Rubber composition and method for producing rubber composition
AssigneeBridgestone Corporation
InventorsTakeshi Shiono, Takumi Toda, Satoshi Horie
Life of this patent
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Abstract
The present invention provides a rubber composition comprising, as blended, a rubber component (A), an amino acid derivative (B) and a filler containing an inorganic filler (C), and further containing, as incorporated therein, at least one selected from sulfur and a sulfur compound. The vulcanization rate of the rubber composition is accelerated and the low-heat-generation property thereof is excellent.
Claims5
A rubber composition comprising, as blended, a rubber component (A), an amino acid derivative (B) and a filler containing an inorganic filler (C), and further containing, as incorporated therein, at least one selected from sulfur and a sulfur compound, in which the amino acid derivative (B) is represented by the following formula (Ic):
- in the formula, X represents a divalent hydrocarbon group having a linear alkylene group and having from 1 to 10 carbon atoms, Y and Z each independently represent a single bond or an alkylene group having from 1 to 10 carbon atoms, Rh is selected from a hydrogen atom, an aliphatic hydrocarbon group, an alicyclic hydrocarbon group, an aromatic hydrocarbon group and an alkali metal, Rj and Rk are a hydrogen atom, the —COO moiety may form a salt with an amine, the —NRjRk moiety may form a salt with an acid, however, when Rh is a hydrogen atom, the compound must form a salt, and in case where the compound does not form a salt, Rh is not a hydrogen atom.
A method for producing a rubber composition containing a rubber component (A), an amino acid derivative (B) and a filler containing an inorganic filler (C), which comprises:
- a first kneading stage of kneading the rubber component (A), the amino acid derivative (B) and all or a part of the inorganic filler (C), and
- a final kneading stage of, after the first kneading stage, adding thereto at least one selected from sulfur and a sulfur compound and kneading them, in which the amino acid derivative (B) is represented by the following formula (Ic):
- in the formula, X represents a divalent hydrocarbon group having a linear alkylene group and having from 1 to 10 carbon atoms, Y and Z each independently represent a single bond or an alkylene group having from 1 to 10 carbon atoms, Rh is selected from a hydrogen atom, an aliphatic hydrocarbon group, an alicyclic hydrocarbon group, an aromatic hydrocarbon group and an alkali metal, Rj and Rk are a hydrogen atom, the —COO moiety may form a salt with an amine, the —NRjRk moiety may form a salt with an acid, however, when Rh is a hydrogen atom, the compound must form a salt, and in case where the compound does not form a salt, Rh is not a hydrogen atom.
Dependencies are inferred from the claim text.