114 results about "Benzoin" patented technology

The invention discloses a flame-retardant insulating powder coating for a new energy automobile and a preparation method of the flame-retardant insulating powder coating, and belongs to the technical field of coatings. The flame-retardant insulating powder coating for the new energy automobile is prepared from the following raw material components in parts by mass: 380 to 384 parts of epoxy resin, 56 to 58 parts of a toughening agent, 5 to 10 parts of modified flame-retardant filler, 100 to 101 parts of a composite curing agent, 5 parts of a flatting agent, 1 part of benzoin and 0.7 part of an accelerant, the toughening agent is obtained by carrying out a reaction on an isophorone diisocyanate tripolymer, 4-bromophenol and N-p-coumaroyl tyramine; the modified flame-retardant filler is obtained by firstly wrapping hexagonal boron nitride with polydopamine and then modifying with a silane coupling agent; the silane coupling agent is obtained by combining 4-benzonitrile oxygen butyl trimethoxy silane and a sulfydryl silane coupling agent; and the composite curing agent is obtained by combining 4, 4-diaminodiphenylmethane and amino-sulfydryl functional organic polysiloxane.

The invention discloses a high-adhesiveness corrosion-resistant powder coating and a preparation method thereof, and belongs to the technical field of coatings. The powder coating is prepared from the following raw materials: modified epoxy resin, composite modified filler, a curing agent, a flatting agent, a dispersing agent, benzoin, sodium fluoride and the like. The epoxy resin is modified, amino is introduced to enhance the interaction with the grafted phosphate nano-silica, and BYK-163 is introduced, so that the compatibility is improved. In the composite modified filler, nano silicon dioxide A is grafted with a phosphate group, and can form a chemical bond with metal and quickly form a passive film; the nano silicon dioxide B is grafted with a fluorine-containing group, so that the coating is endowed with low surface energy and chemical stability, and long-acting protection is realized. Sodium fluoride destroys metal lattices at high temperature to form anchor points, and adhesive force is improved. The problem that a traditional powder coating is insufficient in adhesive force and corrosion resistance is solved, and the powder coating is suitable for metal protection in various complex environments and has wide application prospects.

The invention discloses a medicinal silica gel desiccant with high adsorption speed and a preparation method thereof, and belongs to the technical field of desiccant preparation. The medicinal silica gel desiccant with high adsorption speed is prepared from the following components in parts by weight: 50-65 parts of silica gel, 4-8 parts of calcium chloride, 3-6 parts of magnesium sulfate, 3-7 parts of ferric oxide, 1-4 parts of an antibacterial compound, 5-10 parts of a modified surfactant, 1-2 parts of potassium hydroxide, 10-30 parts of ice water, 2-4 parts of acrylic acid, 2-4 parts of acrylamide and 0.4-0.8 part of sodium carboxymethyl starch. 0.2 to 0.3 part of benzoin dimethyl ether, 0.005 to 0.015 part of polyethylene glycol diacrylate and 1 to 2 parts of methanol. The silica gel desiccant prepared by the method has excellent antibacterial performance, adsorption rate and adsorption capacity.

The invention discloses an epoxy powder coating and a preparation method thereof, and belongs to the technical field of powder coating production, firstly, the epoxy powder coating is prepared from the following raw materials in parts by mass: 100 parts of epoxy resin, 15-20 parts of modified phenolic resin, 12-15 parts of carboxyl-terminated polyester resin, 4-8 parts of nano cerium oxide coated mica, 1.5-2.0 parts of a flatting agent and 0.5-1.0 part of benzoin; the modified phenolic resin is prepared by carrying out addition on bisphenol A phenolic resin and DOPO, neutralizing and carrying out reduced pressure distillation; the carboxyl-terminated polyester resin is prepared by carrying out esterification polycondensation on terephthalic acid, isophthalic acid, neopentyl glycol and trimethylolpropane, and then modifying by trimellitic anhydride; the nano cerium oxide coated mica is prepared by coating white mica powder with cerium oxide precipitate, and then carrying out surface treatment and crushing.

The invention discloses an anti-fingerprint scratch-resistant ink coating heat transfer printing process, which comprises the following steps of: heating and melting modified ink, coating the modified ink on transfer printing paper, drying, engraving a design pattern by using laser, adhering the transfer printing paper and a transfer printing base material, carrying out hot-pressing transfer printing, and irradiating by using ultraviolet light to finish ink heat transfer printing. The modified ink is prepared from the following raw materials in parts by weight: 20-30 parts of modified resin, 20-25 parts of flax wax, 15-20 parts of beewax, 15-20 parts of castor oil, 8-10 parts of a reinforcing additive, 3-5 parts of modified filler, 1-1.5 parts of KH570, 0.5-1 part of benzoin diethyl ether and 15-20 parts of pigment, and the raw materials are subjected to double-bond polymerization in the raw material mixing and illumination process, so that the cross-linking curing sites of the ink are increased; through cooperation with a layered structure of a modified filler base material graphene, the scratch resistance of the ink is improved, and meanwhile, the reinforcing additive contains flurane, long-chain alkyl and polysiloxane chain segments, so that residues of fingerprints on the surface of the ink can be reduced.

The invention belongs to the field of polymer compositions, and particularly relates to an anti-yellowing polyphenyl ether composite material as well as a product and application thereof. The invention provides a yellowing-resistant polyphenyl ether composite material, which is prepared from the following components in parts by weight: 30 to 70 parts of polyphenyl ether resin, 15 to 40 parts of polystyrene, 0 to 15 parts of flame retardant, 0 to 30 parts of reinforcing filler, 0 to 10 parts of compatilizer, 0.1 to 1 part of benzoin, 0.01 to 0.3 part of DOPO (9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide) and 0 to 5 parts of other auxiliaries. The application accidentally finds that 0.01-0.3 part of DOPO with extremely low parts is introduced into the benzoin processing yellowing resistant system of polyphenyl ether, and through the synergistic effect of benzoin and DOPO components and contents, the processing yellowing resistant performance of polyphenyl ether is further improved in the processing process of polyphenyl ether, and the processing yellowing resistant performance of the polyphenyl ether is further improved. And the yellowing resistance in a hot oxygen environment, a natural environment and a humid and hot environment is also greatly improved.

The invention provides a high-flexibility low-temperature fast curing powder coating for reinforcing steel bars as well as a preparation method and application thereof, and belongs to the technical field of powder coatings. The powder coating comprises the following components in parts by mass: 180-200 parts of high-toughness epoxy resin, 45-48 parts of a high-toughness phenolic curing agent, 6-8 parts of a flatting agent, 2-4 parts of a brightener, 1-2 parts of benzoin and 55-70 parts of pigment filler. The high-toughness epoxy resin is obtained by polymerizing bisphenol F diglycidyl ether, 1, 10-decanediol, glyceryl monobutyrate, hexamethylene diisocyanate, dodecanedioic acid, triglycidyl p-aminophenol and the like; the high-toughness phenolic curing agent is obtained by polymerizing bisphenol F diglycidyl ether, 1, 4-butanediol diglycidyl ether and bisphenol F. The coating is used for low-temperature rapid curing molding on the surface of the reinforcing steel bar to obtain a coating, and has excellent bending resistance and corrosion resistance.

The invention discloses a scratch-resistant flame-retardant insulating powder coating, a preparation method thereof and application of the scratch-resistant flame-retardant insulating powder coating in rail transit and new energy automobiles, and relates to the technical field of polysiloxane powder coatings. The scratch-resistant flame-retardant insulating powder coating is prepared from the following raw materials in parts by weight: 100 to 120 parts of polysiloxane epoxy resin, 10 to 20 parts of modified curing agent, 5 to 10 parts of flame retardant, 3 to 6 parts of flexibilizer, 2 to 3 parts of flatting agent, 1 to 2 parts of benzoin and 8 to 10 parts of mica powder. The scratch-resistant flame-retardant insulating powder coating prepared by the invention has good impact resistance, flame retardance, adhesive force and insulating property.

The invention discloses a flame-retardant corrosion-resistant coating and a preparation method thereof, and relates to the technical field of fluorocarbon resin powder coatings. The flame-retardant corrosion-resistant coating comprises the following raw materials in parts by weight: 15-25 parts of fluorocarbon resin, 40-50 parts of epoxy resin, 3-5 parts of a curing agent, 5-7 parts of a reinforcing agent, 4-6 parts of a corrosion inhibitor, 6-8 parts of filler, 1-2 parts of a flatting agent and 0.5-1 part of benzoin. The preparation method comprises the following steps: reacting phosphonitrilic chloride trimer with p-hydroxybenzaldehyde to generate an intermediate 1, reacting the intermediate 1 with p-aminobenzoic acid to generate an intermediate 2, and reacting the intermediate 2 with 2-heptyl ethylene oxide to generate the reinforcing agent. The flame-retardant corrosion-resistant coating prepared by the invention has excellent mechanical properties, corrosion resistance, aging resistance and flame retardance.

The invention provides a powder coating as well as a preparation method and application thereof. The powder coating comprises the following components in parts by weight: 50-70 parts of polyester resin, 2-10 parts of functionalized silicon dioxide, 5-10 parts of a curing agent, 5-20 parts of titanium dioxide, 0.2-0.5 part of benzoin, 15-30 parts of barium sulfate and 0.2-0.5 part of a flatting agent, the functionalized silicon dioxide comprises silicon dioxide, polydopamine and a silane coupling agent, and the surface of the silicon dioxide is coated with the polydopamine and the silane coupling agent. The powder coating provided by the invention has the characteristics of high adhesive force and excellent aging resistance, boiling resistance and corrosion resistance.

The invention discloses an anticorrosive coating composition based on a nano hybrid and a preparation method of the anticorrosive coating composition, and relates to the technical field of powder coatings. Comprising the following components in parts by weight: 60-70 parts of fluorosilicone modified epoxy resin, 8-10 parts of an aminoethylated acrylic polymer, 4-8 parts of a functionalized nano hybrid, 4-6 parts of a curing agent, 0.3-1.2 parts of an accelerant, 1-2 parts of benzoin, 2-4 parts of a functional aid, 10-15 parts of a micron-sized filler and 1-2 parts of a coupling agent. The curing agent is prepared by compounding dicyandiamide, bicyclo [2.2. 1] heptane dimethylamine and 3, 5-diamino-1, 2, 4-triazole according to a mass ratio of (3 to 5): 1: (0.8 to 1.2). The coating composition is high in adhesive force and excellent in impact resistance and corrosion resistance.

The invention relates to the field of powder coatings, in particular to a high-adhesion powder coating and a preparation method thereof.The high-adhesion powder coating is prepared from, by weight, 20-30 parts of epoxy resin, 20-30 parts of polyester resin, 3-5 parts of curing agent, 17-18 parts of filler, 2-4 parts of pigment, 0.5-2 parts of flatting agent and 0.5-2 parts of benzoin; the epoxy resin is at least one of triglycidyl p-aminophenol, sulfonic acid grafted modified epoxy resin and bisphenol A epoxy resin. The epoxy resin is used as a core film-forming substance, contains polar groups, and can form chemical bonding or physical adsorption with the surface of a metal substrate, so that the binding force of the coating and the metal substrate is remarkably improved; the polyester resin and the epoxy resin are compounded, so that the brittleness of the epoxy resin can be balanced, the toughness and cohesion of the powder coating are effectively improved, and the adhesive force of the powder coating on a metal base material is further enhanced, so that the powder coating with strong adhesive force is prepared.

The invention belongs to the technical field of powder coatings, and particularly relates to a high-wear-resistance and salt-fog-resistance epoxy powder coating and a preparation method thereof. The epoxy powder coating with high wear resistance and salt spray resistance is prepared from the following raw materials in parts by weight: 40 to 60 parts of modified epoxy resin, 15 to 30 parts of carboxyl-terminated polyester resin, 10 to 25 parts of fluorosilane modified composite filler, 10 to 25 parts of curing agent, 0.5 to 1 part of benzoin, 0 to 20 parts of pigment and 0.3 to 2 parts of other auxiliaries. The invention provides a high-wear-resistance and salt-fog-resistance epoxy powder coating and a preparation method thereof, which are used for solving the technical problems of poor hardness, weather resistance and salt fog resistance of the epoxy powder coating in the prior art.

The present invention relates to the field of coating preparation. Disclosed are a low-temperature curing thin-coat powder coating and a preparation method therefor. The powder coating comprises a resin, an accelerant, a curing agent, a dispersing agent, benzoin, barium sulfate, a leveling agent, a brightening agent, and a pigment as preparation raw materials, and the preparation raw materials of the resin comprise neopentyl glycol, ethylene glycol, 1,4-cyclohexanedimethanol, terephthalic acid, adipic acid, isophthalic acid, a catalyst, and an antioxidant. In the present application, by optimizing the preparation raw materials of the resin and the preparation raw material proportion, the branching degree and the terminal carboxyl activity of the resin are effectively improved, the reaction activity of the resin is ensured, the curing temperature of the powder coating is reduced, and excellent weather resistance and mechanical properties can also be obtained; moreover, the catalyst and the antioxidant are added in the resin preparation stage, thereby facilitating improvement of the storage stability, solving, taken as a whole, the problem of non-uniform dispersion of powder coatings, and facilitating improvement of the glossiness of the coating and the performance of the coating.

The invention relates to the technical field of traditional Chinese veterinary medicines, in particular to a veterinary antiviral traditional Chinese medicine composition and a preparation method thereof.The traditional Chinese medicine composition is prepared from, by weight, 20-40 parts of gypsum and 15-30 parts of rhizoma anemarrhenae; 15-30 parts of cornu bubali; 10-15 parts of manyleaf paris rhizome; 10-15 parts of radix paeoniae rubra; 10 to 15 parts of moutan bark; 10 to 15 parts of uncaria rhynchophylla; 0.3-1 part of calculus bovis factitius; 15 to 30 parts of magnet; 1-3 parts of benzoin; 10-15 parts of radix trichosanthis; and 10-15 parts of cape jasmine. The preparation method comprises the following steps: decocting the traditional Chinese medicines to prepare traditional Chinese medicine decoction, and concentrating overnight filtrate under reduced pressure to obtain traditional Chinese medicine fluid extract; and adding clinically acceptable auxiliary materials into the traditional Chinese medicine fluid extract, and preparing a clinically acceptable oral traditional Chinese medicine preparation by adopting a conventional preparation mode. The veterinary antiviral traditional Chinese medicine composition provided by the invention has a good treatment effect on viral diseases of livestock according to the principle of dialectical treatment of traditional Chinese veterinary medicines, can be used for replacing western medicines, and effectively avoids the problems of food safety and drug resistance caused by drug residues of the western medicines.

This invention belongs to the field of traditional Chinese medicine technology, specifically relating to a traditional Chinese medicine composition, its preparation method, and its uses. By mass parts, the raw materials of the traditional Chinese medicine composition include: 20-60 parts of Acorus calamus, 30-50 parts of Citrus aurantium, 20-60 parts of Benzoin, and 40-100 parts of Catechu. The traditional Chinese medicine composition of this invention has simple and natural components, and clear efficacy. It can effectively reduce the levels of XOD, SUA, CRE, BUN, TNF-α, IL-6, D-Lac, and DAO in the serum of a mouse model of gout, and significantly reduce the renal index, demonstrating good efficacy in treating hyperuricemia and / or gout.

A kind of ion gel sensor device with self-powered humidity sensing function and its preparation method belong to humidity sensor field, including the following steps: step 1. Di-vinyl benzene and tetra (3-mercapto propionic acid) pentaerythritol ester (PETMP) are added to methanol and tetrahydrofuran at room temperature to form a solution;Step 2. A certain amount of polyionic liquid and benzoin dimethyl ether are added to the solution;Step 3. A certain amount of solution is dropped on the interdigital electrode;Step 4. The gel solution on the interdigital electrode is treated by ultraviolet light;Step 5. After completion, it is packaged and stored. The pressure sensor device shows good sensitivity under different humidity, and has self-powered ability, and the element can be well used for the detection of breathing and other actions.

The present invention relates to the technical field of synthetic mica coatings, and specifically discloses an acid-corrosion-resistant insulating synthetic mica coating substrate and a preparation method thereof. The coating substrate comprises the following raw materials in parts by weight: 15 to 20 parts of synthetic mica powder, 8 to 14 parts of coupling-effect double-adjusting agents, 4 to 7 parts of nano-silicon carbide modifiers, 30 to 40 parts of epoxy resins, 6 to 9 parts of curing agents, 2 to 4 parts of polydimethylsiloxanes, and 0.5 to 1.0 parts of benzoin. The coating substrate of the present invention adopts synthetic mica powder and nano-silicon carbide modifiers. The synthetic mica powder has excellent acid-corrosion resistance and insulation. By blending epoxy resin, curing agent, polydimethylsiloxane, and benzoin, and then combining coupling-effect double-adjusting agents and nano-silicon carbide modifiers, the two are coordinated with each other to form the coating substrate raw material in coordination. The obtained product can achieve coordinated improvement of insulation, anti-fouling and self-cleaning performance, and the acid-corrosion resistance and stability of the product are remarkable.

The present invention relates to a MDF formaldehyde-free powder coating, which comprises the following components by weight: 50-70 parts of epoxy resin, 50-70 parts of polyester resin, 3-6 parts of curing accelerator, 2-10 parts of silicon-titanium self-cleaning agent, 10-40 parts of barium sulfate, 1-4 parts of leveling agent, and 1-4 parts of benzoin. The present invention also discloses a silicon-titanium self-cleaning agent and a preparation method for the MDF formaldehyde-free powder coating. The MDF formaldehyde-free powder coating disclosed by the present invention has low curing temperature, excellent formaldehyde removal effect, and also has a lasting formaldehyde removal effect.

The embodiment of the invention provides a method for preparing benzil by oxidizing benzoin, which comprises the following steps: S1, adding benzoin and a ferric ion solution into a reaction kettle, stirring and heating for reaction; s2, sampling and layering in the reaction process, observing the color of a water phase, introducing chlorine gas into the reaction kettle when the water phase is changed from brown yellow to green, and introducing the chlorine gas below the liquid level of the reaction liquid; s3, when yellow green gas overflows from tail gas, liquid phase detection is carried out, benzoin reaction is completed, and the reaction is stopped; s4, after standing, separating liquid to obtain a lower-layer water phase and an upper-layer organic phase; wherein the lower-layer water phase is an aqueous solution rich in ferric ions, and the upper-layer organic phase is the product benzil. According to the embodiment of the invention, at least the metabolite of the ferric ions, namely the ferrous ions, is changed into the ferric ions which can be recycled.

The invention discloses a fireproof insulating material and a preparation method thereof, and the fireproof insulating material comprises the following raw materials in percentage by weight: 20-30% of silicon resin, 20-30% of phenolic modified epoxy resin, 7.5-10% of an epoxy curing agent, 5-6% of an isophorone diisocyanate curing agent, 0.5-1% of a flatting agent, 0.2-0.5% of an electricity increasing agent type powdering aid, 0.3-0.5% of benzoin, 0.3-0.5% of an antioxidant and the balance of a solvent. 11.3-15% of a flame-retardant and fire-resistant functional auxiliary agent, and the balance of a pigment and a filler; the filler is a composition prepared from glass powder, mica powder, aluminum phosphate and wollastonite in a mass ratio of (8-10): (4-5): (2.6-3): (4-4.5). Through the mode, when the fireproof insulating material is used, the surface of a protected workpiece is coated with the powder, a protective coating is formed after baking and curing, and the curing conditions are 230 DEG C and 30 min; the protective coating has good initial insulation performance, still has good insulation effect after being burned in open fire at 1300 DEG C for 30 min, and can pass insulation performance tests after the initial coating and open fire burning: alternating voltage AC is 3000V, test duration is 60s, and current is less than 1mA.

The invention relates to the technical field of animal medicines, and particularly discloses a veterinary medicine compound preparation as well as a preparation method and application thereof. The veterinary medicine compound preparation is prepared by boiling, extracting, concentrating and diluting eight Tibetan medicines including aconitum pendulum, fructus chebulae, radix inulae inula, benzoin, pterocephalus hookeri, lagotis lagotis, amomum tsao-ko and rhodiola rosea. The veterinary drug compound preparation provided by the invention has an antibacterial range of 8.67 mm to 23.77 mm on enterotoxic large intestine dried bacteria, salmonella enteritidis and pasteurella multocida, and has an inhibition rate of 60% to 72% on enterotoxigenic escherichia coli diarrhea, salmonella enteritidis diarrhea and pasteurella multocida diarrhea; therefore, the veterinary drug compound preparation provided by the invention has a remarkable inhibition effect on enterotoxic large intestine dry bacteria, salmonella enteritidis and pasteurella multocida.

The invention discloses a method for preparing phenytoin sodium, which comprises the following steps: sequentially adding benzoin and ferric trichloride into an aqueous solution of alcohol, stirring and heating to reflux, cooling and filtering to obtain a phenytoin sodium intermediate 1; carrying out reflux reaction on the intermediate 1 and urea under alkaline conditions, adding purified water, filtering to remove impurities, neutralizing filtrate with hydrochloric acid, crystallizing and filtering to obtain phenytoin; sequentially adding phenytoin, sodium hydroxide and a low-boiling-point solvent, carrying out heating reflux reaction, cooling to room temperature after the reaction is ended, filtering, and drying to constant weight in a nitrogen-vacuum system at room temperature to obtain phenytoin sodium; the method has the beneficial effects that ferric trichloride is used as an oxidizing agent, so that the method is energy-saving and environment-friendly, and the prepared intermediate 1 has few impurities; the finished product is prepared only by using a volatile solvent, is easy to remove and does not need to be dried by a drying oven, nitrogen-vacuum is used for drying at room temperature, the energy consumption is low, no high-temperature destroyed impurities are generated, the impurities are few, and the purity is high; the method has the advantages of cheap and easily available raw materials, simple operation and few three wastes.

The invention belongs to the technical field of organic synthesis, and particularly discloses a method for preparing benzil through air oxidation of benzoin under the action of catalytic amount of Prussian blue, which comprises the following steps: sequentially adding benzoin, Prussian blue, inorganic alkali, ethanol and water into a reactor, stirring and reacting for 10-60 minutes in air, filtering, washing and drying to obtain the benzil. After the reaction is completed, filtering, extracting and separating to obtain an organic phase, and drying and concentrating the organic phase to obtain a finished product benzil. According to the invention, benzoin is taken as a raw material, prussian blue is taken as an additive to reduce the occurrence of excessive oxidation reaction, and benzil is rapidly synthesized; the synthesis method disclosed by the invention is green and environment-friendly, simple in reaction operation, free of additional separation and purification steps of products, high in reaction speed, obviously improved in reaction yield, low in environmental pollution, capable of effectively reducing the reaction cost and easy to popularize and use, and air is used as an oxidizing agent, alcohol is used as a solvent, and a catalytic amount of Prussian blue is used.

Biomass derived benzoin derivatives, and methods of making and using the same, are described. Benzoin derivatives may be used as visible light photoinitiators.

The invention relates to the technical field of coatings, and discloses an anti-corrosion and oil-stain-resistant aluminum profile color-changing low-carbon coating and a spraying process thereof, and the anti-corrosion and oil-stain-resistant aluminum profile color-changing low-carbon coating is prepared from the following components: fluororesin, surface grafted silicon carbide, alkyd resin, inorganic filler, benzoin, a flatting agent, precipitated barium sulfate, pigment filler, titanium dioxide and a brightener. The anti-corrosion and oil-stain-resistant aluminum profile color-changing low-carbon coating prepared by the invention is a powder coating, and volatile organic compounds (VOC) are not added in the coating preparation process, so that volatile pollution to the environment is not generated in the curing process after the coating is sprayed, the coating is low-carbon and environment-friendly, and meanwhile, the anti-corrosion and oil-stain-resistant aluminum profile color-changing low-carbon coating can be applied to the aluminum profile. The paint can form a uniform and compact coating on the surface of the aluminum profile, and can better provide protection for the aluminum profile.

The invention belongs to the technical field of coatings, and particularly relates to an epoxy anti-corrosion primer powder coating which comprises raw materials. The raw materials comprise the following components in parts by weight: 300 to 480 parts of epoxy resin, 280 to 300 parts of polyester resin, 100 to 140 parts of a phenolic aldehyde curing agent, 8 to 12 parts of a flatting agent, 1 to 5 parts of benzoin, 3 to 7 parts of a brightener, 1 to 5 parts of PE wax, 0.3 to 0.7 part of dimethylmizole, 18 to 22 parts of an adhesion promoter, 38 to 42 parts of zinc phosphate, 38 to 42 parts of zinc powder, 90 to 110 parts of titanium dioxide, 3 to 7 parts of pigment and 160 to 260 parts of barium sulfate. The adhesive force of the epoxy anti-corrosion base powder coating is greatly improved, and then the phenomenon of falling can be avoided.

The present invention discloses a pH-responsive nanocomplex, a preparation method thereof and applications, belonging to the technical field of biomedicine. The preparation method of the pH-responsive nanocomplex disclosed by the present invention includes: S1. Using N-(2-hydroxyethyl) acrylamide, PPTS and allyl vinyl ether as raw materials to react to generate AEEAA; S2. Reacting PAMAM with AEEAA to generate PAMAM-acetal-ene; S3. Reacting benzoin diethyl ether, cysteamine hydrochloride with PAMAM-acetal-ene to synthesize PAMAM-acetal-NH2; S4. Mixing and reacting PAMAM-acetal-NH2 with VDQACs in water to synthesize a pH-responsive nanocomplex. The present invention also discloses the pH-responsive nanocomplex prepared by this method and its application in the preparation of drugs for preventing and / or treating dental caries. The nanocomplex of the present invention releases the antibacterial drug VDQACs in response to pH changes to kill pathogenic bacteria; at the same time, the nanocomplex also has an unexpected remineralization induction function.

The invention relates to the technical field of burns and scalds, and discloses a formula of a composite traditional Chinese medicine pigmentum for repairing skin wounds caused by burns and scalds and a production process of an abelmoschus manihot flower oil solution matched with an elm and fragrant herbal powder formula. The powder part is prepared from the following raw materials in percentage by mass: 45 to 51 percent of radix sanguisorbae, 30 to 41 percent of goat manure, 3 to 4.6 percent of benzoin and 1 to 2.3 percent of borneol; the oiling agent part comprises the following raw materials in percentage by mass: 17% of abelmoschus manihot flowers and 83% of edible soybean oil. A protective film is formed by the sanguisorba officinalis soybean oil to cover active nerve endings, so that external stimulation is reduced, and pain is relieved more effectively; the borneol benzoin abelmoschus manihot flower is used for coping with wound infection; sanguisorba officinalis capable of detoxifying and astringing sores, goat manure capable of astringing fester, removing slough and promoting tissue regeneration, borneol benzoin capable of promoting qi to activate blood and soybean oil capable of moistening dryness and promoting tissue regeneration are utilized, so that the wound surface is quickly healed; the problem is solved from the source of scars by utilizing goat manure for astringing ulceration, removing slough and promoting granulation.

The invention discloses a polyester type powder coating and a preparation method thereof, and belongs to the technical field of coating production, firstly, the polyester type powder coating is prepared from the following raw materials in parts by mass: 45 to 55 parts of film forming matter, 15 to 20 parts of curing agent, 5 to 15 parts of pigment, 10 to 15 parts of filler, 0.3 to 0.8 part of benzoin and 0.5 to 1.5 parts of antioxidant. Wherein the film forming substance is prepared by carrying out a self-polycondensation reaction on 2, 2-dimethylolpropionic acid under high-temperature catalysis and nitrogen protection; wherein the curing agent is prepared by the following steps: esterifying 2, 4-dihydroxybenzophenone and trimellitic anhydride in N, N-dimethylformamide, and catalyzing by ion exchange resin to obtain a carboxylic acid-containing intermediate; and carrying out ring-opening reaction with epoxy chloropropane, carrying out ring-closing reaction with NaOH, and introducing a glycidyl ester structure.