摘要:
A method for producing an alkoxysilyl group-containing conjugated diolefin (co)polymer rubber by polymerizing a conjugated diolefin or a conjugated diolefin and an aromatic vinyl compound in a hydrocarbon solvent by anionic polymerization using as an initiator at least one metal compound selected from an organic alkali metal compound and an organic alkali earth metal compound, and then allowing an alkoxysilane-based compound to react, wherein after the alkoxysilane-based compound has been allowed to react, an alkaline compound is added at the time of desolvation, and treatment is conducted at a pH of 8 to 12.
摘要:
Disclosed are a conjugated diolefin (co) polymer rubber formed from either a conjugated diolefin or a conjugated diolefin and an aromatic vinyl compound, wherein the (co) polymer rubber has a primary amino group and an alkoxysilyl group which are bonded to a (co) polymer chain; a process for producing the same; a rubber composition; a composite; and a tire. The (co) polymer rubber has satisfactory processability, and can give an automotive tire tread having a balance among wear resistance, failure characteristics, low hysteresis loss and wet-skid characteristics.
摘要:
There is obtained a rubber composition excellent in processability of unvulcanized compounded rubber, excellent in wear resistance and wet skid resistance of vulcanized rubber, low in rolling resistance, and suitable for tire applications, particularly for tire tread applications in which importance is given to low fuel consumption and safety.A rubber composition mainly comprising (I) 0.5 to 35% by weight of a conjugated diene-based (co)polymer rubber having an amino group and an alkoxysilyl group on a polymer chain and having a weight average molecular weight of 1,000 to 90,000, and (II) 99.5 to 65% by weight of a conjugated diene-based (co)polymer rubber having a weight average molecular weight of 100,000 to 2,000,000 (with the proviso that (I)+(II)=100% by weight).
摘要:
There is obtained a rubber composition excellent in processability of unvulcanized compounded rubber, excellent in wear resistance and wet skid resistance of vulcanized rubber, low in rolling resistance, and suitable for tire applications, particularly for tire tread applications in which importance is given to low fuel consumption and safety. A rubber composition mainly comprising (I) 0.5 to 35% by weight of a conjugated diene-based (co)polymer rubber having an amino group and an alkoxysilyl group on a polymer chain and having a weight average molecular weight of 1,000 to 90,000, and (II) 99.5 to 65% by weight of a conjugated diene-based (co)polymer rubber having a weight average molecular weight of 100,000 to 2,000,000 (with the proviso that (I)+(II)=100% by weight).
摘要:
A conjugated diolefin (co)polymer rubber is provided which is small in variations in the Mooney viscosity of the resulting rubber, and in which later changes in the Mooney viscosity with the elapse of time can also be restrained. A conjugated diolefin (co)polymer rubber which is a conjugated diolefin (co)polymer rubber obtained from a conjugated diolefin or a conjugated diolefin and an aromatic vinyl compound, having an alkoxysilyl group and desolvated under alkaline conditions.
摘要:
A process for producing a conjugated diene copolymer rubber which comprises initiating a copolymerization reaction in a reaction system containing a first conjugated diene compound and a first aromatic vinyl compound and completing the reaction, adding a first polyfunctional monomer to the reaction system, optionally further adding a second conjugated diene compound and a second aromatic vinyl compound, and further conducting copolymerization reaction, and adding a modifier to the reaction system to react the modifier with the copolymer. A rubber composition having excellent processability, exhibiting sufficient hardness even after vulcanization, and possessing reduced rolling resistance can be obtained.
摘要:
An objective of the present invention is to provide rubber composition and method for producing the same capable of giving a vulcanized rubber which has an excellent processability and a sufficient wearing resistance and which is useful for a tire. A rubber composition in the invention is obtained by the following step of preparing a first rubber formulation [P1] by kneading a formulation (A1) comprising a rubber component containing a conjugated diene-based rubber and a silica, preparing a second rubber formulation [P2] by kneading a formulation (B1) comprising a mixed material containing a silane coupling agent and the first rubber formulation [P1], and kneading a formulation (C) comprising the second rubber formulation [P2], a zinc oxide and a vulcanizing agent. Such conjugated diene-based rubber is preferably one having at least one selected from the group consisting of an alkoxysilyl, an amino, a hydroxyl and an epoxy groups.
摘要:
The object of the present invention is to provide a rubber composition with excellent workability, which gives vulcanized products with high wet skid resistance, low rolling resistance and high abrasion resistance, and a tire with those excellent properties. The rubber composition comprising a diene-based rubber (a), silica (b) and a compatibilizer (c). Said compatibilizer (c) is at least one selected from among (I) Aminosilane compounds; (II) Epoxy group-containing compounds; and (III)(IV) Compounds which have an amino group or a polymerizable unsaturated bond, together with a hydroxyl group, an epoxy group, an ether bond, a carboxyl group, an ester bond or a polymerizable unsaturated bond in the molecule.
摘要:
An oil extended rubber comprising 100 parts by weight of (A) an amino group-containing copolymer rubber of a conjugated diolefin and an aromatic vinyl compound which contains bonded amino groups in the amount of 0.0025-0.20 mmol/g polymer, and 10-100 parts by weight of (B) an extensible oil. Carbon black, silica, a mixture of carbon black and silica, or a carbon-silica dual-phase-filler can be homogeneously dispersed in the oil extended rubber. Vulcanized products obtained by vulcanizing the rubber exhibits well-balanced improved properties such as wet skid properties, low hysteresis loss properties, abrasion resistance, and breaking strength, and are useful as a tread material for low fuel consumption tires, large tires, and high performance tires.
摘要:
A rubber composition comprising: (A) a rubber component including 30 to 100 mass % of diene rubber having at least one functional group selected from the group consisting of an amino group, an alkoxysilyl group, an epoxy group, a hydroxyl group, and a carboxyl group in an amount of 0.01 to 5.0 mmol per 100 g of the diene rubber; (B) silica in an amount of 5 to 130 parts by mass per 100 parts by mass of the rubber component; and (C) an aliphatic component having at least one functional group selected from the group consisting of a carboxyl group, a hydroxyl group, an amino group, and an epoxy group in an amount of 3 to 15 parts by mass per 100 parts by mass of the silica. The rubber composition and a tire using the rubber composition exhibit excellent scorching properties before vulcanization and exhibit excellent rolling resistance and wet skid properties after vulcanization.