208 results about "Hydroxynaphthalenes" patented technology

The invention discloses a preparation method of a permanent red pigment for an acid and alkali resistant coating, and belongs to the technical field of pigment preparation, a 2B acid derivative is diazotized and then coupled with 2-hydroxy-3-naphthoic acid, then a calcium chloride aqueous solution is added for color lake to obtain pigment particles, and finally the surfaces of the pigment particles are coated with silicon dioxide to obtain the permanent red pigment for the acid and alkali resistant coating. According to the permanent red pigment for the acid and alkali resistant coating prepared by the preparation method disclosed by the invention, the acid and alkali resistance and environmental stability of the pigment are further enhanced while the excellent characteristics of original pigment red 48: 2 are maintained, and the application performance of the pigment is remarkably improved.

The invention provides a polyarylester nanofiber and a preparation method thereof, and the preparation method comprises the following steps: firstly, carrying out acetylation reaction on 4-hydroxybenzoic acid (HBA) and 6-hydroxy-2-naphthoic acid (HNA) to obtain acetylated HBA and acetylated HNA, and then carrying out copolymerization on acetylated HBA and acetylated HNA and 4-hydroxybutyric acid (GHB) to obtain HBA / GSB / HNA copolymerized arylester granules B; the preparation method comprises the following steps: carrying out blending spinning on granules B and HBA / HNA copolymerized aromatic ester granules A obtained by copolymerizing acetylated HBA and acetylated HNA in the prior art, putting the obtained blended polyarylate fibers into an organic solvent containing a strong base, carrying out chemical etching and deprotonation, carrying out disassembly from top to bottom to obtain a polyarylate nanofiber suspension, and finally carrying out suction filtration and drying to obtain the polyarylate nanofibers. According to the preparation method disclosed by the invention, the blended polyarylester fiber containing an aliphatic chain is subjected to etching and deprotonation treatment through strong base to disassemble the polyarylester nanofiber, and a certain amount of-CH2-structure is introduced into a main chain, so that disassembly preparation of the nanofiber is facilitated, and the polyarylester nanofiber with uniform diameter and length and controllable length-diameter ratio is obtained.

The invention provides polyester and a preparation method and application thereof, the polyester comprises a structural unit derived from the following monomer components: at least one monomer component I selected from hydroxybenzoic acid or hydroxynaphthoic acid; and at least one monomer component II, wherein the monomer component II is selected from p-hydroxybenzoic acid containing a substituent group. A small amount of the monomer component II is introduced into the polyester material, interaction points are provided for chain segments of the polymer, the chain segments are promoted to form a branched structure, and therefore the melt strength of the polymer is well improved.

The invention discloses a method for preparing high molecular weight thermotropic liquid crystal polyester through melt coupling solid phase polycondensation. The method comprises the following steps: mixing p-hydroxybenzoic acid, 6-hydroxy-2-naphthoic acid and a catalyst 1-methylimidazole according to a specific molar ratio of (70-75): (25-30) to synthesize a liquid crystal polyester prepolymer with specific logarithmic viscosity; the preparation method comprises the following steps: crushing and drying a liquid crystal polyester prepolymer, placing prepolymer particles in a solid phase polycondensation device, accurately controlling the time and temperature of the polycondensation reaction, carrying out heating reaction in a nitrogen atmosphere to obtain high molecular weight thermotropic liquid crystal polyester, taking out the high molecular weight liquid crystal polyester, and carrying out viscosity test. In the preparation process of the prepolymer, the prepolymer with proper logarithmic viscosity can be effectively prepared by controlling the reaction temperature and time, so that the controllable preparation of the polymer is realized; the solid-phase polycondensation time required for obtaining the high-molecular-weight polymer is shortened by crushing the prepolymer into particles with different diameters, so that the solid-phase polycondensation efficiency is improved.

The present invention relates to a photovoltaic water-based soldering flux and a preparation method and application thereof, comprising the following raw materials in parts by weight: 1-5 parts of cosolvent, 0.1-3 parts of wetting agent, 0.1-3 parts of polyethylene glycol, 1-8 parts of activator microcapsules, 0.1-1 parts of antioxidant, and 100 parts of water; wherein the activator microcapsules include capsule cores and capsule materials wrapping the capsule cores, and the capsule cores are composite activators; wherein the composite activator is a composition of an organic acid and a protective agent; the organic acid is a composition of 3-hydroxy-2-naphthoic acid, oleic acid and methylsuccinic acid; the protective agent is a composition of trimethylsiloxane and a quaternary ammonium salt cationic fluorocarbon surfactant. The soldering flux of the present invention uses water as the main solvent, and the soldering flux is more suitable for the preparation of photovoltaic cell chip assemblies with a hot welding temperature of 150-230°C, and the soldering flux can continuously provide activity during welding.

The invention relates to the technical field of chemical intermediates, and particularly discloses a preparation method of a givelastat intermediate.According to the preparation method, an initiator compound 5 can be synthesized by adopting cheap 2-hydroxy-6-naphthoic acid (CAS: 16712-64-4, 141 yuan / kg), and the preparation method is different from a method in the prior art. A gemvelastat intermediate compound 4 is synthesized from a compound 5 through a three-step reaction, compared with the prior art, the yield is high, industrial amplification production is more facilitated, in the process of synthesizing a compound 6 from the compound 5, acetonitrile can be adopted as a cyanide source in a reaction system, activated hydroxyl is subjected to a coupling reaction, and the yield is high. In the process of synthesizing a compound 6 from a compound 7 instead of a traditional metal cyanide, or in the process of synthesizing a compound 6 from another compound 5, a cheap cuprous cyanide and cuprous iodide system is adopted for a coupling reaction, and in the process of synthesizing a compound 4 from a compound 7, an acetic acid and sodium triacetoxyborohydride reaction system is adopted, so that the compound 6 is synthesized. And the important intermediate of the givelastat can be obtained with high yield.

The invention discloses a cool breathable fiber and a preparation method thereof, and relates to the field of fibers. When the cool-feeling breathable fiber is prepared, shell powder sequentially reacts with 3-chloropropyltrimethoxysilane, 2, 6-dihydroxy naphthol and 3, 3-diphenyl-2-propyne-1-alcohol, and functionalized shell powder is prepared; the preparation method comprises the following steps: reacting (formylmethyl) diethyl phosphate with (4-pyridyl) acetone, firstly polymerizing with dimethyl terephthalate and ethylene glycol, and then reacting with N-[4-(aminomethyl) phenyl] guanidine to prepare modified polyester; and finally, mixing the modified polyester, the functionalized shell powder and zinc acetate, and spinning to obtain the cool breathable fiber. The cool breathable fiber prepared by the invention has flame-retardant, durable and antibacterial capabilities.

The invention discloses a high-viscosity anti-skid rubber asphalt waterproof coating and a preparation method thereof, wherein the high-viscosity anti-skid rubber asphalt waterproof coating comprises asphalt, styrene-butadiene latex, modified epoxy resin emulsion, tackifier, defoamer and filler; the modified epoxy resin emulsion comprises modified epoxy resin, emulsifier and water; the modified epoxy resin is prepared by reacting 2-hydroxy-1-naphthaldehyde, allyl bromide and phenolic epoxy acrylate. The high-viscosity anti-skid rubber asphalt waterproof coating provided by the invention has excellent bonding ability and mechanical strength, can improve the bonding effect and stability of waterproof coating and material, and then achieve the anti-skid effect, and can improve the high temperature resistance of waterproof coating, extend its service life and expand its application range, so that it can be widely used in the field of waterproof coating.

To provide a chemically amplified positive resist composition that can give a resist film which has extremely high isolated space resolution, small LER, excellent rectangularity, and on which formation of a resist pattern with suppressed etching resistance or pattern collapse is possible, and a resist pattern forming method using the chemically amplified positive resist composition.SOLUTION: A chemically amplified positive resist composition contains: (A) a base polymer which includes a repeating unit derived from hydroxystyrene or hydroxynaphthalene and a repeating unit derived from hydroxystyrene in which a hydroxy group is protected by acid-labile group or hydroxynaphthalene in which a hydroxy group is protected by acid-labile group, and in which dissolubility to alkali aqueous solution increases by acid action, and a dispersion degree is 1.0 to 1.19; (B) photo-acid generator expressed by the following formula (B); and (C) organic solvent.SELECTED DRAWING: None

The invention relates to a fluorescent probe for hypochlorous acid detection and a preparation method and application thereof, the chemical name of the fluorescent probe for hypochlorous acid detection is 5-butyl-10, 10-difluoro-9-(4-(methylthio) phenyl)-5-hydro-4H, 10H-9 lambda 4, 10 lambda 4-benzo [de] [1, 3, 2] oxazaboraza [6, 5-g] isoquinoline-4, 6-diketone, and the structural formula of the fluorescent probe for hypochlorous acid detection is as shown in the following formula I. The invention further discloses a preparation method of the fluorescent probe for hypochlorous acid detection. According to the fluorescent probe for hypochlorous acid detection, N-butyl-3-aldehyde-4-hydroxy-1, 8-naphthalimide and (E)-2-butyl-6-hydroxy-5-(((4-(methylthio) phenyl) imino) methyl)-1H-benzo [de] isoquinoline-1, 3 (2H)-diketone are used as raw materials, and the fluorescent probe can be used for detecting hypochlorous acid. Compared with the prior art, the fluorescent probe for hypochlorous acid detection is simple and convenient in synthesis method, simple and easily available in raw materials, good in hypochlorous acid selectivity, relatively high in sensitivity and large in Stokes shift, and has a very good application prospect in hypochlorous acid detection.

The invention relates to the technical field of epoxy resin, and discloses a preparation process of toughened modified epoxy resin, tetravinyl cyclotetrasiloxane reacts under epoxidation of m-chloroperoxybenzoic acid to obtain tetraepoxy cyclotetrasiloxane, the tetraepoxy cyclotetrasiloxane and amino in naphthylamine are subjected to ring-opening reaction to obtain tetra (hydroxy naphthylamine) cyclotetrasiloxane, and the tetra (hydroxy naphthylamine) cyclotetrasiloxane is subjected to ring-opening reaction to obtain the toughened modified epoxy resin. Carrying out cross-linking polymerization reaction on four hydroxyl groups contained in the hyperbranched polymer and isophorone diisocyanate to obtain a hyperbranched polymer containing naphthalene rings and organic silicon; and adding the hyperbranched polymer containing the naphthalene ring and the organic silicon into the epoxy resin for curing to obtain the toughened modified epoxy resin. When the hyperbranched polymer prepared by the method is applied to epoxy resin, the mechanical properties such as thermal stability and toughness of an epoxy resin material can be effectively improved.

The present invention provides 1-hydroxy-2-naphthoate or pamoate of cariprazine, and / or its new solid forms, as well as its pharmaceutical compositions, preparation methods and uses. The salts and solid forms of cariprazine provided by the present invention, especially cariprazine 1-hydroxy-2-naphthoate among the poorly soluble salts of cariprazine, conform to the advantages of long-acting sustained-release preparations, can be developed into suspension injections, and at the same time can overcome the risks of dissociation of existing salt forms such as cariprazine hydrochloride or the problem of not having a sustained-release effect, can achieve the effect of long-term drug administration, and greatly improve the compliance of patients as well as the bioavailability and drug safety of the drug.

The invention discloses a preparation method of a pigment for low-oil-absorption pigment red 57: 1 printing ink, and belongs to the technical field of pigment synthesis. 4-aminotoluene-3-sulfonic acid is diazotized and then coupled with 3-hydroxy-2-naphthoic acid, a carboxyl-terminated hyperbranched polymer and an ionic liquid are added into a pigment crude product compound obtained after the coupling reaction is completed, and the pigment for low-oil-absorption pigment red 57: 1 printing ink is obtained. And finally adding a calcium chloride aqueous solution for color lake. The pigment for low-oil-absorption pigment red 57: 1 printing ink, prepared by the invention, not only has lower oil absorption, but also has the advantages of strong tinting strength, easiness in dispersion and high stability, and has good processing and application performance.

The invention discloses a polyphenyl ether resin composition, a polyphenyl ether composite material and a preparation method and application thereof. The polyphenyl ether resin composition is obtained by reacting polyphenyl ether and naphthoic acid compounds in a melt, the polyphenyl ether has a repeating unit with the following structure: R1, R2, R3 and R4 are respectively and independently hydrogen, halogen, primary or secondary lower alkyl, phenyl, halogenated alkyl, alkoxy or halogenated alkoxy; the naphthoic acid compound is at least one of naphthoic acid or hydroxyl naphthoic acid. Compared with polyphenyl ether resin, the polyphenyl ether resin not only can improve the gas barrier property of the polyphenyl ether composite material in a melt, but also can improve the high-temperature injection molding processing stability of the polyphenyl ether composite material.

The present invention provides a method for preparing CI Pigment Orange 68, belonging to the technical field of pigment preparation. 2-hydroxy-1-naphthaldehyde and 5,6-diaminobenzimidazolone are subjected to a condensation reaction in an acidic environment to prepare a Schiff base. The prepared Schiff base is subjected to a complexation reaction with nickel chloride and sodium acetate in an acidic environment. After the complexation reaction is completed, CI Pigment Orange 68 is obtained through post-processing. Compared with the prior art, this method not only avoids the use of the toxic solvent DMF, but also reduces the temperature required for the reaction, can reduce the output of organic waste liquid, has low cost, is environmentally friendly, and is safe to operate. The prepared CI Pigment Orange 68 has excellent properties such as high hue saturation, high transparency, bright color, strong hydrophilicity, and good dispersion stability.

The present application relates to the field of fluorescent carbon nanomaterials, in particular to a method for preparing pure purple light oxygen-doped carbon quantum rings with a half-peak width of 18 nm and a quantum yield close to 100% and applications thereof. The present application uses 2,3-dihydroxynaphthalene as a carbon source precursor, and prepares narrow-band purple light carbon quantum rings with a quantum yield close to 100% through a solid-phase catalytic reaction. The carbon quantum rings prepared by the present application have a hexagonal ring structure with oxygen doping, and have a wide application prospect in the field of display devices.

The invention discloses application of 1, 4-dihydroxy-2-naphthoic acid in improvement of animal growth performance and intestinal health, and belongs to the technical field of feed additives. According to the invention, the 1, 4-dihydroxy-2-naphthoic acid is added into the basic feed, and tests prove that after the 1, 4-dihydroxy-2-naphthoic acid is added, the average daily gain and the average daily feed intake of broilers and piglets can be improved, and the feed conversion ratio is reduced; the piglet diarrhea can be improved, the development of the stomach and the small intestine of the piglet can be promoted, the morphological structure of the jejunum of the piglet can be improved, the development of the intestinal tract can be promoted, the activity of stem cells of the intestinal tract of the piglet can be regulated, and then the development of the gastrointestinal tract is promoted. Therefore, by adding the 1, 4-dihydroxy-2-naphthoic acid into the feed, the growth performance and the intestinal health of animals can be improved, the development of gastrointestinal tracts is promoted, the activity of the intestinal stem cells is regulated and controlled, and a new strategy is provided for improving the growth performance and the intestinal health of the animals.

The invention discloses a PC / ABS composite material and a preparation method thereof, and relates to the technical field of high polymer materials. The PC / ABS composite material is prepared from the following raw materials in parts by weight: 60 to 70 parts of PC, 30 to 40 parts of ABS, 3 to 6 parts of a toughening agent, 2 to 3 parts of a modified anti-ultraviolet agent, 2 to 4 parts of a flame retardant and 0.5 to 1 part of an antioxidant. A brown polymer is prepared from urotropin and p-aminophenol, then the brown polymer, glycidyl methacrylate and styrene are subjected to graft copolymerization to prepare a novel graft polymer, and finally the graft polymer and 6-(1, 3-dihydro-2H-benzo [d] [1, 2, 4] triazole-1-yl)-1, 2, 4-triazole-1-yl)-1, 2, 4-triazole-1-yl)-1, 2, 4-triazole-1-yl)-1, 2, 4-triazole-1-yl)- 3] triazole-2-yl)-7-hydroxynaphthalene-2-sodium sulfonate is subjected to a reaction to prepare the modified anti-ultraviolet agent. The PC / ABS composite material prepared by the invention has excellent mechanical properties and ultraviolet aging resistance.

Provided is a large specific surface area isomelanin-based carbon nanomaterial and a preparation method thereof. The preparation method of the isomelanin nanomaterial is to prepare a mixed solution of 1,8-dihydroxynaphthalene in acetone and water, and add a trichloride hexahydrate iron solution to the solution to form a 1,8-dihydroxynaphthalene-iron ion complex solution, then add a potassium dichromate solution to stir the reaction to obtain a black turbid solution, and centrifuge and wash to obtain the isomelanin nanomaterial; the isomelanin nanomaterial is subjected to high temperature heat treatment under an inert atmosphere, and KOH activation is performed to obtain an isomelanin nanomaterial with a large specific surface area. The preparation method of a supercapacitor electrode sheet is to mix the prepared carbon nanomaterial, carbon black and polytetrafluoroethylene, ultrasonically disperse them in an aqueous solution, dry them, roll them to obtain a black film, and press them on a current collector to obtain an electrode sheet. The isomelanin nanomaterial with a large specific surface area prepared by the method has high specific capacitance and cycle stability, and has broad applications in energy fields including supercapacitors.

The present invention relates to the technical field of H acid preparation, and in particular to a process for producing H acid by alkali fusion under an ammonia environment. Amino T acid generates a chromotropic acid byproduct during alkali fusion, and the chromotropic acid is the amino group of H acid replaced by a hydroxyl group. The hydroxyl group on the naphthalene ring can generate an amino group under the catalysis of sulfite, so the chromotropic acid generates H acid under an ammonia environment. In the present invention, alkali fusion under an ammonia environment can effectively inhibit the generation of chromotropic acid by the side reaction of alkali fusion, and improve the H acid yield. Based on amino T acid, the H acid yield can be increased to about 85%, effectively reducing the cost.

The invention provides a purification method of a high-purity electronic-grade photoacid generator derived from (4, 7-dihydroxy-1-naphthyl) dimethyl sulfonium trifluoromethanesulfonate. The problem that photo-acid cannot be purified by traditional recrystallization or directly through an ion exchange column and the like is solved, and the electronic grade standard is achieved. The preparation method comprises the following steps: firstly synthesizing (4, 8-dihydroxy-1-naphthyl) dimethyl sulfonium hydrochloride, then reacting with sodium trifluoromethanesulfonate to generate a crude product (4, 7-dihydroxy-1-naphthyl) dimethyl sulfonium trifluoromethanesulfonate, removing impurities from ethyl acetate, recrystallizing by using methanol and dichloromethane to obtain a pure product, and finally adsorbing by using resin to obtain the high-purity electronic-grade photoacid generator. According to the invention, the stability is high, the metal ion content is low, the purification process is convenient to process, the product is used as a photoresist-level core main material, the product is widely applied in the fields of semiconductor photoresist, other imaging systems, photocureable coatings and the like, the market scale is continuously expanded, and the product is an indispensable key material in semiconductor manufacturing and other related fields.

The invention relates to a 2-succinyl-5-enol acetonyl-6-hydroxy-3-cyclohexene-1-carboxylic acid synthase mutant and application thereof, and belongs to the technical field of enzyme engineering. According to the invention, a key residue of 2-succinyl-5-enolacetonyl-6-hydroxy-3-cyclohexene-1-carboxylate synthase is obtained by combining protein sequence comparison and alanine scanning strategies, the key residue is subjected to random mutation, and the menadione pathway resistant intermediate metabolite 1, 2, 3, 4-tetracarboxylic acid synthase is obtained through multiple rounds of screening. The mutant MenDW322IR323F which is subjected to feedback inhibition by using 2, 4-dihydroxy-2-naphthoic acid is synthesized, the heptaene menadione production capacity of the recombinant bacillus subtilis constructed according to the method is improved, the yield is 1.22 times that of a control strain, and the final yield reaches 186.5 mg / L. The invention not only provides a new direction for transformation of a menadione approach of bacillus subtilis, but also is beneficial to industrial expanded production of heptaene menadione.

The invention discloses trifluoromethyl benzyl ether substituted amino acid derivatives as well as a preparation method and application thereof, and belongs to the technical field of organic compound synthesis and medicine. The synthesis method of the trifluoromethyl benzyl ether substituted amino acid compound comprises the following steps: firstly, carrying out a Mitsunobu reaction on a benzyl alcohol compound and hydroxy naphthaldehyde (or hydroxy benzaldehyde), then generating Schiff base with amino-acid ester hydrochloride, then reducing with sodium cyanoborohydride, and then simply hydrolyzing to obtain the trifluoromethyl benzyl ether substituted amino acid compound. The preparation method provided by the invention has the characteristics of simple steps, mild reaction conditions and fast reaction, and meets the requirements of green chemistry. The compound prepared according to the method can selectively regulate the S1P1 receptor without exciting the S1P3 receptor, and is expected to be developed into a novel preparation for treating idiopathic pulmonary fibrosis.

The invention relates to a method for preparing a hydroxyl naphthaldehyde derivative by using a cobalt complex, which comprises the following step: by taking naphthol and paraformaldehyde as raw materials and the cobalt complex containing an ortho-carborane benzothiazole structure as a catalyst, reacting at room temperature to synthesize the hydroxyl naphthaldehyde derivative. Compared with the prior art, the cobalt complex containing the ortho-carborane benzothiazole structure is applied to the reaction for catalytically synthesizing the hydroxyl naphthaldehyde derivative through the one-pot method, the use equivalent of the catalyst is low, the reaction condition is mild, the substrate universality is high, and the yield is high.

A method of tautomerizing tetralin-1,4-dione from 1,4-dihydroxynaphthalene is described, which comprises vaporizing a liquid feedstock composition comprising tetralin-1,4-dione and 1,4-dihydroxynaphthalene, then solidifying the vapor to form a solid crude composition with an increased tetralin-1,4-dione concentration relative to the liquid feedstock composition. An apparatus for tautomerizing 1,4-dihydroxynaphthalene into tetralin-1,4-dione is also described, which apparatus includes a reaction vessel comprising an internal chamber and a cold plate disposed within the internal chamber.

The invention discloses a solid conductive powder coating composition and a preparation method thereof, and belongs to the technical field of powder coatings. The preparation method comprises the following steps: adding epoxy resin, modified fibers, modified graphene oxide, modified 1, 6-dihydroxynaphthalene, carbon black, 2-methylimidazole, a flatting agent and barium sulfate into a stirrer, mixing at a high speed of 300-400r / min for 5-10min, then putting the mixed material into a double-screw extruder for melt extrusion, tabletting, cooling, crushing and sieving to obtain the solid conductive powder coating composition. The solid conductive powder coating composition disclosed by the invention has good conductivity and also improves the corrosion resistance.

The invention discloses a europium-functionalized metal-organic framework-based dual-emission fluorescent probe and a preparation method and application thereof, and relates to the field of organic metal frameworks and fluorescence detection.The preparation method comprises the steps that ZrCl4, pyromellitic acid, 6-hydroxy-2-naphthoic acid and water are mixed, acetic acid is added, and a mixture is obtained; heating and refluxing the mixture, centrifuging to obtain residues, washing and drying to obtain UCHNA; the preparation method comprises the following steps: dispersing UCHNA in an aqueous solution of Eu (NO3) 3.6 H2O, heating to react, collecting white precipitate, washing and drying to obtain the Eu (NO3) 3.6 H2O. The invention has the beneficial effects that the UiO-66 type MOF is modified by using the luminous ligand 6-hydroxy-2-naphthoic acid, post-modification is performed by using Eu < 3 + >, the Eu < 3 + >-MOF with dual emission of blue and red wavebands is reasonably designed and synthesized, crystal violet (CV) and quinine (QN) are selectively and quickly responded through different response modes, the detection limit is low, and the Eu < 3 + >-MOF is superior to most reported sensors.

In order to increase the total light transmittance while maintaining a high haze value of the thermoplastic liquid crystal polymer, a thermoplastic liquid crystal polymer molded body is produced with a haze value of 99% or more, a coefficient of thermal expansion of 16 to 27 ppm / °C, and a correlation between the absorption coefficient (ε) and the thickness (x) satisfying ε ≤ 0.21x<supgt;‑0.55< / supgt>. The thermoplastic liquid crystal polymer may be a polyester containing repeating units derived from a substance selected from the group consisting of p-hydroxybenzoic acid and 6-hydroxy-2-naphthoic acid; 6-hydroxy-2-naphthoic acid, terephthalic acid, and p-aminophenol; p-hydroxybenzoic acid, 6-hydroxy-2-naphthoic acid, and terephthalic acid; 6-hydroxy-2-naphthoic acid, terephthalic acid, p-aminophenol, isophthalic acid, hydroquinone, and naphthalenedicarboxylic acid; and p-hydroxybenzoic acid, terephthalic acid, and 4,4'-dihydroxybiphenyl.

The invention discloses an infrared barrier polyurethane coating and a preparation method thereof, and relates to the technical field of coatings. When the infrared barrier polyurethane coating is prepared, 7-cyano-8-hydroxy-1, 6-naphthyridine and pent-4-enohydrazide are subjected to a reaction, and a pentenyl triazole monomer is prepared; polymerizing a pentenyl triazole monomer and hexenyl ethylene carbonate, and coating the cesium tungsten bronze powder with the polymerized pentenyl triazole monomer and hexenyl ethylene carbonate to prepare modified cesium tungsten bronze powder; reacting the cardanol diglycidyl ether with carbon dioxide to obtain cyclic carbonated cardanol; the cyclic carbonated cardanol, the modified cesium tungsten bronze powder, functional microspheres, cyclohexanone, isophorone diamine and 1, 3-bis (3-aminopropyl)-1, 1, 3, 3-tetramethyldisiloxane are uniformly mixed, and the infrared barrier polyurethane coating is prepared. The infrared barrier polyurethane coating prepared by the invention has excellent flame retardance, aging resistance and infrared barrier property.

The invention provides an oxidized ore gold collecting agent which comprises the following components in parts by weight: 40 to 200 parts of aliphatic amine, 20 to 40 parts of aliphatic sulfate, 8 to 12 parts of methyl isobutyl carbinol, 3 to 6 parts of 2-mercaptobenzimidazole, 2 to 7 parts of ammonium citrate and 1 to 3 parts of 2-hydroxy-3-naphthalene mehydroxamic acid. The collecting agent can obtain a more stable adsorption layer and higher adsorption layer density, the adsorption capacity of the collecting agent on a bubble / flotation liquid phase interface is increased, and the yield reaches 80% or above.