18 results about "P-hydroxyanisole" patented technology

The invention discloses a UV (ultraviolet)-heat dual-curing waterborne polyurethane emulsion and a preparation method thereof. According to the UV-thermal dual-curing waterborne polyurethane emulsion, the heat resistance, the water resistance and the mechanical property of UV-WPUA can be improved, and meanwhile, the storage stability and the yellowing problem of the UV-WPUA can be improved; the polyurethane foam is prepared from the following components in parts by weight: 60-70 parts of binary isocyanate; 35 to 45 parts of polypropylene carbonate; 0 to 12 parts of 1, 4-butanediol; 50 to 55 parts of an acrylate monomer; 0.1 to 0.2 part of p-hydroxyanisole; 0 to 18 parts of sulfydryl silane; 0.1 to 0.3 part of an organic tin catalyst; 5-10 parts of a solvent; 100 to 150 parts of deionized water; belongs to the technical field of coatings.

The invention provides a preparation method of methacrylic acid 2-butoxyethyl ester, and belongs to the technical field of organic synthesis. According to the invention, p-hydroxyanisole (MEHQ) and 2, 2, 6, 6-tetramethylpiperidine oxide (TEMPO) are used as polymerization inhibitors at the same time, and the dual polymerization inhibitors are synergistically used, so that the auto-polymerization of methyl methacrylate (MMA) and 2-butoxyethyl methacrylate is reduced, and the conversion rate is increased.

The invention belongs to the technical field of electrolysis, and discloses a method for preparing p-hydroxyanisole through electrolytic oxidation of anisole. The method comprises the following steps: S1, adding anisole, an acylation reagent, an organic alkali proton trapping agent and an alkaline amine group-containing solvent into a single-chamber electrolytic bath together, starting electrification, carrying out electrolysis, and obtaining a product liquid containing p-methoxytrifluoroacetic acid phenyl ester in the single-chamber electrolytic bath after electrolysis is finished; the organic base proton trapping agent is at least one of N, N-diisopropylethylamine, tributylamine and tripropylamine; and S2, adding a saturated sodium bicarbonate aqueous solution into the product liquid containing p-methoxytrifluoroacetic acid phenyl ester in the step S1 to hydrolyze p-methoxytrifluoroacetic acid phenyl ester, and extracting to obtain p-hydroxyanisole. The selectivity of para-position and ortho-position products of methoxyl on anisole is regulated and controlled, so that the selectivity of p-hydroxyanisole prepared by the method is higher.

This application relates to an outdoor low-temperature lithium-ion battery, comprising a negative electrode material, a positive electrode material, an electrolyte, and a separator. The electrolyte includes a lithium salt, a solvent, and additives. The lithium salt is a fluorinated lithium salt, the solvent is a combination of acetate and carbonate, and the additives are tetraethyl orthosilicate and p-hydroxyanisole. By introducing tetraethyl orthosilicate and p-hydroxyanisole into the electrolyte, this application can dilute the electrolyte at low temperatures and prevent liquefaction of some components at higher temperatures. Furthermore, tetraethyl orthosilicate can prevent the generation of HF from the fluorinated lithium salt, thus protecting the battery performance. P-hydroxyanisole has antioxidant properties and can inhibit the dissolution of positive electrode metal ions at low temperatures, thereby protecting the positive electrode.

The invention relates to a synthesis process for co-production of p-hydroxyanisole and o-hydroxyanisole, anisole and hydrogen peroxide are used as raw materials, and under the action of a catalyst and an auxiliary agent, the content of p-hydroxyanisole and o-hydroxyanisole can be adjusted. The additive is prepared by taking benzothiophene as a raw material through alkyl ether, ethynylation and ring closing reaction, has certain solvent effect and limiting effect, and can change the proportion of p-hydroxyanisole to o-hydroxyanisole in a product.

The invention discloses a polymerization inhibitor for printing ink, the printing ink and application of the printing ink. Relates to the field of ink polymerization inhibitors. The component of the polymerization inhibitor for the printing ink comprises p-hydroxyanisole, and the printing ink is selected from azo dye type printing ink or mixed printing ink of anthraquinone dye and azo dye. According to the polymerization inhibitor disclosed by the invention, p-hydroxyanisole is added into azo dye type ink or anthraquinone-azo mixed type ink as an active component, so that the reflux performance of an electrowetting display device after light aging can be remarkably improved.

The present application relates to a kind of stable chlorpyrifos technical and the application of stabilizer, the content of chlorpyrifos in the chlorpyrifos technical is 92.0-99.5%, chlorpyrifos technical contains stabilizer, stabilizer is p-hydroxyanisole, beta-propionolactone, or the composition consisting of p-hydroxyanisole and beta-propionolactone, wherein the mass content of stabilizer in chlorpyrifos technical is 0.05 ‰-5.0 ‰.The present application uses p-hydroxyanisole, beta-propionolactone or the composition consisting of p-hydroxyanisole and beta-propionolactone as the stabilizer of chlorpyrifos technical solves the stability problem of chlorpyrifos technical, especially can effectively reduce the decomposition of active ingredient in chlorpyrifos technical.

The invention discloses fragrant printing ink and a preparation method thereof, the fragrant printing ink comprises a diluent, a diluent and fragrant powder, the diluent comprises an acrylate substance, acryloylmorpholine, 2-hydroxy-2-methyl-1-[4-(2-hydroxyethoxy) phenyl]-1-acetone and 2, 4, 6-trimethylbenzoyl-di (p-tolyl) phosphine oxide, the diluent comprises a diluent solvent, a diluent solvent and a solvent solvent, and the diluent solvent comprises a diluent solvent, a diluent solvent and a solvent solvent. The diluent comprises an acrylic ester substance, a printing ink adhesive, a phosphate ester substance and p-hydroxyanisole; the acrylic ester substances in the diluent comprise the acrylic ester substances in the diluent. According to the fragrant ink disclosed by the invention, the diluent and the diluent share an acrylate substance as a basic component, so that the two key assistants can be better fused in an ink system through the design, the rejection reaction among different components is reduced, the problems of layering, precipitation, uneven gloss and the like are avoided, and the overall stability of the ink is guaranteed; and meanwhile, the component debugging difficulty in the production process is also simplified.

This invention discloses a reverse demulsifier for oilfield produced fluid treatment, prepared using the following steps: N-(3-dimethylaminopropyl)methacrylamide, methyl chloroacetate, and the polymerization inhibitor p-hydroxyanisole are added to a solvent and reacted at a constant temperature for 10 hours. After cooling, dimethylaminopropylamine is added dropwise and reacted at room temperature for 1 hour. Then, p-hydroxyanisole is added and the reaction is heated for 4 hours. Next, etherifying agent Quat-188 with an effective content of 65% is added and the reaction is heated for 10 hours. After removing the solvent, a high cationic density monomer is obtained. Then, the high cationic density monomer and 2-(dodecyltrithiocarbonate)-2-methylpropionic acid are dissolved in anhydrous ethanol and an initiator and reacted at a constant temperature and with stirring for 3 hours. Then, acrylate monomers are added, nitrogen is purged to remove oxygen, an initiator is added, and the reaction is heated for 3 hours to obtain the product. The reverse demulsifier for oilfield produced fluid treatment proposed in this invention has a stronger ability to neutralize the negative charge of oil droplets and can be applied to the demulsification treatment of high-concentration oily wastewater under more severe conditions.

The invention provides a preparation method of methacryloyloxypropyltriacetoxysilane, and relates to the field of organic silicon synthesis, the preparation method comprises the following steps: adding a solvent, sodium acetate and a first polymerization inhibitor into a reaction container; under the protection of inert gas, dropwise adding methacryloyloxypropyl trichlorosilane and a second polymerization inhibitor; after dropwise adding is completed, continuously reacting for a period of time, filtering to remove solid salt, and distilling to remove the solvent to obtain a finished product methacryloyloxypropyltriacetoxysilane; according to the method, sodium acetate and methacryloyloxypropyltrichlorosilane are taken as raw materials, two polymerization inhibitors, namely p-hydroxyanisole and 2, 6-di-tert-butyl p-cresol, are compounded for use, a specific polymerization inhibitor adding sequence is adopted, and methacryloyloxypropyltriacetoxysilane can be synthesized under the condition that a catalyst is not used.

The invention belongs to the technical field of resin, and particularly relates to a synthetic method and application of modified hydrogenated bisphenol A type epoxy acrylate high-weather-resistance resin. Hydrogenated bisphenol A epoxy resin, acrylic acid, p-hydroxyanisole, 2, 6-butylated hydroxytoluene and triethylamine are put into a reaction kettle, stirring is started, the temperature is slowly increased, timing is started when the temperature reaches, reaction heat release, temperature control reaction and sampling are carried out to test the acid value, after the acid value is qualified, cooling is carried out, a reagent is added, uniform stirring is carried out, cooling, discharging, filtering and packaging are carried out, and the synthetic resin is obtained. The synthetic resin can be applied to a product, and the preparation method of the product comprises the following steps: mixing the synthetic resin, an initiator, glass fiber cloth, a flatting agent and a light stabilizer to obtain a mixture, and performing hot-pressing curing to obtain the product. According to the invention, the technical problem that the epoxy resin is easy to yellow and age in outdoor application is fundamentally solved.

The invention discloses silane modified low-shrinkage low-ash-content photosensitive resin as well as a preparation method and application thereof. The silane modified low-shrinkage low-ash-content photosensitive resin is prepared from 40 to 70 weight percent of prepolymer, 30 to 50 weight percent of reactive diluent, 1 to 5 weight percent of photoinitiator, 0.5 to 1.5 weight percent of silane coupling agent and 0.1 to 0.3 weight percent of p-hydroxyanisole, the silane modified low-shrinkage low-ash-content photosensitive resin forms an organic polymer network through photocuring; the silane coupling agent is subjected to ultraviolet post-curing to generate a Si-O-Si inorganic network in situ; the organic polymer network and the Si-O-Si inorganic network form an organic-inorganic interpenetrating network. Through the organic-inorganic interpenetrating network structure design, the photosensitive resin can effectively solve the problem that low shrinkage, low ash content and high strength of the existing SLA casting resin are difficult to consider at the same time. The preparation process is simple and convenient, and after SLA printing and ultraviolet post-curing treatment, a fired mold meeting the high-end precision casting requirement can be prepared, so that the casting quality and the production efficiency are improved.

The invention discloses a low-odor unsaturated polyester resin and a preparation method thereof, and the low-odor unsaturated polyester resin comprises the following components in parts by weight: 45-55 parts of an unsaturated polyester resin base polymer, 10-30 parts of low-viscosity resin, 1-5 parts of a diluent monomer styrene or 10-30 parts of an acrylate active diluent monomer, 0.5-0.7 part of a polymerization inhibitor p-hydroxyanisole, 0.4-0.6 part of an accelerant and 1-2 parts of an initiator, wherein the low-viscosity resin is selected from at least one of amino acrylate resin or polyester acrylate resin. The method has the advantages that by introducing the low-viscosity resin, the use amount and volatilization of styrene can be reduced, and the mechanical property of the resin can be maintained or improved.

The invention belongs to the technical field of drug intermediates, and discloses a method for preparing p-hydroxyanisole with high selectivity. The method comprises the following steps: heating anisole and a TS-1 molecular sieve to a first temperature, and then adding first hydrogen peroxide to carry out a first-stage reaction; raising the temperature to a second temperature after the first-stage reaction is finished, adding second hydrogen peroxide to carry out a second-stage reaction, and carrying out post-treatment after the reaction is finished. The p-hydroxyanisole is synthesized with high selectivity by taking anisole as a raw material, a TS-1 molecular sieve as a catalyst, hydrogen peroxide as an oxidizing agent and water as a solvent in a manner of changing temperature gradient and feeding in batches, and the unconverted raw material anisole and the catalyst are recycled through a separation process and are reused.

The application discloses a wear-resistant and flame-retardant cloth wire and a preparation method thereof, and relates to the technical field of power cables. The application comprises a copper conductor and an insulation layer. The insulation layer is made of mixing materials, and the mixing materials comprise the following raw materials in mass parts: 1000-1100g parts of wear-resistant and toughening masterbatch, 3-3.4 parts of p-hydroxyanisole, 160-175 parts of flame-retardant crosslinking agent, 12-13 parts of photoinitiator 184, and 12-13 parts of benzophenone. The wear-resistant and toughening masterbatch comprises the following raw materials: high-density polyethylene resin, antioxidant 1010, antioxidant 168, dilauryl thiodipropionate, synergistic microspheres, crosslinking aid, and hydroxymethylpropane trimethyl acrylate. In the application, the introduction of the flame-retardant crosslinking agent, the synergistic microspheres and other raw materials effectively improves the flame retardance, wear resistance, crack resistance and low-temperature resistance of the crosslinked polyethylene-based insulation layer. Therefore, the application has a more extensive application prospect.

The invention relates to a continuous preparation process of a styrene green polymerization inhibitor. The continuous preparation process comprises the following steps: continuously conveying 2, 6-di-tert-butylphenol, furfural and a catalyst to a continuous reaction kettle through a DCS (Distributed Control System) linked metering pump, controlling the reflux temperature and the material retention time, and carrying out continuous water separation and rectification to obtain a green polymerization inhibition intermediate; continuously compounding ethylbenzene, the green polymerization inhibition intermediate, the green retarder QM and p-hydroxyanisole, and automatically packaging after the product is detected to be qualified on line. According to the process, a continuous reaction kettle and a continuous blending kettle are combined with DCS / SIS linkage control. The polymerization inhibitor is excellent in polymerization inhibition performance, high in process stability, simple in process, free of special harsh equipment, easy to industrially popularize, low in unit energy consumption and capable of meeting the green and environment-friendly requirements.

The invention belongs to the technical field of hydroxyanisole synthesis, and provides a preparation method of p-hydroxyanisole and o-hydroxyanisole. According to the preparation method, anisole and hydrogen peroxide are subjected to a hydroxylation reaction in an organic solvent containing carboxylic acid in the presence of a catalyst, and the catalyst is a metal phthalocyanine complex / titanium silicalite molecular sieve composite catalyst. According to the invention, p-hydroxyanisole and o-hydroxyanisole are prepared through hydroxylation reaction of anisole, and low-carbon-chain carboxylic acid is added, so that the conversion rate of anisole is increased; in the metal phthalocyanine complex / titanium silicalite molecular sieve composite catalyst, metal phthalocyanine is uniformly distributed in a pore channel of a titanium silicalite molecular sieve in a complex form, the metal phthalocyanine modified titanium silicalite molecular sieve is loaded with active components containing alkaline earth metal oxide and alkali metal chloride through an equivalent-volume impregnation method, and the metal phthalocyanine modified titanium silicalite molecular sieve and the active components have a synergistic effect; the catalytic activity of the composite catalyst and the selectivity of hydroxylation reaction of a target product can be improved at the same time.

The invention belongs to the field of organic synthetic chemistry, and discloses a high-efficiency preparation method of 1, 3-propane sultone, which comprises the following steps: 1, chlorination: in the presence of a catalyst, stirring 1, 3-propane sultone and a chlorinating agent in a first organic solvent for reaction, with the catalyst being azodiisobutyronitrile or dibenzoyl peroxide; the chlorinating agent is selected from N-chlorosuccinimide or trichloroisocyanuric acid; 2, elimination reaction: dissolving the 2-chloro-1, 3-propane sultone prepared in the step 1 in a second organic solvent, adding a dehalogenating agent and a polymerization inhibitor, and stirring for reaction; the dehalogenating agent is triethylamine; the polymerization inhibitor is selected from one or two of p-hydroxyanisole, p-tert-butylcatechol, hydroquinone and N, N-diethyl hydroxylamine; and 3, concentrating, crystallizing and drying to obtain a pure product of 1, 3-allylsultone. The method has the advantages of mild and controllable reaction conditions, high product yield, good purity, remarkable reduction of the production cost, simple process steps and suitability for industrial large-scale production.