85 results about "Methyl polysiloxane" patented technology

The invention discloses a construction method and an identification method of characteristic chromatograms of a senecio scandens medicinal material as well as decoction pieces, standard decoction and formula granules thereof, and relates to the technical field of traditional Chinese medicine identification. The construction method of the specific chromatogram comprises the following steps: extracting a to-be-detected sample with methanol to obtain a test solution; the method comprises the following steps: dissolving 5-caffeoylquinic acid, chlorogenic acid, caffeic acid, 4-caffeoylquinic acid, rutin, hyperoside, isoquercitrin and 4, 5-dicaffeoylquinic acid with methanol to obtain a reference solution; and a liquid chromatograph is adopted for determination. A chromatographic column of the liquid chromatograph takes phenyl-methyl polysiloxane as a stationary phase, acetonitrile as a mobile phase A and 0.05 vol%-0.3 vol% formic acid aqueous solution as a mobile phase B for gradient elution. The information of the characteristic chromatogram constructed by the method is rich, and the quality of the senecio scandens medicinal material, decoction pieces, standard decoction and formula granules can be quickly and comprehensively reflected.

The invention relates to the technical field of hydrogel materials, and discloses an oxygen-permeable silicon hydrogel material for contact lenses and a preparation method thereof.The preparation method comprises the steps that ethylene glycol diglycidyl ether and bis (2-chloroethyl) amine hydrochloride are subjected to a ring-opening reaction, and an intermediate product 1, 2-propylene glycol is obtained; carrying out substitution and hydrolysis reaction on the polyalkenyl quaternary ammonium salt and diethyl iminodiacetate to obtain an intermediate product 2, and carrying out quaternization reaction on the intermediate product 2 and chloropropene by utilizing a tertiary amine structure contained in the intermediate product 2 to obtain the polyalkenyl quaternary ammonium salt. And finally, carrying out polymerization reaction on the silicon hydrogel, hydroxyethyl methylacrylate, gamma-(methacryloyloxy) propyltrimethoxysilane and vinyl-terminated dimethyl polysiloxane, putting the obtained product into a contact lens half mold for reaction, and demolding to obtain the oxygen-permeable silicon hydrogel material. The hydrogel material prepared in the invention has good hydrophilic effect and oxygen permeation effect, and can be widely applied to contact lenses.

The invention discloses a new energy battery cell temperature-resistant insulating coating which is prepared from a component A, a component B and a component C. The component A is prepared from, by weight, 20-60 parts of film forming matter, 15-50 parts of temperature-resistant filler, 15-25 parts of flame retardant, 10-15 parts of carrier powder, 1-2 parts of organic silicon additive and 3-5 parts of diluent, the component B is a catalyst, and the component C is a curing agent. The composition of the methyl polysiloxane resin, the epoxy modified polysiloxane resin and the silazane resin is used as a film forming substance, and the battery cell coating with high flame retardant grade and shear resistance can be obtained. The low-melting-point glass powder with the initial melting temperature of 500 DEG C is introduced into a film forming substance, so that the voltage resistance of the coating before high temperature resistance can be improved, the insulation effect of the coating is optimized, and the salt mist resistance, acid and alkali resistance, electrolyte resistance and water resistance are improved.

The invention discloses a detection method for simultaneously determining ethylene glycol and diethylene glycol in cetirizine hydrochloride drops, which comprises the following steps: step 1, setting chromatographic conditions: heating to 220 DEG C at a rate of 20 DEG C / min by using a capillary column with 6% propylphenyl-94% dimethyl polysiloxane as a stationary liquid, and maintaining for 10 minutes; step 2, solution preparation: preparing a blank solvent, a reference solution and a test solution; step 3, determination: taking the blank solvent, the reference substance solution and the test solution for sample introduction analysis, and recording a chromatogram; step 4, limit: calculating by peak area according to an external standard method, wherein the content of ethylene glycol is not more than 0.062%, and the content of diethylene glycol is not more than 0.025%; the method disclosed by the invention is simple, convenient, rapid, high in accuracy and good in specificity, can be used for simultaneously determining the contents of ethylene glycol and diethylene glycol in the cetirizine hydrochloride drops, and is suitable for quality research and control of the cetirizine hydrochloride drops.

The invention relates to the technical field of polyolefin copolymers, in particular to a high-hardness high-internal-density polyethylene propylene butylene copolymer and a preparation method thereof. The problems of low hardness and insufficient cohesion of the copolymer in the prior art are solved. The preparation method comprises the following steps: preparing an alkenyl-terminated dimethyl polysiloxane modified propylene matrix to obtain modified polypropylene; carrying out copolymerization on the modified nano calcium carbonate, 1-butene and 2-butene to obtain modified polybutene; the preparation method comprises the following steps: modifying acrylic acid and acrylamide to obtain modified polyethylene, mixing the components according to a specific ratio, carrying out polymerization reaction under the action of a composite initiator, adding melamine formaldehyde resin for crosslinking, and carrying out extrusion molding and heat treatment to obtain the copolymer. Ethylene, propylene and butylene monomers are modified, and siloxane and nano calcium carbonate are added, so that the cohesive energy of the copolymer is improved; and a three-dimensional cross-linked network is constructed by utilizing the synergistic effect of all the modified components, so that the hardness of the copolymer is improved.

The present invention relates to a surfactant composition capable of making a dimethylsiloxane highly remain the solid surface, which is a surfactant composition containing an anionic surfactant (A), a cationic surfactant (B), and a dimethylpolysiloxane (C), wherein the following molar ratio RA is 0.10 to 0.90; and the following molar ratio Rb is 0.4 or more:RA: a molar ratio {(A) / [(A)+(B)]} of the amount of the anionic surfactant (A) to the total amount of the anionic surfactant (A) and the cationic surfactant (B)Rb: a molar ratio {[(a1)+(b1)] / [(A)+(B)]} of the total amount of a branched-type anionic surfactant (a1) and a branched-type cationic surfactant (b1) to the total amount of the anionic surfactant (A) and the cationic surfactant (B).

The present invention provides: a thermally conductive silicone grease composition which has good viscosity and thermal conductivity, and in which a pump-out phenomenon upon a long period of use thereof is suppressed; and a production method for the same. The present invention comprises a matrix resin and thermally conductive inorganic particles. The matrix resin contains a component (A) and a component (B). The component (A) is an unreactive liquid dimethylpolysiloxane that has a kinematic viscosity of 100 to 10,000 mm2 / s at 25°C. The component (B) is a linear polydimethylsiloxane represented by formula (I) (where Me is methyl, n-Bu is normal butyl, and n = 5 to 1,000). The present invention contains X parts by mass of the component (A) (where X is 50 to 99.9), (100-X) parts by mass of the component (B), and 50 to 3, 000 parts by mass of the thermally conductive inorganic particles. The silicone grease composition is a non-curing product.

The invention discloses a method for detecting related substances of tribromoacetone by gas chromatography, which belongs to the technical field of chemical detection, the related substances of tribromoacetone are detected by gas chromatography, an instrument is a gas chromatograph, a detector is an FID detector, a capillary column taking 100% methylpolysiloxane (MEGA-1) as a stationary liquid is used as a chromatographic column, carrier gas is N2, the flow velocity is 2.0 mL / min, the split ratio is 50: 1, and the detection time is 30 minutes. Temperature programming: the initial temperature is 80 DEG C, and the temperature is raised to 250 DEG C at the rate of 10 DEG C per minute and maintained for 10 minutes; a sample injection mode is as follows: direct sample injection is performed, the temperature of a sample injection port is 260 DEG C, and the temperature of a detector is 280 DEG C; according to the present invention, the sample introduction volume is 0.2 [mu] l, the related substances in the tribromoacetone can be effectively separated, the content of the related substances can be quantitatively detected, the acetone, the bromoacetone, the 1, 3-dibromoacetone and the 1, 1, 3, 3-tetrabromoacetone sequentially appear peaks, and the method has characteristics of simple operation, strong specificity, good repeatability, good intermediate precision and good durability, and can accurately and rapidly determine the content of the various related substances in the tribromoacetone.

The invention relates to the technical field of composite belts, and particularly discloses a battery pack ceramic composite belt and a preparation method thereof. The invention relates to a ceramic composite belt for a battery pack. The ceramic composite belt comprises the following materials in parts by weight: 20 parts of alkyl hydrogen polysiloxane; 36 parts of divinyl terminated dimethyl polysiloxane; 15 to 25 parts of filler; 7.5 parts of silicon dioxide; 10 parts of aluminum hydroxide; 3 parts of a catalyst; 1.5 parts of polyurethane modified acrylic resin; 5 parts of polyhydroxy polysiloxane; other 2 parts; the filler comprises ceramic powder and glass fibers; the preparation method comprises the following steps: S1, preparing a base material; s2, stirring for the first time; s3, carrying out secondary stirring; and S4, preparing a composite belt finished product. The ceramic composite belt can be used in the battery pack, and has the advantages of high strength, excellent high temperature resistance and the like.

The purpose of the present invention is to provide metal oxide particles which have excellent hydrophobicity and are coated with dimethyl polysiloxane. Another object of the present invention is to provide a dispersion, a composition and a cosmetic containing metal oxide particles coated with the dimethyl polysiloxane. Another object of the invention is to provide a method for producing such metal oxide particles coated with dimethyl polysiloxane. The present invention relates to polysiloxane-coated metal oxide particles, the surfaces of which are coated with dimethyl polysiloxane, and the detection rate of hydroxyl groups is 10% or less. The present invention relates to a polysiloxane-coated metal oxide particle, and a method for preparing the polysiloxane-coated metal oxide particle, the method comprising: a surface treatment step of mixing a metal oxide particle with a dimethyl polysiloxane having a kinematic viscosity at 25 DEG C of 500 mm2 / s or more and 4000 mm2 / s or less without using a solvent to coat the surface of the metal oxide particle with the dimethyl polysiloxane; and a step for heat-treating the metal oxide particles coated with dimethyl polysiloxane at 250 DEG C or more and 380 DEG C or less.

The invention relates to the technical field of medical analysis, and particularly provides a method for determining the content of 1, 2-dichloroethane in a residual solvent of 4-cyano-2-methoxybenzaldehyde. The method comprises the following steps: 1) preparing a reference solution and a test solution; 2) setting headspace sampling conditions; 3) setting gas chromatographic analysis conditions, and separating 1, 2-dichloroethane from other impurities by using a capillary chromatographic column of 6% cyanopropyl phenyl-94% dimethyl polysiloxane and a carrier gas of nitrogen by using a heating program; and 3) respectively sucking the reference substance solution and the test solution, injecting into a gas chromatograph, and recording a chromatogram. The method disclosed by the invention can be used for rapidly, effectively, accurately and reliably detecting the content of the residual solvent 1, 2-dichloroethane of the 4-cyano-2-methoxybenzaldehyde so as to meet the requirements of drug quality control.

The present application relates to the technical field of high polymer materials, and particularly relates to a reversible color-changing microcapsule high-temperature-resistant coating and a preparation method thereof, which comprises the following components in mass ratio: inorganic polysiloxane resin 30%-40%, hydroxyl acrylic resin 10%-20%, additive 2%-5%, solvent 5%-15%, white corundum 5%-10%, silicon powder 10%-15%, and reversible color-changing microcapsule pigment 5%-15%; the reversible color-changing microcapsule pigment is synthesized by core material and wall material, and through the synergistic design of organic-inorganic hybrid wall material (methyl polysiloxane prepolymer, acrylic prepolymer and nano silicon dioxide composite) and core material phase change medium (glyceryl stearate), the problems such as insufficient high-temperature resistance of traditional thermochromic coating, slow color-changing response and poor mechanical stability of microcapsules are effectively solved.

This invention belongs to the field of organosilicon thermally conductive materials, and provides a liquid silicone rubber system for thermally conductive pads and its preparation method. The system comprises vinyl-terminated dimethyl polysiloxane, MQ / phenyl-enriched pre-crosslinked polysiloxane microgel, vinyltrimethoxysilane-modified hexagonal boron nitride, alumina, trimethylsilane-terminated dimethylsiloxane-methylhydrosiloxane copolymer, 1,3-divinyl-1,1,3,3-tetramethyldisiloxane zero-valent platinum complex, and 1-ethynyl-1-cyclohexanol, forming a two-component packaging. This system is advantageous in balancing thermal conductivity, electrical insulation, flowability, defoaming, softness and fit, and long-term stability, making it suitable for the preparation of thermally conductive pads.

The invention relates to the field of analytical chemistry, and particularly discloses a method for determining residual solvents N, N-dimethylformamide, dichloromethane, isopropanol, ethyl acetate, methyl tert-butyl ether, ethanol, acetone, tetrahydrofuran and ethylene glycol dimethyl ether in a litamilast raw material by adopting a headspace-gas chromatography method, and a method for determining residual solvents N, N-dimethylformamide, dichloromethane, isopropanol, ethyl acetate, methyl tert-butyl ether, ethanol, acetone, tetrahydrofuran and ethylene glycol dimethyl ether in a litamilast raw material by adopting a headspace-gas chromatography method. The method comprises the following steps of: detecting by using a capillary column with 6 percent of cyanopropyl phenyl-94 percent of dimethyl polysiloxane as a stationary liquid through headspace sample introduction gas chromatography and a flame ionization detector (FID). According to the method disclosed by the invention, nine residual solvents contained in the litamilast raw material can be completely separated in one system, the separation degree is greater than 1.5, the specificity is good, interference from blank solvents and other unknown impurities is avoided, the sensitivity is high, the detection accuracy is high, and the quality of litamilast can be effectively controlled.

The present invention aims to provide a silicone grease composition that offers excellent workability and oil bleed resistance, high thermal conductivity, and is less likely to scratch the substrate surface. [Solution] A thermally conductive silicone grease composition, (A) A methylpolysiloxane having three alkoxy groups at one end, represented by the following general formula (1), [Formula 1] TIFF2026049379000009.tif2670(in the formula, R 1 (where a is an alkyl group having 1 to 6 carbon atoms, and a is an integer between 10 and 100.) (B) Thermally conductive fillers having a Mohs hardness of 4 or less. A thermally conductive silicone grease composition characterized by comprising the following.

This application relates to the field of biodegradable materials, and more specifically, to a biodegradable mobile phone screen protector and its preparation method. The screen protector comprises a biodegradable film layer composed of the following raw materials in parts by weight: 100 parts bio-based plastic, 2-5 parts filler, 8-15 parts blend modifier, and 1-3 parts processing aid; the blend modifier is composed of additive A, additive B, methacrylate-terminated dimethyl polysiloxane, acrylate-hydroxypropyl acrylate copolymer, and peroxide; additive A is one or a mixture of poly(2,6-dimethyl-1,4-phenylene ether), cross-linked polyethylene, and polyvinyl butyral; additive B is composed of at least two of water-based rosin, vinylene carbonate, and hydrogenated palm kernel oil, with at least one being water-based rosin. The above scheme yields a biodegradable mobile phone screen protector with superior degradation performance, mechanical properties, and optical properties.

The invention discloses a bionic fish scale composite coating with lubrication and resistance reduction performance and a preparation method thereof, and the method comprises the following steps: (1) mixing deionized water, Tween 80, simethicone and isophorone diisocyanate, and emulsifying in an ice-water bath to form an emulsion; heating, adding ethidene diamine into the emulsion in a nitrogen environment, and carrying out polyurea synthesis reaction to prepare the polyurea microcapsule; (2) uniformly mixing hydroxyl-terminated trifluoropropyl methyl polysiloxane, isophorone diisocyanate, dibutyltin dilaurate and polyurea microcapsules, coating a base material with the mixture, vacuumizing the base material at room temperature until the base material is semi-solidified, then spraying a silicon dioxide acetone solution, continuously curing the base material, immersing the base material into dimethyl silicone oil after the base material is completely cured, and drying the base material to obtain a finished product. The bionic fish scale composite coating with the lubrication and resistance reduction performance is obtained. The prepared composite coating has excellent corrosion resistance and color changing performance. And meanwhile, the composite coating also has good lubricating and resistance-reducing performance, and can be used as a ship resistance-reducing material.

The invention belongs to the field of detection, and particularly relates to a quantitative detection method for benzene in an eltrombopag ethanolamine bulk drug. Comprising the following steps: respectively injecting a test solution and a reference solution into a gas chromatograph by adopting headspace sampling, recording a chromatogram, and carrying out quantitative analysis on the chromatogram by adopting an external standard method; wherein the detection conditions of the chromatography are as follows: a chromatographic column is a capillary column taking 6% of cyanopropyl phenyl-94% of dimethyl polysiloxane as a stationary liquid or a capillary chromatographic column with equivalent efficiency; the column temperature is programmed temperature rise: the initial temperature is 55-65 DEG C, the temperature is maintained for 3 minutes, the temperature is raised to 150 DEG C at the rate of 5 DEG C per minute, then the temperature is raised to 240 DEG C at the rate of 30 DEG C per minute, and the temperature is maintained for 5 minutes; the balance temperature of the headspace bottle is 90-100 DEG C, and the balance time is 20 minutes. The method has the advantages of strong specificity, high sensitivity and high accuracy, and can accurately quantify the benzene content in the preparation process of the eltrombopag ethanolamine bulk drug.

The invention relates to a polymer microsphere sunscreen agent and sunscreen cream prepared from the polymer microsphere sunscreen agent. The microsphere sun-screening agent can be prepared by adopting the following method: firstly, mixing methyl methacrylate, acrylamide methyl benzal camphor, vinyl terminated dimethyl polysiloxane, azodiisobutyronitrile and absolute ethyl alcohol; secondly, carrying out polymerization reaction; and finally, after the reaction is finished, centrifugally separating a reaction solution, alternately washing a centrifugal product with ethanol and water, and drying to obtain the microspheres. After the polymer microsphere sun-screening agent is doped into the prepared sunscreen cream, the sunscreen index of the sunscreen cream can reach about 42, and the sunscreen effect of the sunscreen cream is obvious; the result shows that the polymer microsphere sun-screening agent has good sun-screening performance.

The invention discloses a fracturing fluid assisted carbon dioxide huff and puff oil extraction method, and belongs to the technical field of oil and gas extraction. The fracturing fluid is prepared from the following raw materials in percentage by weight: 0.3 to 0.7 weight percent of silicon-containing tackifier, 0.1 to 0.5 weight percent of fluorine-containing tackifier, 0.8 to 1.2 weight percent of cosolvent, 6 to 23 weight percent of proppant, 0.01 to 0.1 weight percent of gel breaker and the balance of water, the silicon-containing tackifier is one or more of polydimethylsiloxane, polymethylsilsesquioxane, benzyl polysiloxane and methyl silicone oil; the silicon-containing tackifier is one or more of polydimethylsiloxane, polymethylsilsesquioxane, benzyl polysiloxane and methyl silicone oil; the fluorine-containing tackifier is a terpolymer of fluorinated acrylate, a styrene compound and maleic anhydride, and the molecular weight of the fluorine-containing tackifier is 1000 to 1500. The fracturing fluid can be used for tackifying CO2, the sand-carrying capacity of the fracturing fluid is improved, and the oil recovery rate is increased.

The present invention provides a foamable bath tablet containing the following components (A)-(D): (A) 30-50 wt% (inclusive) of (A1) sodium bicarbonate and / or (A2) sodium carbonate; (B) 25-45 wt% (inclusive) of an organic acid; (C) polyethylene glycol having a molecular weight of 1000 or more; 0.1 wt% or more of (D) one or more liquid oily components selected from the group consisting of isopropyl myristate, isopropyl palmitate, and dimethyl polysiloxane, and the weight ratio of the total content of component (C) and component (D) to the total content of component (A) and component (B), [(C) + (D)] / [(A) + (B)], is 0.14 or more. The total content of the liquid components is 0.15% by weight or more and 1.05% by weight or less.

The invention relates to a wear-resistant industrial coating and a manufacturing method thereof, and belongs to the technical field of coatings, and the coating comprises the following components: modified epoxy resin liquid, modified phenolic resin liquid, zirconium boride powder, silicon carbide powder, hexagonal boron nitride powder, flaky zinc-aluminum alloy powder, methylhexahydrophthalic anhydride, hexamethoxymethyl melamine and the like. The modified epoxy resin liquid is obtained by modifying hydrogenated bisphenol A epoxy resin with hydroxyl-terminated trifluoropropyl methyl polysiloxane; the modified phenolic resin liquid is obtained by etherifying linear phenolic resin and then mixing the etherified linear phenolic resin with soluble polyimide powder. According to the invention, a composite base material formed by hydrogenated epoxy resin and phenolic resin is combined with silicon-fluorine modification and polyimide enhancement technologies, so that the coating has strong adhesive force of epoxy resin and high temperature resistance of phenolic resin, can still keep chemical binding force with a metal substrate in a high-temperature environment, is matched with functional filler for use, and is low in increment after temperature resistance and good in heat resistance. A wear-resistant system with a hard framework and soft lubrication is formed, and corrosion resistance is achieved.

Provided is a thermally conductive silicone composition that can be turned into a lightweight cured product superior in thermal conductivity, and is easily processable due to its low viscosity. The composition contains:(A) an organopolysiloxane having at least two alkenyl groups per each molecule;(B) an organohydrogenpolysiloxane having, per each molecule, at least two hydrogen atoms directly bonded to silicon atoms;(C) a thermally conductive filler containing magnesium oxide (20 to 40% by mass), aluminum oxide (40 to 60% by mass) and aluminum hydroxide (10 to 30% by mass);(D) a dimethylpolysiloxane with one end of the molecular chain thereof being blocked by a trialkoxy group;(E) a platinum group metal-based curing catalyst; and(F) an addition reaction control agent.

The invention discloses a high-toughness paraffin material and a preparation method thereof, and relates to the technical field of paraffin. The preparation method comprises the following steps: firstly, carrying out esterification reaction on carboxyl of the reverse oleic acid and hydroxyl of the hydroxyl-terminated dimethyl polysiloxane to generate an unsaturated organic silicon intermediate, enabling the intermediate to have excellent toughness due to the existence of the generated ester group and a Si-O-Si chain segment, and providing active sites by introducing double bonds so as to be convenient for subsequent grafting; secondly, the intermediate and paraffin are subjected to reactive blending, under initiation of peroxide, the intermediate is crosslinked and grafted with a paraffin interface, and the toughness of the prepared modified paraffin material is greatly improved; meanwhile, the grafting of the PDMS chain segment in the intermediate can destroy the original regular structure of the paraffin crystal and cause the reduction of the crystallinity, so that the melting point of the paraffin is reduced, the paraffin has a wider melting range, and the melting effect of the paraffin at 40-60 DEG C is improved. The prepared paraffin material has the effects of being high in toughness and easy to melt.

Provided is a 3, 5, 5-trimethylhexanoic acid composition which contains 3, 5, 5-trimethylhexanoic acid and tertiary butanol, and which has a deuterated toluene-converted concentration of more than 0 to 400 volume ppb (inclusive) as measured by smelling gas chromatography / mass spectrometry after heating in an air atmosphere at 80 DEG C for 4 weeks. The composition has low reproductive toxicity even if stored for a long period of time. (Measurement Condition). The 3, 5, 5-trimethylhexanoic acid composition is concentrated. And measuring the concentrated sample by smelling gas chromatography using a column in which the stationary phase is dimethyl polysiloxane, and analyzing the structure of the measured components by a mass spectrometry detector.

The invention discloses an analysis method for detection and quality control of (S)-2-n-butyl hydroxybutyrate related substances, and belongs to the technical field of analytical chemistry. The method comprises the following steps: firstly, preparing a system applicability solution and a test solution; setting gas chromatography detection conditions, adopting an HP-1 chromatographic column, and using dimethyl polysiloxane as a capillary column; the system applicability solution and the test solution are taken respectively and injected into a gas chromatograph, a chromatogram is recorded, a standard curve is drawn, the content of impurities in (S)-2-n-butyl hydroxybutyrate is calculated, and the impurities in (S)-2-n-butyl hydroxybutyrate comprise (S)-2-hydroxybutyric acid, n-butyl alcohol, butyl lactate, butyl 2-butanone acid and butyl butyrate. The method disclosed by the invention is rapid, simple, convenient and effective, can separate a plurality of process impurities and degraded impurities from a main peak, fully meets the qualitative and quantitative analysis of each impurity in the product, effectively controls the product quality, and is simple and convenient to operate and good in repeatability.

We provide metal oxides with excellent hydrophobicity and a surface treatment that allows for global use. [Solution] A surface-treated metal oxide in which a metal oxide has been surface-treated with dimethylpolysiloxane, wherein the dimethylpolysiloxane has a kinematic viscosity of 50 to 500 mm at 25°C. 2 The surface-treated metal oxide is characterized by having a coefficient of / s and an oil absorption rate of 20 ml / 100 g or less.

This application relates to the field of automotive care chemicals, specifically disclosing a stain-removing automotive wax and its preparation method. The stain-removing automotive wax comprises the following raw materials in parts by weight: 14-18 parts of anti-fouling component, 18-23 parts of stain-removing gel, 9-11 parts of composite wax, 13-15 parts of emulsion, 10-13 parts of composite oil, 3-5 parts of emulsifier, 8-10 parts of thickener, and 5-8 parts of water; the anti-fouling component comprises fluoropropyl methylpolysiloxane-modified acrylate and titanium dioxide-modified mica powder in a mass ratio of 1:0.2-0.3. This application improves the stain-removing and anti-fouling performance of the automotive stain-removing wax, extending the service life and aesthetics of the automotive paint surface.

To provide a method for easily recovering siloxanes from hydrophobic organic solvents containing siloxanes.SOLUTION: There is provided a method for recovering siloxanes by extracting the siloxanes from hydrophobic organic solvents containing siloxanes such as dimethylpolysiloxane and cyclic siloxanes (such as saturated hydrocarbons and halogenated hydrocarbons) using concentrated sulfuric acid. In addition, there is also provided a method for recovering siloxanes by hydrating a mixture of concentrated sulfuric acid and siloxanes obtained by extracting siloxanes to obtain siloxanes.SELECTED DRAWING: None

The purpose of the present invention is to provide a component which is perfumed with a flavor raw material and which provides a strong cooling feeling, has excellent storage resistance, and has little bitterness. The composition component perfumed by a flavor raw material comprises a smoking product composition component and a flavor raw material, and the flavor raw material comprises a cool feeling agent (A). The cool feeling agent has a retention index (RI) of 1300 or more in a chromatogram obtained by gas chromatography-mass spectrometry (GC-MS) analysis using a column in which the stationary phase is 95% dimethylpolysiloxane / 5% phenyl-methylpolysiloxane, and the flavor raw material perfumes the constituent members of the smoking article.