56 results about "Methyl polysiloxane" patented technology

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 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 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.

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.

This product provides a water-in-oil emulsion cosmetic that does not slip during application, forms a uniform cosmetic film, and exhibits excellent emulsification stability. [Solution] The following components (A) to (E); (A) Volatile hydrocarbon oils (B) One or more selected from dimethylpolysiloxane and disiloxane (C) Ethanol (D) Metal oxides (E) Nonionic surfactants (F)Water An oil-in-oil emulsion cosmetic containing the following, wherein the mass ratio of component (A) to component (B) is (A) / (B) = 0.1 to 10.

The invention discloses a thick coating type anticorrosive paint for pipelines and a preparation method of the thick coating type anticorrosive paint, and belongs to the technical field of anticorrosive and functional coatings. The coating consists of an epoxy resin main agent and an amine curing agent which are mixed according to the mass ratio of 2.5: 1 for use. The epoxy resin main agent is prepared from bisphenol A epoxy resin, cellulose acetate butyrate, spherical nano zirconium oxide, nano silicon carbide, fumed silica, butyl glycidyl ether, an organic silicon defoaming agent and a modified polydimethylpolysiloxane flatting agent; and the amine curing agent consists of cyclic alicyclic amine and an aliphatic amine adduct. The method comprises the steps of dissolving and dispersing, adding and grinding the inorganic filler, mixing the auxiliaries, filtering and filling. The obtained coating is cured at normal temperature to form a static conductive anticorrosive coating with the thickness of 300-500 microns, and the volume resistivity is 10-10 omega.cm. Compatibility and unification of static conductivity and corrosion resistance of the thick coating are achieved, and the coating is suitable for protective coating of metal and nonmetal pipelines.

The invention belongs to the technical field of high polymer materials, and relates to a flame-retardant epoxy resin casting material and a preparation method thereof. The invention provides a preparation method of a flame-retardant epoxy resin casting material, which comprises the following steps: dissolving dimethyl polysiloxane in a lipophilic solvent, then dropwise adding onto aluminum oxide powder while stirring, and heating in a nitrogen atmosphere to obtain PDMS (Polydimethylsiloxane) modified aluminum oxide; mixing epoxy resin and silica powder in vacuum to obtain a resin mixture; mixing silane coupling agent modified DOPO, the PDMS modified aluminum oxide and an anhydride curing agent in vacuum to prepare a curing agent mixture; and performing vacuum mixing on the resin mixture and the curing agent mixture to obtain the castable. The PDMS modified aluminum oxide and the silane coupling agent modified DOPO are adopted, so that the electrical performance and the mechanical performance of the flame-retardant epoxy resin casting material are synergistically improved.

The application belongs to the technical field of analysis and detection, and particularly relates to a gas chromatography detection method of roxifurine, which adopts gas chromatography to detect roxifurine samples, wherein the stationary liquid of the chromatographic column is 5% diphenyl-95% dimethyl polysiloxane; and the detector is a hydrogen flame ionization detector. The detection method has strong specificity, good stability, good separation effect of roxifurine and impurities, and can meet the detection requirements and quality control of roxifurine.

There is provided an FRP material with reinforced non-flammability that can be utilized as an alternative to a metal material in a variety of applications. The FRP material with reinforced non-flammability includes a non-flammable coating layer formed by coating, with a non-flammable agent, a surface of a flame retardant FRP matrix containing a flame retardant resin, wherein a composition of the non-flammable coating layer includes 10 to 20 wt % of 1,3,5-triazine-2,4,6-triamine, 30 to 50 wt % of ammonium polyphosphate, 1 to 10 wt % of dimethyl polysiloxane, 10 to 20 wt % of xylene, and 10 to 30 wt % of phosphonic acid, p-methyl-, (5-ethyl-2-methyl-2-oxido-1,3,2-dioxaphosphorinan-5-yl)methyl methyl ester.

To provide a hair composition that makes it possible to achieve superior smooth feel in hair when using volatile non-cyclic silicone, and a hair treatment method using the composition.SOLUTION: A hair composition comprises a cationic surfactant, a higher alcohol, a volatile non-cyclic silicone, and a methylpolysiloxane having a kinematic viscosity at 25°C of 5 mm2 / s or more and less than 20 mm2 / s. Also provided is a hair treatment method using the composition.SELECTED DRAWING: None

Provided is a cosmetic which has excellent emulsion stability, good spreadability when applied, and excellent feeling of use, and which contains a silicone gel obtained by swelling component (a) with component (b), (a) a crosslinked glycerol-modified silicone in which dimethyl polysiloxane is crosslinked with a glycerol chain, and (b) an oil agent having a kinematic viscosity at 25 DEG C of 0.5-5 mm2 / s.

A thermally conductive polysiloxane composition includes (A) a thermally conductive filler and (B) one or more compounds selected from an alkoxysilyl group-containing compound and a dimethylpolysiloxane, wherein: component (A) includes (A-1) round, indefinite-shaped or polyhedral aluminum nitride particles having an average particle diameter of from 50 μm to 150 μm and (A-2) round, indefinite-shaped or polyhedral aluminum nitride particles having an average particle diameter of 10 μm or more but less than 50 μm in an amount of from 20% by mass to 100% by mass relative to the total amount of component (A); and the content ratio of component (A-1) to component (A-2) is from 50:50 to 95:5 on a mass basis.

This invention discloses a biomimetic fish scale composite coating with lubrication and drag reduction properties and its preparation method. The method includes the following steps: (1) mixing deionized water, Tween 80, dimethyl silicone oil, and isophorone diisocyanate, emulsifying them in an ice-water bath to form an emulsion; heating, adding ethylenediamine to the emulsion under nitrogen atmosphere, and obtaining polyurea microcapsules through a polyurea synthesis reaction; (2) mixing hydroxyl-terminated trifluoropropylmethyl polysiloxane, isophorone diisocyanate, dibutyltin dilaurate, and polyurea microcapsules evenly, coating them onto a substrate, vacuuming to semi-solidification at room temperature, then spraying a silica acetone solution, continuing to cure, and immersing in dimethyl silicone oil after complete curing to obtain the biomimetic fish scale composite coating with lubrication and drag reduction properties. The composite coating obtained by this invention has excellent anti-corrosion and color-changing properties. At the same time, the composite coating also has good lubrication and drag reduction properties and can be used as a drag reduction material for ships.

The invention provides a fatty acid detection method, which comprises: A) extracting an oil sample to be detected by using a solvent to obtain a liquid to be detected; dissolving the fatty acid mixed standard substance with isooctane to obtain a mixed standard substance solution; b) determining the to-be-determined solution and the mixed standard substance solution by adopting a gas chromatographic method, and qualitatively and / or quantitatively determining the components of the to-be-determined solution by adopting a peak area percentage method according to the chromatogram of the reference substance solution; the gas chromatography conditions are as follows: a chromatographic column is a capillary chromatographic column taking phenyl (50%) methylpolysiloxane as a stationary phase. According to the present invention, the cyanopropyl aryl polysiloxane stationary phase chromatographic column is adopted to replace the SP-2560 polydicyanopropyl siloxane strong polarity stationary phase chromatographic column, and the temperature programming parameter and the split ratio are changed, such that the detection time is substantially shortened, the detection result is more accurate, and the timeliness and the accuracy of the detection result are improved.

The application provides a preparation method of an addition type high-temperature-resistant organic adhesive, which comprises the following steps: S1, mixing end-vinyl dimethyl polysiloxane and 3-glycidyl ether oxypropyl trimethoxysilane to obtain a matrix composition; S2, adding a silicone resin and / or a filler to the matrix composition, and uniformly mixing the same by mechanical stirring and ultrasonic to obtain a uniformly dispersed mixed system; S3, after degassing, adding a crosslinking agent to the mixed system obtained in step S2, uniformly mixing, adding a platinum catalyst, and again degassing, so that the addition type high-temperature-resistant organic silicone adhesive is obtained. The organic adhesive of the application can form a relatively stable three-dimensional crosslinked structure after curing, exhibits adjustable 180° peeling adhesive force and thermal stability, and is suitable for reliable bonding of chip packaging and other electronic devices under high-temperature conditions.

The invention relates to the technical field of chemical analysis and detection, and discloses a method for detecting pivalaldehyde in amamecycline and tosilate thereof by gas chromatography, the gas chromatography is adopted, and the gas chromatography conditions are as follows: a detector is an FID (Flame Ionization Detector), a chromatographic column is a capillary column which takes 5% phenyl-95% methylpolysiloxane as a stationary liquid, temperature programming is adopted, and the detection time is 30 minutes; the initial temperature is 35-45 DEG C, the temperature is maintained for 5 minutes, the temperature is raised to 110 DEG C at the rate of 10 DEG C per minute, then the temperature is raised to 240-280 DEG C at the rate of 40 DEG C per minute, and the temperature is maintained for 5-9 minutes; the invention establishes a simple method capable of detecting pivalaldehyde, so as to detect the levels of pivalaldehyde impurities in the ombalicycline and tosilate thereof, and the method is very important for ensuring the controllability of the product quality.