239 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 relates to the technical field of BOPP (biaxially-oriented polypropylene) films, in particular to a scratch-resistant adhesive-free matt film and a preparation method thereof, and the scratch-resistant adhesive-free matt film comprises a matt layer, a core layer and a thermal composite layer which are sequentially arranged, the matt layer comprises co-polypropylene, high-density polyethylene, 2.0-2.5 wt% of linear alkyl silicone (the weight-average molecular weight is 12-150 thousands, and the surface tension is 42-45 mN / m) taking maleic anhydride modified aziridine as a terminal group, and 2000-4000 ppm of spherical polymethyl methacrylate (the particle size D50 is 4.0-5.0 microns); the core layer comprises homo-polypropylene; and the thermal composite layer comprises an ethylene-vinyl acetate copolymer and 2000 to 4000 ppm of a spherical anti-blocking agent. According to the scratch-resistant adhesive-free matt film, through collaborative design of the components of the matt layer and the thermal composite layer, balance of scratch resistance, high surface tension (printing applicability) and winding and unwinding smoothness of the surface of the matt layer is achieved, and a solution for the scratch-resistant generality problem of the matt surface of the high-end BOPP matt film is provided.

The invention discloses a super-strong mute building drainage pipe and a preparation method thereof, and relates to the technical field of high polymer materials. Comprising the following raw materials in parts by mass: 100 parts of high-density polyethylene, 5-7 parts of a cold-resistant toughening agent, 8-12 parts of a synergist, 8-10 parts of a sound insulation filler and 0.3-0.5 part of an antioxidant. By introducing the synergist prepared from the components such as polyamine polyether methylene phosphonic acid, zinc nitrate hexahydrate, magnesium nitrate hexahydrate and the like, the sound insulation, flame retardance and smoke suppression capabilities of the drainage pipe can be effectively improved; by introducing the sound insulation filler prepared from the modified halloysite nanotubes, hydroxyl-terminated polydimethylsiloxane, aziridine cross-linking agent and the like, the sound insulation, flame retardance and smoke suppression capabilities of the drain pipe are further improved. Therefore, the drainage pipe prepared by the invention has a wider application prospect.

The invention discloses a preparation method of an optical OCA (Optical Clear Adhesive) and application of the optical OCA in a mobile phone folding screen, and relates to the technical field of optical cement, the optical OCA is prepared from the following raw materials in parts by weight: 50 parts of acrylate prepolymers, 2-4 parts of 3-allyl-2-mercapto-3H-quinazoline-4-ketone, 1-3 parts of diallyl disulfide, 1-3 parts of 3-[N, N-dimethyl formamide], 1-3 parts of 2, 3, 5-trimethyl-1, 3-pentanediol monoisobutyronitrile, 1-3 parts of 2, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3 The preparation method comprises the following steps: adding 3-5 parts of N, N-dimethyl-[2-(2-methylpropane-2-enoyloxy) ethyl] ammonium] propane-1-sulfonic acid inner salt, 1-3 parts of allyl succinimido carbonate, 2-4 parts of dicyclopentene methacrylate, 1-3 parts of 1, 3, 5-triacryloyl hexahydro-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5- The invention relates to a graphene quantum dot photoinitiator which is prepared from the following components in parts by weight: 1-3 parts of 1, 3, 5-triazine, 0.8-1.2 parts of a photoinitiator, 1-3 parts of an aziridine cross-linking agent, 1-3 parts of graphene quantum dots, 0.8-1.2 parts of a coupling agent and 40-50 parts of a diluent. The optical OCA adhesive is high in light transmittance and bonding strength, good in weather resistance and excellent in folding resistance.

The invention discloses a high-water-resistance waterborne polyurethane marine coating and a preparation method thereof, and belongs to the field of marine paints.The coating comprises a component A and a component B. The component A is prepared from, by weight, 50-60 parts of waterborne organic silicon modified polyurethane resin, 10-20 parts of fluorocarbon resin emulsion, 15-20 parts of nanometer reinforcing filler, 0.5-5.0 parts of polyurethane thickening agent, 0.1-0.3 part of defoaming agent, 0.2-0.5 part of wetting agent and 0.3-0.8 part of anti-settling agent; 0.3 to 0.8 part of a mildew preventive; and the component B comprises the following components in parts by weight: 0.3-1.0 part of an aziridine cross-linking agent and 2-3 parts of a dehydrating agent. When in use, the component A and the component B are mixed according to the weight ratio of 5: 1 and then are sprayed or rolled to form a coating with the dry film thickness of 80-150 microns, and the prepared high-water-resistance waterborne polyurethane marine coating has the advantages that the water absorption rate is reduced, the water resistance and the mechanical strength are improved, and the waterborne polyurethane marine coating with high water resistance, hardness and biological adhesion resistance is realized; meanwhile, low VOC and normal-temperature curing are realized, so that the application range of the coating is wider.

The invention features compounds containing an aziridine moiety and methods of synthesizing the same. The compounds may be bound to a monovalent organic moiety and may be used to bind to a target (e.g., a target protein), for example, by cross-linking the target. In some embodiments, the monovalent organic moiety is capable of binding to a presenter protein. Also disclosed are complexes containing the compounds (e.g., presenter protein / compound complexes, compound / target protein complexes, or tri-complexes). Methods of forming the complexes and methods of using the compounds and complexes to modulate biological processes are also disclosed.

The invention provides a wear-resistant and sweat-resistant acrylic coating as well as a preparation method and application thereof, and belongs to the technical field of coatings. The wear-resistant and sweat-resistant acrylic coating is prepared from the following raw materials in parts by weight: 30 to 50 parts of waterborne acrylic resin, 15 to 20 parts of cardanol-based polyurethane resin, 0.8 to 1.5 parts of an adhesion promoter, 3 to 5 parts of a titanate coupling agent, 3 to 15 parts of filler, 0.5 to 1.8 parts of a thickening agent, 0.5 to 2.0 parts of a flatting agent, 0.5 to 1.0 part of a wetting agent, 0.5 to 1.5 parts of a de-foaming agent, 0.5 to 2 parts of a cosolvent and 5 to 15 parts of water. Wherein the water-based acrylic resin is prepared from the following components: an acrylic monomer, dithioglycolic acid, tri-n-butyl borane and an aziridine cross-linking agent; the invention also provides a preparation method of the acrylic coating. A coating layer obtained by curing the acrylic coating provided by the invention is excellent in mechanical property, good in adhesive force, excellent in water resistance, scratch resistance, wear resistance, chemical resistance, perspiration resistance, corrosion resistance and the like, and can be applied to 3C product and glasses industries, and the service life of the product is prolonged.

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 discloses a supporting layer suitable for a composite current collector, a corresponding composite current collector and a battery. Wherein the supporting layer is formed by curing insulating adhesive liquid; the insulating adhesive liquid comprises a component A and a component B which are mixed, wherein the component A is at least one of polyurethane resin, acrylic resin, epoxy resin, polyester resin, polyimide, an organosilicon polymer and a modified compound thereof; the liquid B is at least one of amino resin, isocyanate, an aziridine cross-linking agent, carbodiimide, a silane coupling agent and an organic silicon tackifier; wherein the ratio of the component A to the component B is (90-99): (1-5). Compared with an existing supporting layer and an existing composite current collector, the viscous insulating layer structure can replace common PET, PP, PI and other types of base film middle supporting layer structures, the adhesive strength of the metal layer and the supporting layer is improved, and meanwhile additional hierarchical structures are avoided. And the production process is simplified, so that mass production is realized.

The invention discloses water-based ink with barrier property and a preparation process thereof, and relates to the technical field of water-based ink. Comprising the following components: modified acrylic resin, pigment, montmorillonite, a polyester type dispersant, an alkynediol wetting agent, an organic silicon composite defoaming agent, a low-viscosity modified siloxane flatting agent, an aziridine cross-linking agent and the balance of deionized water. Wherein perfluorobutyl, glycidyl ether oxygroup and hydroxyl are grafted on a molecular chain of the modified acrylic resin, the particle size of the montmorillonite is smaller than 500nm, and the radius-thickness ratio is larger than 50. The preparation process comprises the steps of nano clay pre-activation and pigment dispersion, reactive dispersion and resin grafting, low-temperature grinding and directional curing. According to the ink formula, the high-activity aziridine cross-linking agent and the flaky nano-clay filler are used in a matched mode in the modified acrylic resin, synergistic interaction is achieved through a specific formula proportion, the comprehensive barrier property of the ink is remarkably improved, and the OTR is reduced to 4.2 cc / m.day.

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 discloses a polyamine-polyester gradient copolymer, aziridinyl cationic polyester as well as a preparation method and application of the aziridinyl cationic polyester, relates to the technical field of high polymer material synthesis, and solves the problems of complex synthesis process, high cost and cytotoxicity caused by concentrated amino distribution of the current cationic polyester material. The preparation method comprises the following steps: mixing a catalyst, a promoter, N-o-nitrobenzenesulfonyl substituted methyl aziridine, cyclic anhydride and alicyclic epoxide under anhydrous and anaerobic conditions, carrying out ring-opening copolymerization reaction, and after the reaction is finished, settling to obtain the polyamine-polyester gradient copolymer. Dissolving the polyamine-polyester gradient copolymer in ultra-dry DMF under the protection of nitrogen, then adding potassium carbonate and p-tolylthiophenol, after a desulfonylation reaction is finished, settling and washing in diethyl ether, and finally performing vacuum drying to obtain the aziridinyl cationic polyester. The method is beneficial to promoting the development of polyester functionalization, and has potential application value in the fields of gene transfection, protein carriers and sewage treatment, CO2 adsorption, adhesives and the like.

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 invention discloses crystalline polyesteramide as well as a preparation method and application thereof, and relates to the technical field of high polymer materials. The method comprises the following steps: taking aziridine with a protecting group and cyclic anhydride as polymeric monomers, carrying out bulk polymerization, melt polymerization or solution polymerization under the action of a catalyst to obtain amorphous polyesteramide, and carrying out polymer post-treatment and aziridine protecting group removal to obtain the crystalline polyesteramide with a-C = O-NH-structure. The method has the advantages that the adopted monomers are rich in source, cheap and easy to obtain, the polymer is rich in structure and diversified in structure, and the polymerization method is simple. The prepared polyesteramide has excellent crystallinity and degradability, and has potential application prospects in the fields of biology, medicine, flexible electronics and the like.

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 discloses a novel C2 symmetric chiral bisamide ligand and a preparation method and application thereof, the ligand has a structure as shown in # imgabs0 #, Ar is aryl, the relative positions of two sulfur in the general formula are different, * represents a chiral center, R is 4-methylbenzyl, 4-bromobenzyl, 2, 6-dimethylbenzyl, methyl or benzyl, and n represents 1 or 2. Dithiophenol and (2S, 3S)-2, 3-diphenylaziridine react to obtain an intermediate, and the intermediate and nitrogen-substituted chiral cyclic amino acid or 2-diphenylphosphinobenzoic acid are subjected to dehydration condensation to obtain various ligands with novel structures. A catalyst formed by complexing the ligand and an allyl palladium chloride dimer can be used as a chiral ligand for efficiently catalyzing an asymmetric allyl alkylation reaction.

To provide an aqueous adhesive capable of obtaining an adhesive sheet for surface protection having good releasability of an adhesive sheet, short aging and good coating appearance.SOLUTION: There is provided an aqueous adhesive used for an adhesive sheet for surface protection which contains an acrylic polymer (A) and a compound (B) having two or more aziridinyl groups in the molecule (B), wherein the acrylic polymer (A) is an emulsion polymerization product of a monomer mixture containing a (meth)acrylic acid alkyl ester (a1) having an alkyl group having 4 to 12 carbon atoms, a carboxyl group-containing monomer (a2) and a hydroxyl group-containing monomer (a3), contains 0.1 to 3.0 mass% of the carboxyl group-containing monomer (a2) and 0.5 to 5.0 mass% of the hydroxyl group-containing monomer (a3) in 100 mass% of the monomer mixture and has a gel fraction of 80 to 100%.SELECTED DRAWING: None

The present disclosure provides adsorbents and contactors, methods of capturing CO2 using the adsorbents and contactors, structures including the adsorbents, and systems and devices for capturing CO2 using the adsorbents and contactors. In one aspect, the disclosure provides an adsorbent comprising a CO2-philic phase and a carrier. The present disclosure provides adsorbents and contactors that include a CO2-philic phase and a support wherein the CO2-philic phase includes a modified amine polymer that is a reaction product of an amine and aziridine or azetidine.

Compounds containing aziridine moieties and methods for their synthesis are provided. The compounds can bind to monovalent organic moieties and can be used to bind targets (e.g., target proteins), such as by crosslinking the targets. In some embodiments, the monovalent organic moiety is capable of binding to a presenting protein. Also disclosed are complexes (e.g., presenting protein / compound complexes, compound / target protein complexes, or triple complexes) containing the compounds. Methods of forming the complexes and methods of modulating biological processes using the compounds and complexes are also disclosed.

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.