The invention relates to a sulfur-crosslinkable rubber mixture, in particular for treads of vehicle tires, and to a vehicle tire. The rubber mixture contains at least the following components: at least one diene rubber and 10 to 200 phr of at least one silicic acid and 2 to 20 phf of at least one silane having general empirical formula I) [(R 1 ) 3 Si—X] m S n (R 2 ) 2-m , wherein the residues R 1 within a molecule can be the same or different and are alkoxy groups having 1 to 10 carbon atoms or cyclic dialkoxy groups having 2 to 10 carbon atoms or cycloalkoxy groups having 4 to 10 carbon atoms or phenoxy groups or aryl groups having 6 to 20 carbon atoms or alkyl groups having 1 to 10 carbon atoms or alkenyl groups having 2 to 20 carbon atoms or aralkyl groups having 7 to 20 carbon atoms or halides and wherein X is a polar organic group containing urea and wherein m assumes the value 1 or 2 and wherein n is an integer from 1 to 8 and wherein R 2 is a hydrogen atom or an acyl group having 1 to 20 carbon atoms.

Sulfur-crosslinkable rubber mixture and vehicle tire

The invention relates to low-rolling-resistance modified asphalt and a preparation method thereof. The modified asphalt is prepared from a binding agent, an elastomer commixture, a multi-wall carbon nanotube, a high molecular material internal lubricant, a rubber crosslinking agent and a stannous chloride vulcanization auxiliary agent. The preparation method comprises the following steps: 1) firstly, crushing solution-polymerized butadiene styrene rubber into coarse grains; after mixing the coarse grains with a thermoplastic elastomer according to an equal ratio, uniformly stirring; then crushing a uniform mixture to obtain a subdivided polymer elastomer; 2) mixing the subdivided polymer elastomer in step (1), the hydroxyl multi-wall carbon nanotube and the high molecular lubricant according to a ratio; then uniformly stirring at a high speed to obtain an asphalt modifier with a low loss factor; 3) heating the binding agent to certain temperature, and then adding the asphalt modifier with the low loss factor; grinding until no particles exist; finally, adding the crosslinking agent and the vulcanization auxiliary agent according to an equal ratio, and stirring to obtain the low-rolling-resistance modified asphalt. According to the low-rolling-resistance modified asphalt provided by the invention, the low rolling resistance performance of the asphalt is greatly improved under the condition that the complex modulus is high.

Low-rolling-resistance modified asphalt and preparation method thereof

The invention discloses modified asphalt and a preparation method thereof. The modified asphalt disclosed by the invention is prepared from the following raw material components in parts by weight: 100 parts of catalytic slurry oil, 60 to 100 parts of residual oil, 3 to 10 parts of a delay agent, 0.1 to 1 part of an oxidant and 3 to 10 parts of a chemical modifier, wherein the chemical modifier isa methanesulfonic acid solution of phosphorus pentoxide. According to the modified asphalt and the preparation method thereof, the catalytic slurry oil can be directly used as a production raw material of asphalt, and procedures such as atmosphere-vacuum distillation or solvent deasphalting and the like do not need to be carried out on the catalytic slurry oil; after the catalytic slurry oil is blended and modified, the modified asphalt for roads is manufactured; therefore, the production process is greatly simplified, and the production cost is reduced.

Modified asphalt and preparation method thereof

The present invention relates to the field of polymers and discloses a modified diene polymer and a preparation method thereof and a rubber composition and vulcanized rubber. The modified diene polymer contains at least one conjugated diene structural unit, wherein the modified diene polymer further contains a graft modification unit which is shown as Formula (I) and bonded to the conjugated dienestructural unit, wherein, R1 is a C3 to C30 linear or branched alkylene group. The modified diene rubber provided by the present invention has a relatively low gel content, and when the modified diene rubber is used as a part of the rubber composition or whole rubber base glue, the modified diene rubber can significantly improve the dynamic mechanical properties of the rubber composition.-S-R1-COOH is as shown in the Formula (I).

Modified diene polymer and preparation method thereof and rubber composition and vulcanized rubber

The present invention relates to a method for preparing a modified conjugated diene-based polymer. More specifically, the present invention provides a method for preparing a modified conjugated diene-based polymer, the method comprising the steps of: (S1) polymerizing a conjugated diene-based monomer in the presence of an organic metal compound in a hydrocarbon solvent, to prepare an organic metal-conjugated active polymer; and (S2) reacting or coupling the active polymer prepared in step (S1) and a modifier, step (S1) being consecutively performed in two units of polymerization reactors, wherein the polymerization conversion rate in a first reactor of the polymerization reactors is 50% or lower.

Method for preparing modified conjugated diene-based polymer

The invention discloses terpolymer rubber with medium/high side group content and a preparation method and applications thereof. The invention relates to a method which uses a bistetrahydrofuran compound as the structural modifier to synthesize monovinylarene/conjugated diene 1/conjugated diene 2 terpolymer rubber through solution polymerization, the monovinylarene/conjugated diene 1/conjugated diene 2 terpolymer rubber synthesized by the method and products based on the copolymer rubber, such as tires. The copolymer rubber synthesized by the method has good wet-skid resistance and low rolling resistance.

Terpolymer rubber with medium/high side group content and preparation method and applications thereof

The present invention provides a functionalized diolefin polymer preparation method, which comprises that a diolefin polymer containing at least a conjugated diolefin structure unit contacts a modifier, a stabilizer and an initiator in an inert atmosphere, such that the modifier is chemically bonded to the diolefin polymer through the contacting condition, wherein the average molecular weight of the diolefin polymer is 50000-1000000, the content of the conjugated diolefin structure unit having the double bond on the side chain is 15-85 wt% by adopting the weight of the conjugated diolefin structure unit as the reference, the modifier is at least one selected from mercaptosilane having a structure represented by a formula (I), a substance concurrently containing a mercapto group and a hydroxyl group in the molecule, and a substance concurrently containing a mercapto group and a carboxyl group, and the stabilizer is one or a plurality of materials selected from an arylamine type antioxidant, a hindered phenol type antioxidant and a phosphite antioxidant. According to the present invention, with the method, the conversion rate of the modifier is substantially and completely achieved, and the relation between the wet skid resistance and the rolling resistance can be effectively improved. The formula (I) is defined in the specification.

Functionalized elastomer, modified asphalt, and functionalized elastomer preparation method

The invention provides a modified alkadiene polymer, a preparation method of the modified alkadiene polymer and application of the modified alkadiene polymer as base rubber. A molecular chain of the modified alkadiene polymer comprises a monovinyl aromatic hydrocarbon structure unit, a conjugated alkadiene structure unit and a silane coupling agent shown in a formula (I), wherein the number-average molecular weight of the modified alkadiene polymer is 50000-1000,000; R1-R4 is C1-C20 linear chain or branched chain alkyl or heteroatom-containing C1-C20 linear chain or branched chain alkyl; the heteroatoms are selected from one or more of halogen, oxygen, sulphur, silicon and phosphorus. The modified alkadiene polymer can be used for effectively balancing the relation between wet-skid resistance and rolling resistance and can also be used for improving unpleasant odor generated by using the silane coupling agent in the rubber mixing process. The formula (I) is as shown in the description.

Modified alkadiene polymer as well as preparation method and application thereof

The invention discloses a block copolymer and a block copolymer preparation method. Structural units in the block copolymer are connected in a PB1-SB-PB2 mode, wherein the PB1 block is a block formed by conjugated diene; the SB block is a random copolymerization block formed by conjugated diene and monovinylarene; the PB2 block is a block formed by conjugated diene; and by taking gross of the block copolymer as reference, the content of vinyl as a lateral group in the PB1 block is 2-6.5% by weight, the content of vinyl as a lateral group in the SB block is 9-55% by weight, and the content of vinyl as a lateral group in the PB2 block is 1-3.5% by weight. The invention also discloses a composition formed by coupling of the block copolymer and vulcanized rubber formed by the block copolymer. A material formed by the block copolymer, particularly when the block copolymer is styrene-butadiene block copolymer, has relatively good damping performance within a wider temperature range, and meanwhile, has better mechanical property.

Block copolymer, block copolymer composition, vulcanized rubber, application of block copolymer, block copolymer composition and vulcanized rubber and block copolymer preparation method

The invention provides a modified olefin polymer, a preparation method of the modified olefin polymer, an olefin polymer prepared by the method, and application of the modified olefin polymer serving as rubber base glue. The molecular chain of the modified modified olefin polymer contains at least one monovinylarene structural unit, at least two conjugated diene structural units, and a silane coupling agent structural unit as shown in a formula (I) in the specification; the average molecular weight of the modified olefin polymer is fifty thousand to 1 million; R1-R4 are linear or branched-chain alkyl with C1-C20 or heteroatom-containing linear or branched-chain alkyl with C1-C20; the heteroatom is selected from one or a plurality of halogen, oxygen, sulphur, silicon and phosphorus. By virtue of the modified olefin polymer, the relationship between wet-skid resistance and rolling resistance can be balanced, and moreover, the unpleasant smell caused by the silane coupling agent used in rubber mixing can be reduced.

Modified olefin polymer as well as preparation method and application thereof

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