摘要:
A rubber composition for use in tire treads comprises a diene rubber including not less than 40% by weight of a modified conjugated diene polymer rubber and, per 100 parts by weight of the diene rubber, from 66 to 110 parts by weight of a filler. The filler comprises not less than 50% by weight of silica. The modified conjugated diene polymer rubber is obtained by copolymerizing a conjugated diene monomer unit and an aromatic vinyl monomer unit in a hydrocarbon solvent using an organic active metal compound as an initiator. A resulting active conjugated diene polymer chain thereof has a terminal modified group, obtained by reacting at least one type of compound having a functional group that is reactable with the active terminal of the polymer chain. Moreover, the terminal modified group has a functional group that interacts with the silica.
摘要:
A rubber composition comprises a diene rubber including not less than 25% by weight of a modified conjugated diene polymer rubber and, per 100 parts by weight of the diene rubber, from 25 to 65 parts by weight of a filler, the filler comprising not less than 50% by weight of silica. The silica has a DBP absorption number of 190 to 250 ml/100 g, an N2SA of 194 to 225 m/g, and a CTAB of 185 to 215 m2/g. A ratio of the N2SA to the CTAB is from 0.9 to 1.4. The modified conjugated diene polymer rubber has a terminal modified group including a functional group that interacts with the silica. In the modified conjugated diene polymer rubber, aromatic vinyl unit content is from 38% to 48% by weight, vinyl unit content is from 20% to 35%, and weight-average molecular weight is from 600,000 to 1,000,000.
摘要:
A rubber composition for use in tire treads comprises a diene rubber including not less than 40% by weight of a modified conjugated diene polymer rubber and, per 100 parts by weight of the diene rubber, from 66 to 110 parts by weight of a filler. The filler comprises not less than 50% by weight of silica. The modified conjugated diene polymer rubber is obtained by copolymerizing a conjugated diene monomer unit and an aromatic vinyl monomer unit in a hydrocarbon solvent using an organic active metal compound as an initiator. A resulting active conjugated diene polymer chain thereof has a terminal modified group, obtained by reacting at least one type of compound having a functional group that is reactable with the active terminal of the polymer chain. Moreover, the terminal modified group has a functional group that interacts with the silica.
摘要:
A rubber composition comprises a diene rubber including not less than 25% by weight of a modified conjugated diene polymer rubber and, per 100 parts by weight of the diene rubber, from 25 to 65 parts by weight of a filler, the filler comprising not less than 50% by weight of silica. The silica has a DBP absorption number of 190 to 250 ml/100 g, an N2SA of 194 to 225 m/g, and a CTAB of 185 to 215 m2/g. A ratio of the N2SA to the CTAB is from 0.9 to 1.4. The modified conjugated diene polymer rubber has a terminal modified group including a functional group that interacts with the silica. In the modified conjugated diene polymer rubber, aromatic vinyl unit content is from 38% to 48% by weight, vinyl unit content is from 20% to 35%, and weight-average molecular weight is from 600,000 to 1,000,000.
摘要:
A rubber composition comprises a diene rubber including not less than 30% by weight of a modified conjugated diene polymer rubber and, per 100 parts by weight of the diene rubber, from 1 to 25 parts by weight of a tackifying resin, and from 25 to 80 parts by weight of a filler comprising not less than 50% by weight of silica. The modified conjugated diene polymer rubber has a terminal modified group comprising a functional group that interacts with silica. In the modified conjugated diene polymer rubber, aromatic vinyl unit content is from 38% to 48% by weight, vinyl unit content is from 20% to 35%, weight-average molecular weight is from 600,000 to 1,000,000, and glass transition temperature is from −22 to −32° C. A glass transition temperature of the tackifying resin is from 50 to 110° C. higher than the glass transition temperature of the modified conjugated diene polymer rubber.
摘要:
A rubber composition comprises a diene rubber including not less than 30% by weight of a modified conjugated diene polymer rubber and, per 100 parts by weight of the diene rubber, from 1 to 25 parts by weight of a tackifying resin, and from 25 to 80 parts by weight of a filler comprising not less than 50% by weight of silica. The modified conjugated diene polymer rubber has a terminal modified group comprising a functional group that interacts with silica. In the modified conjugated diene polymer rubber, aromatic vinyl unit content is from 38% to 48% by weight, vinyl unit content is from 20% to 35%, weight-average molecular weight is from 600,000 to 1,000,000, and glass transition temperature is from −22 to −32° C. A glass transition temperature of the tackifying resin is from 50 to 110° C. higher than the glass transition temperature of the modified conjugated diene polymer rubber.
摘要:
Disclosed is a sulfur-containing conjugated diolefin copolymer rubber composed of a conjugated diolefin and an aromatic vinyl compound, wherein (1) the content of sulfur bound to the rubber is 0.01 mmol % or more, (2) the content of the aromatic vinyl compound polymerization unit is not less than 5 wt % and less than 45 wt % relative to the amount of the copolymer rubber, and (3) the content of a vinyl bond (a 1,2-bond) in the conjugated diolefin polymerization unit is 30 mol % or more relative to the amount of the conjugated diolefin polymerization unit. In the copolymerization between the conjugated diolefin and the aromatic vinyl compound, a sulfur-containing polymerization terminator is used to terminate the reaction of the copolymerization.
摘要:
Disclosed is a sulfur-containing conjugated diolefin copolymer rubber composed of a conjugated diolefin and an aromatic vinyl compound, wherein (1) the content of sulfur bound to the rubber is 0.01 mmol % or more, (2) the content of the aromatic vinyl compound polymerization unit is not less than 5 wt % and less than 45 wt % relative to the amount of the copolymer rubber, and (3) the content of a vinyl bond (a 1,2-bond) in the conjugated diolefin polymerization unit is 30 mol % or more relative to the amount of the conjugated diolefin polymerization unit. In the the copolymerization between the conjugated diolefin and the aromatic vinyl compound, a specific sulfur-containing polymerization terminator is used to terminate the reaction of the copolymerization. The sulfur-containing conjugated diolefin copolymer rubber has good processability and a good balance among wear resistance, fracture properties and low hysteresis loss.
摘要:
A rubber composition obtained by compounding thereinto a rubber component containing 0.5 to 100% by weight of a modified conjugated diene-based polymer having a fullerene bonded thereto in the molecule and having a weight average molecular weight of 50,000 or more excellent processability, superior balance of modulus and heat buildup, excellent cold flowability and superior tan δ balance.
摘要:
A thermoplastic elastomer composition containing a dynamically cross-linked composition of(A) 10 to 70 parts by weight of a thermoplastic resin,(B) 30 to 90 parts by weight of a modified butyl rubber composition containing a modified butyl rubber modified reacting, to butyl rubber, (a) a compound containing, in the molecule thereof, a nitroxide free radical stable at an ordinary temperature in the presence of oxygen, and (c) a bifunctional or higher functional radical polymerizable monomer, and(C) 0.01 to 15 parts by weight of a cross-linking agent.