105 results about "Ketenimine" patented technology

The invention relates to a solvent-free type epoxy zinc rich primer and a preparation method of the solvent-free type epoxy zinc rich primer. The primer comprises an ingredient A and an ingredient B, wherein the ingredient A mainly comprises the following ingredients in parts by weight: 20 to 50 parts of liquid epoxy resin, 5 to 20 parts of reactive diluents, 60 to 80 parts of zinc powder and 4 to 10 parts of adhesion promoters, the ingredient B comprises the following ingredients in parts by weight: 20 to 60 parts of cashew modified amine, 20 to 60 parts of ketimine, 0.5 to 1.5 parts of adhesion promoters and 5 to 20 parts of reactive diluents, and the weight ratio of the ingredient A to the ingredient B is (4.5-5.5):1. The solvent-free type epoxy zinc rich primer disclosed by the invention has no volatile solvents and is economic and environmental-friendly.

The invention discloses an organophosphorus active flame-proof epoxide resin solidifying agent amino phosphonate ester and the preparing method. The amino phosphonate ester comprises the following parts: 3:1:1:1 absolute ethyl alcohol, phsophorus trichloride, organic amine (the structural formula is H2N-R-NH2)and acetone. The organic amine is diethylenetriamine, triethylene tetraamine, tetraethylene pentamine or 4, 4-diaminodiphenylmethane. The method comprises the following steps: 1, synthesizing diethyl phosphate with alcohol and phsophorus trichloride; 2, generating ketoimine with acetone and the organic amine by adding the anhydrating agent; 3, generating amino phosphonate with diethyl phosphate and ketoimine. The oxygen index of the product is more than 20 and less than 34.6. The invention is provided with the simple method and the simple operation.

The invention discloses a method for asymmetric catalytic synthesis of a spirocyclic tetrahydrocarbazoline compound, comprising the steps: by taking 3-alkenyl indole and isatin derived ketimine as raw materials, a complex formed by chiral amine oxide and nickel trifluoromethane sulfonate as a catalyst and dichloromethane as a solvent, performing reaction on the raw materials at (-30) DEG C to (-10) DEG C at the normal pressure for 96-192h; then adding 6.0M HCl(solution) and performing reaction at 30 DEG C for 4-48h to obtain the chiral spirocyclic tetrahydro carbazoline compound, wherein the yield of the chiral spirocyclic tetrahydro carbazoline compound can reach up to 95%, and the enantioselectivity can reach up to 99%. According to the method provided by the invention, the catalytic reaction conforms with the green chemistry atom economy and has a good prospect in industrial application, thereby providing a new path for asymmetric synthesis of compounds with high anti-malarial activity (NITD609).

The invention discloses an N-sulfonylketimine compound and the preparation method thereof. The preparation method includes that alkine compound shown in formula (I) and a sulfonamide compound shown in formula (II) react in the presence of a MLYn transition metal catalyst in an inert organic solvent at 35-140 DEG C; and the reaction solution is subjected to a post-treatment to obtain the N-sulfonylketimine compound shown in formula (III). The method has the advantages that the reaction conditions is mild; the operation is convenient; the product quality is good; the yield is high; the environment friendliness is ensured; the whole production process is substantially harmless; and the operators are safe; the reaction is in accordance with the atom economic principle and has high utilization rate of the raw material. Since the N-sulfonylketimine is an excellent raw material for preparing pharmaceuticals, agricultural chemicals and chemical products, the preparation method has wide industrial application prospect.

The invention relates to a single-component epoxy primer and a preparation method thereof. The epoxy primer disclosed by the invention is a single-component system, and is prepared from the following raw materials in parts by weight: 100 parts of epoxy resin, 30-70 parts of ketimine curing agent, 30-100 parts of solvent, 10-20 parts of rutile SiO2, 20-30 parts of anti-rust pigment, 5-10 parts of mica powder, 3-8 parts of silane coupling agent, 2-6 parts of gaseous phase SiO2, 2-7 parts of dispersant, 0.5-5 parts of flatting agent and 0.5-5 parts of defoamer. The single-component epoxy primer is mainly applied to the primers with smooth substrate (galvanized plate, tin plate, aluminum alloy and the like) surfaces, the coating has excellent adhesive force, flexibility and penetration resistance, a firm adhesive force is provided for a heavy-duty composite coating, and the single-component epoxy primer has the characteristics of being convenient in single component use, cured at room temperature and the like.

The invention relates to a preparation method of a functional polycarboxylate-type water reducing agent for resisting a flocculating agent in machine-made sand. The preparation method comprises the following specific steps: firstly, modifying imide under the action of an amine catalyst to obtain o-phenyl ketene imide; then enabling ketene imine, an unsaturated carboxylic acid derivative and an oxidizing agent to be subjected to an in-situ polymerization reaction in molten polyethylene glycol monomethyl ether, adding alkyl halide after the reaction is completed, performing a Delepine reaction, and obtaining the functional polycarboxylic acid water reducing agent. The functional polycarboxylate-type water reducing agent for resisting the flocculating agent in the machine-made sand prepared by the method disclosed by the invention can eliminate the influence of the flocculating agent in the machine-made sand on the dispersion performance of concrete, and ensures the working performance, the mechanical property and the durability of the concrete.

The invention relates to solvent-free type fiber reinforced epoxy paint and a preparation method of the solvent-free type fiber reinforced epoxy paint. The solvent-free type fiber reinforced epoxy paint comprises an ingredient A and an ingredient B, wherein the ingredient A mainly comprises the following ingredients in parts by weight: 20 to 50 parts of liquid epoxy resin, 5 to 20 parts of reactive diluents, 10 to 40 parts of titanium pigment, 10 to 40 parts of toughening agents, 10 to 30 parts of fillings and 4 to 10 parts of adhesion promoters, the ingredient B comprises the following ingredients in parts by weight: 20 to 60 parts of cashew modified amine, 20 to 60 parts of ketimine, 0.5 to 1.5 parts of adhesion promoters and 5 to 20 parts of active diluents, and the weight ratio of the ingredient A to the ingredient B is (4.5-5.5):1. The solvent-free type fiber reinforced epoxy paint is economic and environmental-friendly, the toughness is high, and wider industrial application prospects are realized.

The invention discloses preparation of substituted saturated hydrocarbon and particularly relates to a synthesizing method of 2-nitropropane. The 2-nitropropane is prepared by oxidizing isohydrazone. The synthesizing method includes the steps of S1, condensing acetone, water and ammonia in the presence of a catalyst to generate ketimine, wherein the mass ratio of the acetone to the water is 1:(1-5), and the use amount of the catalyst is 5-11% of the use amount of the acetone; S2, oxidizing the ketimine obtained in the step S1 to form the isohydrazone, wherein reaction system temperature is 30-60 DEG C and heat-preservation reaction time is 0.5-3 hours; S3, oxidizing the isohydrazone obtained in the step S2 to form the 2-nitropropane, wherein reaction system temperature is 50-80 DEG C and heat-preservation reaction time is 0.5-3 hours; rectifying obtained primary reaction liquid to obtain qualified 2-nitropropane products. The synthesizing method has the advantages that the acetone, the ammonia and the water are used as the initial raw materials, and the method is mild in catalytic oxidizing reaction condition, simple in process, convenient to operate, suitable for large-batch 2-nitropropane production, simple in post-processing and high in product purity and does not coproduce acetone oxime or acetone azine.

The invention provides modified epoxy resin, a preparation method and an application thereof, a cathodic electrophoretic coating and a preparation method and an application thereof, which belong to the technical field of the coating. The modified epoxy resin is mainly prepared from the following raw materials by weight: 20-32 parts of epoxy resin, 6-12 parts of bisphenol A, 2.5-5 parts of polyether polyol, 0.02-0.15 parts of a catalyst, 4-10 parts of ketimine-containing alcohol, 10-16 parts of carbamate-containing isocyanate, 8-15 parts of polyetheramine, and 22-40 parts of a solvent. The modified epoxy resin has flexible functional groups and more crosslinking sites, so that the modified epoxy resin of the invention and the cathodic electrophoretic coating using the modified epoxy resin can maintain excellent physical and chemical properties, and have excellent anti-stone chip performance, so that the cathodic electrophoretic coating can better meet the coating performance requirements of automobiles and related parts.

The invention belongs to the technical field of environment-friendly waterborne coatings, and particularly relates to modified epoxide resin and a preparing method thereof and a high-throwing-power cathode electrophoretic coating with the modified epoxide resin. The modified epoxide resin is prepared from epoxy resin, bisphenol, polyethylene glycol, N,N-dimethyl benzylamine, 4-methyl-2-pentanone,midbody ketimine A, midbody ketimine B, midbody ketimine C, an alcohol ether solvent, propylene glycol methyl ether acetate and polyether amine; corresponding emulsion and color paste are prepared through the modified epoxide resin, and then the emulsion and the color paste are mixed in proportion to prepare the cathode electrophoretic coating. Compared with an existing cathode electrophoretic coating, the throwing power of the cathode electrophoretic coating is remarkably improved, electrophoretic painting of the surface of a workpiece with the complex surface structure can be well met, the surface, the sunken portion, the gap portion and the shielded portion of the painted workpiece are coated with coating layers with the even thickness, the whole corrosion resistance and the like of theworkpiece are effectively improved accordingly, and the application range is wide.

The invention discloses application of a deprotonated phenyl bridged beta-ketimine lithium compound in the preparation of alcohol from ester. Ester and borane are used as raw materials, a hydroboration reaction is carried out; and after the hydroboration reaction is finished, silica gel and methanol are added, and a hydrolysis reaction is carried out to obtain alcohol. According to the applicationof the invention, the deprotonated phenyl bridged beta-ketimine lithium compound disclosed for the first time is used for catalyzing the hydroboration reaction of the ester and pinacol borane, so that a kind of efficient catalytic borohydride method is developed; the compound is simple in structure, easy to synthesize and capable of catalyzing the hydroboration reaction of the ester and borane with high activity. Compared with an existing catalytic system, the compound is easy to store, and particularly, exerts far smaller harm in use than an existing organic lithium reagent.

The invention provides a graphene based anti-bacterial and wear-resistant double-component coating. According to the specific scheme, the coating contains a component A and a component B, wherein thecomponent A is prepared through steps as follows: an acrylic polymer aqueous dispersion is taken as a substrate, and graphene supported titanium dioxide serving as an anti-bacterial agent, 2-acryloyloxyethyl tributylphosphonium chloride-trimethoxy vinyl silicon oligomer containing fluoroalkyl as well as other auxiliaries are added; the component B is ketimine; graphene supported titanium dioxide is prepared from 1-10 mu m graphene oxide, 10-15 nm titanium dioxide particles and a silane coupling agent through uniform dispersion in water, reduction and drying. Acrylic polymers are subjected to monomer selection, glass beads are introduced, so that wear resistance is improved, a final product has excellent anti-bacterial performance, wear resistance, stain resistance and adhesive force, and the coating with the excellent anti-bacterial performance and wear resistance is suitable for being used in hospitals and schools with large volume of people.