150 results about "Aziridine" patented technology

The invention relates to the technical field of plastic material preparation, and discloses a modified bamboo fiber, a PBAT composite material and a plastic object. The modified bamboo fiber comprises bamboo fiber subjected to hot pressing treatment in water and a closed aziridine cross-linking agent loaded on the bamboo fiber, and the mass ratio of the bamboo fiber subjected to hot pressing treatment in water to the closed aziridine cross-linking agent is 100: (1-10). The PBAT composite material comprises the following components in parts by weight: PBAT and modified bamboo fibers, and the mass ratio of the PBAT to the modified bamboo fibers is 100: (20-40). The modified bamboo fiber is subjected to hot pressing treatment in water, so that the generation of volatile gas caused by high-temperature processing can be avoided when the modified bamboo fiber is applied to the plastic material, and the interface interaction with the plastic material can be improved; the closed aziridine cross-linking agent can release active groups at high temperature, and can react with active functional groups such as hydroxyl and carboxyl on the surfaces of the bamboo fibers and the surfaces of the plastic materials, so that the interface interaction between the bamboo fibers and the plastic matrix is improved, and the tensile strength of the composite material is improved.

The invention discloses a high-humidity-resistant high-barrier coating film and a preparation method thereof, and belongs to the technical field of polymer composite materials. The coating film comprises a base film and a coating layer, wherein the coating layer is prepared from a coating liquid containing an ethylene-vinyl alcohol copolymer, acetoacetyl modified polyvinyl alcohol, amino silane modified boron nitride nanosheets, hydroxyl modified potassium titanate whiskers, a water-based polyfunctional aziridine cross-linking agent and an epoxy silane coupling agent. A multi-phase synergistic system of a polymer matrix-nano material-cross-linked network is constructed, a three-dimensional barrier network is constructed by utilizing the synergistic effect of two-dimensional nanosheets and one-dimensional whiskers, and meanwhile, the number of hydrophilic groups is reduced through a specific cross-linking reaction, so that the barrier stability of the material in a high-humidity environment is remarkably improved. The film has excellent oxygen and water vapor barrier property, good mechanical strength, thermal stability and aging resistance, and can be widely applied to the field of high-end packaging of food, medicines and precise instruments.

The invention relates to the technical field of western-style clothes processing, in particular to an anti-wrinkle western-style clothes fabric and a processing technology thereof.The anti-wrinkle western-style clothes fabric is prepared by finishing base cloth through finishing liquid, the base cloth is wool blended fabric, and the wool blended fabric comprises wool, polyester fibers, lyocell fibers, spandex and conductive fibers; the finishing liquid is prepared from the following raw materials in parts by weight: 1 to 4 parts of polyoxyethylene sorbitan monooleate, 0.1 to 1 part of cocamidopropyl betaine, 2 to 6 parts of a fiber protecting agent, 80 to 120 parts of carboxyl-terminated hyperbranched polyester, 40 to 60 parts of butanetetracarboxylic acid, 30 to 50 parts of poloxamer, 0.1 to 2 parts of a silane coupling agent, 2 to 4 parts of an aziridine cross-linking agent and 900 to 1100 parts of water; the fabric has the advantage that the crease resistance of the business suit fabric is improved.

The invention relates to aziridinyl-functional organic compounds comprising a group Z of Formula (I1), wherein n is an integer ranging from and including 1 up to and including (100), and R' is selected from the group consisting of hydrogen, methyl and C2-C4 saturated aliphatic hydrocarbyl. The invention further relates to particles, composition, cured forms of the aziridinyl-functional organic component, the particles and the composition. The invention further relates to an article.

The invention relates to the technical field of water purification, in particular to an integrated iron and manganese removal water treatment process which comprises the following steps: raw water aeration and coagulation treatment, iron removal, ammonia nitrogen removal and manganese removal, and the raw water aeration and coagulation treatment step is as follows: raw water is subjected to aeration treatment after being pre-oxidized by ozone; the raw water subjected to aeration treatment is input into a reaction tank, a coagulant is added into the reaction tank, the dosage of the coagulant is 8-20 mg / L, the contact time of the raw water subjected to aeration treatment and the coagulant is 20-300 s, and primary treatment water is prepared; the coagulant is prepared from the following raw materials in parts by weight: 8 to 12 parts of polyacrylamide, 2 to 4 parts of organic soluble sol and 0.4 to 0.8 part of trimethylolpropane tri [beta-(aziridinyl) propionate]. The device has the advantage of improving the precipitation rate of insoluble impurities in underground water.

The present application relates to the technical field of BOPP film, in particular to a scratch-resistant glue-free matt film and a preparation method thereof, the scratch-resistant glue-free matt film comprises a matt layer, a core layer and a thermal composite layer arranged in sequence, the matt layer comprises copolymerized polypropylene, high-density polyethylene, 2.0-2.5 wt% maleic anhydride modified aziridine as an end group of linear alkyl silicone (weight average molecular weight 120-150 thousand, surface tension 42-45 mN / m) and 2000-4000 ppm spherical polymethyl methacrylate (particle size D50 is 4.0-5.0 microns); the core layer comprises homopolymerized polypropylene; and the thermal composite layer comprises ethylene-vinyl acetate copolymer and 2000-4000 ppm spherical anti-blocking agent. Through the synergistic design of the components of the matt layer and the thermal composite layer, the scratch-resistant glue-free matt film realizes the balance of the surface scratch resistance of the matt layer, the high surface tension (printability) and the smoothness of the winding and unwinding, and provides a solution to the common problem of the scratch resistance of the matt surface for high-end BOPP matt film.

The invention provides photosensitive resin, an anti-dazzle film, a preparation method of the anti-dazzle film and a degradation method of the anti-dazzle film, and relates to photosensitive resin in the field of display and optical film materials. The photosensitive resin is prepared by reaction of raw materials including a urethane acrylate oligomer, an aziridine compound and an acrylic monomer, and the molecular structure of the photosensitive resin has a beta-amino ester bond and an ultraviolet-curable acrylate group. The degradable photosensitive resin is provided by introducing beta-amino ester bonds into the photosensitive resin, so that the anti-dazzle film prepared from the coating composition containing the photosensitive resin can be quickly hydrolyzed and degraded under a mild hydrothermal condition, the problem of pollution of a polymer coating in electronic waste is fundamentally solved, and the anti-dazzle film has the advantages of high anti-dazzle performance and the like. And the environmental problem caused by the method can be effectively relieved.

The invention discloses a universal polymer force-sensitive cross-linking agent based on combination of a force-sensitive group and a bis-aziridine cross-linking function, and a preparation method and application thereof. The cross-linking agent is prepared by esterification of the force-sensitive group and a bis-aziridine group. The method comprises the following steps: in a nitrogen environment, carrying out a reaction on a force sensitive group, 4-[3-(trifluoromethyl) diazo-3-yl] benzoic acid, 4-dimethylaminopyridine (DMAP) and 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide hydrochloride (EDC-HCl) in anhydrous dichloromethane; and extracting the obtained mixture for three times, performing column chromatography purification on the obtained mixture on a silica gel column by using an eluent, and spin-drying to obtain a final product. The mechanical response sensitivity and structural stability of the material are remarkably improved, a mechanical force sensitive group introduction strategy suitable for various polymer systems is established, and a new technical path and theoretical support are provided for multifunctional design and wide application of the stress sensitive material.

The invention discloses a gram-level synthesis method of Dactyllactone A. The gram-level synthesis method of Dactyllactone A is shown in the description. The method comprises the following steps: with simple and easily available aryl iodide, aziridine and triisopropyl silylacetylene as starting materials, stirring and reacting in an organic solvent at 60-70 DEG C under the action of a palladium catalyst, a phosphine ligand, a norbornene derivative and alkali to obtain a key intermediate; the key intermediate is condensed with iodo gem-dimethyl ester furanone prepared from propiolic acid and dimethyl malonate iodine ylide, and then the condensation product is subjected to an Au / Ag catalyzed intramolecular hydroamination reaction, photocatalytic 6-pi electro-cyclization and two-step conversion, so that the natural product Dactyllactone A can be obtained, wherein the iodo gem-dimethyl ester furanone and iodo gem-dimethyl ester furanone are prepared from propiolic acid and dimethyl malonate iodine ylide. The method has the advantages of cheap and easily available raw materials, short reaction steps, high reaction efficiency, large preparation scale, simple preparation process and the like, has great application potential, and lays a good foundation for industrial production.

Examples of the present disclosure include a separator for a rechargeable lithium battery, and a rechargeable lithium battery including the separator. The separator for a rechargeable lithium battery includes a porous substrate, and a coating layer on at least one surface of the porous substrate. The coating layer includes a cross-linked product of a binder, a cross-linking agent, and carboxyalkyl cellulose or a salt thereof, and a filler. The binder includes a (meth)acryl-based binder including a first structural unit derived from (meth)acrylamide and a second structural unit derived from (meth)acrylamido sulfonic acid or a salt thereof. The cross-linking agent includes one or more of an aziridine-based cross-linking agent and a carbodiimide-based cross-linking agent.

The invention relates to the use of aqueous dispersions for producing storage-stable and latent-reactive adhesives, said aqueous dispersions containing at least the following dispersion components: (A) at least one carboxyl group-containing semi-crystalline or crystalline polyurethane polymer having a melting temperature of 35 to 80 DEG C, an enthalpy of fusion of > = 15 J / g and a meta-acid value of 0.8 to 25 mg KOH / g; (B) at least one polycarbodiimide, at least one polyaziridine and / or mixtures thereof, wherein the at least one polycarbodiimide and the at least one polyaziridine have a glass transition temperature in the range of-150 DEG C to 30 DEG C; (C) optionally, at least one additional polymer different from the at least one polymer (A); and (D) optionally, at least one additive different from components (A), (B) and (C). Furthermore, a method and an adhesive bond for bonding at least two substrates or at least two surface regions of a substrate are provided.

The present invention relates to compounds of formula (I) or formula (II) or pharmaceutically acceptable salt, solvate or hydrate thereof, wherein said compound of formula (I) and said compound of formula II each comprises at least one ONO2 or ONO moiety; R1 is C1-C3alkyl; R2 is H, C1-C6alkyl, C3-C6cycloalkyl, C1-C2alkoxy, C2-C4alkenyl; R3 is C1-C4alkyl optionally substituted with C1-C2alkoxy, C3-C4cycloalkyl, C2-C4alkenyl; R4 and R5 are each independently H or C1-C6alkyl optionally substituted with F, OH, ONO, ONO2, COOH, C1-C3alkoxy, C3-C6cycloalkyl; or together with the nitrogen atom to which they are attached form a heterocyclic ring, wherein preferably said heterocyclic ring is selected from aziridine, azetidine, pyrollidine, piperidine, morpholine, piperazine, homo-piperazine, 2,5-diazabicyclo[2,2,1]heptane and 3,7-diazabicyclo[3,3,0]octane, wherein said heterocyclic ring is optionally substituted with independently one or more R6; R6 is C1-C6alkyl optionally substituted with independently one or more halogen, OH, ONO, ONO2, C1-C3alkoxy, C1-C3haloalkoxy, COOR7, NR8R9, C═NR10; R7 is H, or C1-C4alkyl optionally substituted with F, OH, ONO, ONO2, NR8R9; R8 and R9 are independently H, or C1-C4alkyl optionally substituted with ONO, ONO2; R10 is C1-C4alkyl optionally substituted with F, ONO, ONO2; C3-C6cycloalkyl; pharmaceutical compositions thereof, and their use in methods of treating or preventing a disease alleviated by inhibition of PDE5 in a human or in a non-human mammal.

The invention relates to the technical field of functional coatings, in particular to a PTK-CNT stable waterborne polyurethane gloss oil dispersion and a preparation method thereof.The PTK-CNT stable waterborne polyurethane gloss oil dispersion comprises waterborne polyurethane gloss oil containing unreacted-NCO groups and / or-COOH groups; an aziridine ring of the aziridine cross-linking agent and a-COOH group of the waterborne polyurethane are subjected to a ring-opening reaction to form a beta-hydroxyamido bond covalent cross-linked network; cNT is modified by PFAS, the surface of CNT is covalently grafted with a perfluoroalkyl chain through an ether bond and is bridged to waterborne polyurethane gloss oil through a KH550 silane coupling agent, amino of KH550 and-NCO groups of polyurethane form urea bonds, and hydrolyzed silicon hydroxyl and hydroxyl on the surface of CNT are condensed to form Si-O-C bonds; the FS-61 is used for stably dispersing the PFAS modified CNT and forms an electrostatic steric hindrance layer in the dispersion; and curing and drying the dispersion at 80-120 DEG C to form the super-amphiphobic coating. The invention provides a simple and environment-friendly water-based normal-temperature preparation method, the water-based polyurethane coating with excellent mechanical property and antifouling property is produced, and the water-based polyurethane coating has a wide application prospect.

The application provides a wear-resistant and sweat-resistant acrylic paint, a preparation method and application thereof, and belongs to the technical field of paints.The wear-resistant and sweat-resistant acrylic paint disclosed by the application is composed of the following raw materials in parts by weight: 30-50 parts of water-based acrylic resin, 15-20 parts of cashew phenol-based polyurethane resin, 0.8-1.5 parts of adhesion promoter, 3-5 parts of titanate coupling agent, 3-15 parts of filler, 0.5-1.8 parts of thickening agent, 0.5-2.0 parts of leveling agent, 0.5-1.0 parts of wetting agent, 0.5-1.5 parts of defoaming agent, 0.5-2 parts of cosolvent and 5-15 parts of water; wherein the components of the water-based acrylic resin include acrylic monomer, dithio glycolic acid, tri-n-butyl borane and aziridine crosslinking agent; and a preparation method of the acrylic paint is also provided.The acrylic paint provided by the application has excellent mechanical properties, good adhesion, excellent water resistance, scratch resistance, wear resistance, chemical resistance, sweat resistance and corrosion resistance and the like, and can be applied to 3C products and the glasses industry, thereby prolonging the service life of the products.

This invention relates to the field of synthetic biology, specifically to an oxygen methyltransferase and its application in the biosynthesis of isozyridine and aziridine. This application identifies the core gene elements of the isozyridine biosynthetic pathway—the oxygen methyltransferase genes SgOMT3 and Ese08G000662.t1—which encode proteins capable of catalyzing the conversion of fraxinus to isozyridine. Based on the oxygen methyltransferase of this application, combined with the isozyridine metabolic pathway, isozyridine can be synthesized in bacteria, yeast, algae, and plant substrates. This application provides an artificial synthetic pathway for isozyridine, offering a theoretical basis for the efficient, green, and low-carbon production of isozyridine through biosynthesis.

The invention provides a temperature and humidity alternating resistant water-based paint and a preparation method thereof. The temperature and humidity alternating resistant water-based paint is composed of a component A and a component B, the component A comprises an elastic emulsion, an anti-freezing agent, a coalescing agent, a wetting dispersant, a defoaming agent, a thickening agent, a multifunctional additive, water and at least one of glass fibers, high silica fibers and sepiolite fibers; the component B comprises a cross-linking agent; the cross-linking agent is an isocyanate curing agent, an oxazoline cross-linking agent or an aziridine cross-linking agent. According to the temperature and humidity alternating resistant water-based paint provided by the invention, components with specific contents are adopted, so that relatively good overall interaction is realized, and a coating can have good stability in a complex temperature and humidity change environment; and the component A can also comprise a fireproof filler and a flame retardant, can expand and foam when meeting flames to form a foam expansion layer, has high strength and compactness, can prevent flame heat transmission and prolong the fire endurance of the base material, and has good fire resistance.

This invention discloses an acid and alkali resistant polyamide membrane and its preparation method. The method is as follows: S1: Immerse the ultrafiltration base membrane in an aqueous sodium hydroxide solution for soaking and then set aside; S2: Treat the base membrane with a mixed aqueous solution of polyamine and aziridine crosslinking agent; S3: Wet the base membrane in an organic phase solution of polyacrylamide monomer to obtain a polyamide composite membrane; S4: Immerse the prepared polyamide composite membrane in an alcoholic solution of hydroxymethyl crosslinking agent, then dry it in a forced-air drying oven, and after washing with water, obtain the acid and alkali resistant polyamide membrane. This application uses two crosslinking agents, aziridine and hydroxymethyl, which can undergo specific crosslinking reactions with the carboxyl groups inside the polyamide membrane, to directly perform dual crosslinking modification on the membrane interior and surface, without introducing other polymer materials to avoid excessive increase in membrane permeation resistance. The polyamide membrane prepared by this method has both good acid and alkali resistance and water permeability.

The present invention relates to a multiaziridine crosslinking composition, characterized in that the composition is an aqueous dispersion having a pH ranging from 9 to 14 and comprising a multiaziridine compound in dispersed form, wherein such multiaziridine compound has: a. from 2 to 6 of the following structural units A: (see Formula) (A) wherein R1, R2, R3 and R4 are H m is 1, R' and R'' are in accordance with (1) or (2): (1) R' = H or an aliphatic hydrocarbon group containing from 1 to 14 carbon atoms, and R'' = an alkyl group containing from 1 to 4 carbon atoms, CH2-O-(C=O)-R''' or CH2-O-R'''', wherein R''' is an alkyl group containing from 4 to 12 carbon atoms and R'''' is an alkyl group containing from 1 to 14 carbon atoms, (2) R' and R'' together form a saturated cycloaliphatic hydrocarbon group containing from 5 to 8 carbon atoms; b.one or more linking chains where each of these linking chains links two of the structural units A; and c. a molecular weight in the range of 600 to 10000 Daltons.

Multifunctional crosslinkers are a reaction product between a polyaziridine compound and two or more functionalized benzophenones. The polyaziridine compound is linked to the functionalized benzophenones through two or more reacted aziridine groups. Coating compositions, comprising: a polymer, and multifunctional crosslinkers. Coated medical devices, comprise a lubricious coating bonded adjacent to an exterior surface of the medical device. The lubricious coating is prepared by UV-curing a coating composition, wherein the coating composition comprises: a water / isopropyl alcohol (IPA) soluble polymer and / or a UV-curable polymer, and a water / IPA soluble multifunctional crosslinker.

Examples of the present disclosure include a separator for a rechargeable lithium battery and a rechargeable lithium battery including the same. A separator for a rechargeable lithium battery includes a porous substrate and a coating layer on at least one surface of the porous substrate. The coating includes a crosslinking product of a binder, a crosslinking agent and a carboxyalkyl cellulose or a salt thereof, and a filler. The binder includes a (meth) acryloyl-based binder including a first structural unit derived from (meth) acrylamide and a second structural unit derived from (meth) acrylamidosulfonic acid or a salt thereof. The cross-linking agent comprises one or more of an aziridine cross-linking agent and a carbodiimide cross-linking agent.

The invention discloses a surface-treatment-free water-based acrylate adhesive for a PVC (polyvinyl chloride) floor and a preparation method of the surface-treatment-free water-based acrylate adhesive, and belongs to the technical field of polymer adhesives. The adhesive comprises the following raw material components: 0.5-15% of ester-soluble chlorinated polypropylene and 26-32% of chlorine; 0.5-15% of acrylic acid; 1-5% of ethyl acrylate; 65 to 95% of butyl acrylate; 0.5 to 3 percent of nano ZnO emulsion; 0.5 to 2% of an aziridine cross-linking agent; 1-5% of a nonionic surfactant; 0.1-1% of a water-soluble initiator; wherein the ester-soluble chlorinated polypropylene is introduced by being dissolved in a mixed monomer of ethyl acrylate and butyl acrylate in advance. The obtained adhesive is good in stability and high in initial adhesion, surface treatment-free adhesion is realized, and the initial adhesion and cohesion are balanced; meanwhile, the coating has excellent heat resistance and creep resistance, is a full-water-based system, is extremely low in VOC content, is green and environment-friendly, and has important industrial application value.

The invention relates to a novel chemical cross-linking agent with mass spectrum fragmentable trehalose disaccharide as a skeleton structure and a preparation method thereof. The cross-linking agent disclosed by the invention has the following characteristics: 1) trehalose disaccharide is used as a skeleton structure, so that the cross-linking agent has excellent biocompatibility; 2) the trehalose skeleton has a pair of symmetrical mass spectrum fragmentable glucosidic bonds, so that a cross-linked peptide fragment can be simplified into a conventional peptide fragment modified by a cross-linking agent fragment; 3) the enrichment of the cross-linked peptide fragment can be realized by the trehalose skeleton under the condition of not adding an enrichment handle; and 4) active groups of the cross-linking agent comprise but not limited to a plurality of reactive groups such as succinamide ester, diaziridine, phenylsulfonyl fluoride, hydrazide group, amino group, hydroxylamine group and the like, and chemical cross-linking of a plurality of amino acids except lysine is realized. The trehalose cross-linking agent disclosed by the invention is applied to the field of proteomics, and provides technical support for realizing large-scale analysis of a protein complex in a complex sample, spatial structure analysis of protein and a protein-protein interaction network.

The invention discloses C2-quaternary carbon amino sugar as well as a preparation method and application thereof. According to the preparation method, C2-position functionalized glyene is taken as a raw material, di-tert-butyldiaziridone is taken as a nitrogen source, and a double amination reaction of unsaturated bonds of sugar rings is realized by utilizing a copper-catalyzed nitrogen-nitrogen bond activation strategy, so that the C2-quaternary carbon amino sugar compound is constructed. In-vitro antifungal activity research results show that the C2-quaternary carbon amino sugar has certain inhibitory activity on tested fungi, and the compounds I-2 and I-3 show good broad-spectrum antibacterial biological activity and can be used as an agricultural bactericide. The C2-quaternary carbon amino sugar developed by the invention has the remarkable characteristics of simple and efficient synthesis method, cheap and easily available raw materials, mild reaction conditions and the like, and has a good application prospect.

The invention relates to the technical field of pressure-sensitive adhesives, and provides a high-temperature-resistant and solvent-resistant acrylate pressure-sensitive adhesive as well as a preparation method and application thereof. The acrylate pressure-sensitive adhesive provided by the invention comprises a component A and a component B, wherein the component A comprises the following preparation raw materials in percentage by mass: 30-40% of a monomer, 0.3-0.6% of a thermal initiator and the balance of an organic solvent; the component B comprises an isocyanate curing agent and an aziridine cross-linking agent. The acrylate pressure-sensitive adhesive provided by the invention has medium peel strength and good holding power, a protective film prepared from the acrylate pressure-sensitive adhesive can prevent a workpiece from being polluted and damaged in a coating process, the protective film can be easily peeled off after the process is completed, an adhesive layer is not easy to transfer, later pollution is not caused, and the product yield and efficiency of the workpiece can be effectively improved; meanwhile, the acrylate pressure-sensitive adhesive provided by the invention has good high temperature resistance and solvent resistance, can be repeatedly used, and can greatly reduce the production and manufacturing cost.

The invention relates to the technical field of textiles, in particular to a soft waterproof nanofiber membrane and a preparation method thereof. The preparation method of the soft waterproof nanofiber membrane comprises the following steps: (1) adding polyethylene glycol, trimethylolpropane tri (2-methyl-1-aziridine propionate) and modified composite particles into a modified polyurethane emulsion, adding water, and stirring to obtain a spinning solution; and (2) filling the spinning solution into an injector, carrying out electrostatic spinning by taking an aluminum foil as a base material, and then carrying out heat treatment to obtain the soft waterproof nanofiber membrane. The soft waterproof nanofiber membrane prepared by adding the modified composite particles and using the modified polyurethane emulsion has good hydrophobicity, air permeability and mechanical properties, and has a wide application prospect.

Examples of the present disclosure include a separator for a rechargeable lithium battery, and a rechargeable lithium battery including the separator, and the separator for a rechargeable lithium battery includes a porous substrate and a coating layer located on at least one surface of the porous substrate. The coating layer includes a cross-linked product of a binder and a cross-linking agent, a filler, and an adhesive binder. The binder includes a (meth)acryl-based binder including one or more of a first structural unit derived from (meth)acrylamide, a second structural unit derived from (meth)acrylic acid or (meth)acrylate, and a third structural unit derived from (meth)acrylamido sulfonic acid or a salt thereof, the cross-linking agent includes an aziridine-based cross-linking agent. The filler includes a filler having a particle diameter D100 of about 0.5 μm or less, and the adhesive binder includes a cross-linked (meth)acryl-based polymer or copolymer.

The invention relates to the field of asymmetric catalytic hydrogenation, in particular to an asymmetric hydrogenation kinetic resolution method of racemic polysubstituted three-membered ring imine, which is characterized by comprising the following steps: in the presence of a chiral diamine metal catalyst, carrying out asymmetric hydrogenation kinetic resolution on racemic polysubstituted three-membered ring imine; the method comprises the following steps: carrying out asymmetric hydrogenation treatment on a mixture containing enantiomers of the multi-substituted three-membered cyclic imine compound by adopting hydrogen to obtain a single optical isomer of the multi-substituted chiral aziridine compound and / or the multi-substituted chiral three-membered cyclic imine compound; wherein the polysubstituted three-membered cyclic imine compound is a compound as shown in a formula (1), and the polysubstituted chiral aziridine compound is a compound as shown in a formula (2). According to the method disclosed by the invention, the resolution of the racemic polysubstituted three-membered cyclic imine compound is realized in an asymmetric hydrogenation manner, and a polysubstituted chiral aziridine compound with certain optical purity and a single optical isomer of the polysubstituted chiral three-membered cyclic imine compound can be obtained at the same time.

The invention discloses a preparation method of a composite material for reinforcing cultural relics, and belongs to the technical field of cultural relic reinforcement. The preparation method comprises the following steps: preparing raw materials, premixing, adding and mixing fibers, adding and mixing auxiliaries, performing ultrasonic treatment and aging, namely selecting a waterborne polyurethane dispersion as an organic polymer component, nano calcium carbonate and kaolin as inorganic mineral components, and chopped glass fibers as a fiber reinforced component; the composite material is prepared through step-by-step stirring, two-stage ultrasonic treatment and humidity-controlled aging in cooperation with auxiliaries such as a sodium polyacrylate dispersing agent, a hydroxyethyl cellulose thickening agent and an aziridine cross-linking agent. The problem that an existing cultural relic reinforcing material is large in brittleness, insufficient in flexibility, poor in compatibility with a cultural relic body and instable in reinforcing effect due to uneven dispersion is solved, and the prepared material has excellent compatibility, balanced mechanical properties and good dispersity and durability and is suitable for reinforcing and protecting various cultural relics.

The invention discloses a water-based low-VOC environment-friendly black insulating coating and a coating method thereof on the surface of an aluminum foil, belongs to the technical field of environment-friendly coatings, and is suitable for insulation protection in the fields of electronic packaging, flexible circuit boards and the like. The paint has the characteristics of low volatile organic compounds (VOC), high insulativity, excellent adhesive force and rapid low-temperature curing: 1, zero benzene residue and low VOC: water is completely used as a solvent, benzene solvents are not detected, and the VOC content is less than or equal to 50g / L (the content of a traditional solvent type paint is greater than 500g / L); 2, high insulating property: through the synergistic effect of nano aluminum oxide and boron nitride, the dielectric strength of the coating is greater than or equal to 35kV / mm (only 15kV / mm-20kV / mm); and 3, low-temperature curing and high adhesive force: an aziridine cross-linking agent is added, curing is performed at 80-100 DEG C for 3 minutes, the adhesive force is greater than or equal to 98% (a cross-cut method), and the base material does not deform.

This invention belongs to the field of organic drug synthesis and discloses a method for synthesizing bisindole cyclic compounds using di-tert-butyldiazide ketone as an amine source. Under the protection of an inert gas, 2-(2-iodophenyl)-indole 1, di-tert-butyldiazide ketone 2, a palladium catalyst, a ligand, and a base are added to an organic solvent in a specific ratio and reacted at a heating temperature. After the reaction, the bisindole cyclic compounds shown are prepared, and the target product is separated after the reaction is complete. This invention uses di-tert-butyldiazide ketone as a nitrogen source. This method has the advantages of being simple and novel, and can synthesize a series of bisindole cyclic compounds and their derivatives with high efficiency.