1380 results about "Conjugated diene" patented technology

The disclosure relates to hydrogen mediated anionically copolymerized conjugated diene vinyl aromatic compositions, copolymers of isoprene and / or butadiene with styrene, and processes and compositions for preparing them.

The purpose is to provide rubber compositions and pneumatic tires which have reduced changes in hardness over time. The present invention relates to a rubber composition containing a copolymer obtained by copolymerizing an aromatic vinyl compound and a conjugated diene compound, the rubber composition having a heat aging resistance index defined by equation (1) of 10 or less.

The purposes of the present invention is: to provide an adhesive composition which has excellent adhesive force and holding properties in addition to excellent low dielectric properties; to provide an adhesive tape which has an adhesive layer that contains the adhesive composition; to provide a resin molded body which is molded from a resin composition that comprises the adhesive composition; to provide a composite structure which comprises the adhesive tape; to provide an automobile member which comprises the resin molded body or the composite structure; and to provide a method for producing a resin molded body using the composite structure.　The present invention provides an adhesive composition which contains: an acrylic copolymer that has a constituent unit derived from a (meth)acrylic acid alkyl ester, a constituent unit derived from an olefin-based polymer that has a polymerizable unsaturated double bond at an end thereof, and a constituent unit derived from a polar functional group-containing monomer; and a styrene-based elastomer that contains at least one substance selected from the group consisting of a block copolymer which has a block derived from a styrene-based monomer and a block derived from a conjugated diene-based monomer, and a hydrogenated product of the block copolymer.

A carboxylic acid-modified nitrile-based copolymer latex includes a carboxylic acid-modified nitrile-based copolymer including: 65.5 wt % to 82.5 wt % of a conjugated diene-based monomer-derived unit, 15 wt % to 30 wt % of an ethylenic unsaturated nitrile-based monomer-derived unit, and 2.5 wt % to 4.5 wt % of an ethylenic unsaturated acid monomer-derived unit, wherein the carboxylic acid-modified nitrile-based copolymer latex satisfies General Formula 1:1.0 mm2 / s≤CV0≤3.0 mm2 / s  [General Formula 1]wherein CV0 represents a capillary viscosity of the carboxylic acid-modified nitrile-based copolymer latex which is measured in a swollen state in a methyl ethyl ketone solvent.

The present invention relates to: a binder for an all-solid-state battery, the binder comprising a main chain crosslinked by a compound including at least two thiol functional groups, wherein the main chain comprises an aromatic vinyl monomer-derived repeating unit and a conjugated diene-based monomer-derived repeating unit; a positive electrode for an all-solid-state battery, the positive electrode comprising the binder for a positive electrode for an all-solid-state battery, a conductive material, a positive electrode active material, and a solid electrolyte; and an all-solid-state battery comprising a positive electrode, a negative electrode, and a solid electrolyte layer disposed between the positive electrode and the negative electrode, wherein the positive electrode includes the positive electrode for an all-solid-state battery.

The invention provides star-shaped functionalized solution polymerized styrene-butadiene rubber and a preparation method thereof, and the preparation method comprises the following steps: S10, in an inert atmosphere, in an organic solvent, taking a conjugated diene monomer as a polymeric monomer, taking a substance obtained by premixing lithium alkyl and a front-end modifier as a functionalized initiator, and carrying out solution polymerization to obtain a polymer precursor; s20, adding an active coupling agent into the polymer precursor to obtain a star polymer with an active star core and a polar functional group at the tail end of each star arm; and S30, adding a functionalization reagent into the star polymer to obtain the star functionalized solution polymerized styrene-butadiene rubber with both chain end functionalization and chain middle functionalization. The front-end modifier and the active coupling agent are introduced, so that an active center is reserved in a star core, and the functionalization reagent is introduced to modify in a chain and enhance the interface bonding force between white carbon black and butadiene styrene rubber, so that the hysteresis loss of tire rubber is reduced, and the tire rubber is endowed with wear resistance, fatigue resistance and wet skid-rolling resistance balance.

The present invention provides a hydrogenated nitrile rubber which is excellent in terms of dispersibility and stability of a conductive material dispersion when an electrode for an electrochemical element is produced, which is excellent in terms of peel strength at an electrode and suppression of active material cracking in an electrode after a cycle test, and which is also excellent in terms of output characteristics of an electrochemical element. A hydrogenated nitrile rubber according to the present invention includes a nitrile group-containing monomer unit, and a conjugated diene monomer unit and / or an alkylene structural unit, has a weight average molecular weight (Mw) within the range from 1,000 to 1,000,000 and an iodine value of 100 mg / 100 mg or less, contains a phenolic antioxidant, and has a calcium (Ca) content from 1 ppm to 2,500 ppm, a ruthenium (Ru) content within the range from 0.5 ppm to 50 ppm, a palladium (Pd) content of 200 ppm or less, a magnesium (Mg) content of 50 ppm or less, and a sodium (Na) content of 300 ppm or less.

A conjugated diene-based polymer of the present invention has a branch number (Bn) measured by viscosity detector-equipped GPC-light scattering measurement of 8 or more, has a change (ΔT) of an oxidation onset temperature caused through application of a thermal load of 11.9° C. or less, and contains an aromatic vinyl compound monomer unit.

Provided is a modified product of a hydrogenated product of a block copolymer that can be added to obtain a resin composition having an excellent balance of mechanical properties such as tensile strength, tensile strain at break, and impact resistance. A modified hydrogenated product of a block copolymer including a polymer block containing a structural unit derived from an aromatic vinyl compound and a polymer block containing a structural unit derived from a conjugated diene compound, in which the conjugated diene compound contains isoprene and a conjugated diene compound other than isoprene; the polymer block has a vinyl bonding amount of 30 mol % or less; the modified hydrogenated product has one, or two or more functional groups selected from an alkoxysilyl group, a carboxy group, an amino group, a hydroxy group, an epoxy group, and an acid anhydride-derived group, and has a peak top intensity of loss tangent of 0.95 or less and a melt flow rate (MFR) of 0.5 g / 10 min or more.

The present invention relates to a modified conjugated diene-based polymer comprising a modification part derived from a modifier, which is useful for modifying a conjugated diene-based polymer, has excellent affinity with a filler and improves the compounding properties of the conjugated diene-based polymer, and a method for preparing the modified conjugated diene-based polymer.

The present invention provides a hydrogenated block copolymer satisfying the following:the hydrogenated block copolymer contains a polymer block (a) containing a vinyl aromatic monomer unit, and a content of the polymer block (a) is 10% by mass or more and 40% by mass or less;the hydrogenated block copolymer contains at least one hydrogenated copolymer block (b) containing a vinyl aromatic monomer unit and a conjugated diene monomer unit, and a content of the vinyl aromatic monomer unit in the hydrogenated copolymer block (b) is 30% by mass or more and 79% by mass or less;the hydrogenated block copolymer has a value of instantaneous hardness of 60 or more, and a value of instantaneous hardness of 65 or less; andthe hydrogenated block copolymer has an MFR value measured under conditions of a temperature of 230° C. and a load of 2.16 kg of 10 or more.

A foam is obtained by foaming a resin composition, which comprises a hydroxyl-terminated hydrogenated styrenic block copolymer of (A-B)n-OH, (B-A)n-OH, A(B-A)n-OH, or B(A-B)n-OH having a hydroxyl group at the terminal; wherein the A block comprises a styrene monomer unit and the B block comprises a conjugated diene monomer unit; wherein the hydroxyl-terminated hydrogenated styrenic block copolymer comprises 10˜60% by weight of the styrene monomer unit; 40 mol % or more of the conjugated diene monomer unit is hydrogenated; and the hydrogenated styrenic block copolymer has a weight average molecular weight of about 30000 to about 200000; the 1,2-vinyl bond content in the conjugated diene monomer unit of the hydroxyl-terminated hydrogenated styrenic block copolymer is in the range of 5 to 60 mole % prior to hydrogenation.

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 hydrogenated copolymer capable of achieving superior processability and fuel-saving performance when formulated into a resin composition, while exhibiting excellent handling properties when used alone.SOLUTION: A hydrogenated copolymer comprises: a hydrogenated block copolymer (X) having at least one polybutadiene block (A) with a vinyl group content of 20 mass% or less; and a polymer (Y) including structural units derived from an aromatic vinyl compound and / or structural units derived from a conjugated diene compound, wherein the ratio of the number average molecular weight of the hydrogenated block copolymer (X) to the number average molecular weight of the polymer (Y) is 2.5 or more and 30 or less.SELECTED DRAWING: None

Provided are a resin composition, a cured product, a prepreg, a metal foil-clad laminate, a resin composite sheet, a printed wiring board, and a semiconductor device. This resin composition comprises an elastomer (A), a thermosetting compound (B), a radical polymerization initiator (C), and a filling material (D), wherein: the elastomer (A) includes a polymer block (a1) containing a radically reactive group-containing styrene compound unit and a conjugated diene compound unit; the thermosetting compound (B) contains a resin (E) having at least two vinylbenzyl groups at the terminal thereof; the content of the filling material (D) is 1-300 parts by mass with respect to 100 parts by mass of the solid content of the resin; and the mass ratio ((A) / (E)) of the elastomer (A) to the resin (E) having at least two vinylbenzyl groups at the terminal thereof is 0.01-1.1.

The present invention relates to a binder for an all-solid-state battery comprising a first polymer in which a chain comprising a first hydrogen-bonding functional group is grafted with a side chain on the main chain of a conjugated diene-based polymer and a second polymer in which a chain comprising a second hydrogen-bonding functional group is grafted with a side chain on the main chain of a conjugated diene-based polymer, wherein the first hydrogen-bonding functional group of the first polymer and the second hydrogen-bonding functional group of the second polymer form hydrogen bonds with each other; a positive electrode for an all-solid-state battery comprising the binder for an all-solid-state battery, a conductive material, a positive electrode active material and a solid electrolyte; and an all-solid-state battery comprising a positive electrode, a negative electrode and a solid electrolyte layer disposed between the positive electrode and the negative electrode, wherein the positive electrode is the positive electrode for an all-solid-state battery.

The invention relates to the field of biomedical polymer materials, and discloses a preparation method of high-viscosity photo-crosslinking sodium hyaluronate hydrogel, which comprises the following steps: dissolving sodium hyaluronate in deionized water / N, N-dimethylformamide to obtain a sodium hyaluronate solution; mixing the sodium hyaluronate solution and the conjugated diene glycidyl ester / N, N-dimethylformamide solution to obtain a pre-formed sodium hyaluronate glue solution; composite antibacterial microspheres and a photoinitiator are added into the preformed sodium hyaluronate glue solution, a photo-crosslinking reaction is performed, conjugated diene glycidyl ester is prepared from raw materials including n-butyllithium, ethyl acetate, 2, 3-dibromo-1-propylene, vinyl magnesium chloride, sodium hydroxide and glycidol, and the conjugated diene glycidyl ester is prepared from raw materials including sodium hyaluronate, sodium hyaluronate and sodium hyaluronate. According to the preparation method disclosed by the invention, the modification reaction and photo-crosslinking time is shortened through the grafting of conjugated diene glycidyl ester, the viscosity of the hydrogel is greatly improved, and the antibacterial property of the hydrogel is improved through the addition of the composite antibacterial microspheres.

The present invention relates to a method for preparing a catalyst composition and a method for preparing a conjugated diene-based polymer using the catalyst composition prepared thereby, the preparation method of the catalyst composition continuously prepares a catalyst composition having improved catalyst activity by pretreating a hydrogen bond type lanthanide rare earth element compound and / or an oligomer type lanthanide rare earth element compound that causes deterioration of catalyst activity.

Provided are a resin composition, a cured product, a prepreg, a metal foil-clad laminate, a resin composite sheet, a printed wiring board, and a semiconductor device. This resin composition contains an elastomer (A), a thermosetting compound (B), and a radical polymerization initiator (C). The elastomer (A) includes a polymer block (a1) including a conjugated diene compound unit and a styrene compound unit having a radical reactive group. The thermosetting compound (B) contains a resin (E) having two or more vinylbenzyl groups at terminals. The content of the elastomer (A) is 0.5-30 parts by mass with respect to 100 parts by mass of the resin solid content in the resin composition. The mass ratio ((A) / (E)) of the elastomer (A) to the resin (E) having two or more vinylbenzyl groups at terminals is 0.01-1.1.

The invention provides a method for preparing dicarboxylate by palladium-double ligand tandem catalysis of carbonylation of 1, 3-conjugated diene, and the method comprises the following steps: adding 1, 3-conjugated diene into a reaction solution containing a palladium cation source, a first ligand monodentate phosphine ligand L1, a second ligand bidentate phosphine ligand L2, an anion source and alcohol, then adding a carbonyl source, and reacting to obtain the dicarboxylate. The dicarboxylic acid ester is obtained. According to the invention, a tandem catalysis strategy is adopted, two ligands of monodentate phosphine and bidentate phosphine are introduced at the same time, a palladium catalysis tandem system is constructed, the dicarboxylate is directly prepared from 1, 3-conjugated diene by a one-pot method, the dosage of the expensive bidentate phosphine ligand is effectively reduced under the same catalysis efficiency, and the use of organic strong acid as an auxiliary agent can be avoided; and the requirement on the material of the reactor is reduced.

The invention belongs to the technical field of organic synthesis, and particularly discloses a method for preparing megastigmatrienone, and the method for preparing megastigmatrienone comprises the following steps: taking 5-bromo-1, 3-pentadiene as an initial raw material, and reacting with trivalent phosphine to prepare phosphine salt; carrying out alkali treatment to obtain a Wittig reagent, and carrying out Wittig reaction on the Wittig reagent and acetyl vinyl acetate to obtain acetate-substituted conjugated tetraene; under the co-catalysis of copper and a large-steric-hindrance ligand, carrying out a Diels-Alder reaction with isobutene to construct a six-membered ring; hydrolyzing to obtain alcohol, and oxidizing to obtain ketone; under the acidic condition, conjugated diene at the tail end is subjected to rearrangement isomerization, and megastigmatrienone is obtained; the raw materials and reagents are simple, cheap and easy to obtain, the reaction steps are short, the yield is high, separation is easy, and the method is suitable for large-scale production.

The present invention provides a resin composition, a cured product, a prepreg, a metal foil-clad laminate, a resin composite sheet, a printed wiring board, and a semiconductor device. The resin composition contains an elastomer (A), a compound (B) represented by formula (GU), and a radical polymerization initiator (C). The elastomer (A) includes a polymer block (a1) containing a conjugated diene compound unit and a styrene compound unit having a radical reactive group. The content of the elastomer (A) is 1-30 parts by mass with respect to 100 parts by mass of the resin solid content. In formula (GU), R1 and R2 are hydrogen atoms or substituents, two R2 are the same as each other, at least one of R1 and R2 is a group including a (meth)allyl group, and R3 and R4 each independently represent a hydrogen atom, an alkyl group, or an aryl group.

To provide rubber formulations that do not require the addition of curing agents, thereby reducing costs and improving sustainability.SOLUTION: Embodiments of the present disclosure are directed to rubber formulations, wherein the formulations include a statistical copolymer. The statistical copolymer includes a polymerized, crosslinkable reaction product derived from a conjugated diene monomer and vinylbenzocyclobutane. The rubber formulation is substantially free of traditional rubber curing agents.SELECTED DRAWING: Figure 1

Inhibitor compositions for abating undesirable emulsion polymerization during processing of hydrocarbon stream laden with reactive vinylic monomers are provided. The polymerization inhibitor compositions include at least a first inhibitor compound having a stable nitroxide radical and a second inhibitor including phenylenediamine. Methods of inhibiting the polymerization of monomers using the compositions of the disclosure are also provided. The methods of inhibiting polymerization of monomers include a step of adding a composition of the disclosure to a process stream. The process stream includes an ethylenically unsaturated monomer that is suspended in the bulk-phase and highly polar solvents as distractive distillation solvents.

The present invention relates to a resin composition containing (A) a thermosetting resin, (B) one or more substances selected from conjugated diene polymers and derivatives thereof and having two or more functional groups containing an ethylenically unsaturated bond, and (C) an inorganic filler surface-treated with a silane coupling agent having a functional group containing an ethylenically unsaturated bond, also provided are a prepreg, a laminate, a resin film, a printed wiring board, and a semiconductor package using the resin composition.

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

The present invention relates to a method for continuously preparing a catalyst composition for preparing a catalyst composition having improved catalyst activity by pretreating a hydrogen-bonded lanthanide rare earth element compound and / or an oligomer type of a lanthanide rare earth element compound, which induce the deterioration of the catalyst activity, and a method for preparing a conjugated diene-based polymer using the catalyst composition prepared thereby.

Method of making a polydiene rubber comprising(i) polymerizing at least one aliphatic conjugated diene monomer, preferably having from 4 to 25 carbon atoms, to produce polymers having reactive polymer chain ends,(ii) reacting at least some of the reactive polymer chain ends with a coupling agent comprising from 2 to 20 unsaturated siloxane units, preferably from 3 to 15 units, more preferably from 3 to 10 units.Also provided are polydiene rubbers obtained by the method, curable compositions comprising the polydiene rubber and composition comprising the cured polydiene rubber.

The invention discloses a nuclear low-sulfur, halogen-free and radiation-resistant ethylene propylene diene monomer and a preparation method thereof, and relates to the technical field of nuclear rubber, ethylene and propylene are used as basic units and are mixed according to a ratio of 1: 2, a third monomer is non-conjugated diene free of sulfur and halogen, a low-sulfur or sulfur-free vulcanization system is selected, and a second monomer is a low-sulfur or sulfur-free vulcanization system; according to the low-sulfur, halogen-free and radiation-resistant ethylene propylene diene monomer rubber, the influence of six elements on the product performance is avoided, the halogen-free additive and filler are selected, harmful substances of the ethylene propylene diene monomer rubber can be effectively reduced through the low-sulfur and halogen-free characteristics, the safety and environmental protection property of the product are improved, and the low-sulfur, halogen-free and radiation-resistant ethylene propylene diene monomer rubber can keep stable performance under extreme conditions and is suitable for industrial production. And the ethylene propylene diene monomer has better processability, and is processed and formed in various modes such as extrusion, injection molding or calendaring, so that the production cost is reduced, and the production efficiency is further improved.

The present invention relates to a conjugated diene polymer, a method for producing a conjugated diene polymer, a conjugated diene polymer composition, and a rubber composition. The purpose of the present invention is to provide a conjugated diene polymer which has extremely excellent processability when made into a sulfide, and which has excellent wear resistance, handling stability, and breaking strength after being made into a sulfide. A conjugated diene-based polymer which is a copolymer of a conjugated diene compound and an aromatic vinyl compound, and which has a Mooney viscosity measured at 100 DEG C of 40-170, a Mooney stress relaxation rate measured at 100 DEG C of 0.239-0.35, and a branching degree (Bn) of 8 or more as determined by a GPC-light scattering measurement method with a viscosity detector, and which contains a nitrogen atom.