923 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 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.

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.

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 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.

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 invention belongs to the technical field of organic synthesis, and discloses a synthesis method of polysubstituted 1, 3-conjugated diene. The synthesis method of the polysubstituted 1, 3-conjugated diene comprises the following steps: in a protective atmosphere, with an organic solvent as a reaction medium, carrying out a reaction on a carboxylic acid compound, isonitrile and propargyl ester under the action of a weakly alkaline salt, a catalyst and a ligand to obtain the polysubstituted 1, 3-conjugated diene. The structure of the polysubstituted 1, 3-conjugated diene is shown in the specification. The method is simple, the raw materials are cheap and easy to obtain, the polysubstituted 1, 3-conjugated diene compound with rich and diversified structures can be constructed in one step, the yield is high, the substrate applicability is wide, and the atom economy is high. # imgabs0 #

This invention relates to a method of reducing abnormal combustion events in a hydrogen fueled internal combustion engine (HICE) during operation of the engine. The method includes the steps of: a) providing to the HICE a lubricating oil composition including or resulting from the admixing of: i) a base oil having a KV100 of less than or equal to 12 cSt and included at greater than 50 wt.% of the composition and comprising a Group I base oil, a Group II base oil, a Group III base oil, a Group IV base oil, or combinations thereof; ii) at least one olefin polymer at from 1.0 to 20 wt.% based upon the total weight of the lubricating oil composition, wherein the at least one olefin polymer comprises a partially or fully saturated olefin homopolymer or copolymer backbone having an Mn of 10,000 g / mol or more (GPC-PS), and wherein the homopolymer or copolymer backbone is derived from monomers selected from the group consisting of C2 to C30 linear alpha olefins, C4 to C20 conjugated dienes, and combinations thereof; iii) at least one overbased metal containing detergent with a Total Base Number (KOH / g) greater than or equal to 9 and less than or equal to 500 and included at a treat level to deliver between 100 to 5000 ppm by weight of total metal and between 0.15 wt. % to 8.0 wt. % of total soap to the composition; and iv) the lubricating oil composition having a total sulfated ash of less than or equal to 2.5 wt.%, a total phosphorous level of less than or equal to 0.120 wt.%, and a SAE viscosity grade of 25W-X, 20W-X, 15W-X, 10W-X, 5W-X or 0W-X, where X represents any one of 8, 12, 16, 20, 30, 40, 50 or 60; b) providing a fuel comprising hydrogen to the HICE; and c) combusting the fuel in the HICE. Also provided are lubricating oil compositions and concentrates for use in a HICE to reduce the propensity for abnormal combustion events.

A thermoplastic composition includes specific amounts of a poly (phenylene ether), an impact modifier (including a hydrogenated block copolymer of an alkenyl arene and a conjugated diene), an organophosphate flame retardant, a flame retardant synergist (including phosphazene), and optionally, tricalcium phosphate. The thermoplastic composition can be used to make various articles, particularly suitable for thin wall applications.

The present invention relates to a highly branched and high-molecular-weight modified conjugated diene-based polymer, a method for preparing same, and a rubber composition comprising same, and provides a modified conjugated diene-based polymer comprising a conjugated diene-based monomer-derived unit and a modified part derived from a compound represented by chemical formula 1, a method for preparing same, and a rubber composition comprising same.

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 invention provides nitrile rubber, a binder composition for a positive electrode of an energy storage device and application of the binder composition. The nitrile rubber contains 20 to 80 wt% of an alpha, beta-ethylenically unsaturated nitrile monomer unit, 20 to 80 wt% of a conjugated diene monomer unit, and 0 to 30 wt% of a cationic monomer unit, and the iodine value of the nitrile rubber is 55 mg / 100 mg or more and 150 mg / 100 mg or less. The binder composition contains the nitrile rubber, and the content of the nitrile rubber is 70 wt% or above based on 100 wt% of the solid content of the binder composition. When the binder composition is used for the energy storage device, the prepared positive electrode has excellent flexibility and penetration resistance, and the energy storage device can exert excellent high-temperature storage characteristics.

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.

A functionalized diene polymer having at least one first functional group and at least one second functional group, wherein the first functional group is selected from end groups, side groups, and combinations thereof, the second functional group is an end group, the first functional group comprises at least one unit derived from a functionalized monomer represented by formula (1) (wherein R1, R2, and R3 are selected from hydrogen and methyl, provided that at least one of R1, R2, and R3 is hydrogen, preferably R1, R2, and R3 are all hydrogen, n is 1, 2, 3, 4, or 5, each R4 is independently selected from aliphatic residues or arylaliphatic residues having 3 to 30 carbon atoms, and R4 contains at least one tertiary amine group when n = 1, and at least one of the residues R4 contains at least one tertiary alkylamine group when n = 2 to 5); or (ii) the first functional group is obtained by using a polymerization initiator of the general formula: N(R1)(R2)(R3M) (wherein R1 and R2 are the same or different from each other and are selected from linear or branched saturated alkyls, R3 is a saturated, linear or branched alkyl carbanion, and M is an alkali cation), the second functional group is an end group, and comprises at least one group selected from -COOX; -OX; -SX (wherein X represents hydrogen or a cation), a plurality thereof, and combinations thereof. Also provided are a method for producing the polymer, an article obtained from the polymer, and a method for producing an article with the polymer, wherein the functionalized diene polymer is a homopolymer or copolymer of a conjugated diene, and the conjugated diene is selected from the group consisting of butadiene, isoprene, isoprene, 1,3-pentadiene, 2,3-dimethylbutadiene, 1-phenyl-1,3-butadiene, 1,3-hexadiene, preferably butadiene.

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.

Disclosed herein are EPDM-diene copolymers that have a low molecular weight and are liquid at room temperature. In a specific embodiment, the method of making the copolymer includes: adding a solvent to a reactor; adding a propylene and a catalyst mixture to the solvent in the reactor to make a first reaction mixture, where the catalyst mixture includes: one or more catalysts, one or more cocatalysts, and one or more catalyst reactivators; contacting an ethylene to the first reaction mixture to make a second reaction mixture; and contacting a vinyl norbornene to the second reaction mixture to make a copolymer, where the copolymer has a molecular weight from about 2,500 g / mol to about 1,000,000 g / mol, and where the copolymer has a viscosity from about 1,000 cP to about 2,500,000 cP at 100° C.

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.