2105 results about "Diene" patented technology

The invention relates to a rubber blend, to a sulfur-crosslinkable rubber mixture comprising the rubber blend and to a vehicle tire comprising such a rubber mixture.The rubber blend comprisesat least one solution-polymerized diene polymer A of high molecular weight andat least one solution-polymerized polymer B of low molecular weight,wherein at least one of polymers A and B has been functionalized at the chain end and / or along the polymer chain and / or at a coupling site with at least one group selected from epoxy groups, hydroxyl groups, carboxyl groups, silane sulfide groups, amino groups, siloxane groups, organosilicon groups, phthalocyanine groups and amino group-containing alkoxysilyl groups.

The invention provides soft environment-friendly automobile interior leather, which comprises a polyolefin base material layer and a surface coating, the polyolefin base material layer comprises: a component (A): a mixture composed of 10-90 parts by weight of an ethylene copolymer elastomer and 10-90 parts by weight of ethylene-propylene-diene monomer, the sum of the weight parts of the ethylene copolymer elastomer and the ethylene-propylene-diene monomer being 100; and a component (B): 0-5 parts by weight of an assistant cross-linking agent. The automotive trim leather provided by the invention is soft, anti-aging and low-volatility, has good tensile strength, low-temperature folding resistance and flexibility, and is wide in processing window, simple in process and low in cost.

The invention discloses a single-phase refrigerant medium and a preparation method thereof.The preparation method comprises the following preparation steps that S1, in an inert gas atmosphere, a dimethyl cyclosiloxane mixed ring body and 1, 1, 3, 3-tetramethyldisiloxane react under the action of a second catalyst, and after impurities are removed, a hydrogen-terminated polysiloxane intermediate is obtained; s2, in an inert gas atmosphere, adding the end hydrogen-containing polysiloxane intermediate and a first catalyst into a solvent, then adding isolated diene for reaction, adding alpha-olefin after the reaction is performed for a period of time, and performing low-temperature removal to obtain the single-phase refrigerant medium. The single-phase refrigerant medium has the advantages of being good in fluidity, resistant to high and low temperature, good in insulativity, good in thermal conductivity, high in safe usability and the like, does not contain fluorocarbon compounds, is environmentally friendly, is simple in preparation method and is suitable for industrial production.

The invention relates to the technical field of building construction, and discloses an outer wall facade deformation joint hidden type curtain wall sealing structure and a construction method. Comprising positioning parts which are fixedly arranged on the two sides of a deformation joint; ePDM (ethylene-propylene-diene monomer) telescopic rubber strips are arranged between the two positioning components. The EPDM telescopic adhesive tape can completely cover the deformation joint; the EPDM telescopic adhesive tape, the chemical bolt, the keel and the aluminum plate are fixed to the deformation joint, the deformation joint cover plate and the deformation joint cover plate lock catch are arranged to hide the deformation joint, and therefore the appearance effect is achieved, meanwhile, the problems of cracks, damage and the like of a building in the later period are avoided, the service life of the building is prolonged, water seepage is reduced, and the construction quality is improved. Attractiveness is improved, and later maintenance cost is saved to a certain extent; the structure can avoid the influence of expansion and contraction of materials, release of structural stress and earthquake deformation on the structure, does not influence the appearance effect of the building, and is suitable for industrial and civil building facade deformation joint construction.

A rubber coating for a radiofrequency identification device for a tyre characterized in that it comprises: (a) 100 phr of at least one diene-based elastomer; (b) at least one chemical according to formula (1) wherein the chemical comprises in its structure at least the structure of the 2,2′-methylenediphenol, and wherein the 2,2′-methylenediphenol may be substituted in ortho, para, meta position or any combination thereof with an aliphatic, linear or branched, hydrocarbon chain comprising from 1 to 10 C atoms, or may be polymerized in ortho, para, meta position or any combination thereof with one or more additional alkylphenol units. A radiofrequency identification (RFID) module for a tyre comprising a radiofrequency identification device surrounded by a rubber coating, a tyre or a tyre retread comprising such radiofrequency identification module, and use of a rubber coating for surrounding a radiofrequency identification device.

An improved Type C air conditioning hose is provided that meets or exceeds SAE J2064 and J3062 requirements, offers good flexibility and fracture resistance, and exhibits improved permeation ratings for refrigerants including R134a and R1234yf. The multilayer type C barrier air conditioning hose includes an inner elastomeric tube layer capable of direct bonding to plastic without an intervening adhesive. The inner elastomeric layer is prepared from a first elastomeric composition comprising a blend of an ethylene propylene diene terpolymer rubber (EPDM) and a chloroprene rubber (CR), phenylenedimaleimide, and a maleated compound.

The present invention relates to an elastomeric laminate comprising at least two adjacent layers, wherein: the rubber composition constituting the first layer is based on 20 phr to 100 phr of at least one copolymer comprising ethylene units and 1,3-diene units of formula CH2=CR-CH=CH2, the ethylene units in the copolymer representing more than 50 mol% of the copolymer monomer units, and the symbol R represents a hydrocarbon chain having 3 to 20 carbon atoms, 0 phr to 80 phr of at least one diene elastomer having a diene unit weight concentration greater than 50%, 10 phr to 100 phr of a plasticizing system comprising at least one plasticizing resin having a glass transition temperature higher than 20°C and / or at least one plasticizer which is liquid at 23°C, and a reinforcing filler, and a crosslinking system; the rubber composition constituting the second layer is based on a diene elastomer having a diene unit weight concentration greater than 50% and a crosslinking system. The present invention also relates to a rubber article, in particular a pneumatic or non-pneumatic tire, comprising such a laminate.

The invention discloses a diene lactone hydrolase mutant and an application thereof. The protein provided by the invention is a diene lactone hydrolase mutant, the 184th amino acid residue on an amino acid sequence shown as SEQ ID NO: 2 is mutated, and the amino acid residues at other positions are not changed, so that the protein with PBAT hydrolase activity is obtained; the PmDLH mutant T184H is obtained by mutating wild type PmDLH by utilizing a structural analysis and site-directed mutagenesis technology, and compared with the wild type PmDLH, the PmDLH mutant T184H has the advantages that the problem of low enzyme activity of the wild type PmDLH is solved, the activity of the PmDLH in degrading polyester plastic PBAT is effectively improved, the degradation effect of the PmDLH is improved, and the industrial application prospect is good.

The invention discloses a compression-resistant and torsion-resistant energy storage cable and a preparation method thereof, and relates to the technical field of energy storage cables. The compression-resistant and torsion-resistant energy storage cable sequentially comprises a cable core, an insulating layer, a lubricating shielding layer and a compression-resistant outer protective layer from inside to outside, wherein the compression-resistant outer protective layer at least comprises the following raw materials in parts by mass: 70-90 parts of high-density polyethylene; 10 to 20 parts of low density polyethylene; 20 to 30 parts of elastic particles; 30 to 40 parts of an ethylene-vinyl acetate copolymer; 30 to 40 parts of a flame retardant; 5 to 10 parts of maleic anhydride grafted poly ethylene propylene diene monomer; 0.1 to 1 part of an antioxidant; 1-2 parts of a lubricant; 0.1 to 1 part of a cross-linking agent; and 0.1-1 part of an assistant cross-linking agent. The anti-compression and anti-torsion energy storage cable prepared by the invention has excellent mechanical performance and electrical performance, and the anti-compression and anti-torsion performance of the energy storage cable is improved.

The present invention relates to a tire for vehicle wheels which comprises at least one structural component comprising at least one reinforcing element constituted by an elongate element coated with, or embedded in, a vulcanised elastomeric compound obtained by vulcanising an elastomeric composition comprising per 100 phr of diene elastomeric polymer: (i) a predispersion of a diene elastomeric polymer and lignin, in an amount to provide the elastomeric composition with 100 to 10 phr of diene elastomeric polymer and a quantity of lignin equal to or greater than 20 phr, (ii) from 0 to 90 phr of a diene elastomeric polymer, (iii) at least 30 phr of a carbon black reinforcing filler, (iv) optionally, a reinforcing resin comprising at least 0.5 phr of a methylene acceptor compound associated with at least 0.2 phr of a methylene donor compound, (v) from 0.1 to 10 phr of carbon nanotubes, and (vi) from 0.1 to 12 phr of at least one vulcanising agent, wherein at least 50 phr of said diene elastomeric polymer is constituted by natural or synthetic isoprene rubber.

A rubber composition is based on at least an elastomer matrix predominantly comprising a highly saturated diene elastomer, a reinforcing filler, a vulcanization system, and a plasticizing system comprising a hydrocarbon resin having a Tg between −40° C. and 20° C. and a number-average molar mass (Mn) of less than or equal to 800 g / mol, the highly saturated diene elastomer being a copolymer of ethylene and of at least one 1,3-diene in which the ethylene units represent at least 50 mol % of the monomer units of the copolymer.

The present invention discloses a class of imide ring-containing dimercapto monomers, imide ring-containing diene monomers and preparation methods thereof, a light-responsive polyimide material and preparation method thereof, and relates to the technical field of light-driven materials. The present invention uses a dibasic acid anhydride as the basic monomer unit, and prepares a dimercapto monomer containing an imide structure and a monomer containing an imide ring-containing diene monomer by reacting with a monothiol compound and a monoalkyne compound, respectively. The two monomers are subjected to a thiol-alkyne click reaction to finally obtain a high molecular weight polyimide. The polyimide obtained by the present invention has excellent solubility, high tensile strength, good heat resistance and light transmittance; the polyimide material is placed under an ultraviolet lamp for uneven photocrosslinking to quickly obtain a light driver with excellent reversible driving performance.

The disclosure relates to the purification and treatment of oil produced from the liquefaction of waste polymer like for instance the pyrolysis of waste plastics via the polymerization of dienes prior to further treatments.

The disclosure relates to the purification and treatment of oil produced from the liquefaction of waste polymer like for instance the pyrolysis of waste plastics via the polymerization of dienes prior to further treatments.

The invention discloses a rubber composition for tire crown components, specifically related to the field of rubber, including the following raw materials by weight: 100 parts of diene rubber, 0.3-3 parts of hydrazide compounds, 40-160 parts of reinforcing fillers, 0-1.5 parts of low rolling resistance modifiers, 2-18 parts of silane coupling agents, vulcanization accelerators, vulcanizing agents, antioxidants, vulcanization activators, processing aids, resins and plasticizers. Hydrazide compounds can improve the compatibility between rubbers, and after complexing with zinc oxide, stabilize sulfur cross-linking bonds, thereby improving fatigue crack resistance, delaying crack initiation, reducing crack propagation rate, and improving physical property retention after aging. Low rolling resistance modifiers can react with the double bonds of synthetic diene rubbers in a trans-Diels-Alder reaction, which has the effect of reducing rolling resistance. Hydrazide compounds and low rolling resistance modifiers are used together, and the rubber composition has the performance of anti-fatigue, anti-crack growth, anti-collapse and block falling, low hysteresis loss, low heat generation, and low rolling resistance.

The invention discloses a method for extracting a p-phenylenediamine antioxidant in a liquid sample and application of the p-phenylenediamine antioxidant. The p-phenylenediamine antioxidant comprises N-(1, 2, 4-trimethyl-1, 3-pentanediol) the organic solvent is at least one of N, N '-diphenyl-1, 3-dimethyl butyl)-N'-phenyl p-phenylenediamine, N-cyclohexyl-N '-phenyl p-phenylenediamine, N-isopropyl-N'-phenyl-p-phenylenediamine, N, N '-diphenyl-1, 4-phenylenediamine, N, N'-di-2-naphthyl p-phenylenediamine and 2-((4-methylpentane-2-yl) amino)-5-(phenyl amino) cyclohex-2, 5-diene-1, 4-diketone. According to the method, liquid-liquid extraction which is simple and efficient to operate, low in cost and good in repeatability is adopted as a sample pretreatment method, and is combined with an isotope label method and an ultra-high performance liquid chromatography-tandem mass spectrometry technology, so that separation and qualitative and quantitative detection of six p-phenylenediamine antioxidants and quinone derivatives in a sample are realized; meanwhile, the sensitivity is high, the quantity of isotope internal standards is small, the solvent loss is small, and the actual detection requirement is met.

The disclosure relates to the purification and treatment of oil produced from the liquefaction of waste polymer like for instance the pyrolysis of waste plastic via the polymerization of dienes prior to further treatments.

The invention relates to a method for synthesizing tetrasubstituted ‑1,3‑enedicarboxylic acid, and discloses a method for synthesizing tetrasubstituted ‑1,3‑enedicarboxylic acid. The method comprises the following steps: using 1,3‑enyne and iodide as raw materials, potassium formate as a formate source, DABCO as a hydrogen transfer catalyst, Ir(bpy)2(dtbpy)PF6 as a photocatalyst, and cesium carbonate as a base, introducing CO2 under normal pressure, and obtaining an enedicarboxylic acid compound with an excellent to good yield under room temperature and visible light irradiation for 24 hours. The method has mild reaction conditions, good regioselectivity, and good functional group tolerance, and makes up for many deficiencies of the prior art.

The invention relates to the technical field of mercury removal, in particular to a compound heavy metal chelating agent and a preparation method and application thereof. The preparation method of the compound heavy metal chelating agent comprises the following steps: mixing N-dithio carboxyl-amino phenyl formic acid, a cyclohexyl-3, 5-diene-1, 2-dicarboxylic acid solution, a propionic acid solution and a sodium hydroxide solution, stirring until complete dissolution and standing, then completing evaporative crystallization, and separating and purifying the separated chelating agent. The N-dithio carboxyl-amino phenyl formic acid, the cyclohexyl-3, 5-diene-1, 2-dicarboxylic acid, the propionic acid and a proper amount of sodium hydroxide are mixed to form a compound reagent, the chelating absorption effect on the heavy metal Hg in the natural gas wastewater is better, and the formed chelate is very stable and not easy to decompose.

The present invention relates to the technical field of rubber products. Disclosed are a tire sidewall rubber composition, a preparation method therefor, and a tire, for solving the problem in the prior art of affecting the sense organ of a human body and even harming the health of the human body by order and VOC molecules released by a tire. The tire sidewall rubber composition comprises coordination polymerization diene rubber, a nano material of a porous structure, and an inorganic reinforcing filler; the addition amount of said nano material is 2-10% of the mass of the coordination polymerization diene rubber, and the mass of the inorganic reinforcing filler is 35-75% of the mass of the coordination polymerization diene rubber. A specific technological process comprises: adding the coordination polymerization diene rubber, the inorganic reinforcing filler, said nano material and other auxiliary agents into an internal mixer for first-stage mixing to obtain first-stage master batch; and adding the first-stage master batch and a vulcanizing agent into the internal mixer for second-stage mixing, and discharging the rubber. The method is simple in process, and said nano material is added into the tire sidewall rubber composition, thereby reducing the odor of the rubber material and the volatilization of the VOC molecules.

The invention discloses an ablation-resistant EPDM (Ethylene-Propylene-Diene Monomer) thermal insulation material and a preparation method thereof, and belongs to the field of thermal insulation materials, the thermal insulation material is prepared from the following components in parts by mass: 70 to 80 parts of EPDM rubber, 20 to 30 parts of liquid EPDM, 15 to 20 parts of silicon dioxide, 10 to 40 parts of high-temperature-resistant filler, 10 to 15 parts of flame retardant, 10 to 15 parts of heat-resistant fiber and 3 to 5 parts of cross-linking agent. A third monomer of the ethylene propylene diene monomer is ethylidene norbornene, and the ethylene content is 50-60%. The raw materials are placed between double rollers to be mixed, and a mixed sheet is obtained; and performing vulcanization molding on the mixed sheet to obtain the ablation-resistant ethylene-propylene-diene monomer thermal insulation material. The content of the heat-resistant fibers is increased, the aramid fibers are subjected to in-situ carbonization to form a carbonized layer structure frame, and meanwhile, the content of SiO2 is regulated and controlled, so that the content of SiO2 is matched with the increase of the fibers, and the ablation resistance of the thermal insulation material is improved.

The present invention relates to a method of producing a cord for a power transmission belt, the method including: a first treatment step of treating an untreated yarn of a cord for a power transmission belt with a first treatment agent including a resin component (A) to obtain a first treated yarn; and a second treatment step of treating the first treated yarn with a second treatment agent including a condensate (B1) of resorcin and formaldehyde, an unmodified latex (B2), and an acid-modified diene-based polymer (B3) to obtain a second treated yarn.

The invention provides a compression-molded light transparent high-heat wear-resistant rubber and plastic outsole and a preparation method thereof, and the compression-molded light transparent high-heat wear-resistant rubber and plastic outsole is prepared from the following materials in parts by mass: 50-60 parts of high-hardness thermoplastic resin; 10 to 20 parts of polydiene rubber; 20 to 30 parts of mixed polyurethane; 3-5 parts of a heat conduction auxiliary agent; 0.5-1 part of an anti-aging agent; 0.1 to 0.3 part of an ultraviolet absorbent; 0.1 to 0.3 part of a lubricant; and 0.3 to 0.5 part of a cross-linking agent. The limited components are internally mixed by an internal mixer and then are subjected to flat-plate mould pressing vulcanization to obtain the light transparent high-heat wear-resistant rubber and plastic outsole which is formed by mould pressing. According to the light transparent high-heat wear-resistant rubber and plastic outsole, nano spherical aluminum oxide is added as a heat-conducting additive, so that light scattering caused by refractive index difference between filler and a matrix and particle aggregation is effectively reduced, and the original transparent texture of the material is maintained to the greatest extent while the material is endowed with a heat-conducting function; the sole is especially suitable for high-strength sports shoes such as basketballs, racing running shoes and the like which have harsh requirements on sole performance.

The EPDM composition is a rubber composition obtained by blending carbon black, a plasticizer and a cross-linking agent in an ethylene-propylene-diene ternary copolymer rubber, the plasticizer is a polyol ester, the polyol ester is a reaction product of a neopentyl polyol and a monocarboxylic acid, and the amount of the plasticizer in the composition is 5-22 wt%. The EPDM composition does not damage the mixing property and the processability, and the hardness change of the obtained cross-linked product after a thermal aging test is the same as that of the cross-linked product under the condition of matching the same parts of alpha-olefin oligomer, and is greatly improved compared with that of the cross-linked product under the condition of matching aliphatic dibasic acid ester.

The invention provides an EPDM (Ethylene-Propylene-Diene Monomer) rubber material and a preparation method and application thereof, and relates to the technical field of rubber materials. The EPDM rubber material is prepared from the following raw materials in parts by mass: 100 to 200 parts of raw EPDM rubber, 50 to 80 parts of composite modified white carbon black, 8 to 15 parts of a plasticizer, 0.5 to 2.0 parts of an anti-aging agent, 1.0 to 3.0 parts of a dispersing agent, 3.0 to 7.0 parts of a vulcanizing agent and 0.5 to 3.0 parts of an assistant cross-linking agent. The EPDM rubber material provided by the invention has good compatibility in a mixed solution of a refrigerant and refrigerating machine oil, has excellent mechanical properties, and can be applied to EPDM rubber products of an automobile air conditioning refrigeration system.

The present disclosure provides a catalyst system capable of selectively hydrogenating (2, 3) / (4, 5) and (2, 3) / (5, 6) dienones with hydrogen. In particular, the present disclosure provides catalysts capable of providing high selectivity for reduction even in the absence of catalyst poisons such as pyridine, pyrazine, quinoline, and quinoxaline.

The invention provides a graphene dispersion liquid, a preparation method thereof and a water-based paint, aiming at solving the problem that the performance of graphene is influenced due to insufficient dispersion force and poor dispersion stability when a conventional dispersing agent is used for dispersing graphene in water in the prior art. The graphene dispersion liquid comprises a first solvent and modified graphene oxide, and the modified graphene oxide is dispersed in the first solvent; the modified graphene oxide comprises an inner core and a shell layer, the inner core is graphene oxide, the shell layer is a diene modified polymer, and the diene modified polymer is grafted on the inner core; the diene modified polymer comprises one or more of a cyclopentadiene modified polymer and a furan modified polymer. According to the graphene dispersion liquid provided by the invention, the diene modified polymer is grafted on the graphene oxide, and the graphene oxide is uniformly dispersed in the solvent by utilizing the hydrophilicity of the diene modified polymer, so that the graphene dispersion liquid with stable dispersion performance can be obtained.

The invention provides high-flame-retardant high-temperature-resistant automotive interior leather which comprises a polyolefin base material layer and a surface coating, the polyolefin base material layer comprises a mixture composed of 10-90 parts by weight of ethylene copolymer elastomer and 10-90 parts by weight of ethylene-propylene-diene monomer, and the sum of the parts by weight of the ethylene copolymer elastomer and the ethylene-propylene-diene monomer is 100; and 0.1-5 parts by weight of an assistant cross-linking agent, wherein the assistant cross-linking agent comprises a flame-retardant assistant cross-linking agent. The automotive trim leather provided by the invention has good mechanical properties, temperature resistance, high flame retardance, aging resistance, environmental protection and the like, and is simple in process and low in cost.

A process for converting whole crudes and other heavy hydrocarbon streams to produce ethylene. The process includes feeding a hydroprocessed medium boiling fraction, a hydroprocessed residue fraction, or both, and a light boiling fraction to a steam cracker and recovering a light fraction. The light fraction is fed to a first separator and recovering a C1-C3 stream and a mixed C4 and C4+ stream, comprising isoolefins, olefins, and dienes and feeding the mixed C4 and C4+ stream to a second separator and recovering a mixed C4 stream comprising isoolefins, olefins, and a C4+ stream. A portion of the mixed C4 stream is dimerized in a dimerization unit to produce a dimerized product stream, hydrogenated in a total hydrogenation system, producing a hydrogenated dimer product stream, and cracking the hydrogenated dimer product stream in a thermal cracking reactor system, producing one or more of hydrogen, methane, ethylene, propylene, n-butenes, and isobutene.

The invention discloses an impact-resistant glass fiber composite material, which is prepared from the following components in parts by weight: 60 to 75 parts of polypropylene, 15 to 25 parts of long glass fiber, 5 to 10 parts of glass fiber chopped strand mat, 7 to 15 parts of high heat-resistant polymer, 0.3 to 0.7 part of antioxidant, 0.8 to 1.2 parts of flame retardant, 4 to 6 parts of elastomer POE (Polyolefin Elastomer), 1.5 to 2.5 parts of rubber blend EPDM (Ethylene-Propylene-Diene Monomer), 0.8 to 1.2 parts of flexibilizer MBS and 0.8 to 1.2 parts of carbon fiber. The invention relates to the technical field of high polymer materials, in particular to a high polymer composite material. The high polymer composite material is prepared from, by weight, 20-30 parts of high polymer, 0.3-0.7 part of nano filler nano silicon and 0.5-8 parts of compound crystallization nucleating agent. The antioxidant prevents oxidation and aging of the material and prolongs the service life; the flame retardant improves the flame retardant property of the material and increases the safety; the nano filler nano silicon improves the mechanical property and wear resistance of the material; the compound crystallization nucleating agent improves the crystallization property of the material, and further improves the strength and heat resistance of the material.