1201 results about "Cyclopentadiene" patented technology

The invention discloses a method and a device for synthesizing a metal precursor organic carbonyl cobalt compound, which are particularly suitable for synthesizing and preparing dicarbonyl cyclopentadienyl cobalt and (3, 3-dimethyl-1-butyne) hexacarbonyl cobalt. The method comprises the following steps: S01-S07, weighing the following raw materials: 120 parts of activated carbon, 250 parts of water, 3-9.1 parts of gold chloride, 118.9-129.8 parts of cobalt salt, a 40%-80% hydrazine hydrate aqueous solution, a 30% sodium hydroxide aqueous solution, 500 parts of dichloromethane and 69.4 parts of a cyclopentadiene monomer; the preparation method comprises the following steps: adding activated carbon, gold chloride, cobalt salt and water into a reaction kettle, starting stirring, controlling the temperature at 10-15 DEG C, dropwise adding a 40% hydrazine hydrate aqueous solution, and slowly heating to 50-55 DEG C after dropwise adding; and filtering the reaction liquid, drying the filtered solid, and putting into a reaction kettle. According to the invention, cobalt salt with wide source and low price is used as a raw material to synthesize the carbonyl cobalt compound, and the carbonyl cobalt compound does not need to be synthesized by taking cobalt octacarbonyl with high price and the like as a carbonyl cobalt source to react with corresponding organic matters.

The invention discloses tris (dimethylamino) cyclopentadienyl hafnium and a preparation process thereof.The preparation process of the tris (dimethylamino) cyclopentadienyl hafnium comprises the following steps that S1, an n-hexane solution of n-butyllithium and dimethylamine are subjected to a reaction, and a lithium dimethylamino emulsion is obtained; s2, adding hafnium tetrachloride into the lithium dimethylamino emulsion for reaction, and separating to obtain a liquid-phase product; s3, the liquid-phase product is heated, a tetra (dimethylamino) hafnium concentrated solution is obtained, and the volume of the tetra (dimethylamino) hafnium concentrated solution is 20%-30% of the volume of the liquid-phase product; and S4, obtaining cyclopentadiene, adding the cyclopentadiene into the tetra (dimethylamino) hafnium concentrated solution to react, and filtering to obtain tris (dimethylamino) cyclopentadienyl hafnium. According to the preparation process of the tris (dimethylamino) cyclopentadienyl hafnium, complex solvent components are not needed, the preparation efficiency is improved, and the use amount of the solvent and the preparation cost are reduced.

The invention discloses a dithieno-cyclopentadiene copolymer photovoltaic material, a preparation method and photovoltaic application of the dithieno-cyclopentadiene copolymer photovoltaic material. According to the invention, a dithieno-cyclopentadiene electron donor unit is synthesized, and the dithieno-cyclopentadiene electron donor unit is connected with another electron acceptor unit dithieno benzothiadiazole through a carbon-carbon single bond by a Stille coupling method. The polymer donor photovoltaic material has optical absorption complementary with that of a fullerene acceptor material and HOMO and LUMO energy levels matched with those of the fullerene acceptor material. A polymer solar cell is prepared by taking the polymer as an electron donor and fullerene as an electron acceptor, the highest energy conversion efficiency of the polymer solar cell can reach 5.44%, and the polymer solar cell has relatively good photoelectric conversion efficiency.

The invention relates to a method for producing diacetylmonoxime with high selectivity. The method comprises the following steps: by taking a catalyst, a solvent, butanone, ammonia water and a hydrogen peroxide aqueous solution as raw materials, carrying out ammoximation reaction, tert-butyl alcohol rectification, oxime-water separation and diacetylmonoxime rectification to obtain diacetylmonoxime; the catalyst is a boron-nickel-doped titanium silicalite molecular sieve, and the titanium silicalite molecular sieve, sulfydryl siloxane and ethanol are mixed to react, filtered and dried to obtain the sulfydryl titanium silicalite molecular sieve; the preparation method comprises the following steps: heating and reacting a mercapto titanium silicalite molecular sieve, allyl (cyclopentadienyl) nickel and sodium ethoxide; and finally adding (+)-IPC2B (allyl) borane, continuously reacting, and distilling to remove ethanol, thereby obtaining the product. The diacetylmonoxime prepared by the method disclosed by the invention has relatively high conversion rate and selectivity.

The invention discloses a synthetic method of tris (isopropyl cyclopentadienyl) lanthanum. The synthetic method comprises the following steps: preparing a lanthanum trichloride tetrahydrofuran complex; synthesis of isopropyl cyclopentadiene is carried out; and synthesis of tri (isopropyl cyclopentadienyl) lanthanum. According to the technical scheme, the lanthanum trichloride tetrahydrofuran complex is prepared firstly and then reacts with lithium dimethylamino and isopropyl cyclopentadiene in sequence, and the target product is obtained. Reaction raw materials are simple and easy to obtain, operation is convenient, the safety coefficient is high, the yield is high, and the method is suitable for industrial large-scale production.

The invention relates to the technical field of engineering plastics, and discloses a polydicyclopentadiene / carbon nanofiber composite material and a preparation method and application thereof.The method comprises the steps that DCPD, ENB and MNA are mixed to be uniform, CNF is added and subjected to ultrasonic dispersion, a Grubbs second-generation catalyst is added and subjected to ultrasonic dispersion after freezing, finally, mixed liquid is poured into a mold, and the polydicyclopentadiene / carbon nanofiber composite material is obtained. And heating and curing to obtain the high-performance PDCPD / CNF composite material. According to the preparation method, the interaction between PDCPD and CNF can be remarkably improved, so that the mechanical property of the composite material is improved, the used raw material DCPD has low viscosity and high reaction activity, and rapid forming can be realized; meanwhile, the whole production process of the modified PDCPD composite material is green and environment-friendly, the process is simple, complicated chemical modification is not involved, and the feasibility of large-scale industrial production is achieved.

To provide an epoxy resin composition that has low volume resistivity and exhibits suitable conductivity when formed as a coating film, and that makes it possible to form a coating film having excellent solder wettability and solder erosion resistance.SOLUTION: An epoxy resin composition contains the following components (A) to (D): (A) one or more epoxy resins selected from the group consisting of triphenylmethane-type epoxy resins, naphthalene-type epoxy resins, and phenol novolac-type epoxy resins; (B) one or more epoxy resins selected from the group consisting of polyether-modified epoxy resins, urethane-modified epoxy resins, mesogen-modified epoxy resins having an -O-CH2CH(OH)CH2-O- skeleton in the molecule thereof, bisphenol-type epoxy resins, and dicyclopentadiene-type epoxy resins; (C) an imidazole-based compound and / or a phenol-based compound; and (D) one or more conductive powders selected from among silver-coated copper powders, silver-based powders, nickel-based powders, conductive carbon powders, copper-based powders, and gold-based powders.SELECTED DRAWING: None

The invention discloses an insulating rod material based on a modified epoxy material and a preparation method thereof, and belongs to the technical field of insulating rods. Comprising the following raw materials in parts by weight: 70-90 parts of bisphenol epoxy resin, 15-25 parts of polydicyclopentadiene, 10-20 parts of modified glass fibers, 1-3 parts of a curing accelerator, 4-12 parts of an antioxidant and 2-4 parts of a lubricant. The prepared insulating rod material takes bisphenol epoxy resin as a matrix, so that the insulating rod material is endowed with excellent insulativity and corrosion resistance; wherein the antioxidant can greatly enhance the oxidation resistance of the insulating rod material; wherein the modified glass fiber not only can promote curing of the epoxy resin, but also can remarkably enhance flame retardance, mechanical properties and heat resistance to a certain degree of the insulating rod material, and the performance is long and stable; therefore, the insulating rod material prepared by the invention is good in insulativity and corrosion resistance, has stable and efficient flame retardance, mechanical properties, oxidation resistance and heat resistance to a certain degree, and is halogen-free, flame-retardant and environment-friendly.

The invention discloses fast-curing modified polydicyclopentadiene resin as well as a preparation method and application thereof. The preparation method comprises the following steps: preparation of a polydicyclopentadiene resin system: dissolving a Grubbs second-generation catalyst and tributyl phosphite in cyclohexylbenzene to prepare a catalyst solution, and mixing the prepared catalyst solution with a dicyclopentadiene or norbornene-dicyclopentadiene mixed solution; preparing an epoxy resin system: adding an anhydride curing agent and an accelerant into epoxy resin and fully mixing; and mixing and stirring the epoxy resin system and the polydicyclopentadiene resin system, uniformly mixing, and storing at room temperature to obtain the modified polydicyclopentadiene resin. The curing degree of the modified PDCPD resin can reach 90-95% within 3-5 minutes under the condition of 60-90 DEG C. The modified PDCPD resin has good interface bonding with carbon fibers, glass fibers and basalt fibers, and the prepared composite material has excellent mechanical properties and high heat resistance.

The invention belongs to the field of electronic materials, and particularly relates to a synthesis method of a high-purity metal complex precursor. Compared with a synthesis method in the prior art, the synthesis method provided by the invention changes a reaction route, substituted cyclopentadiene is prepared firstly, then the substituted cyclopentadiene reacts with butyl lithium and metal chloride in sequence to obtain a substituted cyclopentadienyl metal trichloride intermediate, and finally the substituted cyclopentadienyl metal trichloride intermediate reacts with lithium dialkylamino to obtain the substituted cyclopentadienyl metal trichloride. The target product substituted cyclopentadienyl tri (dialkylamino) metal complex is obtained, and the prepared product is high in yield and purity. The synthesis method provided by the invention is convenient for large-scale production in factories, improves the productivity, and meets the ever-increasing market demand.

The invention discloses hydrogenated modified resin as well as a preparation method and application thereof, and belongs to the technical field of bio-based materials. The preparation method comprises the following steps: carrying out polymerization reaction on cyclopentadiene and derivatives thereof and norbornene monomers in the presence of a first solvent, and then adding modified monomers for continuous reaction; separating out the cycloolefin copolymer and reacting the cycloolefin copolymer with bio-based carboxylic acid in the presence of a second solvent to obtain a second polymerization solution; and removing unreacted monomers and residual solvents and oligomers, then carrying out a hydrogen reaction with deeply hydrogenated naphthenic oil under the action of a noble metal hydrogenation catalyst, and removing impurities, gel substances, residual solvents and oligomers to obtain the hydrogenated modified resin. The method is simple in process, easy to operate and mild in condition, the bio-based synthetic resin with medium-low molecular weight and high performance can be obtained, and the hydrogenated modified resin has excellent tackifying performance and can be applied to the fields of hot melt adhesives, automobile parts, packaging materials or medical equipment and the like.

Diaryl silane bridged metallocene catalysts, methods of making the same, and propylene polymers (copolymers) made therefrom. The obtained silane-bridged metallocene catalyst has very high activity in the polymerization of olefins, especially ethylene and propylene. The diarylsilane bridged metallocene may be synthesized by substituting a dichlorocyclopentadienyl fragment with lithium indenyl. Direct lithiation / substitution with an aryl or alkyl lithium reagent provides a dilithiated ligand that undergoes metallization with a Group IV metal precursor.

The present application relates to the technical field of colored tire rubber, and specifically discloses an anti-discoloration rubber composition for colored tires and its preparation method. An anti-discoloration rubber composition for colored tires is prepared by first preparing modified colored silica, then using solution-polymerized styrene-butadiene rubber, natural rubber, and EPDM as the rubber matrix, adding modified colored silica for coloring and reinforcement, and then adding polydicyclopentadiene resin, titanium dioxide, YDH-151 silane coupling agent, zinc oxide, stearic acid, sulfur and TBBS accelerator, protective wax, AFS / LG antioxidant, antistatic agent and other auxiliary agents to prepare the anti-discoloration rubber composition for colored tires. The anti-discoloration rubber composition for colored tires prepared in this application has the advantages of stable color, aging resistance, good tensile strength, strong wear resistance, and strong weather resistance.

The invention relates to a hydrocarbon resin polymer, a manufacturing method thereof and a substrate structure. The hydrocarbon resin polymer comprises a repeating unit (A) derived from dicyclopentadiene (D CPD). The hydrocarbon resin polymer has a fluorine substituent group, and the content of the fluorine substituent group is 100-4500 ppm based on the total weight of the hydrocarbon resin polymer.

To provide a fluorine substituent-containing hydrocarbon resin polymer having excellent electric performance, and production method of the same, and a substrate structure including a resin layer formed by cross-linking a resin composition including the hydrocarbon resin polymer.SOLUTION: A hydrocarbon resin polymer including a repeating unit (A) is derived from dicyclopentadiene (DCPD). The hydrocarbon resin polymer has a fluorine substituent where a content of the fluorine substituent is 100-4,500 ppm. A production method of the hydrocarbon resin polymer includes a step of polymerizing a mixture in the presence of a fluorine-containing compound, where the fluorine-containing compound is a boron trifluoride complex, and the mixture includes dicyclopentadiene. A substrate structure includes a resin layer, and a conductive layer disposed on the resin layer. The resin layer is formed from a resin composition including the hydrocarbon resin polymer using a cross-linking process.SELECTED DRAWING: Figure 2

The invention relates to a high-thermal-conductivity low-dielectric epoxy resin composition and a preparation method thereof, and the high-thermal-conductivity low-dielectric epoxy resin composition comprises the following raw materials in parts by weight: 13-16 parts of a thermal conductive filler, 45-50 parts of epoxy resin, 23-27 parts of a curing agent and 0.3-0.7 part of an accelerant, the heat-conducting filler comprises attapulgite, modified boron nitride and aramid fiber in a mass ratio of (0.7-0.9): (6-9): (0.2-0.5). The attapulgite, the modified boron nitride and the aramid fiber are used as heat-conducting fillers, the dicyclopentadiene epoxy resin and the bisphenol A epoxy resin are used as epoxy resin, and the epoxy resin with high heat conductivity and low dielectric property is prepared by means of weakening charge transfer among molecules, reducing polarization effect, forming a three-dimensional heat-conducting network and the like.

The present invention relates to a small molecule receptor based on two-dimensional side chain substitution of benzodithiophenedione and a preparation method and application thereof. Through two-dimensional substitution of the side chain of benzodithiophenedione, thiophene, dithienocyclopentadiene and other bridge units are coupled, and electron-deficient units are connected to obtain the corresponding small molecule receptor material. The material provided by the present invention has good solution processability and self-assembly ability. It can be used to make optoelectronic functional devices, including organic photovoltaic cells.

The invention relates to the technical field of polymer composite materials, in particular to an explosion-proof and impact-resistant polymer coating material for an aircraft shell. The coating is prepared from aliphatic polyurethane acrylate, cycloaliphatic epoxy resin, nano silicon dioxide, polyethylene glycol, polyurea microcapsules, dicyclopentadiene resin, a Grubb catalyst, graphene oxide, polysulfide rubber and the balance of auxiliary materials. According to the invention, aliphatic polyurethane acrylate is used as a flexible matrix, so that the risk of hydrolysis of aromatic isocyanate is avoided. The dicyclopentadiene resin is subjected to in-situ ring opening polymerization in the presence of a Grubbs catalyst and cooperates with the hydrophobic nano silicon dioxide to block water. The polyurea microcapsules are broken by impact to release silicone oil, and cracks are filled immediately to reduce friction. And a water molecule permeation path is prolonged by the mica powder sheet layer. And the epoxy-polyurethane network realizes micro-crack self-repairing through dynamic ester bond exchange, so that the anti-explosion and anti-impact functions of the coating and the structural stability of an aircraft shell in an extreme environment are guaranteed.

The present invention relates to a matting agent for HAA powder coatings and a preparation method thereof. The matting agent is a matting polymer containing special groups such as hydroxyl and epoxy groups with significantly different activities. The matting polymer is mainly prepared from glycidyl methacrylate, methyl methacrylate, butyl acrylate, 5-norbornene-2-methanol, 2-methyl-3-butene-2-ol, dicyclopentadiene dioxide, a hydroxyl polyester resin, and an accelerator. Due to the presence of hydroxyl and epoxy groups of varying activities in its structure, supplemented by the accelerator and the physical dispersion effect during the preparation process, the product has excellent matting ability and good storage and matting stability. It can reduce the gloss of HAA system powder coatings to 3-10%.

The invention provides a preparation method and application of an asymmetric dicyclopentadienyl dialkoxy zirconium compound, and the preparation method comprises the following steps: (1) mixing a solvent with ZrCl4 and sodium cyclopentadienyl CpNa, and carrying out a reaction to obtain CpZrCl3; (2) the CpZrCl3 obtained in the step (1) and R1 substituted sodium cyclopentadienyl R1CpNa are subjected to a mixed reaction, and (R1Cp) CpZrCl2 is obtained; and (3) mixing the (R1Cp) CpZrCl2 obtained in the step (2) with alkoxy sodium salt R2Na, and carrying out a reaction so as to obtain the asymmetric dicyclopentadiene dialkoxy zirconium compound. According to the method, the substitution reaction of three sodium salts is used for replacing the ligand replacement reaction in the prior art, so that the reaction steps are shortened, the use of unnecessary raw materials is avoided, the production cost is reduced, and the obtained target product is high in yield and high in purity.

The invention discloses a carbon fiber modified sizing agent as well as a preparation method and application thereof. The preparation method of the carbon fiber modified sizing agent comprises the following steps: (1) reacting 5-norbornene-2-methylamine with monofunctional epoxy resin to obtain slurry; and (2) dissolving the slurry prepared in the step (1) in an organic solvent to prepare the modified sizing agent. And then obtaining the modified carbon fiber through a dipping and sizing process. The method is simple in process, and the interface bonding strength of the carbon fibers and the polydicyclopentadiene can be greatly improved.

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.

Compounds of general formula I wherein Fc and Fc′ may be the same or different and are substituted ferrocenyl moieties having at least one ring substituent selected from sulfur-containing groups, phosphorus-containing groups, iodo, chloro, silyl, fluoroalkyl groups containing two or more fluorine atoms, heteroaryl, substituted phenyl, and cyano, wherein if present as sole substituent the cyano group is located on the proximal cyclopentadienyl ring; X is a spacer, Y is a spacer, Z is a spacer; and R is a linker group. Compound I may be used to make labelled substrates, functionalised compounds for making labelled substrates and may be used as labels in an electrochemical assay.

The invention relates to a thermal visbreaking pressure-sensitive adhesive, an integrated foam double-sided adhesive tape and a preparation method thereof, the thermal visbreaking pressure-sensitive adhesive comprises the following raw materials: an acrylate polymer solution, a rubber elastomer, tackifying resin, a foaming agent and a curing agent; the acrylate polymer solution is prepared from the following raw materials in parts by mass: 10 to 30 parts of cyclopentadienyl acrylate monomers, 10 to 20 parts of 2-ethylhexyl acrylate, 20 to 70 parts of ethyl acrylate, 4 to 18 parts of methyl methacrylate, 2 to 15 parts of 2-hydroxyethyl acrylate, 0.1 to 1 part of an initiator and 150 to 350 parts of a solvent; the thermal viscosity-reducing pressure-sensitive adhesive has the characteristics of high viscosity at room temperature and greatly reduced stripping force at high temperature, so that an adhered base material can be reused, and the cost is saved. The integrated foam double-sided adhesive tape is prepared by coating the release film with the thermal viscosity-reducing pressure-sensitive adhesive and then drying and foaming, and a closed-cell structure is formed by foaming, so that the adhesive layer has good rebound resilience and impact resistance.

The invention relates to the technical field of colored tire rubber, and particularly discloses an anti-tarnishing rubber composition for a colored tire and a preparation method of the anti-tarnishing rubber composition. According to the anti-discoloration rubber composition for the colored tire, the modified colored white carbon black is firstly prepared, then the solution polymerized styrene-butadiene rubber, the natural rubber and the ethylene propylene diene monomer are used as rubber matrixes, and the modified colored white carbon black is added for coloring and reinforcing; and adding auxiliary agents such as polydicyclopentadiene resin, titanium dioxide, a YDH-151 silane coupling agent, zinc oxide, stearic acid, sulfur, a TBBS accelerator, protective wax, an AFS / LG anti-aging agent, an antistatic agent and the like to prepare the anti-tarnishing rubber composition for the colored tire. The anti-discoloration rubber composition for the colored tire has the advantages of being stable in color, resistant to aging, good in stretchability, high in wear resistance and high in weather resistance.

A process for making a poly alpha-olefin (PAO) having a relatively high vinylidene content (or combined vinylidene and tri-substituted vinylene content) and a relatively low vinyl and / or di-substituted vinylene content, as well as a relatively low molecular weight. The process includes: contacting a feed containing a C2-C32 alpha-olefin with a catalyst system comprising activator and a bis-cyclopentadienyl metallocene compound, typically a cyclopentadienyl-benzindenyl group 4 transition metal compound.

The invention provides dicyclopentadiene phenol resin and a preparation method thereof, dicyclopentadiene phenol epoxy resin and a preparation method and application thereof. Compared with common dicyclopentadiene phenol resin, the dicyclopentadiene phenol resin has unsaturated cycloolefin active functional groups at the tail ends of molecular chains, so that the reactivity of the resin can be improved, and the application field of the dicyclopentadiene phenol resin is expanded.

The invention provides a method for preparing a CGC ligand, which comprises the following steps: mixing tetra-substituted cyclopentadiene and n-butyllithium under a mechanical vibration condition, carrying out lithiation reaction under an ultrasonic condition, and then carrying out silicification reaction with a disubstituted dichlorosilane solution, the preparation method comprises the following steps: preparing a silicification product into a tetrahydrofuran solution of the silicification product by using tetrahydrofuran, mixing primary amine and n-butyllithium under a mechanical vibration condition, carrying out lithiation reaction under an ultrasonic condition, carrying out amination reaction on an obtained lithiation reaction solution and the prepared tetrahydrofuran solution of the silicification product, and carrying out post-treatment on the obtained amination reaction solution to obtain the CGC ligand. According to the method for preparing the CGC ligand, the CGC ligand is continuously prepared by coupling the ultrasonic microreactor with local mechanical vibration, the danger coefficient is low, the reaction efficiency is high, the cost is saved, the period is short, and meanwhile, the problem that an organic lithium intermediate generated by lithiation reaction is deposited in the microreactor is solved.

The invention provides a synthesis method of tris (dimethylamino) cyclopentadienyl hafnium, which comprises the following steps: reacting hafnium tetrachloride with sodium dimethylamino at a first temperature under the protection of inert gas to form an intermediate; heating and settling, cooling to a second temperature, dropwise adding cyclopentadiene, and filtering, distilling and purifying to obtain a target product. According to the method, high yield and high purity are achieved by optimizing the raw material ratio and controlling the dropwise adding temperature and the use amount of cyclopentadiene. The byproduct sodium chloride is large in particle and easy to filter, the post-treatment process is remarkably simplified, and the process safety, controllability and industrial adaptability are improved.

The invention provides a preparation method of dicarbonyl cyclopentadienyl cobalt, which comprises the following steps: adding cobalt salt, a reducing agent, methyl formate and a catalyst into a high-pressure reaction kettle, keeping the reaction kettle in an inert gas atmosphere, and heating and stirring; cooling the high-pressure reaction kettle to room temperature, discharging gas, filtering reaction liquid, and putting filtrate into a normal-pressure reaction device in an inert gas atmosphere; and adding a cyclopentadiene monomer into the normal-pressure reaction device, carrying out heating reaction, filtering after the reaction is finished, and carrying out post-treatment on the obtained filtrate to obtain a dicarbonyl cyclopentadienyl cobalt crude product. The operation risk is reduced, the operation is simple, and the synthesis efficiency is high; cheap and easily available cobalt salt is used as a raw material, and a relatively cheap catalyst is used, so that the synthesis cost is low, and the method is suitable for industrial large-scale popularization and application.