31 results about "Organometallic catalysis" patented technology

The application relates to the technical field of batteries, in particular to a hard carbon negative electrode material and a preparation method and application thereof. A preparation method of a negative electrode hard carbon material comprises the following steps: carrying out first heat treatment on a mixture of an organic metal catalyst and biomass activated carbon, introducing a gas-phase carbon source and carrying out second heat treatment to obtain first material, and carrying out carbonization treatment and acid pickling treatment on the first material. The method can improve the capacity and initial efficiency of the hard carbon negative electrode material through cooperation of various steps; the method is simple in process and easy to realize large-scale production.

An alkoxysilyl-containing polyurethane polymer composition is prepared using a urethane-forming organometallic catalyst which is then stabilized to moisture exposure by the addition of a mercapto-containing compound. The stabilized moisture-curable alkoxsilyl-containing polyurethane polymer composition is activated to moisture curing by the addition of a hydrolysis and condensation catalysts. The stabilized moisture-curable alkoxsilyl-containing polyurethane polymer composition is useful as a component in the preparation of coatings, adhesives, sealants, consumer goods and industrial goods.

The present application relates to the field of environmental protection, and particularly to a technology for disposing of wind power generation scrap materials by using industrial kiln; the organic metal catalytic adsorption filler prepared by the present application is used for adsorbing dioxins in flue gas; through catalytic reaction, the dioxins are converted into more harmless or more easily handled compounds, so as to reduce the content; at the same time, the adsorption effect can also help to remove dioxins from the flue gas; such conversion includes breaking of chemical bonds, rearrangement or change of functional groups, etc.; through these changes, the toxicity and stability of dioxins are reduced, so that they are more easily handled or degraded; at the same time, due to the adsorption effect, the dioxins are fixed on the catalyst or adsorbent, so as to be effectively removed from the flue gas; the present application has simple process, small investment, low cost and high economy, and industrial waste such as plastic, rubber, tire, etc. is used as combustion-supporting material.

The invention relates to the technical field of synthetic leather, and particularly discloses easily-coated solvent-free polyurethane synthetic leather and a preparation method and application thereof.The easily-coated solvent-free polyurethane synthetic leather sequentially comprises a water-based surface treatment layer, a water-based polyurethane surface layer, a solvent-free polyurethane bonding layer and a base cloth layer from top to bottom, the solvent-free polyurethane bonding layer is prepared from solvent-free polyurethane bonding layer slurry, and the solvent-free polyurethane bonding layer slurry is prepared from the following components in parts by mass: 85 to 95 parts of polycarbonate polyether polyol, 5 to 15 parts of polyether type thermoplastic polyurethane elastomer micro powder, 90 to 110 parts of isocyanate, 40 to 60 parts of a flame retardant and 0.05 to 0.10 part of an organic metal catalyst. And 0.10 to 0.20 part of an amine catalyst. The polyether type thermoplastic polyurethane elastomer micro-powder is introduced into the solvent-free polyurethane bonding layer slurry, and the polyether type thermoplastic polyurethane elastomer micro-powder in the system can melt and flow during heating processing, so that the thermoplasticity and tensile property of the synthetic leather can be improved.

The application discloses a method for recovering lactic acid methyl ester by catalytic depolymerization of polylactic acid in one pot. The method comprises the following steps: mixing polylactic acid, amine nitrogen ligand and methanol, dissolving by adding a solvent, and then adding a n-butyllithium solution to carry out a depolymerization reaction; and after the reaction is completed, the solvent is removed by vacuum distillation, and the crude product is dried in vacuum to obtain lactic acid methyl ester product. The application does not need to synthesize a complex organic metal catalyst, the depolymerization condition is mild, and the generation of by-products such as low-molecular-weight oligomers is effectively reduced. Therefore, the application has the advantages of simplifying the catalyst preparation process, improving the depolymerization efficiency, reducing the cost and the like, and is suitable for industrialized recovery and cyclic utilization of polylactic acid.

The invention relates to the field of functional coatings, in particular to high-temperature printing ink for an automobile protective cover and a production process of the high-temperature printing ink. The invention relates to high-temperature printing ink for an automobile protective cover. The high-temperature printing ink is prepared from the following raw materials: a silicon modified polyimide prepolymer, a composite nano filler, a composite pigment, a low-temperature catalytic curing system, a solvent and an auxiliary agent, the composite nano filler comprises coated nano cerium oxide and flaky nano boron nitride, wherein the coated nano cerium oxide is nano cerium oxide particles of which the surfaces are coated with silicon dioxide layers; the weight ratio of the coated nano cerium oxide to the flaky nano boron nitride is (2-6): 1; the thickness of the silicon dioxide layer is 3-10 nm; the low-temperature catalytic curing system comprises blocked isocyanate and an organic metal catalyst. According to the high-temperature printing ink for the automobile protective cover and the production process of the high-temperature printing ink, through creative material design and process control, the industrial problems of coating yellowing, adhesive force loss, high curing energy consumption and the like in a long-term high-temperature environment are successfully solved.

The application discloses a kind of organic metal catalyst based on biguanide-based ligand and its preparation method and application, belong to polymer material field.The organic metal catalyst is by the ligand with biguanide-based structure and magnesium salt coordination and form.The preparation method of the application is simple, condition is mild, the obtained organic metal catalyst is with magnesium as metal center, its toxicity is lower, catalytic activity is high, can successfully catalyze cyclic lactone under solvent or solvent-free condition ring-opening polymerization reaction, and product molecular weight is high, distribution is narrow.

This invention discloses an ultra-low friction lubricating material system with self-catalytic effect and its preparation method, belonging to the field of lubricant technology. The ultra-low friction lubricating material system is composed of a base oil, an organometallic catalyst, and organic additives. The organometallic catalyst is at least one selected from ferrocene, cobalt carbonate, cobalt oxalate, copper acetate, and nickel oxalate. The organic additives are at least one selected from o-xylene, ethylene glycol, dodecanol, oleic acid, and tetraethyl orthosilicate. During friction, the organometallic catalyst releases metal ions, which, under the action of frictional heat and contact pressure, catalyze the base oil components to form a carbonaceous lubricating film in situ on the surface of the friction pair. The organic additives provide an additional carbon source during friction, working together with the organometallic catalyst to reduce the break-in time for the friction pair to reach a stable state. This lubricating material system not only significantly reduces the coefficient of friction and wear rate but also significantly shortens the break-in time.

The application discloses a flocculant for concrete mixture water-washed sand and a preparation method thereof. The flocculant is in a spherical configuration and is composed of a polystyrene inner core and a large number of polyacrylamide coating layers grafted on the surface of the polystyrene inner core. The preparation method comprises the following steps: firstly, preparing a styrene / hydroxyethyl acrylate / methoxy-terminated polyethylene glycol alkene copolymer P through free radical polymerization; then, performing ring-opening polymerization on the copolymer P by taking alpha-halogen-gamma-lactone as a polymerization monomer under the action of an organic metal catalyst to obtain a grafted poly(alpha-halogen-gamma-lactone) polymer S; then, adding magnesium powder to prepare a Grignard reagent polymer S-Mg-X; then, introducing carbon dioxide and hydrogen to prepare a carboxylic acid polymer S-COOH; then, filtering and removing magnesium carbonate precipitate; and finally, adding ammonia to perform amidation reaction to prepare the flocculant. The machine-made sand prepared by using the flocculant for concrete mixture water-washed sand has excellent initial plasticizing performance and good plasticizing retention capacity.

The invention discloses a UV / moisture dual-curing organic silicon resin composition and a preparation method thereof. The composition comprises the following components: (A) 85-96 wt% of acrylic modified silicone resin; (B) 0.5-2 wt% of a photoinitiator; (C) an acrylic ester diluent with the content of 1 to 5 weight percent; (D) 0.5-2 wt% of an organic metal catalyst; (E) 1-5 wt% of polyether modified silicone oil; and (F) 0.02-1 wt% of an auxiliary agent. The composition has the characteristics of good storage stability, deep curing depth, low light curing energy, high curing efficiency, good protection performance and the like.

Provided is a process for hydrogenolysis of a polymer that includes providing in a reactor the polymer, hydrogen gas and a supported organometallic catalyst. The supported organometallic catalyst formed from an organometallic complex precatalyst and an acidic metal oxide support. The polymer is reacted with the supported organometallic catalyst in the presence of the hydrogen gas at a predetermined temperature in the reactor to produce a reduced polymer product having a weight average molecular weight less than the polymer.

The purpose of this invention is to provide a moisture-curing composition that exhibits high elongation, high strength, and excellent heat resistance after curing. This invention provides a moisture-curing composition containing the following components (A) to (C): (A) an organic polymer having two or more alkoxysilyl groups within its molecule; (B) an organometallic catalyst; and (C) an aromatic secondary amine compound.

The present invention relates to a process for preparing a polyurethane polymer comprising: (A) contacting at least one isophorone diisocyanate (IPDI) monomer with at least one first polyol in the presence of at least one first catalyst; (B) contacting a urethane prepolymer with at least one second polyol in the presence of at least one second catalyst to form a polyurethane polymer, wherein the first catalyst is a guanidine-type catalyst and the second catalyst is an organometallic catalyst, or wherein the first catalyst is an organometallic catalyst and the second catalyst is a guanidine-type catalyst. The present invention also relates to a two-component composition and its use as an adhesive for bonding two substrates together. Finally, the present invention relates to an article comprising at least one layer obtained by crosslinking said composition and to a process for preparing said article.

Provided is a method for preparing Compound II, wherein the method includes the following steps: using Compound I as a raw material, performing a reaction under the action of an organometallic catalyst and a phase transfer catalyst, and oxidizing with hydrogen peroxide to obtain Compound II. The catalyst utilized in the present application exhibits remarkably high activity for the oxidation of sulfur ether compounds, leading to the preparation of sulfone compounds. The method for preparing Compound II significantly reduces the amount of catalyst required, effectively diminishing the consumption of non-renewable scarce strategic resources, while concurrently reducing the potential hazards to the natural environment. The novel method exhibits a substantial reduction in the amount of catalyst required, leading to a concurrent decrease in the consumption of non-renewable resources. Concurrently, it significantly mitigates potential harm to the natural environment and human health. The solvent utilized in this method is easy to be recycled and reused, and enhances overall process efficiency by reducing resource consumption, waste generation, and treatment costs, thereby rendering it more suitable for industrial production.

A manufacturing process for a one-component polyurethane-modified epoxy resin emulsion, characterized in that it comprises the following steps: mixing epoxy resin, monohydroxy acrylate, dialkyl maleate, ketone solvent, aprotic polar solvent, and polymerization inhibitor to obtain a mixed solution, wherein the epoxy resin has an epoxy equivalent of ≥ 300 g / equivalent; mixing polyethylene glycol, polyether diol and / or polyester diol, diisocyanate, and organometallic catalyst, and carrying out an addition polymerization reaction to obtain a polyurethane prepolymer; mixing the mixed solution and the polyurethane prepolymer, carrying out an addition reaction, emulsification with the addition of water, and subsequent removal of the ketone solvent to obtain a water-based polyurethane epoxy emulsion.Mixing the water-based polyurethane epoxy emulsion with alkyldiamine, carrying out a Michael addition-ring-opening addition reaction to obtain a one-component polyurethane-modified epoxy resin emulsion, wherein the dialkyl maleate comprises one or more of diethyl maleate, dibutyl maleate and diisooctyl maleate.

The invention discloses a homogeneous organic metal catalyst for cracking hydrocarbon fuel RX-2 as well as a preparation method and application of the homogeneous organic metal catalyst, and the homogeneous organic metal catalyst which is used for cracking RX-2 and has better dissolving performance and lower additive amount is prepared on the basis of a liquid phase reaction method with a simple process by regulating and controlling a metal active center of the catalyst and the types of ligands. The prepared homogeneous organic metal catalyst is applied to RX-2 cracking, the fuel cracking conversion rate and the gas production rate are effectively improved, the content of effective gas is increased, and the heat absorption performance of fuel is improved. The method has good practical application value in the aspect of active cooling in the hypersonic field.

The invention relates to the technical field of medical repair materials, in particular to a degradable repair membrane, a preparation method and application thereof and a guided bone regeneration membrane. The preparation method comprises the following steps: mixing polyether polyol, diisocyanate and an organic metal catalyst, and carrying out an end capping reaction at 25-45 DEG C to form a diisocyanate-terminated polyether polyol prepolymer intermediate; mixing the polyether polyol prepolymer intermediate and polyester polyol, and carrying out a synthetic reaction at 60-70 DEG C to form a degradable polymer; the degradable repairing film is formed by using the degradable polymer. The degradable repair membrane can effectively prevent fibroblasts from entering bone defect parts, can promote adhesion and proliferation of osteoblasts and regeneration of bone tissues, has good biocompatibility, biodegradability and suitable physicochemical and mechanical properties, and can fully meet clinical application requirements.

The application discloses a corncob sugar residue / castor oil-based coated controlled-release fertilizer and a preparation method thereof. The coated controlled-release fertilizer is prepared by the following method: (1) mixing corncob sugar residue and a polyol to carry out a liquefaction reaction to obtain liquefied corncob sugar residue-based polyol A; (2) mixing the liquefied corncob sugar residue-based polyol A and castor oil at room temperature to obtain coated raw material B; (3) mixing isocyanate and an organic metal catalyst at room temperature to obtain coated raw material C; (4) mixing the coated raw material B and the coated raw material C at room temperature to obtain coated controlled-release raw material D; and spraying the coated controlled-release raw material D on the surface of core fertilizer particles to carry out an in-situ polymerization reaction, so that the corncob sugar residue / castor oil-based coated controlled-release fertilizer is prepared. The fertilizer is not only green and environment-friendly, but also can effectively improve the utilization rate of the fertilizer, the initial release rate of nutrients is less than 10%, and the cumulative release period is more than 30 days.

The application provides a zinc biguanide complex and a preparation method thereof and a preparation method of polylactide. The chemical structural formula of the zinc biguanide complex is shown in the following formula: The application further provides a preparation method of polylactide, which comprises the following steps: uniformly mixing lactide monomers with the zinc biguanide complex, and heating to make the lactide monomers perform a polymerization reaction to obtain polylactide. The application uses a low-toxicity organic metal catalyst to replace a toxic stannous octoate catalyst, efficiently catalyzes the ring-opening of lactone, and is used for realizing a green and environment-friendly process to produce aliphatic polyester.

This invention provides a method for preparing compound II. The method uses compound I as a raw material, reacting it under the action of an organometallic catalyst and a phase transfer catalyst in the presence of hydrogen peroxide oxidation to obtain compound II. The catalyst used in this invention exhibits extremely high activity for the preparation of sulfone compounds from sulfide oxides. This preparation method significantly reduces the amount of catalyst used, effectively reducing the consumption of non-renewable and scarce strategic resources, while greatly reducing potential harm to the natural environment and human health. The solvent used is easily recyclable and reusable. The overall process is more efficient, consumes fewer resources, produces less waste, and has lower waste treatment costs, making it more suitable for industrial production.

The present application belongs to the technical field of fertilizer, and specifically discloses a xylose residue-based coating material, a preparation method thereof and a coated controlled-release fertilizer. The present application utilizes a mixture C obtained by mixing epoxy resin and wax water-blocking agent and an amine compound to react, obtaining an intermediate product 1; then utilizes xylose residue, polyol and a catalyst to mix and react, obtaining a mixture A, and utilizes isocyanate and an organic metal catalyst to mix, obtaining a mixture B, which are utilized to react on one side of the surface of the intermediate product 1, obtaining an intermediate product 2; then utilizes the mixture C and the amine compound to react on one side of the surface of the intermediate product 2, obtaining the xylose residue-based coating material. The fertilizer is coated to obtain the coated controlled-release fertilizer. The xylose residue-based coated controlled-release fertilizer prepared by the present application not only reduces the dependence on petroleum resources, but also reduces the preparation cost, is beneficial to environmental protection, improves the economic benefit, simultaneously guarantees the slow-release performance of the fertilizer, and effectively improves the utilization rate of the fertilizer.

This invention discloses a novel bisphosphine ligand, its preparation method, and its applications, belonging to the field of organometallic catalysis technology. The invention utilizes a chemical synthesis method, starting with ferrocene or 1,1'-dimethylferrocene, followed by butyl lithiation (or bromination), introduction of an aldehyde group (or palladium-catalyzed hydromethyl esterification), aldehyde reduction (or ester reduction), halogenation of the hydroxyl group (or bis-OTf oxidation), and condensation with a lithium phosphine reagent (or direct Herrman-Beller catalytic coupling), to obtain the novel bisphosphine ligand based on the ferrocene framework. The catalytic complex of this bisphosphine ligand and palladium exhibits excellent catalytic activity and selectivity in the alkoxycarbonylation reactions of terminal alkenes, internal alkenes, and polysubstituted alkenes.

The invention discloses a room-temperature-curable bi-component cyanate adhesive with conductivity and high bonding strength and a preparation method and application of the room-temperature-curable bi-component cyanate adhesive. The bi-component cyanate adhesive is prepared by combining an organic metal catalyst and an active hydrogen catalyst, wherein metal ions of the organic metal catalyst and phenolic hydroxyl groups of the active hydrogen catalyst form a complex, meanwhile, formation of a triazine ring can be effectively accelerated through dual paths of proton transfer and coordination activation, the two catalysts have a synergistic effect, and the volume resistivity and the bonding strength of the cyanate adhesive can be obviously improved. The adhesive is suitable for the fields of high-frequency communication, aerospace electronics or high-power electronic packaging.

The present application relates to a polyurethane composition for preparing a composite material, a polyurethane composite material prepared by the polyurethane composition and a method for preparing the polyurethane composite material. The polyurethane composition comprises: a) an isocyanate component; b) an isocyanate-reactive component; c) a free radical reaction initiator and d) an organic metal catalyst; the hydroxyl value of the isocyanate-reactive component of the component b) is 200 mgKOH / g-700 mgKOH / g, and the molar ratio of isocyanate groups to hydroxyl groups of the composition is 0.6-1.5. The polyurethane composition of the present application has the advantages of long workable time and simple construction process, and the polyurethane composite material comprising the polyurethane resin matrix prepared by the polyurethane composition of the present application has excellent weather resistance and mechanical strength.

The application relates to the field of functional coatings, in particular to a high-temperature ink for a car protective cover and a production process thereof. The high-temperature ink for the car protective cover comprises the following raw materials: a silicon-modified polyimide prepolymer, a composite nano filler, a composite pigment, a low-temperature catalytic curing system, a solvent and an additive; the composite nano filler comprises coated nano cerium oxide and flaky nano boron nitride, wherein the coated nano cerium oxide is nano cerium oxide particles coated with a silicon dioxide layer; the weight ratio of the coated nano cerium oxide to the flaky nano boron nitride is (2-6):1; the thickness of the silicon dioxide layer is 3-10 nm; and the low-temperature catalytic curing system comprises a blocked isocyanate and an organic metal catalyst. The high-temperature ink for the car protective cover and the production process thereof provided by the application successfully solve the industry problems of coating yellowing, adhesion loss and high curing energy consumption in a long-term high-temperature environment through creative material design and process control.

The invention discloses an LBA system polyurethane combined material A and a preparation method thereof. The material A comprises the following components in parts by weight: 8-12 parts of polyether polyol, 40-45 parts of polyester polyol, 20-25 parts of a liquid flame retardant, 5-7 parts of a cross-linking agent, 2-3 parts of a surfactant, 9-10 parts of a catalyst and 0.3-0.5 part of an auxiliary agent. 0.8-1 part of a chemical foaming agent and 9-10 parts of a physical foaming agent; the catalyst comprises a tertiary amine catalyst with large steric hindrance or with an electron-withdrawing functional group and an organic metal catalyst; the auxiliary agent is a tetraalkyl guanidine substance; the surface active agent comprises a silicon type surface active agent and a non-silicone type surface active agent. According to the invention, the tertiary amine catalyst with a specific structure is combined with the tetraalkyl guanidine substance and the silicon and non-silicone surfactants, so that the storage stability and the foam performance after foaming are improved.

The invention discloses preparation of a diphenyl ether diphosphine ligand and application of the diphenyl ether diphosphine ligand in carbonyl esterification reaction, and belongs to the technical field of organic metal catalysis. The novel diphenyl ether diphosphine ligand with large steric hindrance is obtained by transforming a diphenyl ether skeleton through a chemical synthesis method: introducing an electron-donating group with steric hindrance at a 4, 4 'site, carrying out metallization treatment at a 2, 2' site by adopting a strong-basicity lithium reagent, and then reacting with a phosphonium chloride reagent. The diphosphine ligand and palladium catalytic complex shows excellent catalytic activity and selectivity in the alkoxycarbonylation reaction of terminal olefin, internal olefin and polysubstituted olefin.

The present invention aims to provide a moisture-curable composition having high elongation, high strength, and excellent heat resistance. The present invention provides a moisture-curable composition comprising the following components (A) to (C): (A) component: an organic polymer having two or more alkoxysilyl groups within its molecule; (B) component: an organometallic catalyst; (C) component: an aromatic secondary amine compound.

The invention relates to the technical field of catalysts, in particular to a preparation method and application of a polyurethane organic metal catalyst, the polyurethane organic metal catalyst molecule has the following structure, Me1 is selected from the following metal ions: Ce, Co, Ni, Ti, Bi, Zn or Mn; me2 is selected from the following metal ions: Zn, Co, Be or Mn. The polyurethane organic metal catalyst prepared by the preparation method disclosed by the invention not only has targeted catalysis performance, but also has relatively high catalysis efficiency, and is beneficial to improving the stability of the performance of a polyurethane product.

This invention belongs to the field of adhesive technology, specifically relating to a UV / moisture dual-curing adhesive and its preparation method. The dual-curing adhesive comprises the following raw materials in parts by weight: 75-90 parts polyurethane acrylate prepolymer, 10-25 parts curing agent, 1-5 parts photoinitiator, 0.01-0.1 parts organometallic catalyst, 0.1-0.3 parts polymerization inhibitor, 1-3 parts coupling agent, and 3-5 parts fumed silica. The polyurethane acrylate prepolymer is prepared by reacting diisocyanate, diol, and hydroxyl acrylate; the diol is a compound of hydrogenated hydroxyl-terminated polybutadiene and polyether diol; the curing agent has a specific molecular structure containing two isocyanates and one unsaturated double bond, which can respond to UV curing and moisture curing respectively, synergistically achieving photocuring and moisture curing with the polyurethane acrylate prepolymer, ensuring uniform overall curing of the adhesive, no uncured residue, improved mechanical properties, and low allergenicity; viscosity is adjusted by regulating the relative amounts of polyurethane acrylate prepolymer and curing agent.