734 results about "Conjugated diene" patented technology

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 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.

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.

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 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.

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

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.

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.

To provide a modified vinyl aromatic copolymer that is useful as a modifier for conjugated diene-based copolymers (such as SBR), demonstrates excellent filler dispersibility, and services as a crosslinked rubber with superior mechanical strength and wear resistance.SOLUTION: A polymer comprising structural units derived from one or more monomers selected from the group consisting of monovinyl aromatic compounds (a) and conjugated diene compounds (b), wherein the polymer contains structural units derived from multifunctional vinyl aromatic compounds (c) and the polymer has terminal ends modified by a modifier having at least one functional group selected from the group consisting of amino groups, alkoxysilyl groups, and hydroxyl groups. Additionally, the polymer has condensation structural units formed by condensation with a multifunctional condensate containing alkoxysilyl groups, and the polymer has an average functional group number per molecule of 3.0 to 30.0 and a number average molecular weight (Mn) of 500 to 30,000.SELECTED DRAWING: None

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 relates to the technical field of catalysts, and particularly relates to a rare earth neodecanoate catalyst for polymerization, its preparation method and application. The rare earth neodecanoate catalyst comprises the following components: neodymium neodecanoate, a halogen-containing compound, an alcohol compound, a conjugated diene and an auxiliary agent. The auxiliary agent comprises a mixture of triphenyl(methyl)-tetrakis(pentafluorophenyl)borate and phenyl-dimethylamino-tetraphenylborate, and the molar ratio of the two is 2-4:1. The polybutadiene product prepared by the rare earth catalyst of the present invention has a high cis structure content, molecular weight and yield, and at the same time has a narrow molecular weight distribution, the raw materials are easy to obtain, and the cost is low.

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.

The present invention relates to a double-sided adhesive tape for affixing a polishing pad, comprising a base material, a first adhesive layer positioned on one surface of the base material, and a second adhesive layer positioned on the other surface of the base material, the first pressure-sensitive adhesive layer contains a base polymer, a tackifying resin (T1) that does not contain a hydroxyl group or has a hydroxyl value of less than 20 mgKOH / g, and a tackifying resin (T2) that has a hydroxyl value of 20-120 mgKOH / g, the base polymer containing a block copolymer (A) of a monovinyl-substituted aromatic compound and a conjugated diene compound, and the first pressure-sensitive adhesive layer contains a polymer having a block copolymer (A) of a monovinyl-substituted aromatic compound and a conjugated diene compound. The content of the base polymer is 40.0% by mass or more and less than 53.0% by mass, and the content of the tackifier resin (T1) per 100 parts by mass of the base polymer in the first adhesive layer is 50 parts by mass or more and 100 parts by mass or less, and the content of the tackifier resin (T2) per 100 parts by mass of the base polymer is 40 parts by mass or more and 80 parts by mass or less.

A support material with excellent heat resistance, water solubility, and buildability is provided. The support material contains an acid-modified polyvinyl alcohol resin (A) with a modification degree of 0.01 to 10 mol %, and a block copolymer (B) having a polymer block (b1) of an aromatic vinyl compound, and at least one of a polymer block (b2) of a conjugated diene compound or isobutylene and a hydrogenation block (b3) resulting from hydrogeneration of the conjugated diene compound or isobutylene.

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%.