106 results about "Hydroquinone" patented technology

The invention relates to the technical field of silicone rubber, in particular to high-temperature-resistant flame-retardant silicone rubber, a preparation method thereof and a cable, the high-temperature-resistant flame-retardant silicone rubber comprises a gradient layer material composed of a surface layer material, a transition layer material and a core layer material, and the surface layer material comprises methyl vinyl silicone rubber, superfine furnace black, calcium stannate, polyacrylonitrile aerogel and a flame-retardant premix; the transition layer material comprises methyl vinyl silicone rubber, superfine furnace carbon black, spandex fibers, polyarylester, calcium stannate and a flame-retardant premix; the core layer material is prepared from methyl vinyl silicone rubber, superfine furnace black, aramid fiber, polyarylester, phthalonitrile resin and 2-mercaptobenzothiazole zinc salt; wherein the flame-retardant premix is prepared from hydroquinone bis (diphenyl) phosphate, phenyl ethyl aluminum phosphinate and zinc hypophosphite according to the weight ratio of (6 to 10): (2 to 4): (1 to 3); the problems that an existing material is prone to aging in an extreme environment, the flame retardant effect is poor, and the mechanical property is degraded are effectively solved.

The present invention relates to urease inhibitor compositions containing tert-butylhydroquinone and optionally an additive component to enhance the inhibitory properties of tert-butylhydroquinone. Further described are uses of these compositions in agriculture to increase nutrient uptake and inhibit urease enzyme activity.

The present invention relates to the mono-saponification of diesters of 2,3,5-trimethylhydroquinone by a base allowing an advantageous synthesis of esterified alpha-tocopherol. The mono-saponification has been demonstrated to occur very selectively at very high yield.

The invention provides a block copolymer toughening-based polyether-ether-ketone material and a preparation method thereof, and relates to the technical field of high polymer materials, the method is characterized in that a block copolymer PAEK-B with a specific sequence structure is synthesized by accurately controlling a ternary block copolymerization reaction of hydroquinone, 4, 4 '-difluorobenzophenone and biphenol, and the block copolymer PAEK-B with a specific sequence structure is obtained. And then the mixture is subjected to melt blending with PEEK, so that the toughness of the PEEK is effectively improved, the mechanical property is improved, and meanwhile, the original processing temperature is kept unchanged.

The invention provides an acrylic polyurethane coating and a preparation method thereof, and belongs to the technical field of coating compositions.The preparation method comprises the following steps that hexylpolyurethane based on non-isocyanate sorbitol, methacrylic anhydride, p-toluenesulfonic acid and hydroquinone monomethyl ether are mixed and heated for a reaction, ethyl acetate is added for mixing, washing, drying, filtering and vacuum concentration are performed, and the acrylic polyurethane coating is obtained. The bio-based polyurethane acrylate is obtained; the preparation method comprises the following steps: mixing ZG nanoparticles, methylbenzene, 3-(methacryloyloxy) propyltrimethoxysilane and hydroquinone monomethyl ether, heating, stirring, centrifuging and washing to obtain functionalized ZG; and fully mixing the bio-based polyurethane acrylate, the photoinitiator, the acrylate-based single-terminated reactive polysiloxane, the reactive diluent and the functionalized ZG to obtain the acrylic polyurethane coating. The coating can improve the curing speed, and has hydrophobic and oleophobic properties and corrosion resistance at the same time.

Provided is a styrene-based resin composition that has excellent hue and transparency. The styrene-based resin composition according to the present invention contains a styrene-based resin (A) and a component (B). The styrene-based resin (A) is a copolymer including a styrene-based monomer unit (a1) and a (meth)acrylic acid-based monomer unit (a2). The component (B) includes 4-methoxyphenol or hydroquinone. A specific amount of the component (B) is included.

The invention provides a production method of 2, 3, 5-trimethylhydroquinone diester, which comprises the following steps: carrying out rearrangement reaction on 2, 6, 6-trimethyl-cyclohexyl-2-ene-1, 4-diketone and an acylating agent in a tubular reactor filled with a catalyst to obtain the 2, 3, 5-trimethylhydroquinone diester, all reaction parameters in the tubes of the tubular reactor meet the relationship shown in the formula 1. The production method has the advantages of high production efficiency, small corrosion to equipment and simple subsequent treatment process, and is suitable for wide popularization and application.

A use of a compound as shown in structural formula I or a hydroquinone form, (C1-C4) quinone form, stereoisomer, hydrate, deuterated product, ester, solvate, metabolite, and pharmaceutically acceptable salt or prodrug thereof in preparation of a drug for treating bacterial metabolism-related diseases.

The invention discloses a surface strengthening treatment method for an inner hole of a main connecting rod of a piston type aero-engine. The surface strengthening treatment method comprises the following steps that S100, the main connecting rod is subjected to oil removal treatment; s200, performing waxing treatment on the non-plated surface on the main connecting rod to form an insulating protection layer; s300, weak corrosion activation treatment is conducted on an inner hole of the main connecting rod; s400, a tool clamp is used for installing and hanging the main connecting rod, then a lead and tin plating solution is poured into an inner hole of the main connecting rod for out-groove electroplating treatment, and the lead and tin plating solution comprises 110 g / L to 275 g / L of lead fluoroborate, 30 g / L to 65 g / L of stannous fluoroborate, 1 g / L to 2 g / L of hydroquinone and 1.5 g / L to 2.0 g / L of oxhide gelatin; and S500, the main connecting rod is detached from the tool clamp and then subjected to wax removal and cleaning treatment, and then whether the lead-tin layer is qualified or not is checked. According to the surface strengthening treatment method for the inner hole of the main connecting rod of the piston type aero-engine, the uniformity of a plating layer can be improved, the tin content in a lead-tin layer is increased, and the wear-resisting and lubricating capacity is enhanced.

The application discloses an efficient treatment method of industrial waste salt, comprising the following steps: mixing the industrial waste salt with a certain proportion of functional particles, and performing microwave treatment; wherein the functional particles are composed of first functional particles and second functional particles; the first functional particles are selected from one or more of silicon carbide, diiron trioxide, titanium dioxide and zinc oxide; and the second functional particles are selected from one or more of 2,6-di-tert-butyl-p-cresol, hydroquinone, tert-butyl catechol and copper naphthenate. The functional particles used in the application have multiple functions such as microwave absorption, reaction catalysis, polymerization inhibition and antioxidation, etc. When the functional particles are mixed with the industrial waste salt and subjected to microwave irradiation, the organic and inorganic small molecules can be catalyzed to crack and generate gaseous small molecules, and meanwhile, the organic matters in the industrial waste salt can be prevented from polymerization, so that the increase of the content of organic polymers in the waste salt is avoided.

The application discloses a preparation method of monocyamine solution and belongs to the technical field of fine chemical industry. By optimizing the process conditions, especially adding new stabilizers of o-benzoquinone, 1,4-naphthoquinone and methylhydroquinone, the content of dicyandiamide in the monocyamine solution is reduced, and high-quality monocyamine with a concentration of 30% is produced at a lower temperature. The fine control technology of monocyamine low-temperature hydrolysis reaction developed by the application changes the prior art method, i.e. first hydrolyzing lime nitrogen in a hydrolysis kettle to produce monocyamine aqueous solution with a concentration of 18%, then concentrating through an evaporation system, and finally producing monocyamine finished product with a concentration of 30%. The application improves the product quality and reduces the product energy consumption through the "low-temperature one-step hydrolysis method" monocyamine production process without evaporation and concentration, so that the stable and green low-carbon production of high-grade monocyamine products is realized.

The invention relates to a photoresist material monomer, in particular to a preparation method of a benzenediol ester photoresist material monomer. The preparation method of the benzenediol acid ester photoresist material monomer comprises the following steps: taking benzenediol as a raw material, adding an alkaline reagent into a polar solvent under a low-temperature condition, dropwise adding an anhydride compound shown in a formula II in a temperature-controlled manner, and then carrying out a temperature-controlled reaction to obtain a benzenediol monoacrylate compound shown in a formula I. The invention also discloses a preparation method of the benzenediol acid ester photoresist material monomer. According to the invention, benzenediol and an anhydride compound are taken as raw materials, and the target benzenediol acid ester photoresist material monomer can be obtained with high selectivity and high yield through temperature control reaction in the presence of a polar solvent and under the condition of alkalescence.

The application discloses a kind of saturated polyester copolymer and its preparation method and application, belong to polymer material technical field.The preparation raw material of saturated polyester copolymer provided by the application includes: compound a, compound b, compound c, polyol, catalyst;Still include polyacid and / or polyacid anhydride;Compound a is compound b is compound c is The structure component of carbon ring common carbon atom is introduced in saturated polyester copolymer in the application, i.e.compound a and compound b, can realize the more orderly distribution of space group in chain segment, not only the adhesion of various substrates is significantly improved, and coating shrinkage is significantly reduced, in addition, hydroquinone or similar hydroquinone structure is also introduced simultaneously, effectively improve the heat resistance of polyester chain segment, and the saturated polyester copolymer of the application is used to prepare in-mold injection decorating ink, can effectively meet the performance requirements of in-mold injection process.

The invention provides a method for detecting hydroquinone and resorcinol in catechol, which adopts a high performance liquid chromatography detection method and comprises the following steps: (1) preparing a test solution, a catechol reference solution and a system applicability solution by adopting a diluent; the diluent adopts 0.2% acetic acid solution-methanol in a volume ratio of 75: 25; (2) taking octadecyl silane bonded silica gel as a filling agent; a mobile phase A is a 0.2% acetic acid solution, a mobile phase B is methanol, and gradient elution is carried out; and (3) respectively injecting the catechol reference substance solution, the system applicability solution and the test solution into a liquid chromatograph, and calculating the content of each component. The method can realize quantitative and accurate detection of hydroquinone and resorcinol in catechol, is convenient to operate and high in separation degree, and has important practical significance and application value for improving the quality control level of catechol, guaranteeing the safety of raw material medicines prepared by taking catechol as a starting material and the like.

The present application relates to a kind of short process technology for manufacturing high-performance phosphor copper ball by waste copper, belong to non-ferrous metal processing technical field.Waste copper is sorted, broken, soaked, paint removal, impurity removal and then added to medium-frequency induction melting furnace, and refining agent is added for refining;Phosphor copper alloy is slowly added to the copper liquid after refining;After adding phosphor copper alloy, the copper liquid is introduced into the upper continuous casting equipment, and the copper liquid is cooled and solidified in crystallizer, and phosphor copper ball blank is directly drawn;Phosphor copper ball blank is placed in annealing furnace, and annealing is carried out;Then it is cooled by polyetheramine-bisphenol A epoxy cooling liquid;Mechanical polishing, ultrasonic cleaning obtain high-performance phosphor copper ball;Polyetheramine-bisphenol A epoxy cooling liquid is prepared by polyetheramine, bisphenol A epoxy resin, ethylene glycol butyl ether, 2,5-dimercapto hydroquinone, dibutyl tin dilaurate, deionized water, triethylamine, graphene microsheet;Phosphor copper ball has high hardness and electrical conductivity, and is a kind of high-performance phosphor copper ball.

The present invention relates to lignin comprising beta-O-4'units bound in position to one or more compounds of formula (I), such as phenol, catechol, resorcinol, hydroquinone, pyrogallol and / or guaiacol, a process for its preparation and its use. And lignin fragment 1.

According to the method for preparing the battery-grade iron phosphate through magnetite and reduction leaching, hydroquinone and ascorbic acid are added into the leaching agent phosphoric acid aqueous solution to serve as a reducing agent together, on one hand, hydroquinone and ascorbic acid have high reducibility, and the phenomenon that the iron source is damaged at the moment when the iron source makes contact with the leaching agent can be avoided; fe < 2 + > released by the magnetite is oxidized into Fe < 3 + > by residual oxygen in the liquid phase, and the reaction path of oxidizing Fe < 2 + > into Fe < 3 + > in the liquid phase is thoroughly blocked, so that the reaction of the elemental iron and the target Fe < 3 + > is promoted; and on the other hand, under the acidic condition, hydroquinone and ascorbic acid can form complexes [Fe (C6H4 (OH) 2)] < 2 + > and [Fe (C6H7O6)] < 2 + > with Fe < 2 + > in a leaching system respectively, the concentration of Fe < 2 + > in a liquid phase is reduced, reaction balance forward movement of ferrous ions released by magnetite is promoted, and the leaching rate of the iron element is greatly increased.

The present invention relates to a process for producing hydrogen peroxide by the AO process, comprising the two alternating steps of: hydrogenation of a working solution in the presence of a catalyst, said working solution containing at least one quinone dissolved in at least one organic solvent, in order to obtain at least one corresponding hydroquinone; and oxidation of said at least one hydroquinone;the solvent corresponding to formula (I) below:in which n is an integer greater than or equal to 8.

The present invention provides a method for storing and utilizing oxygen gas using an organic clathrate, the method comprising: a first step of pulverizing hydroquinone; a second step of injecting the pulverized hydroquinone into a reaction cell at a pressure of 70-200 bar and degassing residual gas; a third step of injecting concentrated oxygen gas into the degassed cell; a fourth step of allowing the oxygen-injected cell to stand for 7-12 days so as to saturate the reaction; a fifth step of recovering the hydroquinone saturated with oxygen gas and pelletizing same; and a sixth step of heating the pelletized hydroquinone to 313-393 K. According to the present invention, the method is a novel method for storing oxygen gas in a solid form under room-temperature and atmospheric-pressure conditions using an organic clathrate, and can be used in various fields.

The invention relates to the technical field of polyester fiber synthesis, in particular to a high-elastic polyester fiber and a preparation method and application thereof. The problem that in the prior art, the mechanical property and the elastic property of polyester fibers cannot be considered at the same time is solved. According to the fiber obtained by the invention, a sheath layer is obtained by combining isophthalic acid, polycaprolactone glycol, modified nano silicon dioxide and ultra-high molecular weight polysiloxane; the core layer is prepared from modified nano silicon dioxide, trimethylolpropane triacrylate and hydroquinone; the structural uniformity of a polymer is controlled through step-by-step esterification and polycondensation, a stable fiber structure is formed through eccentric core-sheath spinning, trimethylolpropane triacrylate is initiated to be crosslinked by combining electron beam irradiation, and heat treatment is performed to prepare the composite material. The obtained polyester fiber has high tensile strength and high elongation at break, shows excellent elastic recovery rate, and is suitable for fillers of home textile products, clothes and furniture.

The present invention relates to a curable rubber composition comprising at least one halobutyl rubber, at least one curing agent, which is suitable for curing the at least one halobutyl rubber and which comprises at least one of sulfur, amines, phenolic resins, hydroquinones and peroxides, and at least one lignin-based filler F1, which is different from carbon black, and which has an STSA surface area of up to 200 m² / g, wherein the curable rubber composition comprises no or less than 0.45 phr 2,2'- dibenzothiazolyl disulfide (MBTS), and wherein the total amount of any organic constituents of the curable rubber composition, which are suitable to retard the t90 curing time, including 2,2'-dibenzothiazolyl disulfide, and which are different from the at least one curing agent and the at least one halobutyl rubber and the at least one lignin-based filler F1, is less than 1.85 phr, a kit-of-parts comprising the rubber composition in spatially separated form, a cured rubber composition obtainable from said curable rubber composition, a use of the aforementioned compositions for manufacturing articles, parts and / or components, thereby obtained articles, parts and / or components, and a process for preparing said article, part and / or component.

This invention relates to the field of reinforcement materials technology, specifically to reactive low-temperature reinforcement materials for mining, their preparation methods, and applications. The reactive low-temperature reinforcement material for mining comprises component A and component B. Component A consists of polyester polyol, polyether polyol, silane coupling agent, and catalyst; component B consists of prepolymer and additives. The prepolymer is obtained by reacting polyether polyol b with polymethylene polyphenyl polyisocyanate. Polyether polyol b has a functionality of 3.1 and a hydroxyl value of 207 mg KOH / g, and is a polyether polyol polymerized with propylene oxide using maltitol, trimethylolpropane, hydroquinone, and triethylene glycol as initiators. The material prepared by this invention is primarily reactive in structure and flame-retardant, avoiding the impact of adding large amounts of additive flame retardants on material strength. The resulting material exhibits high compressive strength, low internal heat of reaction, and good flame-retardant properties.

The invention discloses medical silicone gel for scar repair and a preparation method and application thereof, and relates to the technical field of medical gel. The aloe polysaccharide silicone gel mask comprises the following raw materials in percentage by mass: 25-45% of aloe polysaccharide silicone gel, 1-2% of sodium hyaluronate, 0.2-0.8% of poly-L-lactic acid, 2-4% of vitamin E, 5-8% of asiaticoside, 1-3% of resveratrol, 1-2% of curcumin, 1-2% of hydroquinone, 2-4% of arbutin, 2-4% of a vitamin C derivative, 3-5% of a traditional Chinese medicine composition, 0.5-1.5% of an odor regulator, 0.1-0.3% of a preservative and the balance of water. And the balance of purified water. The smell regulator is a pH response release type adsorbent. The medical silicone gel not only can effectively repair scars, but also is good in skin feeling and not prone to sensitivity.

This invention discloses a high-temperature and low-temperature resistant plastic film and its preparation method, relating to the field of polymer materials. In preparing the high-temperature and low-temperature resistant plastic film, bis(4-fluorophenyl)phosphine oxide is reacted sequentially with acrylonitrile, hydroquinone with 4,4'-difluorobenzophenone, 2,4-dihydroxybenzonitrile, N-(2-aminopropyl)maleimide, and furfuryl isocyanate to obtain functionalized polyetheretherketone (PEEK). Glass fibers are then reacted sequentially with N-(3-trimethoxysilylpropyl)pyrrole, 1-allyl-1H-pyrrole with 1-methylpyrrole, N-(furan-2-ylmethyl)ethylamine, and 1,3-propanesulfonic acid lactone to obtain functionalized glass fibers. The functionalized glass fibers and functionalized PEEK are mixed, coated onto a polytetrafluoroethylene (PTFE) plate, and scraped off to obtain the high-temperature and low-temperature resistant plastic film. The high-temperature and low-temperature resistant plastic film prepared by this invention possesses durability, antibacterial properties, self-healing properties, antistatic properties, and flame retardant properties.

The invention discloses a preparation method of vitamin E acetate, which comprises the following steps: taking 2, 3, 5-trimethylhydroquinone diester and isophytol as raw materials, and carrying out catalytic reaction in Lewis acid and a catalytic promoter to synthesize the vitamin E acetate. According to the preparation method, aqueous hydrochloric acid is avoided from being used by adding a catalyst aid, the vitamin E acetate can be prepared in one step through reaction, meanwhile, the content of key impurities A and B can be obviously reduced, and the content of product impurities A + B is low.

The invention belongs to the technical field, and particularly relates to a plant extract composition with a whitening effect and a preparation method thereof. The composition provided by the invention takes natural plants and bioactive components as cores, avoids the use of chemical whitening agents with potential toxicity, such as hydroquinone, mercury salt and the like, and is high in safety and low in irritation. All the components cooperate with one another in a reasonable proportion, so that melanin generation can be inhibited from the source, and metabolism of generated melanin can be promoted; according to the present invention, the whitening effect is improved, the multiple skin care functions such as moisturizing, anti-aging, repairing and the like are further considered, and the mask is suitable for various skin types, and is especially suitable for people with dark skin color, hyperpigmentation, dryness, water shortage and mild sensitive skin.

The invention relates to the technical field of slow-release fertilizer additives, and discloses preparation and application of a stable slow-release slow-release fertilizer additive. The stable slow-release slow-release fertilizer additive is prepared from the following raw materials: 25 to 35 parts of sodium lignin sulfonate, 21 to 31 parts of carboxymethyl cellulose sodium, 11 to 21 parts of dicyandiamide, 3 to 8 parts of hydroquinone, 3 to 7 parts of cellulase, 8 to 15 parts of tetrahydroxy imidazoline, 3 to 8 parts of hydroxamic acid acetate, 3 to 8 parts of ammonium thiosulfate, 0.5 to 3 parts of an auxiliary additive, 1 to 8 parts of a synergist and 1 to 5 parts of a trace element agent. According to the scheme, the sodium lignin sulfonate and the carboxymethyl cellulose sodium are used as main frameworks to replace a large amount of petroleum-based resin, the raw material cost is reduced, the biodegradation rate is increased, the sodium lignin sulfonate and the carboxymethyl cellulose sodium form a three-dimensional network structure, and the slow release and biodegradability are achieved.

This disclosure provides therapeutic compositions (i.e., therapeutic agents) and methods for preventing or treating Friedrich's ataxia in mammalian subjects, reducing risk factors, signs and / or symptoms associated with Friedrich's ataxia (such as complex I deficiency), and / or decreasing the likelihood or severity of Friedrich's ataxia. This disclosure also provides novel intermediates for producing said therapeutic compositions and related reduced forms of said therapeutic compositions, which can also be used as therapeutic agents (or prodrugs of one or more therapeutic agents).

To provide a hydroquinone-containing external skin preparation, which is effective in preventing the oxidation of hydroquinone, and a method for producing the a hydroquinone-containing external skin preparation.SOLUTION: A hydroquinone-containing external skin preparation contains (A) hydroquinone, (B) polyhydric alcohol, (C) water-swellable clay mineral, (D) oil-based component, (E) stabilizer, and (F) water. A method for producing a hydroquinone-containing external skin preparation includes dissolving hydroquinone in water having polyhydric alcohol, water-swellable clay mineral and stabilizer to prepare an aqueous hydroquinone solution, and mixing the aqueous hydroquinone solution with oil-based component.SELECTED DRAWING: Figure 1

The invention provides an aluminum electrolytic capacitor and a preparation method and application thereof. The aluminum electrolytic capacitor comprises a shell with an opening and a core, a guide pin is arranged on the core, a rubber plug is arranged at the opening of the shell, the core penetrates through the rubber plug and is accommodated in the shell, and a sleeve is arranged outside the shell; the core comprises a cathode aluminum foil, an anode aluminum foil, inner-layer electrolytic paper and outer-layer electrolytic paper; the guide pins comprise a cathode guide pin and an anode guide pin; the cathode aluminum foil is provided with a cathode guide pin, the anode aluminum foil is provided with an anode guide pin, and the inner-layer electrolytic paper and the outer-layer electrolytic paper are coated with electrolyte; the electrolyte comprises the following components in percentage by weight: 60%-70% of ethylene glycol, 20%-30% of gamma-butyrolactone, 1%-5% of dimethylformamide, 5%-10% of ammonium adipate, 3%-5% of ammonium sebacate, 1%-2% of boric acid, 0.5%-1% of ammonium dihydrogen phosphate, 0.1%-0.3% of nitrobenzoic acid, 0.05%-0.1% of ammonium molybdate, 0.2%-0.5% of polyvinylpyrrolidone and 0.05%-0.1% of hydroquinone; the aluminum electrolytic capacitor can still work normally for a long time at the ultralow temperature of 450V and the temperature of-55 DEG C, the low-temperature capacity attenuation at the temperature of-55 DEG C can be as low as-14.50%, and the low-temperature impedance ratio at the temperature of-55 DEG C can reach 1.28.