9 results about "Ketenimine" patented technology

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.

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.

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 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).

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.

This invention discloses a single-component, dual-core gradient sustained-release multifunctional waterborne ceramic coating and its preparation method. The raw material composition and weight ratio are as follows: 40-65 parts of chelated modified nano-silica sol base; 12-30 parts of dual-core gradient sustained-release silica-based microcapsules; 10-25 parts of ketimine-modified siloxane latent curing agent; 8-20 parts of organically modified siloxane auxiliary film-forming agent; 10-28 parts of inorganic pigments and fillers; 0.5-3.5 parts of waterborne additives; and 5-20 parts of deionized water. The advantages are: it achieves a comprehensive breakthrough in the storage stability, low-temperature curing, long-lasting functionality, and comprehensive mechanical properties of single-component ceramic coatings. It adopts a dual mechanism of ketimine-modified siloxane latent curing agent and chelated modified hydroxyl blocking. Under anhydrous conditions at room temperature, the active hydroxyl groups in the system are blocked, and the latent curing agent does not react with the film-forming material, thus achieving long-term storage stability. After construction, when exposed to moisture in the air, the latent curing agent is quickly desealed, releasing active amino groups to catalyze the hydrolysis and condensation of siloxanes, achieving rapid cross-linking and curing at low temperature or even room temperature.

This invention relates to the field of waterproof slurry technology, specifically to a water-based waterproof slurry with strong adhesion and its preparation method, comprising component A and component B. Component A includes a modified polyurethane-acrylate emulsion, a chain extender, and modified nano-calcium carbonate. The modified polyurethane-acrylate emulsion outer shell acts as a hydration barrier, and the intermediate tertiary ammonium-carboxylate ion pair jointly prevents Ca2+ formation. 2+ Reacting with carboxyl groups, the chain extender's ketimine blocks the amino groups, while the modified nano-calcium carbonate's stearic acid layer thickly blocks the CO2 source; the synergistic effect of these three extends the pot life of the slurry. The modified nano-calcium carbonate, triggered by the exothermic reaction of cement hydration, releases CO2 from within the coating film, exposing two functional groups and improving the adhesion strength between the coating and the substrate. After the chain extender accumulates on the surface of the modified polyurethane-acrylate emulsion shell through urea hydrogen bonding and tertiary amine electrostatic attraction, it constructs an organic-inorganic gradient adhesion layer, further enhancing adhesion.