatic, aromatic or mixed aliphatic/aromatic divalent C 1 -C 30 hydrocarbon group,
m is from 1 to 12,
wherein the alkyl polyether groups of the polysulphidic organo(alkyl polyether silane) compounds are variously ethoxylated,
(D) a thiuram sulphide accelerator and/or carbamate accelerator and/or the corresponding zinc salts,
(E) a nitrogen-containing co-activator,
(F) optionally additional rubber auxiliaries, and
(G) optionally additional accelerators.
2. The rubber mixture according to claim 1 , wherein the polysulphidic organo(alkyl polyether silane) compounds have been absorbed onto an inert organic or inorganic carrier or has been previously reacted with an organic or inorganic carrier.
3. A process for preparation of the rubber mixture according to claim 1 comprising mixing together at least one styrene-butadiene rubber, and at least one filler and more than one polysulphidic organo(alkyl polyether silane) compound of the formula (I) are mixed.
4. A molding formed of the rubber mixture according to claim 1 .
5. An article of manufacture made from the rubber mixture according to claim 1 .
6. The article of manufacture according to claim 5 which is selected from the group consisting of a pneumatic tire, tire tread, cable sheathing, hose, drive belt, conveyor belt, roll coverings, tire, shoe soles, sealing ring and damping element.
7. The rubber mixture according to claim 1 , wherein the alkyl polyether groups of the polysulphidic organo(alkyl polyether silane) compounds have an average degree of ethoxylation of 5.
8. The rubber mixture according to claim 1 , wherein the Alk is a C 13 -hydrocarbon group.
9. The rubber mixture according to claim 1 , wherein
Alk is a C 13 -hydrocarbon group, and
the alkyl polyether groups of the polysulphidic organo(alkyl polyether silane) compounds are variously ethoxylated and have an average degree of ethoxylation of 5.
10. A rubber mixture, comprising
(A) at least one styrene-butadiene rubber,
(B) at least one filler,
(C) more than one polysulphidic organo(alkyl polyether silane) compound of the general formula I
where
X is an alkyl polyether group —O—((CR II 2 ) w —O—) t -Alk having from 14 to 29 carbon atoms, t=from 2 to 9, w=from 2 to 9,
R II is, each independently of the other, H, a phenyl group or an alkyl group,
Alk is a branched or unbranched, saturated or unsaturated, aliphatic, aromatic or mixed aliphatic/aromatic monovalent C 10 -C 25 -hydrocarbon group,
X′ is branched or unbranched alkyl, branched or unbranched alkoxy, a branched or unbranched C 2 -C 25 alkenyloxy group, a C 6 -C 35 aryloxy group, a branched or unbranched C 7 -C 35 alkylaryloxy group, a branched or unbranched C 7 -C 35 aralkyloxy group, or an X,
X″ is branched or unbranched alkyl, branched or unbranched alkoxy, a C 2 -C 25 alkenyloxy group, a C 6 -C 35 aryloxy group, a branched or unbranched C 7 -C 35 alkylaryloxy group, a branched or unbranched C 7 -C 35 aralkyloxy group, or an X,
R I is a branched or unbranched, saturated or unsaturated, substituted or unsubstituted, aliphatic, aromatic or mixed aliphatic/aromatic divalent C 1 -C 30 hydrocarbon group,
m is from 1 to 12,
wherein the alkyl polyether groups of the polysulphidic organo(alkyl polyether silane) compounds have different t,
(D) a thiuram sulphide accelerator and/or carbamate accelerator and/or the corresponding zinc salts,
(E) a nitrogen-containing co-activator,
(F) optionally additional rubber auxiliaries, and
(G) optionally additional accelerators.