445 results about "Conjugated diene" patented technology

A cross-linked product obtained through crosslinking a polymer composition that contains a rubber component, an inorganic filler and a cross-linking agent and that satisfies conditions (a) to (c): (a) the rubber component contains a conjugated diene-based polymer (A) having, when composition ratios (molar ratios) in the conjugated diene-based polymer (A) of structural units represented by formulae (1) to (4) are p, q, r, and s, respectively, a value α represented by formula (i) of 0.80 or more and 0.97 or less;(b) a blending ratio of the conjugated diene-based polymer (A) is 10% by mass or more relative to a total amount of the rubber component; and (c) a blending ratio of the inorganic filler is 40 to 150 parts by mass relative to 100 parts by mass of the rubber component, wherein the Tg of the cross-linked product is −25° C. or lower.

To provide a polymer composition that allows production of a hose exhibiting high oil resistance, and excellent abrasion resistance and heat resistance.SOLUTION: A polymer composition comprises: (A) a conjugated diene-based polymer, and (B) at least one polymer selected from the group consisting of nitrile rubber, hydrogenated nitrile rubber, and ethylene-vinyl acetate copolymer, wherein the rubber component (A) is a conjugated diene-based polymer having a value α, expressed by the following formula (i), in the range of 0.60 to 0.98, where the composition ratios (molar ratios) of the structural units represented by the following formulas (1), (2), (3), and (4) in the polymer are defined as p, q, r, and s respectively. Formula (i): α=(p+(0.5×r)) / (p+q+(0.5×r)+s).SELECTED DRAWING: None

It has been unexpectedly found that certain neodymium catalyst systems can be used to copolymerize isoprene and 1,3-butadiene to produce random isoprene-butadiene copolymer rubbers which are not tapered. These random isoprene-butadiene copolymer rubbers have properties which are beneficial for use in rubber formulations for manufacturing a wide variety of rubber products, such as tires, hoses, conveyor belts, power transmission belts, and shoe soles. These random isoprene-butadiene rubbers are synthesized by copolymerizing (a) isoprene monomer or a substituted isoprene monomer and (b) 1,3-butadiene monomer in the presence of a neodymium catalyst system, wherein the neodymium catalyst system is prepared by (1) reacting a neodymium carboxylate with an organoaluminum compound in the presence of a conjugated diolefin monomer to produce neodymium-aluminum catalyst component, and (2) subsequently reacting the neodymium-aluminum catalyst component with an alkyl aluminum chloride to produce the neodymium catalyst system.

The present disclosure relates to a hydrophilic polymer and a method for preparing the same. The hydrophilic polymer is characterized in that it is a copolymer of a conjugated diene, a monoolefin and a hydrophilic monomer represented by Formula I. In the Formula I, X1, X2 and X3 are each independently selected from hydrogen atoms, or a linear or branched alkyl with 1-4 carbon atoms. At least one of R1, R2 and R3 is hydrophilic group; and the others are each independently selected from hydrogen atoms or, an alkyl or alkoxy with 1-4 carbon atoms.

The present invention relates to a method for preparing a liquid rubber, and relates to a method for preparing a liquid rubber, including performing polymerization reaction of a conjugated diene-based monomer in the presence of an organic solvent and a catalyst composition (S10), wherein the catalyst composition includes a catalyst including a compound represented by the following Formula 1, and a liquid rubber prepared therefrom:wherein R, R1 to R4, and o, p, q and r are described herein.

The present invention provides a thermoplastic resin composition including a first graft copolymer including a conjugated diene-based polymer, an alkyl (meth)acrylate-based monomer, an aromatic vinyl-based monomer, and a vinyl cyanide-based monomer; a second graft copolymer including an alkyl (meth)acrylate-based polymer, an aromatic vinyl-based monomer, a vinyl cyanide-based monomer, and an alkyl (meth)acrylate-based monomer; and a thermoplastic copolymer including an alkyl (meth)acrylate-based monomer, an aromatic vinyl-based monomer, and a vinyl cyanide-based monomer, wherein the first graft copolymer is included in an amount of 5 to 12% by weight, and the weight of the first graft copolymer is less than the weight of the second graft copolymer and at the same time less than the weight of the thermoplastic copolymer, and a molded article manufactured using the thermoplastic resin composition.

The present invention relates to tyre elastomeric compositions and compounds, to tyres for vehicle wheels comprising them which are particularly performant and advantageous for summer use. The tyres of the invention, comprising such compounds especially in the tread band, are characterized by reduced wear and rolling resistance and high grip, both under wet and dry conditions. These advantageous features are obtained by combining certain conjugated diene polymers with a plasticizing admixture with a predetermined content of resins and oils.

The present invention provides a novel compound and a method for preparing same, the compound being a modifying agent useful for modifying rubber, particularly polymers containing repeating units derived from conjugated diene monomers.

The present invention provides a thermoplastic elastomer composition that can form a molded article having excellent feel and transparency and to provide a molded article thereof. A thermoplastic elastomer composition comprising components (A) to (C), listed below,component (A): a propylene-based polymer;component (B): a block copolymer and / or a hydrogenated product thereof, the block copolymer including at least two polymer blocks P and at least one polymer block Q, the at least two polymer blocks P primarily including aromatic vinyl compound units, the at least one polymer block Q primarily including conjugated diene compound units; andcomponent (C): an aryl-group-containing organopolysiloxane.

A laminate containing: a layer (I) mainly composed of an acrylic resin; a layer (II) mainly composed of a polyolefin resin; and an adhesive layer (III) provided between the layer mainly composed of an acrylic resin and the layer mainly composed of a polyolefin resin,wherein the adhesive layer (III) is formed from an adhesive component mainly composed of a hydrogenated conjugated diene block copolymer having two or more polymer blocks selected from the group consisting of a polymer block (A) mainly composed of vinyl aromatic monomer units, a polymer block (B) mainly composed of conjugated diene monomer units, and a polymer block (C) having vinyl aromatic monomer units and conjugated diene monomer units, in which unsaturated bonds in conjugated diene monomer units are hydrogenated, andthe hydrogenated conjugated diene block copolymer satisfies predetermined requirements.

This invention discloses an ethylene copolymer containing ethylene structural units derived from ethylene and conjugated diene structures derived from conjugated dienes. This ethylene copolymer is formed by contacting ethylene and the conjugated diene with a transition metal complex of Formula I. In the ethylene copolymer according to this invention, the content of ethylene structural units can vary over a relatively wide range while maintaining a high content of cis-1,4-structural units.

There is provided an alkali dispersible-type hot melt pressure-sensitive adhesive, comprising:(A) a thermoplastic block copolymer that is a copolymer of vinyl aromatic hydrocarbons and conjugated diene compounds,(B) a metallocene olefin polymer,(C) a tackifying resin, and(D) at least one selected from the group consisting of fatty acids and derivatives thereof.

Provided is a polymer composition capable of producing a tire product having high grip and low rolling resistance. The polymer composition according to the present invention is characterized by comprising: a rubber component comprising a conjugated diene polymer (A-1); and at least one substance selected from the group consisting of hydrides of raw material component polymers containing olefins having an alicyclic structure having a five-membered ring, and hydrides of raw material component polymers containing C9 fractions containing aromatic olefins and olefins having an alicyclic structure. The conjugated diene polymer (A-1) contains a structural unit derived from a conjugated diene compound and a structural unit derived from an aromatic vinyl compound. The content of the structural unit derived from the aromatic vinyl compound is 5-60 mass% with respect to the total amount of the structural unit derived from the conjugated diene compound and the structural unit derived from the aromatic vinyl compound, and the content of the structural unit derived from the aromatic vinyl compound is 5-60 mass% with respect to the total amount of the structural unit derived from the conjugated diene compound and the structural unit derived from the aromatic vinyl compound. The content of discontinuous aromatic vinyl compound single chains in the aromatic vinyl compound is less than 40% by mass, and the content of aromatic vinyl compound long chains in which 8 or more aromatic vinyl compound units are linked is 10% by mass or less.

A method including polymerizing a conjugated diene-based monomer, or the conjugated diene-based monomer and an aromatic vinyl-based monomer in a hydrocarbon solvent to prepare an active polymer; and reacting or coupling the active polymer with a modifier to prepare a modified conjugated diene-based polymer. Polymerization is initiated in the presence of a first polymerization initiator, and the polymerization reaction is performed by injecting a second polymerization initiator in at least one installment at a point where a polymerization conversion ratio is from 50% to 95%.

To provide a polymer excellent in crack growth resistance.SOLUTION: Provided is a modified conjugated diene-based polymer, the polymer having at least a conjugated diene unit, and having three or more modified groups represented by -SO3M1 / n (M is a metal atom, and n is an integer selected from 1 to 4 in terms of the valence that the M can take as a cation) in one molecule of the polymer.SELECTED DRAWING: None

This modified conjugated diene polymer satisfies conditions (i) to (v) described below. Condition (i): The Mooney viscosity measured at 100ºC is 100 or more. Condition (ii): The glass transition temperature is -95°C to -45°C. Condition (iii): The content of silicon atoms is 170 ppm or more relative to the total amount of the modified conjugated diene polymer, and the mass ratio of the content of silicon atoms to the content of nitrogen atoms is 3 or more. Condition (iv): The modification rate is 70 mass% or more. Condition (v): The degree of branching (Bn) as determined by a GPC-light scattering measurement method with a viscosity detector is 6 or more.

To provide a modified elastomer composition, a crosslinked elastomer composition, and a molded article that have high ductility, excellent moldability (specifically, extrusion moldability), and high temperature resistance. [Solution] A modified elastomer composition comprising: (A) ethylene-α-olefin copolymer rubber, (B) propylene resin, (C) at least one of styrene-conjugated diene block copolymer and hydrogenated styrene-conjugated diene block copolymer, and (D) an unsaturated silane compound, and grafted with (E) a peroxide, wherein when the total of components (A) to (C) is 100 parts by mass, component (A) is 30 parts by mass or more and 75 parts by mass or less, component (B) is 14 parts by mass or more and 60 parts by mass or less, and the mass ratio of the content of component (C) to the content of component (B) (component (C) / component (B)) is 0.25 or more and 1.00 or less.

The application belongs to the technical field of catalytic synthesis, and particularly relates to application of a Lewis acid-base pair in catalyzing polymerization of functionalizable monomers. Common polymerization methods have poor controllability for polymerization of monomers containing polyene groups, alkyne groups and conjugated diene groups, and the molecular weight of the obtained polymer is uncontrollable at low monomer conversion, and the molecular weight distribution is wide, and crosslinking occurs at high monomer conversion. The application utilizes a specific Lewis acid-base pair, and by adjusting the electronic effect and steric hindering effect of the Lewis acid and the Lewis base, active controllable polymerization of the functionalizable monomers can be catalyzed, and a polymer with a clear structure and containing functionalizable sites is obtained, the molecular weight is controllable, the molecular weight distribution is narrow, the end group structure is controllable, the position and density of the functionalizable sites are conveniently adjusted, an efficient platform is provided for post-modification preparation of functional high molecular materials, and functional high molecular materials are prepared by combining click reaction.

This invention provides a star-shaped functionalized solution-polymerized styrene-butadiene rubber and its preparation method. The preparation method includes the following steps: S10, under an inert atmosphere, in an organic solvent, using a conjugated diene monomer as the polymerization monomer and a substance obtained by premixing alkyl lithium with a front-end modifier as the functionalization initiator, solution polymerization is carried out to obtain a polymer precursor; S20, an active coupling agent is added to the polymer precursor to obtain a star-shaped polymer with an active core and polar functional groups at the ends of each star arm; S30, a functionalizing agent is added to the star-shaped polymer to obtain a star-shaped functionalized solution-polymerized styrene-butadiene rubber with both end-chain and mid-chain functionalization. This invention, by introducing a front-end modifier and an active coupling agent, allows the star core to retain its active center, and introduces a functionalizing agent for mid-chain modification, enhancing the interfacial bonding force between silica and styrene-butadiene rubber, thereby reducing the hysteresis loss of tire rubber and imparting it with wear resistance, fatigue resistance, and wet skid-rolling resistance balance.

A polymerization catalyst composition contains a rare earth element carboxylate, a phosphate ester represented by the following general formula (1):[Formula 1]O═P(OR)3  (1)(wherein Rs are each independently an alkyl group having 5 to 20 carbon atoms), and water.

Disclosed is a thermoplastic resin composition, a method of preparing the same, and a molded article including the same. Also disclosed is a thermoplastic resin composition prepared by adding a recycled vinyl cyanide compound-conjugated diene rubber-aromatic vinyl compound copolymer and a recycled polycarbonate resin to a composition including a vinyl cyanide compound-conjugated diene rubber-aromatic vinyl compound graft copolymer, an α-methyl styrene-vinyl cyanide compound-aromatic vinyl compound copolymer, and an aromatic vinyl compound-vinyl cyanide compound copolymer according to a predetermined composition ratio.

The invention relates to the field of battery materials, in particular to a binder and a preparation method thereof, a negative plate and a lithium ion battery. According to the preparation method of the adhesive provided by the invention, a monomer 1 (an itaconic acid-based monomer and / or a fumaric acid-based monomer) is adopted as a main flexible monomer and is copolymerized with conjugated diene, a monomer 2 (a carboxylic acid-based monomer shown in a formula (2)) and a cross-linking monomer, and meanwhile, an amino polyoxyethylene ether nonionic emulsifier is introduced, so that the adhesive is prepared. And by means of a pre-emulsification process, monomer ratio regulation and control, pre-lithiation realized by using lithium alkali in the later stage and the like, a low swelling rate is realized, so that the bonding strength of the material and high conductivity of electrode electrons and ions are ensured, and excellent low-temperature performance is also realized.

Disclosed is an imine group-containing novel compound which is useful as a polymer modifier, a modified conjugated diene-based polymer including a functional group derived from the novel compound and having excellent affinity with a filler, a method for preparing the polymer, and a rubber composition including the polymer, and provides an imine group-containing compound represented by Formula 1, a modified conjugated diene-based polymer including a functional group derived therefrom, and a method for preparing the polymer.

The invention discloses a preparation method of nitrile rubber, which comprises the following steps: (1) adding water, a vinyl nitrile monomer and an ionizable initiator into a polymerization kettle, stirring, heating, and cooling after the reaction is finished to obtain a reaction compound with an emulsification effect; (2) in the polymerization reaction, adding water, a cosolvent and the reaction compound obtained in the step (1), introducing nitrogen for replacement, then adding a deoxidant, a chain transfer agent with a surface activity function, conjugated diene and a vinyl nitrile monomer, heating, adding an ionizable initiator, and measuring the conversion rate of the reaction monomer in each period of time; and when the conversion rate is greater than 70%, adding a terminator and an anti-aging agent, stirring, degassing, adding a coagulant, flushing and drying to obtain the nitrile rubber. According to the preparation method, soap-free polymerization of nitrile rubber can be realized, the complexity of a post-treatment process is reduced, the environmental friendliness and economic benefits are improved, and the problem that the cleanliness of a product is difficult to improve is solved.

This invention provides a high-carboxylic acid content carboxylated styrene-butadiene latex and its synthesis method, belonging to the field of polymer emulsion preparation. The method uses fatty amine polyoxyethylene ether oxide, long-chain alkyl quaternary ammonium salt, or long-chain alkyl quaternary ammonium base as co-emulsifiers, and involves carboxylic acid monomer treatment and emulsion polymerization steps. The surfactants fatty amine polyoxyethylene ether oxide, long-chain alkyl quaternary ammonium salt, or long-chain alkyl quaternary ammonium base act as co-emulsifiers in the emulsion polymerization system, interacting with carboxyl-containing monomers to increase the binding degree between the carboxylic acid monomers and other monomers such as conjugated dienes and styrene. This significantly increases the carboxylic acid group content in the latex polymer and improves the stability of the reaction system. The carboxylated styrene-butadiene latex prepared by this invention has a bound carboxylic acid content of 9%-15%. This invention effectively solves the technical problems of low carboxylic acid content and poor emulsion stability in traditional carboxylated styrene-butadiene latexes.

The application discloses a conjugated diene ionic liquid, characterized by having a cation shown in formula I: wherein R, R0, R 1 , R 2 , R 3 are independently selected from one of H, C1-C6 alkyl, phenyl; R a , R b , R c , R d , R a , R b , R c , R d are independently selected from one of H, C1-C6 alkyl; x, y, z are integers from 0 to 9. The ionic liquid has high polymerization reactivity.

To provide an adhesive sheet having such a form that an adhesive layer is laminated on a fiber substrate, and achieving both hot melt coating property and excellent adhesive performance.SOLUTION: An adhesive sheet including a fiber substrate and an adhesive layer laminated on the fiber substrate is such that: an adhesive forming the adhesive layer contains a block copolymer of a monovinyl-substituted aromatic compound and a conjugated diene compound, a tackifier resin and a plasticizer; the adhesive has a shear viscosity at 195°C of 1,300 Pa s or more and 3,000 Pa s or less; the fiber substrate has a basis weight of 30 g / m2 or less, and a thickness of 60 μm or less; and an organic residual solvent content in the adhesive layer is less than 1,000 ppm.SELECTED DRAWING: Figure 1

The application discloses a itaconate / conjugated diene / terpene multivariate copolymer type bio-based rubber and a vulcanized rubber and a preparation method thereof, relates to the technical field of rubber synthesis, and the number average molecular weight of the bio-based rubber is 50-100 million, preferably 100-800 million; the molecular weight distribution is 1.5-10.0, preferably 2.0-5.0. The itaconate monomer adopted in the application is derived from a bulk bio-based chemical, itaconic acid, the terpene monomer adopted is also derived from a biomass resource, and the application has a wide application in industrial production; the itaconate / conjugated diene / terpene multivariate copolymer is prepared by using an oxidation-reduction emulsion polymerization technology, is environment-friendly and has low energy consumption, is simple in process and is suitable for industrialized production. The itaconate / conjugated diene / terpene multivariate copolymer type bio-based rubber has high bio-based content and excellent mechanical properties and comprehensive performance in tire application.

This application discloses an electrolyte solute, its preparation method, and its application. The electrolyte solute comprises an olefinic cyclohexene carboxylic acid compound obtained by the reaction of conjugated diene carboxylic acids. The conjugated diene carboxylic acid includes at least one compound having the structure shown in Formula III: wherein X and Y are each independently selected from H, -RO-COOH, substituted or unsubstituted C1-10 saturated hydrocarbon groups, etc., and at least one of X and Y is -RO-COOH; RO represents a directly bonded or C1-10 saturated hydrocarbon group. The electrolyte solute of this application, comprising an olefinic cyclohexene carboxylic acid compound with unsaturated hydrocarbon functional groups, can both improve the flash voltage of the electrolyte and maintain low viscosity and high conductivity.

The present invention relates to a conjugated diene-based polymer having high processability and excellent compounding properties, a preparation method thereof and a rubber composition including same, and provides a neodymium-catalyzed conjugated diene-based polymer satisfying all conditions of (a) to (c), a preparation method thereof and a rubber composition including same.