626 results about "Acetic Acid Esters" patented technology

Disclosed herein are “ketone body-HMB” or “KB-HMB” compositions including a combination of: (1) hydroxymethyl butyrate; (2) a ketone body component such as beta-hydroxybutyrate (BHB) and / or acetoacetate; and (3) optionally a dietetically or pharmaceutically acceptable carrier. Also disclosed herein are methods of using such compositions for producing desired physiological effects, such as fat loss, in a mammal. The compositions beneficially enhance fat loss through ketosis while also reducing or eliminating muscle wasting and / or promoting muscle formation.

The invention discloses a synthesis method of 2-bromomethyl-5-trifluoromethyl furan, which comprises the following steps: S1, carrying out reaction on acetoacetate and halogenated trifluoroacetone under the action of an alkaline substance and a catalyst to generate a 2-acetyl-5, 5, 5-trifluoro-4-oxovalerate crude product; s2, carrying out a cyclization reaction on the 2-acetyl-5, 5, 5-trifluoro-4-oxovalerate crude product, so as to obtain a 2-methyl-5-(trifluoromethyl) furan-3-formate crude product, and carrying out a cyclization reaction on the 2-acetyl-5, 5, 5-trifluoro-4-oxovalerate crude product to obtain a 2-methyl-5-(trifluoromethyl) furan-3-formate crude product; s3, adding an alkaline substance into the crude product, carrying out hydrolysis, and adding acid to adjust the pH value after the hydrolysis is completed, so as to obtain 2-methyl-5-(trifluoromethyl) furan-3-formic acid; s4, the 2-methyl-5-(trifluoromethyl) furan-3-formic acid is subjected to a heating decarboxylation reaction, and 2-methyl-5-(trifluoromethyl) furan is obtained; and S5, carrying out a bromination reaction on the 2-methyl-5-(trifluoromethyl) furan and a bromination reagent to obtain a final product 2-bromomethyl-5-(trifluoromethyl) furan. The raw materials used in the synthesis method are easy to obtain, use of control chemicals is not involved, and industrialization is easy to achieve.

The invention discloses a whitening nano-emulsion and a preparation method thereof, and relates to the technical field of cosmetics and skin care products. The whitening nano-emulsion is prepared from the following components in percentage by weight: 2.0 to 10.0 percent of an emulsifying agent, 4.0 to 10.0 percent of an emollient, 3.0 to 8.0 percent of glycerol, 3.0 to 8.0 percent of butanediol, 0.5 to 3.0 percent of nicotinamide, 1.0 to 3.0 percent of a Soulixian extract, 0.5 to 3.0 percent of ascorbyl tetraisopalmitate, 0.3 to 3.0 percent of hydrogenated lecithin, 0.1 to 2.0 percent of hydroxyethyl piperazine ethanesulfonic acid, 0.1 to 1.0 percent of SymSitive1609, 0.03 to 0.5 percent of a mulberry root extract, 0.03 to 1.0 percent of cerium oxide and the balance of water. The toothpaste is prepared from the following components in percentage by weight: 0.05 to 0.5 percent of tocopheryl acetate, 0.03 to 0.3 percent of stearyl glycyrrhetinic acid ester, 0.01 to 0.1 percent of poly gamma-sodium glutamate, 0.03 to 0.2 percent of EDTA (Ethylene Diamine Tetraacetic Acid) disodium, 0.2 to 1.0 percent of preservative, 0.01 to 0.1 percent of aromatic and the balance of water, wherein the total The prepared whitening nano-emulsion can solve the problems of excessive addition, difficult absorption and instability of active ingredients of cosmetics, can inhibit DPPH free radical activity, hydroxyl free radical activity and tyrosinase activity through the synergistic effect of all the components, achieves the effects of resisting oxidation, whitening, removing freckles, brightening skin and the like, and does not cause damage to the skin.

The invention discloses a process method for preparing a fluopyram key intermediate. The key intermediate is [3-chloro-5-(trifluoromethyl) pyridine-2-yl] ({[2-(trifluoromethyl) benzoyl] amino} methyl) dimethyl malonate, and the process method comprises the following steps: in the presence of a solvent 1, carrying out a reaction on a compound 2-[3-chloro-5-(trifluoromethyl) pyridyl] dimethyl malonate potassium salt and a compound 1-D in a reaction container, and distilling and recovering the solvent 1 to obtain the intermediate compound. Wherein the solvent 1 is selected from acetic ester solvents with the boiling point range of 40-110 DEG C at normal temperature and normal pressure. The process method is simple and convenient, the total yield is high, the solvent is easy to recover, and the product purity is high; the intermediate does not need purification post-treatment, can be directly used for synthesis of fluopyram, can be amplified, and is beneficial to cost reduction, efficiency improvement and commercial mass production.

Compositions for delivering ketone bodies to a subject include one or more beta-hydroxybutyrate salts, one or more acetoacetate salts, beta-hydroxybutyric acid, and optionally acetoacetic acid. The compositions may optionally include one or more ketone body esters, such as one or more beta-hydroxybutyrate esters and / or one or more acetoacetate esters. An example composition contains about 2% to about 98% on a molar basis of the one or more beta-hydroxybutyrate salts and the one or more acetoacetate salts, about 2% to about 98% on a molar basis of the beta-hydroxybutyrate free acid and optionally the acetoacetate free acid, and optionally about 2% to about 98% on a molar basis of one or more ketone body esters.

The invention discloses a process method for preparing fluopyram. The process method comprises the following steps: in the presence of a solvent 1, reacting a compound 2-[3-chloro-5-(trifluoromethyl) pyridyl] dimethyl malonate potassium salt with a compound 1-D in a reaction container to obtain an intermediate compound, and distilling to recover the solvent 1 without purification treatment of the intermediate compound; adding water, alkali and a solvent 2 into the reaction container for reaction; adjusting the pH value after the reaction, and continuing the reaction; and after the reaction is finished, carrying out post-treatment to obtain the product fluopyram. Wherein the solvent 1 is selected from acetic ester solvents with the boiling point range of 40-110 DEG C at normal temperature and normal pressure. The process method is simple, convenient, high in total yield, low in cost and stable and qualified in product quality, fluopyram is prepared through a one-pot method, production equipment is reduced, investment is reduced, cost is reduced, efficiency is improved, and commercialized mass production is facilitated.

The invention relates to a method for constructing a C-N bond or a C-C bond through an insertion reaction of oxygen-sulfur ylide and aromatic amine. According to the method, tris (pentafluorophenyl) borane is taken as a catalyst, oxygen-sulfur ylide and aromatic amine are taken as raw materials, and N-H or C-H insertion reaction is carried out under different temperatures and solvents. According to the method, the defect that a metal catalyst or an oxidizing agent is used traditionally is overcome, and on the basis of the method, various alpha-amino-acid ester derivatives or diaryl acetate derivatives can be obtained by using different aromatic amines and oxygen-sulfur ylide as substrates. According to the method, the raw materials are easy to obtain, the operation is simple, the use of a catalyst and an oxidizing agent is avoided, and the method is a mild, effective, feasible and environment-friendly method for preparing the alpha-amino-acid ester and the diaryl acetate and has important application value.

The invention relates to a carboxylic ester-based wide-temperature-range electrolyte and application thereof, and belongs to the technical field of secondary batteries, and the specific scheme is as follows: the carboxylic ester-based wide-temperature-range electrolyte comprises a lithium salt and a solvent, and the solvent comprises cyclic carbonate and carboxylic ester; the carboxylic ester comprises an ester group and an alkoxy functional group, and the number of atoms on a main chain of the carboxylic ester is 5-9; the carboxylic ester comprises one or a combination of more of methyl methoxyacetate, ethyl methoxyacetate, methyl ethoxyacetate, methyl 3-methoxypropionate, ethyl 3-methoxypropionate, ethylene glycol monomethyl ether acetate, ethylene glycol monoethyl ether acetate and ethylene glycol monomethyl ether propionate. The alkoxy group of the carboxylic ester and oxygen on the ester group have high electron cloud density, dissolution of lithium salt can be promoted, meanwhile, the chain length of the carboxylic ester is increased along with introduction of the alkoxy group, the stability of the carboxylic ester is greatly improved, and the carboxylic ester integrates the advantages of linear carbonic ester and short-chain carboxylic ester.

The invention relates to polyethylene glycol glycerol ricinoleate granules as well as a preparation method and application thereof. The granules comprise first polyethylene glycol glycerol ricinoleate with an HLB (Hydrophile-Lipophile Balance) value of 17-19, second polyethylene glycol glycerol ricinoleate with an HLB value of 12-14, a carrier and vitamin E acetate. According to the invention, fatty acid and / or hydrogenated vegetable oil are / is taken as a nutritional carrier, and polyethylene glycol glycerol ricinoleate with an HLB value of 12-14 is introduced, so that the dispersity of active ingredients with a high HLB value (17-19) in the carrier is effectively improved, and granulation is facilitated; meanwhile, the vitamin E acetate is added, so that the immunity of animals can be enhanced while the effects of resisting oxidation and prolonging the shelf life of the product are achieved. The granules solve the problems that pure products are not easy to mix, inconvenient to use and the like.

The invention provides a flame-retardant polycarbonate composite material and a preparation method thereof, the flame-retardant polycarbonate composite material comprises the following raw materials in parts by weight: 100 parts of polycarbonate, 3-5 parts of an organic boron flame retardant, 2-3 parts of a phosphate flame retardant and 0.1-0.5 part of an antioxidant, and the structural formula of the organic boron flame retardant is as shown in the following formula I. According to the invention, the triazine aniline derivative and the formylphenylboronic acid acetate derivative react to prepare the organic boron flame retardant, and the organic boron flame retardant not only significantly improves the flame retardant property of the composite material, but also has a high light transmittance retention value after high-temperature aging, so that good balance between flame retardance and transmission performance is realized.

The invention discloses an ostrinia furnacalis sex attractant and a preparation method and application thereof.The sex attractant is prepared from sex pheromone and a solvent, and the sex pheromone comprises cis-12-tetradecene acetate, trans-12-tetradecene acetate and tetradecene acetate; the mass ratio of the cis-12-tetradecene acetate to the trans-12-tetradecene acetate is 3: (1-2), and the ratio of the mass sum of the cis-12-tetradecene acetate and the trans-12-tetradecene acetate to the mass of the tetradecene acetate is 3: (0.8-1.2). The sex attractant provided by the invention can significantly increase the trapping amount of Asiatic corn borers, has good stability and accuracy, and can be used for monitoring, early warning, trapping, killing and preventing Asiatic corn borers in South China.

The present invention relates to a high-temperature starch-type wetting agent and a preparation method and application thereof, wherein the wetting agent comprises an active ingredient and water, wherein the mass ratio of the active ingredient to the water is (0.05-0.15): 1, and the active ingredient comprises the following raw materials in parts by weight: 45-65 parts of a starch-based film-forming agent, 5-10 parts of a plasticizer, 15-20 parts of a lubricant, 1-2.5 parts of an emulsifier, 4-6 parts of a coupling agent, 0.5-1.5 parts of a preservative, and 0.02-0.05 parts of a defoaming agent; wherein the plasticizer is cardanol acetate, tributyl citrate, and mannitol in a mass ratio of 1:1:(1.5-2); and the starch-based film-forming agent is at least one of acetylated distarch adipate, oxidized starch, and hydroxypropyl starch. The glass fiber yarn products produced with the wetting agent have significantly reduced scattered silk defects on the cloth surface, and the amount of powder falling during the weaving process is also greatly reduced, which meets the high standard requirements for the production of printed circuit boards.

Provided is a method of producing an esterified cellulose ether having improved flowability of the powder, where the method can reduce production of fine powder in the precipitated esterified cellulose ether. The method is a method of producing hydroxypropyl methylcellulose acetate succinate powder which essentially includes an esterification reaction step, a precipitation step, a washing / recovering step and a drying step, wherein the precipitation step is a step of extruding the reaction solution, prepared in the esterification reaction step, into water from extruding ports of an extruder to form a precipitate, and then mincing the resultant precipitate to obtain a suspension containing hydroxypropyl methylcellulose acetate succinate particles.

A method for synthesizing mirogabalin besilate. The method comprises the following steps: subjecting a chiral ketene and cyanoacetate to a condensation reaction under the action of ammonium acetate to obtain an unsaturated cyano ester, then subjecting the unsaturated cyano ester and nitromethane to a condensation reaction to obtain a nitro ester, subjecting the nitro ester to high-temperature de-esterification to obtain a chiral nitronitrile, then subjecting same to nitroreduction to obtain a chiral aminonitrile, subsequently hydrolyzing the chiral aminonitrile to obtain a mirogabalin free alkali, and finally salifying the mirogabalin free alkali and benzenesulfonic acid to obtain mirogabalin besilate. In the present invention, a chiral cyclobutane quaternary carbon center is stereoscopically and specifically constructed to obtain a chiral nitro ester having a single stereoscopic configuration, thereby preventing chiral isomer waste generated by chiral isomer resolution, such that chiral column separation or chiral resolution is not required, the production cost is significantly reduced, and the residue of heavy-metal titanium in a product and environmental pollution caused by solid waste heavy-metal titanium are also prevented.

The present disclosure relates to the technical field of microsphere drug preparations, in particular to an octreotide acetate sustained-release microsphere as well as a preparation method therefor and use thereof. The preparation method includes the following steps: S1, dissolving a polylactic acid-co-glycolic acid copolymer in a first organic solvent to prepare an oil phase 1; and dissolving octreotide acetate in a second organic solvent to prepare an oil phase 2; S2, adding the oil phase 2 into the oil phase 1 under stirring conditions to obtain a suspension containing octreotide acetate; S3, transferring the suspension to an aqueous phase, and performing emulsifying to obtain a semi-cured drug-loaded microsphere; and S4, transferring the semi-cured drug-loaded microsphere to a curing phase, and removing the solvents to obtain the octreotide acetate sustained-release microsphere.

The invention relates to the technical field of cosmetics, in particular to preparation and application of a cyclodextrin-coated azelaic acid oil-control skin-care product. Comprising the following steps: S1, adding deionized water into a mixer, adding a cyclodextrin-azelaic acid inclusion compound, nicotinamide and allantoin, mixing to obtain a water phase, mixing glycerol, caprylic / capric triglyceride, polydimethylsiloxane, polysorbate-80 and tocopheryl acetate to obtain an oil phase, slowly adding the oil phase into the water phase, and shearing and emulsifying to obtain a nanoemulsion; and S2, cooling the nano-emulsion, adding carbomer while stirring, continuously cooling to room temperature, sequentially adding phenoxyethanol, ferulic acid, menthol and essence, adjusting the pH value of the emulsion with triethanolamine, homogenizing, defoaming, disinfecting and filling. By adjusting the proportion of the components in the formula, the skin feeling of the product can be further optimized, so that the product is more comfortable and not greasy, and a lasting oil control effect is provided.

The invention relates to the field of skin care products, in particular to micro-capsule acne removal cream and a preparation method thereof. The micro-capsule acne-removing cream is prepared from the following components: a humectant, a skin conditioner, a suspending agent, a pH regulator and aloe barbadensis leaf water, behenyl alcohol, arachil alcohol, stearic acid, ethylhexyl hydroxystearate, an artemisia annua extract, pentaerythritol tetrakis (ethylhexanoate) ester, polydimethylsiloxane, tocopheryl acetate and squalane are used as raw materials; and carbomer. The anti-acne cream provided by the invention has the novel appearance of transparent gel and coated particles, can form a micro-capsule structure, and has the advantages of enhancing the anti-acne effect and fully exerting the effects of active substances.

Propylene glycol 1-monomethyl ether 2-acetate, Acetic acid, Propionic acid, Water, A propylene glycol monomethyl ether acetate composition comprising: The content of the propionic acid is 2 ppm or more and 30 ppm or less based on 100% by mass of the propylene glycol monomethyl ether acetate composition, the sum of the contents of the acetic acid and the propionic acid is 5 ppm or more and 80 ppm or less with respect to 100% by mass of the propylene glycol monomethyl ether acetate composition; A propylene glycol monomethyl ether acetate composition, wherein the water content is 17 ppm or more and 250 ppm or less, based on 100 mass % of the propylene glycol monomethyl ether acetate composition.

The invention relates to the field of external cosmetics for eyes, in particular to double-resistance eye cream and a preparation method thereof. The double-resistance eye cream is prepared from the following components in percentage by mass: 4-hydroxyethyl piperazine ethanesulfonic acid, betaine, dipropylene glycol, allantoin, a chelating agent and water, an ammonium acryloyldimethyl taurate / VP copolymer; the invention relates to a skin care product which is prepared from the following raw materials: cetostearyl alcohol wheat straw glycoside, cetostearyl alcohol, glyceryl stearate, PEG-100 stearate, caprylic / capric triglyceride, emblic leafflower fruit extract, polydimethylsiloxane, tocopheryl acetate and behenyl alcohol. Tranexamic acid; a whitening supplement; a bacteriostatic agent; and pine mushroom extract. Aiming at three causes causing periorbital problems, such as skin oxidation, skin saccharification and inflammatory reaction, through a multi-section target spot effect, multiple chains snip dark eyes, refine and lighten wrinkles, and restore elasticity, smoothness and brightness.

It relates to the use of bis(acetylthio) methane as a fragrance ingredient, a fragrance comprising such fragrance ingredient, as well as to a perfumed product comprising an effective perfuming amount of bis(acetylthio) methane. It also relates to its use in combination with S,S-ethylidene dithioacetate, to fragrances, as well as the perfumed products comprising them.

The invention discloses a solvent type cleaning agent for replacing dichloromethane, which is characterized by comprising the following components in parts by weight: 70-90 parts of hydrocarbon solvent D40; 0 to 15 parts of chlorinated methoxy fatty acid methyl ester; and 0-15 parts of butanediol diacetate, wherein the number of parts of the chloro-methoxy fatty acid methyl ester or butanediol diacetate is not 0 at the same time. Compared with the existing dichloromethane cleaning agent, the cleaning agent disclosed by the invention has the advantages of low toxicity, low volatilization amount, no corrosivity, low VOC (Volatile Organic Compounds), certain anti-rust capability and no key control pollutant CFC113, carbon tetrachloride and trichloroethylene.

The present invention addresses the problem of improving the change in smell of stearyl glycyrrhetinate,. This composition is characterized by containing components (A)–(C). (A) Stearyl glycyrrhetinate, (B) niacinamide or tranexamic acid, and (C) at least one compound selected from the group that consists of anisyl alcohol, farnesol, eugenol, citronellol, α-pinene, 1-hexanol (hexen-1-ol), linalool, cedryl acetate, Iso E Super, Sandalore, Ambroxan, γ-terpinene, ambrettolide, β-ionone, borneol, isobutyl quinoline, citral, guaiacol, patchouli alcohol, cedrol, ethyl vanillin, maltol, linalyl acetate, α-terpineol, benzyl benzoate, damascenone, anisaldehyde, benzaldehyde, Magnolan, Mayol, phenylacetaldehyde dimethyl acetal, nerol, dimethyl benzyl carbinol, Bacdanol, methyl anthranilate, Muscenone, benzyl acetate, phenylethyl alcohol, phenylethyl acetate, and heliotropine.

A resin composition contains a resin that includes a monomer unit derived from (A) an acetoacetic acid ester compound including two or more acetoacetic acid ester groups in a molecule and a monomer unit derived from (B) an amine compound including two or more primary amino groups in a molecule, and that has a three-dimensional crosslinked structure in which an acetoacetic acid ester group of the (A) acetoacetic acid ester compound and a primary amino group of the (B) amine compound are condensation bonded.

Disclosed herein are compositions that include a combination of: (1) a non-caffeine stimulant or nootropic (e.g., paraxanthine); (2) a ketone body or ketone body precursor, such as beta-hydroxybutyrate (BHB) salt, BHB ester, BHB acid, acetoacetate salt, acetoacetate ester, acetoacetic acid, 1,3-butanediol, medium chain fatty acid, or ester of medium chain fatty acid; and (3) optionally a dietetically or pharmaceutically acceptable carrier. The composition may include a vasodilator. The composition may include a short or medium chain fatty acid or ester thereof in addition to or instead of the ketone body or ketone body precursor. The composition can provide enhanced cognitive flexibility, improved sustained attention, improved working memory, and neuroprotection in a mammal. The composition can also beneficially increase resting energy expenditure (resting metabolic rate), particularly when in a state of ketosis, enhancing fat loss principally through ketosis while promoting muscle formation and maintenance, as well as modulating lethargy / lightheadedness when entering a ketogenic state.

The utility model relates to the technical field of distillation towers, in particular to a distillation tower for acetic ester production. The utility model provides the distillation tower for acetic ester production, which is convenient for quickly draining steam. A distillation tower for acetate production comprises a tower body, a liquid inlet pipe, a steam collecting cover, a flow dividing cover, a fairing and the like, the upper side of the interior of the tower body is connected with the flow dividing cover, the flow dividing cover is located below the liquid inlet pipe in the tower body, the top of the flow dividing cover is connected with the fairing, and the upper end of the fairing is in butt joint with the steam collecting cover. The injected liquid can be uniformly shunted to the heating pipe below through the shunting cover, so that the injected liquid can be quickly heated and distilled by the heating pipe and the heating rod; and through the joint matching effect of the fairing and the flow dividing cover, the generated steam can be collected towards the middle part of the tower body and is upwards drained into the steam collecting cover, and then through the matching effect of the steam discharge pipe and the return pipe, the collected steam can be quickly discharged.

The invention belongs to the field of polymer materials, and provides an environment-friendly high polymer material capable of regulating and controlling a dynamic network and a preparation and closed-loop recovery method thereof, and the preparation and closed-loop recovery method comprises the following steps: carrying out photopolymerization reaction on acetoacetic acid alkene and mercaptans with different functionalities in a solvent to obtain a polyfunctional acetoacetic ester polymer; carrying out a cross-linking reaction on the acetoacetate polymer and a polyamine monomer in a solvent to obtain a prepolymer; and curing the prepolymer to obtain a Vitrimer polymer film, and annealing to obtain the Vitrimer polymer film. Acetoacetate polymers with different branching conditions are prepared through an alkene click reaction, the material is endowed with different network structures, and dynamic and mechanical properties of the network are regulated and controlled by regulating the network and cross-linking points; and meanwhile, the introduction of the vinyl amine ester bond to the polymer network provides possibility for closed-loop recovery upgrading of the polymer network.

The invention relates to the technical field of hair spray, in particular to styling and fluffy hair spray as well as a preparation method and application thereof. The hair gel is prepared from the setting agent, the magnesium silicate, the panthenol, the tocopheryl acetate, the hydrolyzed keratin, the black tea extract prepared by a specific process and the like as raw materials, so that the hair gel has excellent hair setting and fluffy effects, the hair to which the hair gel is applied is easy to comb, and meanwhile, the hair gel can also reduce scalp inflammation and pruritus and has a good application prospect. The scalp is moistened and moisturized.

The invention belongs to the field of polymer chemistry and biological medicine materials, and relates to application of a polymer polysaccharide slow-release carrier in medicinal and edible components and a preparation method of the polymer polysaccharide slow-release carrier. The carrier is composed of phytic acid-genipin cross-linked modified chitosan, tannic acid, sodium lactate, glycerin, vitamin E acetate, sodium alginate and deionized water. The phytic acid-genipin cross-linked modified chitosan is prepared by reacting chitosan with phytic acid and genipin, and has reversible cross-linking and polydentate coordination properties; the tannic acid and the modified chitosan can form a multi-point hydrogen bond and esterification network. The carrier is prepared through sol-gel forming or spray drying, is stable in structure, good in dispersity, high in drug loading capacity, stable in an acid environment and controllable in release under a neutral condition, remarkably improves the slow release performance and bioavailability of medicinal and edible components, and is suitable for functional food and drug delivery systems.

The invention discloses a method for preparing a hair care agent by mildly extracting high-quality alligator oil. Comprising the following raw materials in percentage by weight: 85 to 90 percent of alligator oil, 2 to 3 percent of cacumen biotae extract, 2 to 3 percent of polygonum multiflorum root extract, 1 to 2 percent of rosemary leaf oil, 0.75 to 1.25 percent of acantharia kernel oil, 0.75 to 1.25 percent of Angelica rotundifolia root oil, 0.75 to 1.25 percent of cananga odorata flower oil and 0.75 to 1.25 percent of duckweed oil. The traditional Chinese medicine composition is prepared from the following components in percentage by weight: 0.25 to 0.75 percent of rhizoma chuanxiong root extract, 0.2 to 0.5 percent of peppermint oil, 0.2 to 0.5 percent of liquorice root extract, 0.2 to 0.5 percent of patchouli oil, 0.2 to 0.5 percent of ethylhexylglycerin, 0.1 to 0.3 percent of ginger root oil and 0.5 to 2 percent of tocopheryl acetate. The sum of the components of the hair care agent is 100%; after the raw materials are combined and treated, the hair conditioner has the effects of promoting hair growth, increasing hair follicle activity, enhancing hair toughness, reducing alopecia, improving scalp environment, resisting inflammation and bacteria, balancing grease secretion, reducing dandruff and itching, repairing and nourishing hair, deeply nourishing and repairing damaged hair, increasing smoothness and glossiness and delaying hair aging.

The invention relates to the technical field of skin care essence, in particular to double-layer essence with an anti-aging effect and a preparation method thereof.The double-layer essence with the anti-aging effect is composed of a water phase layer and an oil phase layer; the water-phase layer is prepared from the following raw materials in percentage by mass: 3-8% of hydroxypropyl tetrahydropyrantriol, 0.1-0.5% of tetrahydromethylpyrimidine carboxylic acid, 0.01-0.1% of a pepper kava extract, 1-5% of lactobacillus / soybean milk fermentation product filtrate, 1-5% of vitamin C ethyl ether, 1-5% of acetylchitosamine, 3-8% of 1, 3-butanediol and the balance of water. The invention relates to an anti-aging mask which comprises the following components in percentage by weight: 1-10% of 1, 3-butanediol, 0.01-0.1% of sodium hyaluronate, 0.1-0.5% of a buffer system, 5-10% of glycerol and the balance of deionized The oil phase layer is prepared from the following raw materials: 0.5-2% of ascorbyl tetraisopalmitate, 11-44% of compound plant-derived grease and 0.05-0.3% of tocopheryl acetate, and the problems that existing essence oil is lack of a multi-dimensional synergistic anti-aging effect, and the stability and transdermal absorption efficiency of water-soluble active ingredients and oil-soluble ingredients are difficult to consider are solved.