29 results about "Hydroxybenzotriazole" patented technology

The application discloses an antioxidant coating and a preparation method thereof, and relates to the technical field of coatings. The application first uses hydroxybenzotriazole to esterify and modify acrylic acid, and then uses the modified acrylic acid to prepare modified acrylic resin coating. The benzotriazole structure has high hardness and rigidity, and also has good ultraviolet absorption performance, which can reduce the degradation of the acrylic resin caused by ultraviolet rays and further improve the durability of the coating. The microcapsule wall material is modified by a hydrophobic compound, and then a new type of microcapsule wall material is prepared by coating an antioxidant. The microcapsule wall material modified by the hydrophobic compound can effectively prevent external moisture and oxygen from entering the microcapsule, improve the stability of the coating in a humid environment, and protect the antioxidant in the core material from the influence of the external environment. The antioxidant is slowly and continuously released in the coating, and the oxidation reaction of the coating is effectively inhibited for a long time. The antioxidant coating prepared by the application has the effects of wear resistance and durability.

The invention relates to a high-toughness anti-crack magnetic decorative film and a preparation method thereof. The decorative film is prepared from the following raw materials in parts by weight: 40 to 60 parts of poly (dihydrothiophene-vinyl ether) copolymer, 10 to 25 parts of shell layer self-assembly modified Fe3O4 nanosheets, 5 to 15 parts of polyether ester block elastomer, 0.5 to 2 parts of sodium dodecyl benzene sulfonate, 0.5 to 1.5 parts of fluorosilane coupling agent, 0.1 to 1.0 part of 2-hydroxybenzotriazole ultraviolet absorbent, 3 to 6 parts of bisphenol A type epoxy curing agent and 0.05 to 0.5 part of imidazole catalyst. The flexible copolymer is synthesized through copolymerization of dihydrothiophene and vinyl ether, the modified Fe3O4 nanosheets form a Fe3O4 structure through coprecipitation of ferric chloride and ferrous chloride and regulation and control of ammonia water, and shell self-assembly coating is carried out through tetraethoxysilane and a block micromolecule interface agent. The material has excellent tensile strength, elongation at break, magnetic adsorption force and cycling stability, and is suitable for the application fields of flexible magnetic films and high-adhesion decorations.

The present application relates to the technical field of paint, and discloses a preparation method of a spherical alumina-cordierite composite refractory paint composition, wherein 100 parts by weight of epoxy resin, 1-5 parts by weight of an amino-terminated polymer ultraviolet absorber, 15-28 parts by weight of a filler spherical alumina trihydrate and cordierite, 29-32 parts by weight of a curing agent and the like are stirred and uniformly mixed to obtain the spherical alumina-cordierite composite refractory paint composition.The polymer ultraviolet absorber contains an ortho-hydroxybenzotriazole group, which can improve the ultraviolet absorption characteristics and ultraviolet aging resistance of the paint.The polymer, as an absorber, contains a biphenyl structure with thermal stability, which is beneficial to improving the thermal decomposition temperature, heat resistance and water resistance after being co-cured with the epoxy resin.The addition of the spherical alumina trihydrate and cordierite improves the limiting oxygen index of the paint coating and improves the flame-retardant fire resistance.

The application provides a high-transparency silicone rubber material and a preparation method thereof. The silicone rubber material comprises the following raw materials in parts by mass: 100 parts of methyl vinyl phenyl rubber, 10-30 parts of modified white carbon black, 3-5 parts of vinyl MQ silicone resin, 4-6 parts of polymethyl hydrogen siloxane, 1-1.5 parts of vinyl hydroxyl silicone oil and 0.001-0.003 parts of platinum catalyst. The modified white carbon black is obtained by grafting benzotriazole silane coupling agent and silicone oil onto the modified white carbon black. The benzotriazole silane coupling agent is obtained by urethane reaction of hydroxy benzotriazole compound and isocyanate silane coupling agent. The silicone oil grafting silane coupling agent is obtained by addition reaction of hydrogen-terminated polydimethylsiloxane and vinyl silane coupling agent. The silicone rubber material has good transparency and light stability.

The invention discloses a copper-titanium etching solution, and relates to the technical field of microelectronic device manufacturing, and the copper-titanium etching solution comprises the following components by mass: 4.5-8.5% of ammonium persulfate; 1.5%-3.5% of urea peroxide; 1.0% to 2.0% of 1-hydroxybenzotriazole-5-carboxylic acid; 0.3% to 0.9% of 2-mercapto benzimidazole; 0.5% to 1.5% of sulfobutyl ether-beta-cyclodextrin; 0.8%-2.2% of L-aspartic acid-N, N-diacetic acid; 0.1% to 0.7% of iso-tridecanol polyoxyethylene ether; 0.05%-0.15% of ceric ammonium nitrate; 0.02% to 0.08% of sodium polyacrylate; and the balance of deionized water. According to the method, the matching problem of the etching rate is solved, the stability is improved, and substrate corrosion is avoided.

The application discloses modified cotton fabric and a preparation method and application thereof, and relates to the field of textile fabrics.In the preparation of the modified cotton fabric, chitosan is pretreated by 2-bromoisobutyryl bromide, then acrylic acid and methyl acrylate are grafted and polymerized by an atom transfer radical polymerization method to obtain pre-modified chitosan, then the pre-modified chitosan is sequentially reacted with oxalyl chloride and 4-hydroxybenzotriazole to prepare modified chitosan; cotton fabric is ultrasonically pretreated by a sodium dodecyl sulfate solution, then sequentially reacts with 6-chlorohexanoyl chloride and N,N-dimethylallylamine to prepare pre-modified cotton fabric, and finally, the pre-modified cotton fabric is reacted with a modified liquid prepared from modified chitosan, dimethyl phosphite and 1,4-butanediol to prepare the modified cotton fabric.The modified cotton fabric prepared by the application has excellent ultraviolet resistance, antibacterial property, wrinkle resistance and flame retardance.

The invention belongs to the field of chemical analysis and testing, and particularly relates to a quinoline derivative coumarin fluorescent probe targeting tobramycin and a preparation method of the quinoline derivative coumarin fluorescent probe. The preparation method comprises the following steps: dissolving N1-(7-chloroquinoline-4-yl) ethane-1, 2-diamine and 7-(diethylamino) coumarin-3-formic acid in dichloromethane, adding condensing agents of 1-hydroxybenzotriazole (HOBT), 1-ethyl-(3-dimethylamino aldehyde) carbodiimide hydrochloride (EDCI) and triethylamine, carrying out a stirring reaction at room temperature, carrying out separation and purification on an obtained crude product through silica gel column chromatography, and carrying out recrystallization to obtain the 7-(diethylamino) coumarin-3-carboxylic acid-N-(7-chloroquinoline-4-yl) coumarin-3-carboxylic acid-N-(7-chloroquinoline-4-yl) coumarin-3-carboxylic acid-N-(7-chloroquinoline-4-yl) coumarin-3-carboxylic acid. The coumarin fluorescent probe DL containing the quinoline derivatives is obtained. The prepared coumarin fluorescent probe forms a complex under the participation of Cu < 2 + >, and tobramycin can be specifically and rapidly detected in deionized water.

The present invention relates to a method for preparing a modified hydrophobic excipient including the following steps: Step A. obtaining intermediate I or II from a hydrophobic natural compound with one to three hydroxyl groups or a hydrophobic synthetic compound with one to three hydroxyl groups and amino acid derivatives with amino protecting groups and different chain lengths acting as raw material; Step B. obtain intermediate III from an amino acid derivative and N-hydroxysuccinimide or 1-hydroxybenzotriazole acting as raw material and a dehydrating agent; and Step C. reacting the intermediate II and the intermediate III as raw material with an acid-binding agent under a dark condition to generate a modified hydrophobic excipient.

The invention provides an antibacterial and anti-mineralization material for softening dental calculus and inhibiting formation of dental calculus, a preparation method of the antibacterial and anti-mineralization material comprises the following steps: dissolving chitosan and / or carboxymethyl chitosan and 1-hydroxybenzotriazole in deionized water under a stirring condition to obtain a solution A; under the stirring condition, an organic additive solution and a 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride solution are dropwise added into the solution A obtained in the step 1), and a solution B is obtained; performing low-temperature dialysis on the solution B obtained in the step 2), and performing freeze drying to obtain a product C; under the stirring condition, adding the product C and lysozyme into deionized water, and reacting to obtain the antibacterial and anti-mineralization material for softening dental calculus and inhibiting formation of dental calculus. The material disclosed by the invention can be combined with the surface of residual dental calculus after periodontal basic treatment, surface plaque biofilm is removed, and rapid mineralization of the material is inhibited by combining calcium ions, cell colonization is promoted, and periodontal tissue recovery is promoted.

The invention relates to a photo-initiated synthetic aminophenol compound method and application, and belongs to the technical field of organic synthesis. The synthesis method comprises the following steps: deprotonating a 1-hydroxybenzotriazole compound under an alkaline condition, and carrying out cracking reaction under the excitation of visible light to generate a high-activity biradical intermediate which is unstable and can be rapidly tautomerized into a more stable nitrosobenzene anion intermediate; the intermediate further reacts with cyclohexenone substances to synthesize the aminophenol derivative in one step. The method is simple and efficient, simple and convenient to operate, free of transition metal and additional oxidizing agents, simple and easily available in raw material reagent, high in product yield and capable of realizing large-scale synthesis, and a new method is provided for rapidly synthesizing the aminophenol compound. The synthesized aminophenol compound has good antibacterial activity, and especially has huge potential in the aspect of preventing and treating anthracnose of tea trees.

The invention belongs to the field of chemical synthesis, and particularly relates to a deprotection reagent, a kit and application of the deprotection reagent and the kit. And an organic base. According to the deprotection reagent, organic unification of mild and efficient deprotection and key side reaction inhibition is achieved through the synergistic effect of the 1-hydroxybenzotriazole and the organic base, specifically, the 1-hydroxybenzotriazole can effectively inhibit amino acid racemization, and more importantly, by capturing a beta-elimination reaction intermediate, the deprotection efficiency of the deprotection reagent is improved. And a protection mechanism aiming at phosphorylated amino acid is constructed together with organic alkali, so that a solid foundation is laid for preparing complex phosphorylated protein / polypeptide with high purity and accurate structure.

The preparation method comprises the following steps: by taking 3, 4-dihydroxyphenylacetic acid and 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide as raw materials, carrying out pre-activation reaction in an organic solvent, and adding 1-hydroxybenzotriazole to carry out activation reaction, so as to obtain a reaction product; slowly adding the reaction product into a protamine buffer solution, carrying out amidation coupling reaction, and purifying and drying to obtain the protamine-DOPAC conjugate. According to the protamine-DOPAC conjugate, the residence time of the exosome in a uterine cavity can be prolonged, and the action efficiency of the exosome in an endometrium can be improved. The protamine-DOPAC conjugate provided by the invention has an application prospect in the drug delivery direction.

The invention relates to the technical field of high polymer materials, in particular to a high-strength weather-resistant composite material, a preparation method and application of the high-strength weather-resistant composite material to protection of wind power generation equipment. The preparation method of the high-strength weather-resistant composite material comprises the following steps: reacting N-hydroxybenzotriazole with cyanuric chloride to prepare an intermediate A; reacting the intermediate A with biphenyl-4, 4 '-dithiol to obtain an intermediate B; and reacting the intermediate B with 4, 4 '-di [2-(1-propenyl) phenoxy] benzophenone to prepare the composite ultraviolet light absorber. Carrying out grafting reaction on the composite ultraviolet light absorber and POE (Polyolefin Elastomer) under the action of an initiator to prepare a composite modifier; the composite modifier and PA66 are subjected to melt blending, extrusion, cooling and grain-sized dicing, and the composite material is prepared. The composite material is high in strength, strong in ultraviolet aging resistance and good in weather resistance and low temperature resistance.

The invention provides an extracting agent for efficiently separating and extracting scandium and a preparation method thereof, and relates to the field of solvent extraction. The preparation method comprises the following steps: mixing DMF (Dimethyl Formamide), an aminopolycarboxylic acid chelating agent, triethylamine and 1-hydroxybenzotriazole in proportion under an ice salt bath condition, uniformly stirring, adding 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide hydrochloride in batches for activation, then adding aliphatic secondary amine, heating, and reacting for 20-30 hours to obtain a reaction solution; after the reaction liquid is cooled, suction filtration is performed, deionized water is added, and ethyl acetate is adopted for extraction; then washing, drying and carrying out rotary evaporation to obtain an oily substance; adding petroleum ether into the oily substance, heating and stirring, cooling, removing impurities, and eluting to obtain the extracting agent. The extracting agent prepared by the method only contains four elements of C, H, O and N, meets the standard of an environment-friendly green extracting agent, not only can realize efficient extraction of scandium ions in a wider acidity range, but also has environment-friendly performance, and has good economic value.

The application discloses a kind of peroxidase / laccase-like nanoscale enzyme colorimetric / fluorescence dual-mode rapid detection sodium dehydroacetate method, the method with 1-hydroxybenzotriazole (HOBT) as organic ligand, select Cu and Zn two transition metals as central ion, Cu / Zn-MOF material is synthesized.The linear range of colorimetric mode is 0.067-12 μg / mL, and the detection limit is 0.020 μg / mL;The linear range of fluorescence mode is 0.01-22 μg / mL, and the detection limit is 0.041 μg / mL, the sensor is applied to the recovery experiment of DHA in food sample, the recovery rate is between 92.1%~106.4%, and RSD is not more than 5%, verify that the analysis method has good stability, reliability and reproducibility.

The invention discloses a peroxidase-like / laccase nano-enzyme colorimetric / fluorescent dual-mode rapid sodium dehydroacetate detection method, which comprises the following steps: synthesizing a Cu / Zn-MOF material by taking 1-hydroxybenzotriazole (HOBT) as an organic ligand and selecting two transition metals Cu and Zn as central ions; the linear range of the colorimetric mode is 0.067-12 [mu] g / mL, and the detection limit is 0.020 [mu] g / mL; the linear range of a fluorescence mode is 0.01-22 [mu] g / mL, the detection limit is 0.041 [mu] g / mL, the sensor is applied to a standard recovery experiment of DHA in a food sample, the recovery rate is 92.1-106.4%, the RSD does not exceed 5%, and it is verified that the analysis method has good stability, reliability and reproducibility.

The invention discloses [1] rotaxane molecular compounds and a synthetic method thereof, and the synthetic method comprises the following steps: under the protection of inert atmosphere, carrying out nucleophilic substitution reaction on a compound A, sodium hydride and ethyl bromoacetate in N, N-dimethylformamide to obtain a compound B; performing nucleophilic substitution reaction with pyridine and trifluoromethanesulfonic anhydride to obtain a compound C; then carrying out a coupling substitution reaction with a compound D, bis (triphenylphosphine) palladium dichloride and 2-dicyclohexylphosphine-2 ', 4', 6 '-triisopropyl biphenyl to obtain a compound E; performing hydrolysis reaction with sodium hydroxide to obtain a compound F; under the protection of inert atmosphere, carrying out nucleophilic substitution reaction on the compound G, the compound H and potassium carbonate in N, N-dimethylformamide to obtain a compound I; performing hydrazinolysis reaction on the compound I and hydrazine hydrate to obtain a compound J; and under the protection of inert atmosphere, carrying out condensation reaction on the compound J, a compound F, 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide hydrochloride and 1-hydroxybenzotriazole to obtain the [1] rotaxane molecular compound.

This invention belongs to the field of amino acid derivative preparation technology, and relates to a method for preparing biotinylated amino acid derivatives. The method involves adding amino acids and a base to biotin D-biotin, stirring, then adding a catalyst and a solvent, stirring the reaction, drying the solvent, extracting, and purifying to obtain the biotinylated amino acid derivative. The catalyst is 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide and 1-hydroxybenzotriazole. This invention does not require metal catalysis or highly active acyl chlorides. Under the action of a base, the amino acidification of biotin D-biotin is achieved under mild conditions. This method is simple to operate, has mild reaction conditions, a wide range of applicable substrates, inexpensive and readily available raw materials, high product selectivity, and broad market prospects.

The present invention relates to a photovoltaic element, comprising a front layer, a back layer, and a plurality of photovoltaic cells, which photovoltaic cells are present between the front layer and back layer, wherein the front layer consists of a polypropylene composition, comprising: a) a random polypropylene resin; b) a mixture of light stabilizing additives; said mixture comprising: i) a high molecular weight hindered tertiary amine light stabilizer (t-HM-HAL S) having a weight average molecular weight of at least 1600 g / mol; ii) a low molecular weight hindered secondary amine light stabilizer (s-LM-HALS) having a weight average molecular weight of below 1000 g / mol; iii) an ultraviolet synergist, being a n-alkyl-3,5-dialkylated 4-hydroxybenzoate; iv) an ultraviolet absorber, being a hydroxybenzotriazole compound or a hydroxyl benzophenone compound or a mixture thereof; c) a mixture of antioxidant additives; said mixture comprising: i) a phenolic antioxidant; and ii) a phosphite additive. The invention also relates to a polypropylene composition and to the use thereof as front layer.

The invention discloses a preparation method of an anti-oxidation coating, and relates to the technical field of coatings. Hydroxybenzotriazole is firstly used for esterifying modified acrylic acid, then the modified acrylic acid is used for preparing the modified acrylic resin coating, a benzotriazole structure has high hardness and rigidity and also has good ultraviolet absorption performance, the degradation effect of ultraviolet rays on acrylic resin can be reduced, the durability of the coating is further improved, and the service life of the coating is prolonged. The novel microcapsule wall material is prepared by modifying the microcapsule wall material with the hydrophobic compound and then coating the microcapsule wall material with the antioxidant, and the microcapsule wall material modified with the hydrophobic compound can effectively prevent external moisture and oxygen from entering the interior of the microcapsule, so that the stability of the coating in a humid environment is improved; and the coating of the microcapsule protects the core material antioxidant from being influenced by the external environment, the antioxidant is slowly and continuously released in the coating, and the oxidation reaction of the coating is effectively inhibited for a long time. The anti-oxidation coating prepared by the invention has the effects of wear resistance and durability.

The application belongs to the technical field of beer brewing, and particularly relates to a beer silica gel clarifier and a preparation method and application thereof. The preparation method of the beer silica gel clarifier comprises the following steps: preparing a sol: first, adding a hydroxyl protecting agent into a sodium silicate solution; then, adding a raw material sulfuric acid solution into the sodium silicate solution to perform a reaction; when the reaction is performed to 2%-20% of the total reaction time, adding a catalyst; when the reaction is performed to 25%-50% of the total reaction time, adding N-hydroxybenzotriazole; after the reaction is completed, the sol is prepared; preparing a gel: after the obtained sol is aged and alkali-bubbled, the gel is prepared by washing; preparing the beer silica gel clarifier: after the prepared gel is dried and activated, the beer silica gel clarifier is obtained. The preparation method can finely control the pore diameter of the silica gel, and the prepared silica gel clarifier can realize high-selective adsorption of turbidity-sensitive proteins.

The invention provides a high-selectivity Ag-Al composite etching liquid composition, and relates to the technical field of metal film layer etching. The high-selectivity Ag-Al composite etching liquid composition is prepared from phosphoric acid, sulfuric acid, potassium hydrogen sulfate, ammonium sulfate, 1-hydroxybenzotriazole, 3-amino-1, 2, 4-triazole, dimethyl dithiophosphate and organic alcohol. The defects in the prior art are overcome, Al can be effectively etched, meanwhile, Ag is hardly corroded, and the problem that Ag is excessively etched in a traditional technology is effectively solved.

The invention discloses a migration-resistant red dye and a preparation method and application thereof.The preparation method comprises the steps that solvent red 195 serves as a monomer raw material and is mixed with methyl alcohol, tetrahydrofuran and a sodium hydroxide aqueous solution to react, a hydrolysate is obtained, then the hydrolysate is acidified, and a carboxylic acid product is obtained; the preparation method comprises the following steps: mixing a carboxylic acid product with ethylene glycol amine, 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride, 1-hydroxybenzotriazole, N, N-diisopropylethylamine and dichloromethane to obtain a diethanol amine substituted product, and finally mixing the diethanol amine substituted product with toluene-2, 4-diisocyanate and DMF (Dimethyl Formamide) to react to obtain the migration-resistant red dye. The macromolecular dye polymer is prepared, migration of dye molecules in a high polymer material is reduced, and the macromolecular dye polymer has higher stability, temperature resistance and migration resistance.

The invention discloses a shiitake mushroom source manganese peroxidase LeMnP1 as well as a coding gene and application thereof, and relates to the technical field of enzyme preparations, and the amino acid sequence of the shiitake mushroom source manganese peroxidase LeMnP1 is as shown in SEQ ID NO. 2. The enzyme has high thermal stability and good pH adaptability, shows the highest activity at 40 DEG C and pH 3, and maintains the relative activity of 81% or above at 30-90 DEG C, or maintains the relative activity of 58% or above at pH 2-5. Manganese peroxidase LeMnP1 has efficient degradation capacity on synthetic dyes, 1-hydroxybenzotriazole has a remarkable promotion effect on the degradation capacity of the manganese peroxidase LeMnP1, and the manganese peroxidase LeMnP1 is applied to degradation of the synthetic dyes, is efficient and environmentally friendly and has great popularization potential.

The present application belongs to the field of chemical analysis test, and particularly relates to a coumarin fluorescent probe based on aminobenzaldehyde for preparing a reagent for detecting mercaptosuccinic acid and a preparation method. 2-Aminobenzaldehyde and 7-(diethylamino)coumarin-3-carboxylic acid are dissolved in dichloromethane, 1-ethyl-(3-dimethylaminoaldehyde) carbonyldiimidazole hydrochloride (EDCI) and 1-hydroxybenzotriazole (HBOT) are added as condensing agents, and the reaction is stirred at room temperature. The obtained crude product is separated and purified by thin layer chromatography to obtain the final yellow product, the coumarin fluorescent probe Y-SH based on aminobenzaldehyde. The coumarin fluorescent probe prepared by the present application can rapidly detect mercaptosuccinic acid in deionized water.

This invention relates to a photo-initiated method for synthesizing asymmetric azo aromatic compounds and its applications, belonging to the field of organic synthesis technology. A 1-hydroxybenzotriazole compound is deprotonated under alkaline conditions and then undergoes a cleavage reaction under visible light excitation to generate a highly reactive diradical intermediate. This intermediate is unstable and rapidly tautomerizes to a more stable nitrosophenyl anion intermediate. Under aprotic polar solvent conditions, this highly reactive intermediate is proton-quenched to obtain a highly reactive nitrosobenzene intermediate, which subsequently polymerizes with aniline compounds to generate asymmetric azo aromatic compounds. The raw materials are readily available, the synthetic route is short, the process is simple, and the products are easily separated and purified, making it suitable for large-scale synthesis. This provides a new route for the rapid preparation of asymmetric azo aromatic compounds. The synthesized asymmetric azo aromatic compounds exhibit good antibacterial activity and have significant application potential in the control of anthracnose in tea trees.

The invention provides a high-transparency silicone rubber material and a preparation method thereof. The silicone rubber material is prepared from the following raw materials in parts by mass: 100 parts of methyl vinyl phenyl rubber, 10-30 parts of modified white carbon black, 3-5 parts of vinyl MQ silicon resin, 4-6 parts of polymethylhydrosiloxane, 1-1.5 parts of vinyl hydroxyl silicone oil and 0.001-0.003 part of a platinum catalyst. Wherein the modified white carbon black is obtained by modifying white carbon black through a benzotriazole silane coupling agent and a silicone oil grafted silane coupling agent; the benzotriazole silane coupling agent is obtained by carrying out carbamate reaction on a hydroxyl benzotriazole compound and an isocyanate silane coupling agent; the silicone oil grafted silane coupling agent is obtained by carrying out addition reaction on hydrogen-terminated polydimethylsiloxane and a vinyl silane coupling agent. The silicone rubber material has good transparency and light stability.

The invention belongs to the technical field of polycarbonate plates, and particularly relates to a preparation method of an uvioresistant UV (ultraviolet) master batch for a polycarbonate plate, which comprises the following steps: 1, carrying out acid anhydride alcoholysis reaction on 5-hydroxybenzotriazole and maleic anhydride to obtain an ultraviolet light absorber; step 2, carrying out an amidation reaction on an ultraviolet light absorber and 3-aminopropyltriethoxysilane, so as to obtain anti-ultraviolet silane; 3, carrying out a Michael addition reaction on the anti-ultraviolet silane and the amino-terminated poly (epsilon-caprolactone) to obtain an anti-ultraviolet UV master batch; the uvioresistant UV master batch provided by the invention not only solves the traditional contradiction that uvioresistant and mechanical properties are difficult to consider when a polycarbonate plate is used outdoors, but also fundamentally solves the bottleneck problems of non-uniform dispersion of auxiliaries, weak interface, easy migration and precipitation and the like in traditional physical blending.

The invention belongs to the technical field of organic synthesis, and discloses a vitamin A palmitate synthesis method, which comprises: carrying out a condensation reaction on retinol and palmitic acid according to a ratio under the combined action of a dehydrating agent and a nucleophilic catalyst at a condensation reaction temperature of 0-70 DEG C; the dehydrating agent is selected from dicyclohexylcarbodiimide, 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride, 1-hydroxybenzotriazole or 2-(7-azabenzotriazole)-N, N, N ', N'-tetramethylurea hexafluorophosphate, and the solvent is selected from the group consisting of a solvent, a solvent and a solvent; the nucleophilic catalyst is selected from triethylamine, diisopropylethylamine, imidazole, 4-dimethylaminopyridine or 1, 8-diazabicyclo undec-7-ene, and the catalyst is one or more selected from the group consisting of 1, 8-diazabicyclo undec-7-ene. The method is simple to operate, mild in reaction condition, high in product yield and purity and suitable for industrial production.