Use of silane coupling agent with carbon black to enhance the balance of reinforcement properties of rubber compounds
AssigneeColumbian Chemicals Company
InventorsRonald A. Swor, Rodney L. Taylor
Life of this patent
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Abstract
A method of improving balance of properties, such as increased reinforcement and reduced rolling resistance of a rubber compound, comprising mixing the rubber compound with a carbon black and a silane coupling agent for a period of between about 10 seconds and 20 minutes at a temperature of between about 160.degree. C. and 180.degree. C. such as a styrene butadiene rubber compound, is disclosed. The method involves mixing the rubber compound "in situ" with a carbon black and Bis(3-triethoxysilylpropyl)-tetrasulfane at ambient temperature.
Claims33
A process of improving the balance of properties, including the method of increasing reinforcement and reducing rolling resistance of a rubber compound, comprising mixing the rubber compound with a filler consisting essentially of a carbon black and a silane coupling agent prior to the addition of curing agents for a period of between about 10 seconds and 20 minutes at a temperature of between about 160.degree. C. and about 180.degree. C.
A process of improving the balance of properties, including a method of reducing the rolling resistance of a rubber compound comprising:
- (a) mixing the rubber compound with a specified amount of a filler consisting essentially of a carbon black and a silane coupling agent to obtain a masterbatch;
- (b) mechanically working the masterbatch for a period of between about 10 seconds to 20 minutes at a temperature of between about 160.degree. C. and 180.degree. C.;
- (c) allowing the masterbatch to cool to a temperature less than the temperature at which vulcanization would occur upon addition of curatives to the masterbatch;
- and
- (d) mixing the cooled mixture with a predetermined curative and mechanically working the masterbatched mixture until homogeneity is achieved.
A method of reducing the rolling resistance of a styrene butadiene rubber compound comprising:
- (a) mixing the rubber compound with a specified amount of a filler consisting essentially of a carbon black having a surface area, as measured by the nitrogen surface area method (N.sub.2 SA), of between about 5 and 350 m.sup.2 /g, and a specified amount of Bis(3-triethoxysilylpropyl)-tetrasulfane to obtain a mixture;
- (b) mechanically working the mixture for a period of between about 10 seconds to 20 minutes at a temperature of between about 160.degree. C. and 180.degree. C.;
- (c) allowing the worked mixture to cool to a temperature less than the temperature at which vulcanization would occur upon addition of a predetermined masterbatch and curatives;
- and
- (d) mixing the cooled mixture with a predetermined masterbatch and curatives and mechanically working the masterbatched mixture until homogeneity is achieved.
A process of improving the balance of properties, including the method of increasing reinforcement and reducing rolling resistance of a rubber compound comprising the steps of:
- (a) mixing a styrene butadiene rubber compound with a specified amount of a filler consisting essentially of a carbon black having a surface area, as measured by the nitrogen surface area method (N.sub.2 SA), of between about 5 and 350 m.sup.2 /g, and a specified amount of Bis(3-triethoxysilylpropyl)-tetrasulfane to obtain a masterbatch;
- (b) mechanically working the masterbatch for a period of between about 10 seconds to 20 minutes at a temperature of between about 160.degree. C. and 180.degree. C.;
- (c) allowing the worked masterbatch to cool to a temperature less than the temperature at which vulcanization would occur upon addition of a predetermined masterbatch and curatives;
- and
- (d) mixing the cooled masterbatch with predetermined curatives and mechanically working the masterbatched mixture until homogeneity is achieved.
Dependencies are inferred from the claim text.