42 results about "Propyl formate" patented technology

The invention discloses a preparation method of a facial mask containing ossein. The preparation method comprises the following steps: (1) dissolving the ossein into a part of deionized water, then adding disodium EDTA, imadazolidinyl urea, glycerol, butanediol, allantoin, carbopol, polyacrylate cross-linked polymer-6 and sodium hyaluronate, heating and dispersing the mixture, and using the mixture as an A phase for standby use; (2) adding stearyl ether-2, stearyl ether-21, octyldodecanol, white mineral oil, vitamin E acetate, nipagin methyl formate, nipagin propyl formate and silicone oil into an oil phase, heating and dispersing the mixture, and using the mixture as a B phase for standby use; (3) starting a stirrer, slowly adding the B phase into the A phase, adding nicotinamide and triethanolamine after continuously stirring and cooling, adding essence, hydrolyzed elastin, palmitoyl pentapeptide and pea peptide, continuously stirring and cooling, and stopping stirring, thus discharging. According to the facial mask containing the ossein, disclosed by the invention, the elasticity and the softness of skins around eyes can be effectively increased, the skins are kept to be smooth and compact, fine lines of the skins can be relieved, and the skins are beautified.

The invention relates to a drug-loading method for a drug-eluting balloon catheter, which comprises the following steps: ① Swelling the balloon first, and the swelling treatment time is 0.5h-3h; Spray the mixture of solvent and solvent on the surface of the swollen balloon, and let it dry naturally for 10-30 minutes. The weight-number ratio of solvent, therapeutic drug and additive in the mixed liquid is 10-90:0.5-30:5-60. Step ① The solution used for swelling the balloon is methyl formate, ethyl acetate, ethyl formate, methyl acetate, propyl formate, methyl propionate, ethyl propionate, phenyl acetate, octyl acrylate and any one of methyl benzoate, or a mixture of two or more of them. The drug-loading method of the drug-eluting balloon catheter of the invention can make the drug coating uniform and firm, and the drug release is rapid and stable.

The invention relates to a non-chrome passivating agent for steel, zinc plates, aluminum and aluminum alloy pieces, zinc and zinc alloy, which consists of the following materials in percentage by mass: 15 to 35 percent of amino propyl formate resin, 2.0 to 4.0 percent of r-mercaptopropyltrimethoxysilane, 0.1 to 0.5 percent of fluorozirconate, 0.5 to 1.0 percent of acetic acid, 8.0 to 10.0 percent of glycerol silane ether, 0.05 to 0.10 percent of ammonium dihydrogen phosphate, 1.0 to 3.0 percent of butyl cellusolve, 3.0 to 8.0 percent of polyoxyethylene, 0.1 to 0.5 percent of organic lanthanide compound, 0.01 to 0.10 percent of polyoxyethylene polyoxypropylene ether, and the balance of pure water. The non-chrome passivating agent has the advantage that the non-chrome passivating agent is a surfactant with non-nickel, non-chrome, non-sodium nitrite, non-nitrate, non-fluorine ions, non-three strong acids and easy degradation.

The invention relates to the technical field of synthesis of pharmaceutical intermediates, in particular to a preparation method of o-fluorobenzaldehyde, comprising the following steps: dissolving propyl formate in anhydrous tetrahydrofuran to obtain solution A; dissolving o-fluorobromobenzene in anhydrous tetrahydrofuran , to obtain solution B; put anhydrous lithium chloride and magnesium into the reaction flask, add anhydrous tetrahydrofuran, heat to slightly boil, drop dibromoethane to initiate the reaction; under reflux, add solution B to the reaction flask; feeding is complete , lower the temperature, and then add solution A dropwise; after feeding, continue the reaction for a period of time; lower the temperature, quench with dilute hydrochloric acid, post-process, and refine by vacuum distillation to obtain o-fluorobenzaldehyde. The method of the present invention forms stable and less active benzylmagnesium lithium chloride by adding lithium chloride when preparing the Grignard reagent; the reaction of propyl formate with it is controllable, and only reacts with a less active benzylmagnesium lithium chloride, so that The reaction stays at the aldehyde stage instead of going further to the alcohol stage.

The invention belongs to the technical field of lithium batteries, and specifically relates to a method for preparing a lithium battery. The electrolyte of the lithium battery includes lithium salts, organic solvents, organic free radicals and additives; the organic solvent includes the following mass fraction raw materials: : 20-22 parts of ethyl formate, 10-12 parts of propyl formate, 18-20 parts of methyl acetate, 30-35 parts of propyl acetate and 11-22 parts of ethylene carbonate; the lithium salt is lithium tetrafluoroborate ; The additive comprises the following mass fraction raw materials: 30-40 parts of vinylene carbonate, 20-35 parts of fluoroethylene carbonate and 20-25 parts of cyclohexene; the ring-shaped battery includes a ring-shaped barrel, a sealing cover and a negative electrode column; the negative pole column is fixed in the middle of the annular barrel through insulating rubber; the positive electrode ring is fixed in the annular barrel; the positive electrode ring is fixed in the annular barrel through insulating rubber, and the positive electrode ring is the positive pole; the negative pole is the negative pole of the annular battery; a diaphragm is arranged inside the positive pole ring.

The invention relates to the technical field of medical intermediate synthesis, in particular to a preparation method of 2-fluorobenzaldehyde. The method comprises the following steps that propyl formate is dissolved into anhydrous tetrahydrofuran, and a solution A is obtained; 2-bromofluorobenzene is dissolved into anhydrous tetrahydrofuran, and a solution B is obtained; anhydrous lithium chloride and magnesium are put into a reaction flask, anhydrous tetrahydrofuran is added, heating is conducted to micro-boiling, dibromoethane is dropwise added, and a reaction is triggered; under backflow,a solution B is added into the reaction bottle; feeding is finished, cooling is conducted, and the solution A is dropwise added; feeding is finished, and the reaction continues to be conducted for a period of time; cooling is conducted, diluted hydrochloric acid is quenched, aftertreatment is conducted, vacuum distillation refining is conducted, and 1-phenyl-2-butanone is obtained. According to the method, when a Grignard reagent is prepared, astable benzyl magnesium lithium chloride low in activity is formed by adding lithium chloride; a reaction of propyl formate and the benzyl magnesium lithium chloride is controllable, propyl formate only reacts with one benzyl magnesium lithium chloride, and the reaction is stopped at the aldehyde stage but not further goes to the alcohol stage.

The invention discloses a preparation method of sodium salt of pravastatin, which comprises the following steps: adding inorganic alkaline or organic alkaline containing sodium ions as positive ions into organic solution containing the pravastatin until pH is more than 7 and obtaining sodium pravastatin; the organic solution containing the pravastatin comprises the pravastatin and first solvent, wherein the first solvent is selected from one or a plurality of methyl formate, n-propyl formate, isopropyl formate, n-butyl formate, methyl acetate, ethyl acetate, n-propyl acetate, isopropyl acetate, n-butyl acetate, sec-butyl acetate, isobutyl acetate and tert-butyl acetate.

The invention provides a toothpaste containing various plant extracts, which is composed of cistanche extract, reed root extract, hop extract, apocynum extract, sorbitol, liquid flavor, methylparaben, paraben Propyl formate, polyethylene glycol-400, xanthan gum, titanium dioxide, silicon dioxide, sodium lauryl sulfate, and water, and a preparation method is also provided, adding cistanche extract, hops extract, and Robbie to water Hemp extract, add xanthan gum and stir after heating, add polyethylene glycol-400 and sorbitol and stir, add titanium dioxide, silicon dioxide, sodium lauryl sulfate and reed root extract and stir in vacuum, add methyl hydroxybenzoate The liquid essence solution of ester and propyl p-hydroxybenzoate is stirred in vacuum to obtain toothpaste containing various plant extracts. Compared with the currently used chemical fungicides with potential safety concerns, the natural plant extract used in the present invention has the active ingredient of a plant-derived natural product, which is safe to use, has no side effects and has obvious effects.

The present invention provides a rapid-hardening underground pipeline grouting repair polymer and a preparing method thereof for underground pipes. The rapid-hardening underground pipeline grouting repair polymer comprises the base resin and the hardener, weight ratio of which is 2:1-1:1. The base resin comprises 50 to 160 parts by weight of an isocyanate; 20 to 100 parts of a chlorophosphate mixture with a density over 1400 kg / m3; a parts by weight ratio of the isocyanate and chlorophosphate is 1:1-4:1. The hardener comprises 30 to 60 parts by weight of a chlorophosphate mixture with a density over 1400 kg / m3, 5 to 15 parts of a propyl formate, a methyl propionate or a mixture of a propyl formate and a methyl propionate, 15 to 55 parts of a polyol, 1 to 3 parts of a surfactant, 2 to 6 parts of a catalyst, 0 to 0.5 parts of water and 0 to 1 parts of a colorant.