54 results about "Hydroquinone" patented technology

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.

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 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.

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 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.

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.

Use of a substituted hydroquinone of the structural formula (I). For use as nitrification inhibitor in organic, organomineral and / or inorganic growing media, in particular agricultural, horticultural or forest soils; Preferably, for use as an additive or coating material for organic or inorganic fertilizers, in particular inorganic fertilizers, preferably for nitrogen-containing fertilizers, in particular for ammonium- and / or urea-containing fertilizers, even more preferably for ammonium-containing fertilizers.

The invention discloses ROS / pH double-response drug-loaded gel and a preparation method and application thereof, and belongs to the field of medical materials.The preparation method comprises the steps that sodium hydroxide, 2-mercaptoethanol and an iodomethane ethanol solution are adopted for preparing an intermediate 2-(methylthio) ethanol; the preparation method comprises the following steps: dissolving an intermediate 2-(methylthio) ethanol in dichloromethane, and adding triethylamine, 4-dimethylaminopyridine, methacryloyl chloride and a hydroquinone polymerization inhibitor to obtain a thioether group-containing ROS response monomer methacrylic acid-2-(methylthio) ethyl ester; the preparation method comprises the following steps: dissolving diethylaminoethyl methacrylate, polyethylene glycol methyl ether methacrylate and ethyl alpha-bromoisobutyrate in methylbenzene, and adding CuBr and PMDETA to obtain a pH responsive copolymer; and dissolving the pH responsive copolymer and methacrylic acid-2-(methylthio) ethyl ester in PBS, adding an AMO inhibitor and NT-3, and carrying out chemical crosslinking or photo-crosslinking to obtain the ROS / pH dual-responsive drug-loaded gel. The ROS / pH double-response drug-loaded gel disclosed by the invention is combined with hyperbaric oxygen therapy, so that optimized spinal cord injury repair can be realized.

The present invention relates to an electrolyte composition comprising a lithium salt, and a charge transfer complex formed from a precursor of said charge transfer complex, electron acceptor, and a precursor of said charge transfer complex, electron donor, said lithium salt being (fluorosulfonyl)(trifluoromethanesulfonyl) lithium imidide LiFTFSI, said precursor of said charge transfer complex, electron acceptor, being benzoquinone or one of its derivatives, and said precursor of said charge transfer complex, electron donor, being hydroquinone or one of its derivatives.It also relates to a process for preparing said electrolyte composition, the use of said electrolyte composition in a rechargeable lithium-metal battery or for the preparation of a solid electrolyte for a rechargeable lithium-metal battery, a solid electrolyte for a rechargeable lithium-metal battery comprising said electrolyte composition, and a rechargeable lithium-metal battery comprising said solid electrolyte. Figure to be published: Figure 1.

A multi-part kit system may be used to repair damaged products used in industrial applications, comprising a part A which includes (A1) MDI prepolymer, (A2) fumed silica, and (A3) plasticizer; a part B which includes (B1) hydroquinone di-(2-hydroxyethyl)ether and (B2) plasticizer; and a part C which includes (C1) polyol, (C2) optionally, catalyst, and (C3) optionally, plasticizer.

The present application belongs to the technical field of hydroxycarbazole production separation and purification, and provides a continuous flow production process of hydroxycarbazole, specifically comprising the following steps: (1) mixing raw materials o-halogenated aniline, hydroquinone, an organic solvent and an acid catalyst, and then pumping into a first reactor for reaction; (2) sequentially subjecting the reaction liquid at the outlet of the first-stage reactor to extraction, vacuum distillation, recrystallization and drying treatment to obtain a reaction product photoreaction intermediate; (3) continuously pumping the photoreaction intermediate prepared in step (2) into a second-stage photoreactor together with a solution of a photoreaction catalyst and a second solvent, and performing a photochemical reaction under the irradiation of a UV-LED light source; and (4) sequentially subjecting the reaction liquid at the outlet of the second-stage photoreactor to neutralization, vacuum distillation and recrystallization to obtain a hydroxycarbazole product. The technical scheme of the present application can realize the preparation of a plurality of hydroxycarbazoles with high yield and high purity, and shorten the production cycle.

A method for preparing di-(2-hydroxyisopropyl)benzene, a key intermediate of hydroquinone. The method comprises the following steps: (1) reacting diisopropylbenzene and an oxygen-containing gas in the presence of an alkali and an initiator to obtain a liquid containing solid di-(2-hydroxyisopropyl)benzene; (2) separating and purifying the solid di-(2-hydroxyisopropyl)benzene to obtain a di-(2-hydroxyisopropyl)benzene product with a content >99.95%, wherein the initiator includes one or more of azobisisobutyronitrile, diisopropylbenzene dipperoxide, and diisopropylbenzene peroxide, and the alkali includes sodium hydroxide, potassium hydroxide, or a combination thereof, and the oxidation reaction in step (1) is carried out at a temperature of 80-150°C and a pressure of 0.3-1.8 MPa.

This invention relates to a high-capacity, high-conductivity iron-manganese oxide powder, its preparation method, and its applications. The preparation method comprises the following steps: uniformly mixing MnFe-PBA powder via co-precipitation; ultrasonically dispersing the MnFe-PBA powder in a deionized water-ethanol mixed solution to form uniform MnFe-PBA particles; coating the surface of the MnFe-PBA particles with a layer of hydroquinone-formaldehyde resin via aldol condensation to obtain MnFe-PBA@RF particles; and finally calcining the MnFe-PBA particles at high temperature under an inert atmosphere to obtain Mn2FeO3@C powder. This preparation method allows for large-scale synthesis, and the obtained Mn2FeO3@C powder exhibits high specific capacity and high conductivity when used as a cathode in aqueous zinc-ion batteries.

The present invention relates to the formation of compound (I) by reacting 2,3,6-trimethylhydroquinone or a protected derivative thereof with an unsaturated alcohol of formula (IIIa) or (IIIb) in the presence of Gd(OTf)3 or Tm(OTf)3 or Al(OTf)3 or Y(OTf)3 or Fe(OTf)2 or camphorsulfonic acid or BiCl3 as an acidic catalyst.

The present invention provides novel hydroquinone derivatives of formula (I), processes of preparation, as well as pharmaceutical compositions and methods of treating and / or preventing e.g. autoimmune, immunological, rheumatology, vascular disorders, ophthalmologic disorders, fibrotic disorders, metabolic and gastrointestinal disorders, neuroinflammatory and neurodegenerative diseases, neoplasms and cancer associated disorders, hormone related diseases and immunological disorders resulting from viral and bacterial infectious diseases and complications thereof. wherein R 1 is COOR 4, (CH 2 ) n COOR 4, SO 3 H, (CH 2 ) n SO 3 H or CONH-R 10; one of R 2 and R 3 is H and the other is R 5.

This invention discloses a method and continuous production apparatus for polymerizing polyarylene ether nitrile from 2,6-dichlorobenzonitrile and mixed diphenols, belonging to the field of polymer material synthesis technology. The method includes: mixing 2,6-dichlorobenzonitrile with hydroquinone / bisphenol A at a molar ratio of (0.3~0.7):(0.7~0.3), followed by azeotropic dehydration and step-temperature polycondensation in an alkaline catalyst and organic solvent to obtain a polymer viscous liquid; diluting the viscous liquid and spraying it into a 50%~70% ethanol aqueous solution through a high-pressure nozzle to achieve pressurized spray precipitation; subjecting the precipitated solid to multi-stage hot water washing and continuous vacuum drying using a continuous belt filter to obtain the finished product; recovering the solvent from the mother liquor by distillation; and recycling the wastewater after ultrafiltration membrane treatment. This invention effectively balances the rigidity and solubility of the polymer by controlling the ratio of mixed monomers, and significantly improves the heat and mass transfer efficiency of the high-viscosity system by employing pressurized spray precipitation and continuous washing and drying processes, solving the industry pain points of traditional batch precipitation such as easy agglomeration, high solvent residue, and high water consumption.

The invention discloses a multifunctional fireproof flame-retardant coating for a new energy battery and a preparation method of the multifunctional fireproof flame-retardant coating, and belongs to the field of fireproof flame-retardant coatings. The flame-retardant coating comprises the following raw materials: acrylic copolymer-epoxy hybrid modified resin, 5.5 [mu] m chopped basalt fiber, 50-70 mesh perlite, barium sulfate, calcined kaolin, carbon black, titanium dioxide, an intumescent flame retardant, organic bentonite, fumed silica, a defoaming agent, a dispersing agent, a base material wetting agent, a solvent a and chlorinated paraffin. The acrylic copolymer-epoxy hybrid modified resin is prepared from the following components: epoxy resin, acrylic acid, acrylic acid-2-ethylhexyl ester, isobornyl methacrylate, acrylic acid-2-hydroxypropyl ester, dicumyl peroxide, a catalyst, hydroquinone and a solvent b. The multifunctional fireproof flame-retardant coating for the new energy battery has excellent flame-retardant and heat-insulating properties, and has the properties of medium resistance, weather resistance, salt spray resistance and the like.

Disclosed in certain embodiments herein is a topical formulation including a tyrosine inhibitor, a skin brightener, and a resorcinol compound. The topical formulation does not include hydroquinone to comply with new federal regulations. A delivery system and method of treating hyperpigmentation is also provided.

The invention relates to a preparation method of vitamin E acetate, which comprises the following steps: taking 2, 3, 5-trimethylhydroquinone diacetate and isophytol as basic raw materials, and reacting under the synergistic catalysis of Lewis acid and Bronsted acid to synthesize the vitamin E acetate. According to the preparation method, through proportion coordination of the two acids, namely, the two acids participate in the acid content change based on a substrate in the reaction, the synthesis targets of high reaction selectivity (greater than or equal to 98.5%), low product hydrolysis selectivity (less than or equal to 0.5%) and the like can be achieved.

A kit of nail polish compositions, in particular of photopolymerizable nail polish, capable of being removed with a nail polish remover, comprising a base coat composition, a color coat composition and a top coat composition, wherein each of the base coat, color coat and top coat compositions comprises a pre-dispersion of at least one viscosity modifier in at least one polymerizable agent of acrylate monomer and / or oligomer type, at least one polymer and / or copolymer resin, at least one photoinitiator, and wherein the color coat composition further comprises at least one pigment or dye, characterized in that the base coat composition and the top coat composition may be identical and in that each of the base coat, color coat and top coat compositions is free of 2-hydroxyethyl methacrylate (HEMA) and 11,14-dioxa-2,9-diazaheptadec-16-enoic acid, 4,4,6,16-tetramethyl-10,15-dioxo-2-[(2-methyl-1-oxo-2-propenyl)oxy]ethyl ester (di-HEMA trimethylhexyl dicarbamate) and substantially free of hydroquinone (HQ) and hydroquinone monomethyl ether (MeHQ). The removal does not require an abrasive operation and can be carried out with an acetone-free nail polish remover.

The present invention relates to a mixture comprising at least one substituted hydroquinone monoether and at least one polymerizable compound.

The invention relates to the field of gold-tin alloy electroplating, and discloses a gold-tin alloy electroplating solution, an electroplating method and a product. The electroplating liquid comprises a stabilizing agent, and the content of the stabilizing agent is 0.01-50 g / L; the stabilizer comprises a first stabilizer and a second stabilizer; the mass ratio of the first stabilizer to the second stabilizer is (1-10): 1; the first stabilizer comprises at least one of an ethylenediamine alkyl substituent, an ethylenediamine phenyl substituent and an ethylenediamine alkyl hydroxyl substituent; the second stabilizer is prepared from at least one of antipyrine, diantipyrine, ascorbic acid, pyrogallol, hydroquinone, phloroglucinol, trihydroxy benzene, catechol, cresol sulfonic acid, catechol sulfonic acid and hydroquinone sulfonic acid. The electroplating liquid can form an alloy composition of a stable electroplated layer in a wide current density range.