40 results about "Ketenimine" patented technology

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 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.

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.

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 invention relates to preparation and application of polyaryl ketone based on Claisen polycondensation and a functional derivative of the polyaryl ketone. The claisen polycondensation reaction is creatively applied to the synthesis of the polyaryl ketone material. Through precise design of reaction substrates, controllable construction of polymers with different microstructures is realized, and various polymers with clear structures such as linear polyaryl ether ketone, star-shaped polyaryl ketone and fluorescent polyaryl ketone are successfully prepared. Furthermore, through post-modification reactions such as Bayer-Villiger oxidation and ketoamine condensation, the polyaryletherketone is efficiently converted into a series of functional materials such as polyaryletherketone ester, polyaryletherketone imine and polyaryletherketoxime, and the diversity and functionality of the material structure are expanded. Besides, through the hydrolysis reaction of the polyaryl ether ketone ester, the efficient recovery of the micromolecular benzoic acid compound is realized, and the potential of the strategy in the aspects of cyclic utilization and sustainability is embodied. According to the polymerization method based on Claisen condensation, a new way which is mild in condition, simple and convenient to operate and flexible in structure regulation and control is provided for synthesis of a functional degradable polyketone material.

This application relates to the technical field of underwater anti-corrosion materials, specifically disclosing an underwater curing anti-corrosion coating, its preparation method, and its application. The underwater curing anti-corrosion coating provided in this application is prepared from component A and component B. Component A includes the following components: epoxy resin, toughening resin, reactive diluent, modified filler, dispersant, leveling agent, defoamer, and adhesion promoter. The modified filler is prepared by adding the filler to an ethanol solution containing silane coupling agent KH-550 and coupling agent Z-6040, followed by ultrasonic dispersion, drying, and grinding. Component B is selected from one or more of polyamide, phenolic amine, and ketimide. The coating prepared in this application has a short drying and curing time, strong adhesion, and excellent flexibility, impact resistance, and anti-corrosion performance.

The invention relates to a method of forming an epoxy resin curative, derived from a polyamine, and having exceptionally high purity with regard to contamination with said polyamine precursor. The invention also provides high purity epoxy resin curatives, epoxy resin curative compositions comprising said epoxy resin curatives, and uses of the same. In one aspect, the invention provides a method of forming an epoxy resin curative, by contacting a difunctional epoxide compound with one or more polyamine, to provide a diadduct, purifying the diadduct such that the purified diadduct comprises less than 0.1 wt. % of the one or more polyamine, as determined by GC, and using the diadduct to form a Mannich base, amide containing compound, ketimine, or aldimine, for use as an epoxy resin curative.

The present invention is directed to curable film-forming compositions and coating kits comprising: (1) a resinous component comprising: (a) an acrylic polyol; (b) an aliphatic ketimine that is substantially free, essentially free and / or completely free of silane functional groups; and optionally (c) a polyaspartic ester; and (2) a curing agent comprising at least two different aliphatic polyisocyanates. The present invention is further directed to coated structures comprising: (a) a component of a vehicle, building, bridge, industrial protective structure, construction equipment structure, ship, railcar, railcar container, water tower, power line tower, tunnel, oil or gas industry structure, marine structure, aerospace structure, bridge support structure, pipeline, oil rig, storage tank, or wind turbine, wherein the component comprises a metal substrate; and (b) a cured coating formed from the curable film-forming composition described above, applied directly or indirectly to at least one surface of the substrate.

The invention belongs to the technical field of coatings, and discloses an improved nitro-polyurethane mixed paint and a preparation method thereof.The preparation method comprises the following steps that a silyl ether modifier reacts with hydroxyl resin, and a sultone compound reacts with hydroxyl-containing nitrocellulose; preparing modified hydroxyl resin containing a silyl ether protecting group and modified nitrocellulose containing a sulfonate group; the preparation method comprises the following steps: respectively preparing modified isocyanate containing ketimine protecting groups from ketimine and isocyanate; mixing the improved hydroxyl resin, the modified nitrocellulose and an alcohol solvent to form a component A, adding the modified isocyanate into a volatile coordination solvent to form a component B, and uniformly stirring the component A and the component B to obtain the improved nitro-polyurethane mixed paint.

The invention discloses a preparation method and application of an ethylene and polar monomer copolymerized and high-performance polyethylene / carbon fiber composite material, and the high activity, high stability and high molecular weight of a ketimine nickel catalyst indicate the electron donating ability of a catalyst substrate skeleton to a metal center. Methyl in 2, 6-diisopropylaniline provides electron donating capacity and provides steric hindrance, so that the three-dimensional steric hindrance of a metal center is influenced, the electron cloud density of the nickel metal center is increased, the chain transfer rate is slowed down, and the thermal stability of the catalyst is improved. The copolymerization of ethylene and 10-undecylenic acid methyl ester can be realized. Meanwhile, under the industrial temperature condition, polyethylene and carbon fibers are subjected to in-situ polymerization, so that the mechanical property of the composite material is improved. According to the invention, the conditions that the polyethylene has higher mechanical properties and the yield reaches the highest in a low-temperature environment are achieved, and the mechanical properties of the polyethylene are effectively improved by compounding with the carbon fibers at the industrial temperature.

The present application relates to a kind of epoxy resin curing agent for low temperature humid environment and its preparation method, the epoxy resin curing agent structure as shown in formula (I) is as follows: The epoxy resin curing agent of the present application contains ketimine structure, reacts with water in humid environment, releases primary amine on one hand, and cures epoxy resin;On one hand, acyl thiourea class substance is released, and reacts with epoxy resin quickly to release a large amount of heat, further promotes the reaction of amine and epoxy, so that curing reaction can be carried out quickly in humid, low temperature environment;O, S and N atom in acyl thiourea and the π electron of benzene ring are adsorbed on the surface of metal, greatly improve the adhesion of coating, and form strong and dense adsorption film simultaneously, which can prevent corrosion reaction and will not migrate to cause pollution.The curing agent of the present application is especially suitable for the coating of large steel structure in cold and humid environment.

The application discloses a kind of water-based epoxy resin composition and its preparation method and application, the composition includes following weight ratio of each raw material: water-based epoxy resin 35-80%, preferably 40-80%, more preferably 50-70%, ketone imine end-capped hydrolysable silane 5-20%, preferably 5-15%, more preferably 5-10%, cyclic carbonate 1-20%, preferably 5-20%, more preferably 5-10%, water-based secondary amine curing agent 10-50%, preferably 10-40%, more preferably 20-40%. The composition not only has longer operation time, but also can be dried completely in a very short time after construction, and exhibits better adhesion on metal and concrete surface, and has very good water resistance and salt fog resistance.