61 results about "Ketenimine" patented technology

The invention discloses a polyether-ether-ketone-based composite material with low reflection and high electromagnetic shielding effectiveness and a preparation method of the polyether-ether-ketone-based composite material, and belongs to the technical field of electromagnetic shielding materials. The problems that an existing electromagnetic shielding material is high in reflection coefficient, insufficient in shielding effectiveness, poor in high temperature resistance and corrosion resistance and difficult to adapt to severe environment service are solved. The composite material is composed of a porous conductive substrate and an asymmetric conductive layer. Wherein the porous conductive substrate is formed by blending a soluble ketimine type polyether-ether-ketone solution and a conductive filler suspension and then carrying out non-solvent induced phase separation and acidification reduction reaction, the electric conductivity is 2.8 * 10 <-4 >-0.1839 S / cm, and the porosity is 80%-90%; the asymmetric conductive layer is plated on the surface of one side of the porous conductive substrate, and the asymmetric conductive layer is made of nickel-phosphorus alloy. The composite material significantly reduces the electromagnetic wave reflection coefficient through an absorption-reflection-reabsorption mechanism, has high electromagnetic shielding effectiveness and excellent high temperature resistance and corrosion resistance, and is suitable for serving in a severe environment.

The embodiment of the invention relates to the technical field of insulating adhesives, and discloses an insulating sealing coating adhesive which comprises 60-80 parts of a modified styrene-butadiene-styrene block copolymer, 0.3-1 part of a ketimine curing agent, 2-8 parts of an aromatic amine curing agent, 3-8 parts of methyl silicone oil and 12-26 parts of petroleum ether, wherein the modified styrene-butadiene-styrene block copolymer is obtained by epoxidation of a styrene-butadiene-styrene block copolymer (SBS), the molecular weight of the styrene-butadiene-styrene block copolymer is 7000-11000, the substance amount fraction of a PB end (polybutadiene chain segment) is 70-85%, and the ratio of a branched chain structure to a straight chain structure in the PB end is 1: 2-1: 3. The insulation sealing coating adhesive has the characteristics of high reliability and uniform coating in multiple axial directions, especially in the vertical direction (namely the z-axis direction) through the structural characteristics of the insulation sealing coating adhesive and the compounding of the insulation sealing coating adhesive and a multi-element curing agent, is convenient to spray and is beneficial to application to precise components.

This invention provides a high-solids anti-rust primer suitable for all seasons and its preparation method. The anti-rust primer comprises component A and component B. Component A includes the following raw materials in parts by weight: 30-40% bisphenol F epoxy resin, 1-10% reactive diluent, 1-8% liquid carboxyl-terminated nitrile butadiene rubber (CTBN), 0.1-0.3% triphenylphosphine, 0.1-0.6% dispersant, 0.2-0.6% defoamer, 1-5% modified chopped glass fiber, 40-50% pigments and fillers, 0.7-1.3% thixotropic agent, and 3-5% solvent. Component B includes the following raw materials in parts by weight: 50-70% amine curing agent, 2-5% hyperbranched epoxy resin, and 25-45% modified ketimide curing agent. The anti-rust primer of this invention has the advantages of high solids content and high flexibility, and can be applied to damp surfaces and in ambient temperatures ranging from -10 to 40°C. Furthermore, the prepared anti-rust primer, as a coating, can be used as a rust-preventive primer for multiple parts of the ship, from the bottom to the hull, and has significant benefits in improving ship painting efficiency and reducing fugitive VOC emissions during the painting process.

This invention relates to a simple method for modifying β-ketoimine ligand precursors, wherein L... Ph The reaction involves a lithium compound with H2 solution; then a haloalkane is added for C-C coupling; followed by the addition of an acid solution to complete the modification of the β-ketoimine ligand precursor, yielding a terminally alkylated ketoimine. This invention relates to a simple method for modifying β-ketoimine ligand precursors, specifically involving the removal of the proton at the α-position of the β-ketoimine ligand precursor from commercially available n-butyllithium to form a deprotonated β-ketoimine lithium compound, followed by C-C coupling to achieve alkylation at the α-position of the ketocarbonyl group, thus providing a convenient modification of the β-ketoimine ligand precursor.

The invention discloses a beta-ketimine type binuclear aluminum complex and a preparation method thereof. The binuclear aluminum complex can be used for catalyzing ring opening polymerization of caprolactone, lactide, glycolide, valerolactone, butyrolactone or ethylene carbonate. The invention further discloses a preparation method and application of the binuclear aluminum complex. The preparation method is simple, the reaction condition is mild, the prepared beta-ketimine type binuclear aluminum complex is used as a catalyst, the catalytic activity is high, the stability is good, the service life is long, the molecular weight distribution of the obtained polymerization product is narrow, and the beta-ketimine type binuclear aluminum complex can be well applied to the ring-opening polymerization reaction of cyclic ester.

The application discloses a curing agent and a preparation method and application thereof. The curing agent is obtained by reacting diisocyanate and polyalkylene ether glycol in the presence of a disulfide bond-containing compound and a ketimine compound. The curing agent contains a dynamic covalent bond, and a self-repairing epoxy resin can be prepared by mixing the curing agent with a common epoxy resin.

An object of the present invention is to provide a resin composition that has excellent impregnability into fibers, enables favorable continuous production of a prepreg, and enables production of a prepreg that enables favorable production of a molded article.SOLUTION: A three dimensional crosslinked structure in which a compound (A) having two or more acetoacetic acid ester groups, aldehyde groups, or triketone structures alone or in combination in a molecule and an amine compound (B) having two or more primary amino groups in a molecule are bonded to each other, and a ketimine compound (D) in which at least one primary amino group of the amine compound (B) and a ketone group of the ketone compound (C) are condensation-bonded, wherein among the primary amino groups of the amine compound (B) constituting the ketimine compound (D), a proportion of the primary amino groups bonded to the ketone compound (C) is 1kPa% or more, the ketone compound (C) having a steam pressure at 20 °C of 0. 50mol or more.SELECTED DRAWING: None

The present invention discloses an azide-containing asymmetric ortho-diamine compound and its synthesis method, belonging to the field of organic synthesis. Under the action of adding a hypervalent iodine reagent and in an inert gas atmosphere, a three-component reaction of an olefin, a diaryl ketimine compound and an azide reagent is realized, completing the asymmetric diamination reaction of the olefin and simultaneously constructing a technical solution for two C-N bonds. The reaction conditions are extremely mild, the olefin raw materials are widely sourced and inexpensive and easily available, the experimental operation is simple and safe, and it is easy to apply and expand; commercially available benzophenone imine and azide reagent are used; the azide group and the imine can be further converted into primary amine compounds, which have very good application prospects in the synthesis of natural products and drug molecules, saving a large amount of research time and shortening the production cycle, and having a foreseeable market commercialization prospect.

The invention relates to the technical field of asphalt compositions, in particular to waterborne epoxy resin modified emulsified asphalt and a preparation method thereof.The waterborne epoxy resin modified emulsified asphalt is formed by mixing and curing a two-component system, the two-component system comprises a component A and a component B. The component A comprises emulsified asphalt, epoxy resin and ketimine, and the component B comprises emulsified asphalt and an amine curing agent. The mass ratio of the component A to the component B is 1: (0.8-1.2), the component A is prepared from, by weight, 190-210 parts of emulsified asphalt, 45-55 parts of epoxy resin and 25-35 parts of ketimine, and the component B is prepared from, by weight, 210-230 parts of emulsified asphalt and 25-35 parts of amine curing agent.By adjusting the proportion of the component A to the component B, the strength and ductility of the material are remarkably improved.

The invention discloses a polyurea coating as well as a preparation method and application thereof. The polyurea coating comprises fluorinated ketimine and a hexamethylene diisocyanate isocyanurate tripolymer, and the preparation method of the polyurea coating comprises the following steps: uniformly mixing the fluorinated ketimine and the hexamethylene diisocyanate isocyanurate tripolymer according to the NCO (isocyanate) index of 1.05-1.10 to obtain the polyurea coating. The polyurea coating is long in curing time and convenient to construct, a formed coating is high in hydrophobicity, excellent in mechanical property, excellent in weather resistance and excellent in corrosion resistance, long-acting protection can be provided for an outdoor steel structure, and the polyurea coating is simple in preparation method, low in production cost and suitable for large-scale industrial production and application.

The invention discloses a method for synthesizing a chiral pyrazolone imine derivative based on an asymmetric aza-Henry reaction catalyzed by an organic catalyst, which comprises the following steps: placing a pyrazolone imine compound and a nitroalkane compound in a solvent, adding the organic catalyst, and reacting at-78-60 DEG C while stirring to prepare the target product chiral pyrazolone imine derivative. Or placing the pyrazolone imine compound and brominated nitromethane in a solvent, then adding an organic catalyst, carrying out a stirring reaction at-78 to 60 DEG C to prepare a chiral pyrazolone imine derivative, and further carrying out debromination to obtain the target product, namely the chiral pyrazolone imine compound. The asymmetric aza-Henry reaction of the pyrazolone imine compound and the nitroalkane compound or the bromo-nitromethane is successfully realized on the basis of the small organic molecule catalyst, and the asymmetric aza-Henry reaction has the advantages of low catalyst consumption, high reaction rate (the fastest reaction rate is 0.5 h), high enantioselectivity (the highest reaction rate reaches 96% ee), good universality of reaction substrates and the like.

The present application belongs to the technical field of epoxy resin curing agent, and particularly relates to a compounded curing agent for epoxy resin, a preparation method and application thereof. The compounded curing agent is compounded by a mussel-mimic curing agent and a ketone imine curing agent. The mass ratio of the mussel-mimic curing agent to the ketone imine curing agent is (5-9):(1-5). The mussel-mimic curing agent is an amine curing agent containing catechol groups and cashew phenol long chains, and the ketone imine curing agent is a water-activated latent curing agent containing imine groups. The present application combines the strong adhesion, high toughness and high hydrophobicity of the mussel-mimic curing agent with the water-activated latency, storage stability and adjustable curing speed of the ketone imine curing agent. The two curing agents have no antagonism and synergistically enhance each other, solving the technical defects of single curing agent. The prepared adhesive has the comprehensive advantages of storage stability, convenient construction, high strength, good toughness, excellent hydrophobicity and strong seawater resistance.

This invention belongs to the field of organic synthesis technology, and discloses a method for photocatalytic synthesis of quaternary carbon 1-diamine, comprising the following steps: (1) adding magnetic electrodes, raw materials, and solvent sequentially into a photoreaction tube with an outer condenser, blowing argon gas through a fine needle, and then sealing the tube. (2) Circulating condenser water through the outer side of the photoreaction tube, placing the tube on a magnetic stirrer, turning on the magnetic stirrer, and simultaneously irradiating it with a blue LED light. (3) Vacuum concentrating the mixture obtained in step 2, and separating it by column chromatography to obtain the target compound, quaternary carbon 1-diamine. This invention utilizes inexpensive and readily available indigo-derived ketimine and N,N-xylene and its derivatives as raw materials, and successfully synthesizes quaternary carbon 1-diamine compounds under visible light catalysis conditions through the combined catalytic action of a photocatalyst and Brønsted acid. The conditions of this invention are mild, and the raw materials are inexpensive, readily available, and all are commercially available reagents.

The application relates to the technical field of building structure reinforcement, and discloses a construction method for reinforcing a brick-concrete structure by using carbon fiber and outer steel plates in cooperation, which comprises the following steps: performing interface pretreatment on a base material and a steel plate; mixing an A component containing epoxy resin and a B component containing a ketimine latent curing agent, and coating the mixture on a bonding surface; adhering the brick-concrete base material, carbon fiber cloth and the outer steel plate, applying pressure and standing still to make the glue solution secrete and penetrate inwards under capillary negative pressure; heating the outer steel plate by using an electromagnetic induction device to trigger cross-linking locking of a rigid network in a superficial layer; removing the device and curing, so that a deep penetration phase is hydrolyzed and solidified by using pore water of the base material. The gradient cross-linking network with decreasing rigidity from outside to inside is constructed in situ in the base material, free water which hinders bonding is consumed, interface stress concentration is relieved, and brittle peeling damage of the reinforcing layer is avoided.

The present invention pertains to compounds that inhibit Flavivirus NS2B-NS3 proteases and are potent and selective inhibitors of the West Nile virus and Zika virus. The compounds of the invention can be used alone or in combination with other agents to treat infections caused by these viruses. Additionally, the invention relates to pharmaceutical compositions containing these compounds.

The invention relates to the technical field of concrete grouting and repairing, and particularly discloses an epoxy crack pouring adhesive and application thereof. The epoxy crack pouring adhesive is prepared from the following raw materials: epoxy resin, a normal-temperature curing agent, a polyvinyl alcohol coated ketimine microcapsule and a high-temperature latent curing agent, the curing temperature of the high-temperature latent curing agent is 80-100 DEG C. The polyving akohol-coated ketimine microcapsule is used as a latent curing agent, has certain storage stability at room temperature, and can quickly perform curing reaction under the combined action of water and heat to realize controllable curing. The temperatures required by the curing reaction of the normal-temperature curing agent, the polyvinyl alcohol-coated ketimine microcapsule and the high-temperature latent curing agent with the epoxy resin are sequentially increased, so that a stepped curing system is formed, the operation time is relatively long, the curing efficiency is good, and implosion is not easy to occur in the stirring and crack pouring process; through reasonable matching of different curing agents, the epoxy crack pouring adhesive has good mechanical strength and high-temperature durability after being cured.

The invention provides an asymmetric synthesis method of a chiral bisindole compound, and belongs to the technical field of organic synthesis. According to the present invention, the indole compound and the chiral sulfinyl ketimine compound are adopted as the substrates, and the novel asymmetric Friedel-Crafts reaction is performed under the conditions of bimetallic catalysis and coordination so as to achieve the efficient synthesis of the chiral bis-indole compound; the bimetallic catalytic system has the advantages of mild reaction conditions, excellent stereoselectivity, wide substrate applicability, high economic benefits and the like, provides an efficient synthesis way for synthesis of chiral bisindole compounds, and has a good industrial prospect.

This invention provides a mononuclear manganese complex containing acetylacetone and β-ketoimine ligands, and a method for its preparation. This invention synthesizes a novel mononuclear divalent manganese complex Mn. II (acac)2(Hki)2. This compound is readily soluble in a variety of organic solvents, exhibits good stability, and is not easily deliquescent, making it an ideal source of divalent manganese. This invention employs a solution method to synthesize the aforementioned mononuclear divalent manganese complex, utilizing inexpensive and readily available raw materials; the reaction conditions are mild and can be carried out at room temperature; only water is used as the solvent, making it environmentally friendly; the reaction product is singular, easily purified, and yields the target compound in high quantities. This invention also synthesizes a novel mononuclear trivalent manganese complex, Mn. III (acac)2(ki), which differs from manganese acetylacetonate (III) in that one acetylacetonate anion is replaced by a ⁻-ketoimine anion. Mn III (acac)2(ki) is soluble in a variety of organic solvents and is an ideal trivalent manganese source reagent for anhydrous organic reactions.

The invention belongs to the field of preparation and application of metal complex catalysts, and discloses a mononuclear double N-alkoxy-beta-ketimine magnesium complex as well as a synthesis method and application thereof. The mononuclear double N-alkoxy-beta-ketimine magnesium complex is applied to catalysis of ring-opening polymerization of caprolactone, the mononuclear double N-alkoxy-beta-ketimine magnesium complex is used as a catalyst, caprolactone is used as a raw material, bulk polymerization is performed at 110 DEG C under the protection of anhydrous and anaerobic inert gas, and the mononuclear double N-alkoxy-beta-ketimine magnesium complex is obtained. And the ring opening polymerization of caprolactone can be catalyzed to prepare polycaprolactone without the participation of a solvent and a cocatalyst. The catalyst is low in toxicity, simple in preparation method, novel in structure and high in catalytic activity, the dosage of the catalyst is low in the catalysis process, and high-molecular-weight polycaprolactone can be obtained.

This cationic electrodeposition coating composition contains an aminated epoxy resin, a blocked polyisocyanate curing agent, and an inorganic pigment. The aminated epoxy resin has an amination site (a) where an epoxy ring of a raw material epoxy resin has been modified by an amine compound (x), and a cap site (c) where a terminal epoxy ring of the raw material epoxy resin has been modified by a cap compound (y) having a functional group, other than an amino group, that is capable of reacting with an epoxy ring. The amine compound (x) has at least one of a primary amino group and a secondary amino group and has no ketimine structure. The cap compound (y) contains an aromatic compound (y1) having one phenolic hydroxy group as the functional group and two or more aromatic rings. The amination site (a) is formed by the epoxy ring being opened by at least one of the primary amino group and the secondary amino group. The cap site (c) includes an aromatic cap site (c1) formed by the terminal epoxy ring being opened by the phenolic hydroxy group.

The application provides a ketimine zinc complex and a preparation method and application thereof. The structural formula of the ketimine zinc complex is as follows: wherein R is any one of C2-C4 linear alkyl and derivatives thereof, C2-C4 branched alkyl and derivatives thereof. The ketimine zinc complex has the characteristics of easy synthesis (high yield), high catalytic activity for ring-opening polymerization of lactide to obtain high molecular weight PLA and high catalytic activity for ring-opening polymerization of lactide.

To provide a one-part epoxy resin composition that is superior in low viscosity, tack-free drying property, and smoothness of the resulting coating film, and a cured product thereof, an adhesive, a coating, a primer for concrete, and a sealant.SOLUTION: The present invention provides a one-part epoxy resin composition comprising: an epoxy resin (A); and a latent epoxy resin curing agent (B), which includes a ketimine (B1) produced by reacting a diamine represented by the general formula (1) and a ketone having 4 to 9 carbon atoms, and a cured product thereof, an adhesive, a coating, a primer for concrete, and a sealant. H2 N-CH2-X-CH2-NH2 (1) (In the formula (1), X represents a phenylene group or a cyclohexylene group).SELECTED DRAWING: None

The invention provides a polyisocyanate composition with stable storage and application thereof. The polyisocyanate composition is a polyisocyanate mixture containing structures such as isocyanurate, carbamate, allophanate, biuret, imino oxadiazinedione, uretdione, carbodiimide, uretonimine and the like which are obtained by self-polymerization of an isocyanate monomer under the action of a catalyst or reaction of the isocyanate monomer with alcohol and water, and the polyisocyanate composition is prepared from the polyisocyanate mixture containing structures such as isocyanurate, carbamate, allophanate, biuret, imino oxadiazinedione, uretdione, carbodiimide, uretonimine and the like. Carrying out separation treatment through an evaporator to remove unreacted isocyanate monomers, diluting heavy components obtained through separation through a solvent or not, and packaging to obtain a product; wherein the volume fraction content of oxygen in the gas phase of the residual space of the packaging product is 0.5-25%, and the storage viscosity of the obtained polyisocyanate product is stable.

The present invention relates to the technical field of polymer synthesis, and particularly relates to a polyarylether polymer containing a ketimine structure and a preparation method thereof. The present invention provides a polyarylether polymer containing a ketimine structure, having the structure shown in formula (I); in formula (I), n≥10; Ar is selected from aromatic groups; R1 is selected from substituted or unsubstituted aromatic groups, or substituted or unsubstituted alkyl groups. The present invention modifies a bisphenol monomer containing a benzophenone structure to prepare a bisphenol monomer containing a ketimine structure. The reactivity of the modified bisphenol monomer in the polymerization reaction increases, and then polymerization with a dihalogen monomer can obtain a soluble high-molecular-weight polyarylether polymer containing a ketimine structure. At the same time, the yield of the polyarylether polymer containing a ketimine structure obtained by the preparation method provided by the present invention is relatively high.

The invention discloses a chiral polycyclic spiro compound, and belongs to the technical field of organic chemical synthesis, the chiral polycyclic spiro compound is a compound assembled with benzothiophene ketone, trifluoromethyl pyrrolidine and benzothiophene sulfone substructures; the preparation method comprises the following steps: dissolving ketimine (I) and benzothiophene sulfone (II) derived from trifluoroethyl benzo [b] thiophene-2, 3-diketone in an organic solvent, then adding alkali and a metal-ligand compound, and after the reaction is finished, separating and purifying to obtain a product (III); the compound provided by the invention has four continuous chiral centers, simultaneously contains benzothiophene ketone, trifluoromethyl pyrrolidine and benzothiophene sulfone substructures with pharmacodynamic functional groups, can provide more candidate molecules for research and development of new drugs and screening of drugs, and shows a better application prospect in the anti-tumor aspect; the preparation method has the advantages of novelty, simplicity, simplicity in operation, mild reaction conditions, high yield, high stereoselectivity and the like.

The present disclosure provides an intumescent coating composition comprising: (a) a molecule comprising one or more acyl acyloxy groups; (b) an epoxy resin; (c) a molecule comprising a ketimine and / or aldimine group; and (d) a swelling agent. The intumescent coating composition may have a surface dry time (ASTM-D1640-2014) of less than 200 minutes at 23 DEG C and 40% relative humidity.

The application belongs to the field of metal complex catalyst preparation and application, and discloses a kind of tetranuclear β Zinc ketimine complex and synthesis method and application.Tetranuclear β Zinc ketimine complex is applied to catalyze caprolactone ring-opening polymerization, and tetranuclear β Zinc ketimine complex is used as catalyst, caprolactone is used as raw material, under the protection of waterless, oxygenless and inert gas, 110 ℃ bulk polymerization, without solvent and cocatalyst participation, can catalyze caprolactone ring-opening polymerization to prepare polycaprolactone.The catalyst is low toxic, the preparation method is simple, the structure is novel, has good catalytic activity to caprolactone polymerization, the catalyst consumption is low in the catalytic process, and the molecular weight of obtained polymer is high (83893~130186 g / mol).

The invention relates to the technical field of high polymer material bonding, and discloses a high-performance moisture-curing polymer primer and a preparation method thereof, the preparation method comprises the following steps: synthesizing a ketimine curing agent, respectively preparing polymer resin, a functional auxiliary agent, a solvent, a curing agent and a filler into two mixed solutions, and mixing to obtain the high-performance moisture-curing polymer primer. And adding a fiber material, mechanically stirring and filtering to obtain the high-performance moisture-curing polymer primer. According to the primer, hydroxyl, amino and other active polar groups are generated through hydrolysis of the curing agent in moisture, premature reaction of isocyanate groups is inhibited, and slow-release storage of the active groups is achieved; after construction, active groups accumulated on an interface can quickly react to generate carbamate groups, carbamido groups and the like, and the content of polar groups such as the carbamate groups, the carbamido groups and the like is further increased by functional polymer resin introduced into a system, so that stable reaction activity is kept for a long time after brushing, and long-acting bonding is realized.

The application provides a process method and an ion processing machine for heparin surface treatment of artificial lenses, effectively solves the problem of lacking technical breakthrough of heparin surface treatment of artificial lenses, and comprises the following steps: placing the dried artificial lenses into an ion processing machine for surface ion processing, which is used for cleaning the surface and generating active free radicals; soaking the artificial lenses with the generated active free radicals after ion processing in a grafting solution containing aldimine or ketimine groups to obtain artificial lenses containing aldimine or ketimine groups through reaction, the soaking time of the artificial lenses with the generated active free radicals in the grafting solution containing aldimine or ketimine groups is 0.1h-78h; soaking the artificial lenses containing imine groups in an aldehyde-based heparin solution; and the soaking time of the artificial lenses with aldimine or ketimine groups in the aldehyde-based heparin is 0.1h-78h. The application provides a specific process method for heparin surface treatment of artificial lenses, and realizes the technical breakthrough of surface heparin treatment.

The present application discloses a preparation method of 2-aryl-3-ketoimino tetrahydrofuran compounds with novel structures in the field of organic synthesis technology. The reaction general formula is as follows: Specifically, 2-aryl-3-ketoimino tetrahydrofuran compounds are prepared in one step from 4-aryl-3-butenol and diaryl ketimine under organic electrochemical synthesis conditions. This method has mild conditions, does not require additional equivalent chemical oxidants and additives, has good compatibility of reaction functional groups, and the products are easily further derivatized and transformed, providing a green and efficient synthesis method for 2-aryl-3-amino-substituted tetrahydrofuran compounds.