108 results about "Ketone solvents" patented technology

The invention discloses a preparation method and application of a water-based polyamide acid sizing agent, and belongs to the technical field of sizing agents. The method comprises the following steps: synthesizing polyamic acid in an organic solvent by adopting dianhydride and diamine in a polymerization manner, after the reaction is finished, cooling a polyamic acid solution to room temperature, transferring into a dropping funnel, dropwise adding into a solvent of which the volume is 10-25 times that of the solution, separating, completely dropwise adding, collecting a precipitate, and drying to obtain solid polyamic acid; and adding a low-grade ester or low-grade ketone solvent into the deionized water, adding the polyamide acid powder into the mixed solvent according to the solid content of 1-20wt.%, stirring at room temperature until the solid disappears, and standing for liquid separation to obtain a lower layer which is the polyamide acid water-based sizing agent. The sizing agent disclosed by the invention shows excellent dispersity and long-term stability. After sizing, polyamide acid on the surface of the carbon fiber is converted into polyimide through a thermal imidization reaction, so that the carbon fiber has high thermal stability and excellent compatibility.

The present invention belongs to the technical field of lithium chloride purification, and specifically relates to a method and a device for purifying lithium chloride containing organic matter. The method for purifying lithium chloride containing organic matter comprises the following steps: calcining the organic lithium chloride raw material under an oxygen-containing atmosphere, dissolving the obtained sintered product in a dissolving solution, filtering to obtain a purified solution, then subjecting it to N-level precipitation filtration cold box treatment, recovering the obtained filtrate as a dissolving solution for recycling, and drying the obtained solid to obtain a lithium chloride product; the dissolving solution comprises an organic solvent I and an organic solvent II, the organic solvent I is selected from at least one of pyrrolidone solvents, amide solvents, lactam solvents, and piperidone solvents, and the organic solvent II is selected from urea solvents and / or alcohol solvents. The purification method provided by the present invention obtains a high-purity lithium chloride product through the mutual cooperation of various processing steps, and the yield is high, and the recovered solvent has a low impurity content and can be recycled for a long time.

The invention relates to a low-total-chlorine epoxy resin synthesis method, and belongs to the technical field of epoxy resin preparation. The invention provides a low-total-chlorine epoxy resin synthesis method. The low-total-chlorine epoxy resin synthesis method comprises the following steps: carrying out ring-opening reaction on a dihydric phenol compound and epoxy chloropropane in a mixed organic solvent under the action of alkali metal hydroxide; the mixed organic solvent is composed of a ketone solvent and an ether solvent, the ketone solvent is diisobutyl ketone, and the ether solvent is butyl ether and / or a branched ether compound; then carrying out mixed reaction on the system after the ring-opening reaction and an alkali metal hydroxide solution so as to carry out ring-closing reaction on a ring-opening reaction product; and finally, carrying out impurity removal and purification on the system after the ring-closure reaction to obtain the low-total-chlorine epoxy resin.

A bio-electrode composition contains (A) an ionic polymer material, (B) an addition reaction-curable silicone having at least a hydrosilyl group, (C) a platinum-group catalyst, and a solvent. The bio-electrode composition has a water content of 0.2 mass % or less. The solvent includes one or more of an ether solvent, an ester solvent, and a ketone solvent each of which does not contain a hydroxy group, a carboxyl group, a nitrogen atom, or a thiol group. Thus, present invention provides: a bio-electrode composition capable of forming a living body contact layer for a bio-electrode which is excellent in electric conductivity and biocompatibility, light-weight, and manufacturable at low cost, and which does not leave residue on skin after attachment to and peeling from the skin; a bio-electrode including a living body contact layer formed of the bio-electrode composition; and a method for manufacturing the bio-electrode.

The invention discloses a method for depolymerizing polyester. The method comprises forming a polyester comprising the following components (a), (b) and (c): (a) a polyester, (b) one or more basic compounds selected from the group consisting of alkali metal hydroxides, alkali metal carbonates, alkali metal bicarbonate salts, alkaline earth metal hydroxides, alkaline earth metal carbonates and alkaline earth metal bicarbonate salts, and (c) and a step of depolymerizing the polyester in the mixture of a solvent containing at least one of an alcohol-based solvent and a ketone-based solvent. The temperature of the mixture at the time when the mixture containing the total amount of the polyester, the basic compound, and the solvent is formed is 75 DEG C or less. The ratio of the amount of the polyester to the amount of the solvent is 0.2-20 by mass.

The present application relates to the technical field of gas sensitive material synthesis, in particular to a preparation of a hemin nanosphere-graphene composite material and its application in detecting nitric oxide gas, and provides a preparation method of the hemin nanosphere-graphene composite material, wherein the hemin is first treated at high temperature in a ketone solvent, and then the hemin nanosphere is obtained after purification and drying; and the hemin nanosphere and graphene oxide are subjected to alcohol thermal reaction to obtain the hemin nanosphere-graphene composite material. The hemin nanosphere-graphene composite material is prepared into a gas sensitive electrode and applied to the detection of nitric oxide gas, and the electrode has good effects, can work at room temperature, and has the characteristics of strong selectivity, high sensitivity, low power consumption, high stability and fast recovery.

The invention belongs to the technical field of solar cells, and relates to an ultraviolet protection liquid for a perovskite solar cell module and application thereof, the ultraviolet protection liquid for the perovskite solar cell module comprises an ultraviolet curing adhesive and an organic solvent; the organic solvent comprises a solvent A and a solvent B, the solvent A comprises an aromatic hydrocarbon solvent, the solvent B comprises any one of a ketone solvent, an ether solvent or an aliphatic hydrocarbon solvent, and the viscosity of the ultraviolet protection liquid is 500-800 mPa.s. According to the ultraviolet protection liquid disclosed by the invention, the ultraviolet curing adhesive and two different organic solvents are matched, the viscosity is low, and a film can be quickly formed under the conditions of low temperature and low power, so that the influence of high temperature, high ultraviolet curing power and long-time ultraviolet curing on a functional layer in the preparation process is avoided; the light transmittance is high, the film forming quality is high, in addition, the negative effect on normal use of the assembly is avoided, and the long-term operation stability and the photoelectric property of the assembly are improved.

This invention discloses a method for preparing polyethylene cyclohexanedicarboxylate (PECCHD) from waste PET. Specifically, it relates to a solvent composition for dissolving PET, characterized in that the solvent composition comprises a first solvent and a second solvent; the first solvent is a haloalcohol solvent or a cyclic ether solvent; the second solvent is one or more of a cyclic ether solvent, a chain ether solvent, a nitrile solvent, a ketone solvent, or a haloalkane solvent; the chain ether solvent is a chain ether solvent with 2-4 oxygen atoms; the volume ratio of the first solvent to the second solvent is 1:(1-5); the first solvent and the second solvent are not the same solvent. This method has significant advantages in terms of raw material adaptability, reaction efficiency, and industrialization potential, achieving a highly efficient conversion from low-end waste PET to high-value-added PECHD.

The invention discloses a reductive photoresist stripper and a preparation method and application thereof, and the reductive photoresist stripper comprises the following raw materials by mass: 30-60 parts of a ketone solvent; 30-60 parts of an aprotic polar organic solvent; 3-10 parts of quaternary ammonium base; 1-5 parts of a phenol substance; and 1-5 parts of alcohol amine. The invention also discloses a preparation method of the reductive photoresist stripping liquid and application of the reductive photoresist stripping liquid in the field of photoresist removal. On the basis of effectively removing the photoresist, the reductive photoresist stripping liquid also has a good protection effect on metal electrodes (such as Cu, Ni, Al and the like), and can effectively prevent the metal electrodes from being oxidized to generate an oxidation film. In addition, the two nucleophilic solvents are synergistically used, so that the photoresist can be more effectively removed.

The application discloses an interface control liquid for prelithiation electrodes, a preparation method and application, and the interface control liquid comprises a solvent and a metal salt; the solvent comprises one or more of an ether solvent, an ester solvent, a ketone solvent, a hydrocarbon solvent, a nitrile solvent or deionized water; the metal salt comprises one or more of lithium hexafluorophosphate, lithium tetrafluoroborate, lithium hexafluoroarsenate, lithium bisoxalate borate, lithium bisfluorosulfonimide, lithium bistrifluoromethylsulfonimide, lithium perchlorate, lithium fluoride and lithium chloride; the concentration of the metal salt is 0.001 g / mL-10 g / mL; the prelithiation electrode is obtained by supplementing lithium to an electrode by a chemical prelithiation solution; the interface control liquid is used for modifying the prelithiation electrode, the metal salt of the interface control liquid reacts with the chemical prelithiation solution remaining on the surface of the prelithiation electrode, and a solid electrolyte layer containing inorganic lithium salt is generated on the surface of the prelithiation electrode; wherein, the content of the inorganic lithium salt is between 5% and 90%.

The invention belongs to the technical field of organic synthesis, and particularly relates to a preparation method of sulfaguanidine. The invention provides a preparation method of sulfaguanidine, which comprises the following steps: mixing p-acetamidobenzene sulfonyl chloride, guanidine salt, strong base and ketone solvent for the first time, and then carrying out condensation reaction to obtain sulfaguanidine; mixing acetylsulfaguanidine with water for the second time, then adjusting the pH value to 8-9, and adding amide hydrolase for hydrolysis to obtain sulfaguanidine. According to the preparation method provided by the invention, a biological enzyme method is introduced for hydrolysis, so that the hydrolysis efficiency is high, the product conversion rate is high, the enzyme can be repeatedly recycled, the mother liquor is simple in component, can be directly recycled and reused, is simple to treat, and does not cause pressure to environmental protection; the raw materials are cheap and easy to obtain, the preparation cost is low, the reaction conditions are mild, the operation is simple and convenient, and industrial safe production is facilitated; the sulfaguanidine prepared by the preparation method provided by the invention has relatively high purity and relatively high yield.

The invention belongs to the technical field of biomass materials and green chemical engineering, and discloses a green preparation method and system of a high-porosity cellulose porous membrane based on solvent replacement. The invention aims to solve the problems that the pore structure is easy to dry and collapse, the solvent cost is high and the environment is not protected when the cellulose porous membrane is prepared in the prior art. The core of the method is that cellulose is dissolved in a lithium bromide aqueous solution, and a cellulose hydrogel network is formed through cooling solidification and washing regeneration; then, completely replacing the hydrogel by using a low-surface-tension alcohol or ketone solvent (such as tertiary butanol) so as to eliminate destructive capillary force in the drying process and maintain a porous structure; and finally, drying at normal pressure to obtain the high-porosity cellulose membrane. The core of the system is that a three-loop recycling system of lithium bromide and alcohol or ketone solvents is integrally designed, and near-zero emission and cyclic utilization of the solvents are achieved. The prepared cellulose porous membrane is high in porosity (50-80%) and controllable in structure, and the whole process is green, economical and suitable for large-scale production.

This invention belongs to the field of polyolefin preparation and relates to a method for preparing a polyolefin material with low metal impurities and resistance to precipitation. The method includes the following steps: (1) adding polyolefin resin raw material and fatty ketone solvent into the extraction vessel of a supercritical extraction device, introducing a gaseous medium into the extraction vessel, adjusting the temperature and pressure of the extraction vessel to make the gaseous medium be in a supercritical state, and treating the polyolefin resin raw material in a supercritical fluid; the fatty ketone solvent is C3-C 10 (1) At least one of the fatty ketone solvents; (2) Cooling and depressurizing to separate the polyolefin resin raw material from the solvent phase and drying it to obtain the polyolefin material with low metal impurities and resistance to precipitation. The method provided by the present invention has high efficiency in removing metal impurities from polyolefins and simultaneously achieves the removal and control of the content of soluble polymers, which significantly improves the purity and precipitation resistance of polyolefin resins.

The application belongs to the technical field of solar cells, and relates to an ultraviolet protection liquid for a perovskite solar cell assembly and application thereof.The ultraviolet protection liquid for the perovskite solar cell assembly comprises ultraviolet curing glue and an organic solvent; the organic solvent comprises solvent A and solvent B, the solvent A comprises aromatic hydrocarbon solvents, the solvent B comprises any one of ketone solvents, ether solvents or aliphatic hydrocarbon solvents, and the viscosity of the ultraviolet protection liquid is 500 mPa.s to 800 mPa.s.The ultraviolet protection liquid is matched with the ultraviolet curing glue and two different organic solvents, has low viscosity, can quickly form a film under low-temperature and low-power conditions, and can avoid the influence of high temperature, high ultraviolet curing power and long-time ultraviolet curing on a functional layer in a preparation process; the ultraviolet protection liquid has high light transmittance and high film forming quality, and does not have a negative effect on normal use of the assembly, and improves long-term operation stability and photoelectric performance of the assembly.

The invention discloses a synthesis method of a DOTAP (3, 4-Dimethyl-1, 3-pentanedione) dissolved blood lipid. Specifically, the invention provides a synthetic method of a compound as shown in a formula I. The synthetic method is characterized by comprising the following steps: 1, in an organic solvent and in the presence of alkali and a fluorine source, carrying out deprotection reaction on a compound as shown in a formula A4, carrying out quenching reaction by using solid alkali, and recrystallizing to obtain the compound as shown in the formula I; the fluorine source is hydrogen fluoride or hydrogen fluoride salt; the recrystallization solvent is a ketone solvent and an alcohol solvent. The synthetic method disclosed by the invention has relatively high yield and purity, and the conversion from the Lyso-DOTAP-1 to the Lyso-DOTAP-2 in the synthetic process is avoided to a great extent.

A photosensitive resin composition contains a binder polymer, a photopolymerizable compound, a photopolymerization initiator, and a solvent, in which the solvent contains at least one selected from the group consisting of a ketone-based solvent having an alicyclic skeleton and an aromatic ether-based solvent.

The invention discloses a method for preparing poly (cyclohexane dioctyl phthalate) glycol ester from waste PET (polyethylene terephthalate). In particular to a solvent composition for dissolving PET (polyethylene terephthalate), which is characterized by comprising a first solvent and a second solvent, the first solvent is a halogenated alcohol solvent or a cyclic ether solvent; the second solvent is one or more of a cyclic ether solvent, a chain ether solvent, a nitrile solvent, a ketone solvent or a haloalkane solvent; the chain ether solvent is a chain ether solvent with the oxygen atom number of 2 to 4; the volume ratio of the first solvent to the second solvent is 1: (1-5); the first solvent and the second solvent are not the same solvent. The method has remarkable advantages in the aspects of raw material adaptability, reaction efficiency and industrial potential, and efficient conversion from low-end waste PET to high-added-value PECHD is realized.

The invention provides a long-acting photoresist stripping liquid and application thereof. The long-acting photoresist stripping liquid comprises the following raw materials in percentage by mass: 30-60% of an ether solvent, 10-30% of an amine solvent, 10-30% of a ketone solvent, 1-5% of an amide solvent and an alcohol amine solvent as effective components, and a trace corrosion inhibitor. Through the synergistic effect of the components, the long-acting photoresist stripping liquid disclosed by the invention has a good removal effect on photoresist residues on a wafer, is effective for a long time, basically does not corrode metal aluminum, copper and the like on a substrate, and has a good application prospect in the fields of semiconductors and LEDs (Light Emitting Diodes).

By this method for producing a compound represented by general formula (3) (wherein R1, R2, R3, R4, and n are as defined below), in which a hydrogen silane compound represented by general formula (1) (wherein each R1 independently represents a hydrogen atom, a halogen atom, or a monovalent hydrocarbon group having 1 to 20 carbon atoms, each R2 independently represents a monovalent hydrocarbon group having 1 to 20 carbon atoms, and n represents an integer of 0 to 2) and a β-ketoester compound having an unsaturated bond and represented by general formula (2) (wherein R3 represents a monovalent hydrocarbon group having 1 to 20 carbon atoms and R4 represents an unsubstituted divalent hydrocarbon group having 1 to 20 carbon atoms) are caused to undergo a hydrosilylation reaction in the presence of a ketone solvent using a platinum catalyst, a plurality of side reactions can be suppressed while enhancing the reactivity of the hydrosilylation reaction that is the main reaction, and a target product can be produced with a high yield.

The invention provides a polyurethane-epoxy hybrid microporous elastomer as well as a preparation method and application thereof. The preparation method comprises the following steps: S1, by taking dicyclopentadiene, hydrogen peroxide and formic acid as raw materials, carrying out epoxidation reaction under the catalysis of solid acid resin in the presence of a butanone solvent to prepare dicyclopentadiene-based epoxy resin; s2, dissolving dicyclopentadiene epoxy resin in an epoxy cross-linking agent, uniformly mixing the dicyclopentadiene epoxy resin with first polymer dihydric alcohol subjected to vacuum dehydration, adding isocyanate, and reacting to obtain a component B containing epoxy groups and isocyanate groups at the same time; s3, uniformly mixing second polymer dihydric alcohol, a tertiary amine epoxy curing agent, a chain extender, water and silicone oil to obtain a component A; the tertiary amine epoxy curing agent is also used as a catalyst for a polyurethane curing reaction; and S4, mixing the component A and the component B, injecting the mixture into a mold, and carrying out a curing reaction to form the polyurethane-epoxy hybrid microporous elastomer.

The invention discloses a preparation method and application of glue-ink integrated ink for heat transfer printing, and relates to the technical field of heat transfer printing ink. The thermal transfer printing ink is used for solving the problems that thermal transfer printing ink is too large in coating amount, too high in use cost and capable of causing excessive poison residues on the surface of a printed matter, so that the use safety of packaged food is affected, solvents with high toxicity such as benzene and ketone solvents are avoided, the toxicity in the printing ink is reduced, and the printing ink can be used for food packaging thermal transfer printing; by adding the glue, the stability of the printing ink is improved, the adhesive force of the printing ink on a base material is enhanced, the physical and chemical resistance of the printing ink is improved, printing ink pigments can be uniformly dispersed in the printing ink base material, the flowability and stability of the printing ink are improved, and the printing effect is clearer and more durable; the ink can inhibit the generation of foams in the ink, improve the fluidity, improve the stability and improve the printing quality, so that the printing process is smoother, the printing quality and efficiency are improved, and meanwhile, the cost is also reduced.

The invention provides a preparation method of propoxylated bisphenol A, and belongs to the field of propoxylated bisphenol A production. The method comprises the following steps: stirring and mixing bisphenol A and an alkaline aqueous solution to obtain a pre-structured system; dropwise adding epoxypropane into the pre-structured system, and carrying out a heat preservation reaction to obtain a reaction mixture; adding a water-saturated benzene solvent into the reaction mixture, and removing a lower-layer water phase to obtain an upper-layer benzene solution; under the protection of inert gas, removing the benzene solvent in the upper benzene solution to obtain an intermediate product; dissolving the intermediate product by using a ketone solvent, then adding a core-shell structure adsorbent for adsorption treatment, and removing a lower solid phase to obtain a supernatant; and removing the ketone solvent in the supernatant liquid to obtain the propoxylated bisphenol A. According to the application, the improvement of the structure regularity and the purity of the propoxylated bisphenol A is realized at the same time through the collaborative design of'ensuring the structure regularity by directionally regulating and controlling the reaction process' and'improving the purity by stepped precise impurity removal '.

The invention discloses a high-temperature-resistant solvent type acrylate pressure-sensitive adhesive and a preparation method thereof. The pressure-sensitive adhesive comprises the following components in parts by weight: comonomers: C4-C10 alkyl acrylate, a (methyl) acrylate monomer containing an epoxy group, and an unsaturated carboxylic acid monomer containing a carboxyl group; the bifunctional crosslinking system comprises a silane coupling agent containing an epoxy group and a hydrolyzable siloxane group, and an organic titanate catalyst; the mixed solvent is composed of an ester solvent and a ketone solvent; and a radical initiator. The pressure-sensitive adhesive takes a comonomer as a main body, free radical polymerization is initiated by a free radical initiator to form a main chain structure, then a silane coupling agent and organic phthalic ester are introduced, a Si-O-Si / Ti-O-Ti organic-inorganic double-crosslinking network is constructed in situ, siloxane hydrolysis crosslinking and epoxy ring-opening reaction are synchronously realized through a double-function crosslinking system, and the pressure-sensitive adhesive is prepared. And the good adhesive property is still kept at high temperature.

The invention belongs to the technical field of paint removers, and particularly relates to a star-structure silane sealing agent, a water-based paint remover and a preparation method and application of the star-structure silane sealing agent and the water-based paint remover. According to the invention, a star-shaped structure silane sealing agent with annular polysiloxane as a core and polyol as a side arm is designed and synthesized, the star-shaped structure silane sealing agent is added into a water-based paint remover, the annular polysiloxane shields and blocks volatilization of polar components in the paint remover, and the polyol side arm is combined with the polar components through hydrogen bond acting force, so that the water-based paint remover is formed. The volatilization failure of alcohol, ester or ketone solvents in the high-temperature paint removal process is avoided, the paint can be removed at a higher temperature, and the paint removal time is shortened. The polyol on the side arm of the sealing agent also has the effect of chelating inorganic ions, so that corrosion caused by deposition of metal ions in the aluminum alloy and influence of precipitation of calcium and magnesium ions in water on the emulsification effect of the oil phase component are avoided. In addition, the water-based paint remover does not contain organic solvents such as chlorinated hydrocarbon, phenols, acetone and the like, and has no influence on the health of operators and the environment.

The present invention addresses the problem of providing a method whereby it is possible to produce a polycarboxylic acid ester compound having a reduced content of specific impurities and further improved purity. As a solution, provided is a method for producing a polycarboxylic acid ester compound (1) represented by general formula (1), which is characterized by comprising an etherification reaction step in which a polyhydroxyaromatic compound represented by general formula (2) and a halogenated carboxylic acid ester compound represented by general formula (3) are subjected to an etherification reaction in the presence of a ketone solvent, the content of a monovalent aliphatic alcohol in the ketone solvent is 0.04 mass% or less, and the content of water is 2 mass% or less.

The application provides a special marking pen ink for glass slides, a preparation method and application thereof, and belongs to the technical field of ink preparation. The special marking pen ink for glass slides comprises chlorovinyl resin, aldehyde ketone resin, acrylic resin, ketone solvent, alcohol ether solvent, ester solvent, adhesion promoter, film forming aid and color paste. The ink has excellent organic solvent resistance, rubbing resistance, high humidity resistance and low temperature resistance, has strong adhesion to the smooth surface of the glass slide, is not easy to fall off after marking, and can reduce the error probability caused by repeated marking. Meanwhile, the ink has good stability, long liquid discharge duration, is not easy to dry and block the pen head in a long-term storage state, has fast drying speed of written characters, and has high use reliability. In addition, the ink raw material is easy to obtain, the preparation process is simple, does not contain strong volatile harmful components, has high use safety, can be adapted to special use environments such as medical detection and scientific research experiment, and has wide application prospect.

The invention discloses an inductor and a preparation method thereof, and a preparation method of a low-voltage integrally formed inductor material. The preparation method of the low-voltage integrally formed inductor material comprises a first particle powder processing step: mixing a first particle powder containing 90-94wt% Fe, 2.9-4.5wt% Si, 0.5-3.0wt% P, 0.5-3.0wt% B, 0.05-0.75wt% C and 0.05-0.75wt% Mn with ammonia water, drying to a moisture content of 1wt%-10wt%, and then heat treating; a resin suspension preparation step: mixing a second particle powder with at least one of a liquid epoxy resin, a liquid phenolic resin or a liquid polyester resin, and adding ester and ketone solvents for dispersion to form a resin suspension; and a mixing treatment step: mixing the resin suspension with the first particle powder after the heat treatment, and drying to obtain the low-voltage integrally formed material. The solution of the present application can reduce the pressure required for molding and improve the magnetic permeability by coordinating the selection of material components, the design of processing technology, and the design of resin formula, thereby solving the technical problems existing in the prior art.

A manufacturing process for a one-component polyurethane-modified epoxy resin emulsion, characterized in that it comprises the following steps: mixing epoxy resin, monohydroxy acrylate, dialkyl maleate, ketone solvent, aprotic polar solvent, and polymerization inhibitor to obtain a mixed solution, wherein the epoxy resin has an epoxy equivalent of ≥ 300 g / equivalent; mixing polyethylene glycol, polyether diol and / or polyester diol, diisocyanate, and organometallic catalyst, and carrying out an addition polymerization reaction to obtain a polyurethane prepolymer; mixing the mixed solution and the polyurethane prepolymer, carrying out an addition reaction, emulsification with the addition of water, and subsequent removal of the ketone solvent to obtain a water-based polyurethane epoxy emulsion.Mixing the water-based polyurethane epoxy emulsion with alkyldiamine, carrying out a Michael addition-ring-opening addition reaction to obtain a one-component polyurethane-modified epoxy resin emulsion, wherein the dialkyl maleate comprises one or more of diethyl maleate, dibutyl maleate and diisooctyl maleate.

The present disclosure relates to a process solution composition for polymer treatment comprising: a fluorine compound; a ketone-based solvent; and a polar aprotic solvent, wherein the ketone-based solvent is one or more selected from the group consisting of compounds represented by Chemical Formula 1 or Chemical Formula 2, and has an effect capable of preventing damage to various types of metals while improving the power of removing an adhesive polymer remaining on the wafer circuit surface in a semiconductor manufacturing process.

The invention relates to the technical field of tobacco cultivation, and discloses a tobacco bud inhibitor and a preparation method thereof. The tobacco bud inhibitor comprises the following components in percentage by mass: 5%-20% of indole-3-methyl acetate, 35%-70% of a ketone solvent, 8%-20% of an emulsifier and the balance of deionized water. The preparation method of the tobacco suckercide comprises the following steps: dissolving indole-3-methyl acetate in a ketone solvent to form a solution; adding an emulsifier into the solution, and uniformly stirring to form an oil phase; and adding deionized water into the oil phase, and stirring according to preset stirring parameters to obtain the tobacco suckercide. In the application, through the synergistic effect of the indole-3-methyl acetate, the ketone solvent, the emulsifier and the deionized water, not only can effective bud inhibition be realized, but also drug residues can be reduced, and the quality of tobacco leaves can be improved.