61 results about "Organometallic catalysis" patented technology

The invention provides a copolymerization type epoxy modified emulsified asphalt material for an asphalt pavement adhesive layer and a preparation method of the copolymerization type epoxy modified emulsified asphalt material. The copolymerization type epoxy modified emulsified asphalt material is obtained by mixing modified asphalt and water and then performing high-speed shearing, the modified asphalt comprises the following raw materials in parts by weight: 100 parts of matrix asphalt, 20 parts of an oxidizing agent, 1-2 parts of phosphoric acid, 120-240 parts of polyether polyol, 0.6-2 parts of hydrogen, 4-7 parts of a metal catalyst, 8-24 parts of isocyanate, 2-3.2 parts of an organic metal catalyst and 20-48 parts of epoxy resin. The long-chain polyether polyol is used as a hydrophilic group, so that the emulsification difficulty of the modified asphalt can be effectively reduced, and self-emulsification of the asphalt is realized; the unsaturation degree of the modified asphalt is reduced through hydrogenation reaction, the influence of external environment factors such as water, oxygen and high and low temperatures is reduced, the weather resistance of the asphalt is improved, and the service life of the adhesive layer is prolonged; the epoxy resin is grafted on modified asphalt molecules, so that the cohesive strength and modulus of the modified asphalt can be effectively improved, the tensile strength is far higher than 0.8 MPa of conventional emulsified asphalt, and the service life is prolonged.

This invention relates to a polyurethane microcapsule emulsion, its preparation method, and its application. The raw materials for preparing the polyurethane microcapsule emulsion, by weight, include: 30-50 parts of unsaturated polyester polyol, 10-25 parts of isocyanate monomer, 3-6 parts of hydrophilic monomer, 2-5 parts of small molecule alcohol chain extender, 1.5-5 parts of neutralizing agent, 0.1-0.5 parts of organometallic catalyst, 20-50 parts of organic solvent, 5-15 parts of pesticide active ingredient, 3-10 parts of C6-C15 straight-chain or branched-chain olefin monomer, 0.1-0.5 parts of initiator, and 100-160 parts of water. The polyurethane microcapsule emulsion provided by this invention solves the problems of low crosslinking density, simple structural topology, insufficient hydrophobicity, and poor encapsulation stability of existing pesticide microcapsules, improving the controlled-release performance, capsule wall density, and emulsion system stability of the polyurethane microcapsule emulsion.

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 invention refers to the chemical field, in particular to homogeneous organometallic catalysis in water-rich media, more particularly to the transformation of the pheromone 3-methyl-2-cyclohexen-1-ol in the presence or absence of [RuClCp(PTA)2] and [RuCp(H2O-κO)(PTA)2]CF3SO3

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.

To provide a stabilized moisture-curable alkoxysilyl-containing polyurethane polymer composition that is useful as a component in the preparation of coatings, adhesives, sealants, consumer goods and industrial products.SOLUTION: An alkoxysilyl-containing polyurethane polymer composition is prepared using a urethane-forming organometallic catalyst, and then stabilized against moisture exposure by addition of a mercapto-containing compound. The stabilized moisture-curable alkoxysilyl-containing polyurethane polymer composition is activated for moisture curing by addition of hydrolysis and condensation catalysts.SELECTED DRAWING: None

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 provides a water-resistant polyurethane emulsion as well as a preparation method and application thereof. The water-resistant polyurethane emulsion is prepared from the following raw materials in parts by weight: 20 to 40 parts of isocyanate monomer, 50 to 75 parts of polyhydric alcohol, 5 to 11 parts of hydrophilic chain extender, 1.2 to 2.4 parts of micromolecular alcohol chain extender, 0.1 to 0.3 part of organic metal catalyst, 10 to 30 parts of solvent A, 3 to 6 parts of neutralizer and 100 to 170 parts of water, wherein carboxymethyl in the hydrophilic chain extender is connected with sulfuryl; the water-resistant polyurethane emulsion provided by the invention has good emulsion stability, and a formed coating has excellent water resistance, light transmittance, adhesive force, scratch resistance and hardness.

There are many benefits to organometallic catalysis, especially in homogeneous catalysis for C(sp2)-H bond activation and new C-C bond formation reactions. These catalysts, which are mainly transition metal complexes with organic ligands, are very reactive and selective, which increases the range and effectiveness of different synthetic transformations. Their capacity to activate C-H bonds under mild reaction conditions is a key advantage as it allows for the direct C-H alkylation of aryl ketones without the need for transient functional groups. This reduces utilization of chemicals, cost and energy used in addition to streamlining synthetic routes. Furthermore, complex molecular architectures with high stereo- and regioselectivity may be formed with the help of organometallic homogenous catalysts, making precise synthesis of complex molecules possible. The present catalyst is easy to use, industrially scalable, recyclable, and provides excellent yields of C-H alkylated products from nonactivated alkyl halides. The reported methods need the use of excess (2-6 equivalent) of alkyl halides but this catalyst performs the catalytic reaction in the stoichiometric quantities of aryl ketone and alkyl halides.

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.

Disclosed herein is a method for effecting atom or group transfer polymerization comprising polymerizing one or more radically-polymerizable monomers in the presence of a system comprising an electrically active micro-organism, a transition metal catalyst, one or more radically-polymerizable monomers, and a radical initiator. Micro-organism respiratory electron flux is harnessed to control the performance of a metal-catalyzed polymerization. The bacterial electron transport pathways of the electroactive micro-organisms can be engineered to tune and adapt various function of the electroactive micro-organism and its role in polymerization. Polymerization may be accomplished under aerobic or anaerobic conditions. Freshly cultured micro-organisms or lyophilized micro-organisms may be used to direct polymerization.

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 invention relates to the technical field of preparation of roadbed soil stabilizers, in particular to a roadbed soil stabilizer with waterproof and foundation strengthening functions. Comprising the following components: 18-22 parts of a film-forming waterproof agent, 8-12 parts of a chemical binder, 10-11 parts of a bio-based binder, 7-10 parts of a curing accelerator, 1-2 parts of an organic metal catalyst, 3-4 parts of a thickening agent, 2-3 parts of an intelligent rheology modifier, 3-4 parts of a nano reinforcing agent, 3-4 parts of a surfactant and 40-41 parts of a solvent. The film-forming waterproof agent is one of an organic silicon resin emulsion, an acrylate emulsion or a fluorocarbon resin emulsion; the binder is one of a polyurethane elastomer prepolymer, a polyvinyl acetate emulsion or an epoxy resin emulsion; in the scheme, through the synergistic effect of various components such as the organic silicon resin emulsion and the polyurethane elastomer prepolymer, a waterproof film is formed on the surfaces of soil particles, and meanwhile, a liquid film is formed among the particles and cured into a closed cavity, so that moisture permeation is effectively prevented, and the permeability is greatly reduced.

The invention belongs to the field of organic synthesis. The method comprises the following steps: mixing 1, 2-cyclohexane dicarboxylic acid anhydride, alkyl bromide and an organic solvent (N, N-dimethylacetamide) under the action of a transition metal catalyst bis ((1, 5-cyclooctadiene) nickel), a reducing agent (zinc powder) and a nitrogen ligand (2, 2 '-bipyridine ligand), and carrying out electrophilic reduction cross-coupling reaction to synthesize the gamma-alkyl ketonic acid compound. The cheap nickel is used as the metal catalyst, the use of an organic metal catalyst is avoided, the synthesis method is simple, the synthesis steps are few, the operation is convenient, the application range is wide, and various gamma-alkyl ketonic acid compounds can be synthesized.

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.

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 invention relates to an injectable thermal contacting and filling material, which consists of a component A and a component B, the component A comprises a silylated prepolymer or a mixture of silylated prepolymers, and the silylated prepolymer is based on polyurethane, polyol / diol or polyacrylate; a plasticizer which is a multifunctional carboxylic acid ester; a wetting and dispersing additive having at least one amine value of greater than 20 mg KOH / g as determined according to DIN 19645; a mixture of functionalized organosilanes; znO and another thermal conductive filler or a mixture of a plurality of thermal conductive fillers. The component B comprises a plasticizer which is a multifunctional carboxylic ester; a wetting and dispersing additive having at least one amine value of greater than 20 mg KOH / g as determined according to DIN 19645; a thermally conductive filler or a mixture of a plurality of thermally conductive fillers; water and an organometallic catalyst. The volume mixing ratio of the component A to the component B is (1: 1)-(10: 1).

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.