173 results about "Diimine" patented technology

The invention belongs to the technical field of organic porous materials, and relates to an acenaphthequinone diimine palladium functionalized super-crosslinked microporous polymer as well as a preparation method and application thereof. The preparation method specifically comprises the following steps: carrying out Friedel-Crafts alkylation reaction on (1E, 2E)-N1, N2-bis [2, 4, 6-tri-(benzhydryl phenyl)] acenaphthylene-1, 2-diimine and dimethyl formal, 1, 3, 5-triphenylbenzene or tetraphenylmethane, so as to obtain an organic porous polymer; and carrying out coordination on the organic porous polymer and PdCl2 to obtain the acenaphthequinone diimine palladium functionalized super-crosslinked microporous polymer with catalytic activity. The super-crosslinked microporous polymer has the advantages of high stability, large specific surface area and high palladium loading capacity, and can catalyze the direct C-H bond arylation reaction of brominated aromatic hydrocarbon and heteroaromatic hydrocarbon to synthesize a linked heteroaryl compound; the preparation method of the organic porous polymer catalytic material is simple and suitable for industrial production.

The invention provides a polyglutamic acid granular fertilizer and a preparation method thereof, and the preparation method comprises the following steps: S1, dissolving lignin in an alkaline solution, and heating until the lignin is dissolved; adding epsilon-polylysine fermentation liquor, mixing, heating, adding a formaldehyde solution, and carrying out grafting reaction to obtain epsilon-polylysine grafted lignin; s2, mixing the epsilon-polylysine grafted lignin solution and the gamma-polyglutamic acid solution, adding N-hydroxysuccinimide, standing at a low temperature, adding 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride, and mixing; carrying out gradient temperature reaction to obtain lignin grafted epsilon-polylysine / gamma-polyglutamic acid hydrogel; and S3, homogenizing the lignin-grafted epsilon-polylysine / gamma-polyglutamic acid hydrogel, carrying out normal-temperature high-pressure airflow crushing, and spraying the crushed hydrogel to the surfaces of particles obtained by granulating a basic material through high-pressure electrostatic spraying, so as to obtain the polyglutamic acid granular fertilizer. The obtained polyglutamic acid granular fertilizer has relatively strong water-retaining and slow-release (releasing water, urea and the like) effects.

The invention provides a 1, 4-diaza-butanetriene compound as well as a synthesis method and application thereof, and belongs to the technical field of organic synthesis. The preparation method comprises the following steps: carrying out a first reaction on a compound 1 and a compound 2 in a solvent A, removing the solvent A after the reaction is finished, extracting with benzene or toluene, filtering, mixing with 12-crown ether-4, and stirring to obtain a compound 3; the synthesis method of the compound 3 provided by the invention is high in yield, simple to operate, mild in reaction, simple in required reaction condition control and high in speed. The obtained compound 3 has excellent stability and can be used for key intermediates in various organic reactions, such as preparation of alpha-diimine ligands.

The invention discloses an immobilized enzyme with a Pickering emulsion stabilizing effect and a preparation method and application thereof. The preparation method comprises the following steps: adding shellac into an alkaline solution, stirring until the shellac is dissolved, preparing an aqueous solution, adjusting the pH value of the solution to 6-8, fully stirring to uniformly disperse shellac particles, and drying to obtain shellac nano-particle powder; the preparation method comprises the following steps: dispersing shellac nano-particle powder in water or a buffer solution, adding EDC (1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride) and NHS (N-hydroxysuccinimide), then adding lipase, and carrying out a coupling reaction to obtain the shellac nano-particle immobilized enzyme. The natural nanoparticle immobilized enzyme prepared by the invention not only can stabilize Pickering emulsion, and the emulsion can realize reversible emulsification-demulsification circulation under the stimulation of acid-base or gas, but also can be used for constructing a phytosterol ester efficient synthesis reaction system.

The invention belongs to the technical field of degradable and recyclable epoxy resin, and discloses degradable epoxy resin based on diimine bond vanillin as well as a preparation method and application of the degradable epoxy resin. The epoxy resin chain extender containing the biimine bond bio-based is prepared through a Schiff base reaction, the epoxy resin chain extender and epoxy resin are subjected to ring opening, finally, the epoxy resin chain extender and the curing agent containing amido are subjected to high-temperature curing, and the degradable and recyclable thermosetting epoxy resin and the degradable carbon fiber composite material which have excellent mechanical properties are prepared. The problem of recycling the thermosetting epoxy resin and the composite material is solved, sustainable utilization of resources is realized, and environmental pollution is reduced.

This invention relates to a method for testing the resistance to phenolic yellowing of carbodiimide anti-hydrolysis agent powder and its application. The testing method includes: (1) grinding the sample to be tested and spreading it evenly in a petri dish; (2) placing 2,6-di-tert-butyl-p-cresol in a petri dish of the same size as in step (1); (3) placing the test reagent in a container; (4) placing the petri dish from step (1), the petri dish from step (2), and the container from step (3) into a sealed container for aging; (5) immediately using a colorimeter to detect the yellowing index of the sample after aging in step (4). The method of this invention can accurately detect powdered or crystalline carbodiimide anti-hydrolysis agents, solving the problem that it is currently impossible to accurately detect the phenolic yellowing resistance of powdered samples.

The invention provides an alpha-diimine ligand compound, an alpha-diimine nickel catalyst and a preparation method and application of the alpha-diimine ligand compound and the alpha-diimine nickel catalyst, and belongs to the technical field of organic synthesis. Wherein R1 is selected from hydrogen, methoxyl or tertiary butyl; r2 is selected from methyl, ethyl or isopropyl; and R3 is selected from hydrogen or methyl. The alpha-diimine nickel catalyst prepared by adopting the alpha-diimine ligand compound can catalyze olefin to carry out homopolymerization reaction or copolymerization reaction, so that not only is excellent catalytic performance shown, but also a polyolefin material obtained by catalyzing olefin monomer homopolymerization reaction has excellent elastic recovery performance; and the catalyst has certain application potential in olefin polymerization industry.

The application discloses an anticoagulant biomaterial for blood purification and a preparation method and application thereof, and comprises the following steps: providing an amphiphilic copolymer P(AA-MMA); blending polyethersulfone, P(AA-MMA) and a solvent, stirring at a set temperature to obtain a casting solution, and preparing a blending membrane from the casting solution; soaking the blending membrane in a 2-morpholine-4-yl ethanesulfonic acid buffer solution containing argatroban, 1-ethyl-(3-dimethylaminopropyl) carbonyl diimide and hydroxy succinimide, and reacting at room temperature to obtain an argatroban grafted blending membrane, namely the anticoagulant biomaterial. The method improves the hydrophilicity of the membrane, reduces the albumin adsorption of the membrane, reduces the adhesion of platelets on the membrane, prolongs the coagulation time APTT, PT and TT of the membrane, and is better in biocompatibility and enhanced in anticoagulation performance.

Provided is a plug that can maintain a plugged state for a prescribed period even in a fluid or water having a high temperature and a low salt concentration. A plug (5) for temporarily blocking the flow of a fluid in a well, the plug being provided with a resin molded body formed of a polyglycolic acid resin composition containing polyglycolic acid and a cyclic carbodiimide compound, the concentration of carbodiimide groups being 15 eq / t or more, or the plug being composed of the resin molded body.

Provided are a resin composition capable of producing a molded article having enhanced durability, and a molded article including the resin composition.SOLUTION: The resin composition contains a semi-aromatic polyamide having a structural unit represented by formula (1), carbon fibers, and a water-soluble carbodiimide. In Formula (1), Ar1 represents a phenylene or naphthylene group, and a plurality of Ar1 contained in the semi-aromatic polyamide may be the same as or different from each other. P is an integer of 4 to 12. [Chemical Formula 1] SELECTED DRAWING: None

The invention provides a bidentate aza-matched nickel complex, a preparation method and a nickel metal catalyst for catalyzing olefin polymerization, the bidentate aza-matched nickel complex has a structure as shown in a formula (I), in the formula (I), R1 and R2 are the same or different, and are independently selected from substituted or unsubstituted C1-C10 alkyl, C1-C10 alkoxy, C2-C10 alkenyl or C6-C10 aryl, and R2 and R3 are the same or different and are independently selected from substituted or unsubstituted C1-C10 alkyl, C1-C10 alkoxy, C2-C10 alkenyl or C6-C10 aryl; r3 is selected from hydrogen, methyl, methoxyl and trifluoromethyl; x is selected from chlorine or bromine. According to the bidentate aza-nickel complex provided by the invention, the binding force between amido and nickel metal is stronger, and meanwhile, the imine is substituted by aryl, so that the nickel metal catalyst has a higher heat stabilizer, and is obviously superior to the traditional alpha-diimine nickel catalyst.

The application provides an alpha-diamino nickel complex for catalytically preparing polyethylene, realizes control of polymer molecular weight and branching degree by regulating N-aryl ortho groups in the alpha-diamino nickel complex molecules and polymerization conditions, and has the advantages of high catalytic activity, low cost, stable performance and the like. The prepared polyethylene has high molecular weight, narrow molecular weight distribution, high branching degree and excellent mechanical mechanical performance.

The present application relates to a kind of diimine ligand with the general structure shown in formula L, the post-transition metal catalyst prepared by its coordination and its preparation method and application, wherein R1-R6 are independently selected from H, C1-C6 alkyl, C1-C6 alkoxy, C6-C 12 Aryl or halogen. The present application constructs diimine post-transition metal catalyst with different chemical environment of bimetallic active site and rigid parent ring skeleton structure, not only improves catalytic activity and thermal stability, but also can be used for preparing bimodal UHMWPE by ethylene polymerization.

The application discloses a kind of vinylidene acenaphthene double asymmetric alpha-diimine chemical intermediates and catalyst prepared from it, intermediate and the preparation method and application of catalyst. 2,4,6-tri-tert-butyl aniline is used as raw material, in the presence of catalyst, under the condition of 120 DEG C, the vinylidene acenaphthene double asymmetric alpha-diimine chemical intermediate with structure as shown in formula (I) is obtained.Compared with prior art, the application uses commercially available, low-cost and storage condition loose 2,4,6-tri-tert-butyl aniline instead of high-cost, storage harsh 2,4-di-tert-butyl aniline as reaction raw material, which effectively reduces the raw material procurement threshold and comprehensive production cost, and simplifies the storage condition.The raw material of the method is easy to obtain, low in cost, easy to operate, high in yield, and suitable for industrial scale-up production.

The application provides an alpha-carboxyl-beta-diimine nickel complex and a preparation method and application thereof and a preparation method of ethylene-methyl acrylate copolymer. The alpha-carboxyl-beta-diimine nickel complex has a structure shown in general formula (I): in the general formula (I), Ar is selected from 2,6-dialkylphenyl; X is chlorine or bromine; and L is acetonitrile or benzonitrile. The preparation method of the alpha-carboxyl-beta-diimine nickel complex is that acetylacetone is reacted with 2,6-dialkylaniline, then reacted with ammonium formate under the action of alkyl lithium, and then reacted with a halogenated nickel salt in an acetonitrile or benzonitrile solvent to obtain the alpha-carboxyl-beta-diimine nickel complex. The application further provides a preparation method of ethylene-methyl acrylate copolymer, which uses the alpha-carboxyl-beta-diimine nickel complex as a main catalyst. The application improves the copolymer molecular weight and the methyl acrylate insertion rate, and makes the prepared EMA similar to the branched structure of a commercial product prepared by a free radical process.

The application discloses a bacteriostatic and deodorizing zeolite cat litter and a preparation method thereof, and belongs to the technical field of zeolite cat litter preparation. The bacteriostatic and deodorizing zeolite cat litter is composed of the following components in parts by weight: 55-75 parts of modified zeolite, 3-6 parts of bacteriostatic gel, 2-5 parts of adhesive, and 1-3 parts of filler. The modified zeolite is prepared from sulfamic acid, N,N-dimethylformamide, lignocellulose and zeolite, and the bacteriostatic agent is prepared from four-arm polyethylene glycol, succinic anhydride, triethylamine, N-hydroxyl glutarimide, 1-(3-dimethylaminopropyl)-3-ethyl carbodiimide hydrochloride and polylysine. The zeolite cat litter prepared by the method has excellent water absorption, antibacterial property and deodorizing property.

This invention discloses an asymmetric (α-diimine) nickel-olefin catalyst based on ethylene acenaphthene as its framework, its preparation method, and its applications. The structural formula of the catalyst is shown in Formula (I), where X is chlorine or bromine. The catalyst has a simple preparation process and exhibits results contrary to conventional experimental observations when catalyzing ethylene polymerization: larger substituents lead to higher crystallinity in the polymerization product. Furthermore, this type of catalyst also exhibits good thermal stability and polymerization activity, showing promising prospects for industrial applications. Formula (I)

To provide a thermosetting coating composition capable of forming a cured coating film excellent in extensibility, toughness and shielding properties.SOLUTION: The thermosetting coating composition according to the present invention comprises a polycarbonate polyol (A) and / or a polyether polyol (B), a carbodiimide-modified diphenylmethane diisocyanate (C), at least one selected from the group consisting of a trimethylolpropane adduct isocyanate (D), a biuret isocyanate (E), and an allophanate isocyanate (F), and a color pigment (G).SELECTED DRAWING: Figure 1

The application provides a flexible ortho-aryloxy cycloalkyl substituted pyridine diimine iron and cobalt complex catalyst and a preparation method and application thereof, and belongs to the technical field of olefin polymerization catalysis; a series of 2,4,6-tricycloalkyl arylamine compounds are introduced into 2,6-diacetyl pyridine, and with the change of the space volume of the cycloalkyl, the molecular weight and distribution of polyethylene can be controlled; the substituents in the complex are selected from cycloalkyl, and under the protection of a gas atmosphere, the ligand is reacted with FeCl2.4H2O and CoCl2.6H2O respectively to obtain the complex catalyst of the present application; the complex exhibits extremely high polymerization activity, up to 1.76*10 7 g / mol.h, and generates high linear polyethylene with different molecular weight ranges; and has good industrial potential.

The invention relates to the technical field of coatings, in particular to a manufacturing method and a using method of an electrical coating capable of reducing flashover. The invention relates to a manufacturing method of an electrical coating capable of reducing flashover. The electrical coating is prepared from the following materials in parts by mass: organic silicon resin, n-butyl alcohol, cyclohexanone, dimethyl carbonate, an acrylic emulsion, a stabilizer, a silicone acrylic emulsion, diisopropyl carbodiimide, acrylic ester, glycerol, citric acid, a dispersing agent, a coupling agent, ceramic powder and nano rubber powder. The electrical coating capable of reducing flashover can be obtained by mixing and stirring the materials in a reaction kettle. The application method of the flashover-reducing electrical coating obtained by the method comprises the step of brushing the surface of a brushed object under the condition that the temperature is kept at 50-70 DEG C. The anti-flashover device has the advantages of better anti-flashover effect and more durable durability.

The invention provides a binuclear zinc complex based on a bridged bis (beta-diimine) dianion ligand as well as a preparation method and application of the binuclear zinc complex, and belongs to the technical field of preparation and application of metal organic complexes. Starting from p-phenylenediamine, an aryl bridged bis (beta-diimine) ligand precursor is synthesized through multi-step reactions such as amine methylation, nucleophilic substitution and condensation, the ligand precursor is utilized to react with ZnEt2 or Zn [N (SiMe3) 2] 2 to obtain the binuclear metal zinc complex, and the obtained complex has high catalytic activity on lactide ring-opening polymerization, and can be used for preparing the complex for lactide ring-opening polymerization. The ring opening polymerization of the lactide can be catalyzed to generate the polylactide with high molecular weight and narrow molecular weight distribution in the absence of a cocatalyst.

The invention relates to a nitric oxide donor based on heparin sodium and a preparation method and application thereof, the method comprises the following steps: (1) dissolving heparin sodium in a 2-(N-morpholino) ethanesulfonic acid buffer solution, adding an activator, and carrying out a reaction to obtain a reaction solution A; (2) adding beta-mercaptoethylamine into the reaction solution A, and continuously reacting to obtain a reaction solution B; (3) dialyzing the reaction solution B to obtain a solution C; and (4) adding tert-butyl nitrite into the solution C, and reacting to obtain the heparin sodium-based nitric oxide donor. Wherein in the step (1), the activating agent is 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide or hydrochloride of the 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide. According to the prepared heparin sodium-based nitric oxide donor, the nitric oxide release time is prolonged, and the problem that the half-life period of nitric oxide is short is solved.

A beta-diamide cerium complex, a preparation method and application thereof, the beta-diamide cerium complex has a structural formula as shown in formula (I), wherein the beta-diamide cerium complex is prepared by the following method: dissolving a beta-diamide ligand in a reaction solvent, adding a base to perform a deprotonation reaction, and further reacting with a cerium bromide dissolved in the solvent to obtain the beta-diamide cerium complex. The reactivity research is specifically focused on a ligand exchange reaction. The synthesis path is simple, has a good yield, and expands the range of beta-diamide stable rare earth metal complexes.

The present application relates to a kind of heparin sodium-based nitric oxide donor and its preparation method and application, the method includes the following steps: (1) heparin sodium is dissolved in 2-(N-morpholino) ethanesulfonic acid buffer solution, adding activating agent, reaction is carried out, and reaction liquid A is obtained;(2) to reaction liquid A, continue to react to obtain reaction liquid B by adding β-mercaptoethylamine;(3) reaction liquid B is dialyzed, and solution C is obtained;(4) to solution C, nitrous acid tert-butyl ester is added, and the heparin sodium-based nitric oxide donor is obtained by reaction;Wherein, in step (1), the activating agent is 1-ethyl-3-(3-dimethylaminopropyl) carbonyl diimide or its hydrochloride salt.The heparin sodium-based nitric oxide donor prepared in the present application prolongs the release time of nitric oxide, and solves the problem of short half-life of nitric oxide.

The invention belongs to the technical field of biochemistry, and relates to a ratio type probe compound, a preparation method thereof, a Cu (I) response photoacoustic probe composition and application. The preparation method of the ratiometric probe compound comprises the following steps: (1) reacting a compound (I), a compound (II), acetic acid and piperidine to obtain a compound (III); (2) reacting the compound (III) with trifluoroacetic acid to obtain a compound (IV); (3) carrying out a reaction on the compound (IV), the compound (V), 2-(7-azabenzotriazole)-N, N, N ', N'-tetramethylurea hexafluorophosphate and 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride, so as to obtain a compound (VI); and (4) reacting the compound (VI), the compound (VII), acetic acid and piperidine to obtain the compound. The photoacoustic probe provided by the invention has excellent selectivity and high sensitivity.

The application discloses a flexible mono-arylmethyl alpha-diimine palladium (II) catalyst and application thereof in catalytic polymerization of ethylene. The catalyst has 1,2-acenaphthene and 2,3-butanedione as a core skeleton, and successfully realizes high branching degree and wide molecular weight adjustment of polyethylene by skillfully introducing a flexible mono-arylmethyl structure. The catalyst has significant polymerization activity, which is between 1.6 and 15.1*10 4 g / (mol Pd·h). Compared with traditional rigid ortho-aryl and ortho-di-arylmethyl Pd(II) catalysts, the flexible catalyst can significantly improve the branching density, and provides a highly flexible means for adjusting the viscosity of PAO lubricating oil base oil. In the copolymerization reaction of ethylene and methacrylic acid, the flexible catalyst also exhibits excellent performance, which is superior to rigid counterparts in promoting MA insertion, and further verifies the broad application prospect of the flexible catalyst in synthesis of polar functionalized polyethylene.

The invention discloses synthesis and application of a pyridine-containing asymmetric alpha-diimine nickel catalyst and application of Lewis acid regulation in olefin polymerization, and belongs to the technical field of olefin polymerization. In the olefin polymerization reaction catalyzed by the diimine nickel catalyst, the Lewis acid plays a very ingenious role of a regulator, and the electronic property and space environment of the active center of the catalyst are changed by introducing the Lewis acid salt, so that the dual regulation of the steric hindrance and the electronic effect of the catalyst is realized; the performance of the catalyst is improved; and the structure of the final polymer is changed. Compared with known alpha-diimine nickel catalysts, the alpha-diimine nickel catalyst has the advantages of high polymerization activity, strong thermal stability and improvement of monomer insertion rate.

This invention discloses a phenyl-modified, biasymmetric (α-diimine) nickel olefin catalyst based on acenaphthoquinone as its framework, its preparation method, and its applications. The catalyst's structural formula is shown in Formula (I), where X is chlorine or bromine. The catalyst has a simple preparation process and, when used as a co-catalyst for ethylene polymerization, exhibits results contrary to conventional experimental observations: larger substituents lead to lower molecular weight, better flowability, and dispersibility in the polymerized product, showing broad application prospects in the elastomer field. Furthermore, this type of catalyst also exhibits good thermal stability and polymerization activity, demonstrating promising industrial application prospects. Formula (I).

The present application relates to the technical field of nickel-based catalyst, and discloses a diimine ligand, a preparation method and application thereof, wherein the raw materials for preparing the diimine ligand contain acenaphthenequinone, a protective agent, substituted aniline and a catalyst, the protective agent is selected from one or more than two of ortho ester, amine, hydrazine and substituted hydrazine; and the molar ratio of the acenaphthenequinone, the protective agent, the substituted aniline and the catalyst is 1:(0.5-3):(1.6-2.4):(0.1-10). In the present application, a certain amount of protective agent is added to the reaction system, the acenaphthenequinone is reacted with the ortho ester or low-molecular-weight amine to generate ketal or imine, the ketal or imine is separated or not separated, and then reacted with the substituted aniline to generate the target product diimine ligand, no water is generated in the synthesis reaction of the diimine ligand, the balance can be effectively promoted to the forward reaction, and the reaction yield is improved.

Provided are a resin composition excellent in heat shock resistance, and a molded article using the same.　Provided is a resin composition containing (A) a polybutylene terephthalate resin, (B) a carbodiimide compound, (C) an elastomer, and (D) a fibrous inorganic filler, wherein the carbodiimide compound (B) contains (b1) a cyclic carbodiimide compound and (b2) an aromatic carbodiimide compound, the total content of the cyclic carbodiimide compound (b1) and the aromatic carbodiimide compound (b2) is 0.6 to 2.0 parts by mass relative to 100 parts by mass of the polybutylene terephthalate resin (A), and the mass ratio [(b1) / (b2)] of the cyclic carbodiimide compound (b1) to the aromatic carbodiimide compound (b2) is 0.2 to 1.6.