51results about How to "Inhibition of oxidative degradation" patented technology

The invention discloses an acrylamide modified graft copolymer and a preparation method and usage thereof. The invention is characterized in that 20 parts of acrylamide, 1-20 anionic monomer and/or cationic monomer, 0.1-15 macromonomer, 0.05-10 ionic lyophobic monomer and 50-1000 deionized water are added into a three-necked reaction bottle, the pH value is adjusted to be 3-9, N2 is introduced for 30min, then 0.002-0.5 part of initiator persulfate is added at 30-75 DEG C, the reaction lasts 8-36h, then copolymer PAB is obtained, and finally water is used for dilution to obtain strong PAB solution. During polymerization, no surfactant is used, and the macromonomer with a long chain and the ionic lyophobic monomer with intermolecular association function are introduced into the copolymer PAB, so the capabilities of cooperative tackification and salt-resistance between the rigid conformation of a molecular chain and the intermolecular association can be played optimally, the PAB exhibits unique solution property and has higher colloidal viscosity in high saline solution than in fresh water, and the PAB obtains the capabilities of tackification, salt resistance, low surface tension and strong molecular association and can be used for the oil-displacing acrylamide modified graft copolymer. The copolymer is prepared into water solution with mass concentration of 0.2-3.0g/L and surfactant concentration of 0.01-2 mmol/L, then the water solution is added into a mixing vessel by a stirring device, and then a polymer oil-displacing agent with tackification, salt resistance and cutting resistance is obtained. The PAB has the functions of both a tackifier and a macromolecule surfactant. The copolymer PAB is prepared into water solution which has mass concentration of 0.05-7%, so the macromolecule surfactant with excellent surface activeness can be obtained and then applicable to an emulsifier, an emulsion splitter, a solubilizer and a wetting agent.

The invention discloses a non-linear associated water soluble quadripolymer as well as a preparation method and use thereof, comprising: adding 20 parts of acrylamide, 1-20 parts of nionic monomer or/and cationic monomer, 0.1-15 parts of macromonomer, 0.05-10 parts of hydrophobic monomer, 0.1-50 parts of surfactant and 60-1000 parts of deionized water to a three-necked reaction flask, adjusting the pH to be 3-9, adding 0.002-1 part of initiator (persulphate) at 30-75 DEG C after introducing N2 for 30min, reacting for 8-36h to obtain the quadripolymer PACH, diluting with water, and obtaining concentrated PACH solution. The macromonomer with a long chain and the hydrophobic monomer with a molecular association function are simultaneously introduced in a copolymer PACH, which can obtain the best synergistic viscosifying between rigid conformation of a molecular chain and molecular association and salt resistance. The non-linear associated water soluble quadripolymer is obtained. The copolymer is prepared into aqueous solution with the mass concentration of 0.2-3g/l and the surfactant concentration of 0.01-2mmol/l, added to a mixing vessel with a stirring device and evenly stirred at the room temperature to obtain a viscosified, salt-resistant and shear-resistant polymer oil displacement agent. The PACH has dual functions of a viscosifier and a high molecular surfactant; minute amount of a low molecular surfactant is added to the PACH solution, thus improving the apparent viscosity of the solution, reducing the surface tension of solution and the water-oil interfacial tension, and being beneficial to improving the crude oil recovery ratio. A copolymer PABE is prepared into the aqueous solution with the mass concentration of 0.05-7% to obtain high molecular surfactant with excellent surface activity, and the high molecular surfactant is used as an emulsifier, a demulsifier, a solubilizer and a wetting agent.

The invention adopts polyacrylamide and a nano inorganic phase to prepare a polyacrylamide nano composite material through an in-situ polymerization method and then forms a fracturing fluid thickening agent. The nano inorganic phase is prepared by mixing the products of intercalation reactions between an organic long-chain intercalator and layered silicate with magnesium nitrate and aluminum nitrate. The nano inorganic phase, acrylamide monomer, a coupling agent, a complexing agent, an initiator, an oxidant, a reductant, a cosolvent, an auxiliary agent, and deionized water form a suspension fluid reaction system, and the polyacrylamide nano composite material is formed after the polymerization-intercalation composite reactions. The polyacrylamide nano composite material with a mass percentage of 0.25% is taken as the thickening agent, and then is mixed with a crosslinking agent with a mass percentage of 0.20%, a gel breaker with a mass percentage of 0.20%, and other auxiliary agents to form a fracturing fluid system. The system is sheared for 70 minutes under a shearing speed of 170 s<-1> at a temperature of 150 DEG C so as to form a fracturing fluid with a viscosity larger than 50 mPa.s, and the fracturing fluid has the characteristics of high temperature resistance, shearing resistance, low frictional resistance, complete glue breaking effect, and good compatibility with the formation fluid.

The invention discloses a method for preparing an allyl surface-active macromonomer, which is characterized by comprising the following steps: adding 20 portions of alkylphenol polyoxyethylene ether (CmH2m+1-C6H4-O-(CH2CH2O)nH, n is equal to 1 to 60, and m is equal to 1 to 20), 10 to 900 portions of solvent and 0.1 to 15 portions of catalyst into a three-mouth reaction flask with a reflux condensation device, and reacting the mixture for 1 hour under stirring at the room temperature; increasing temperature to 30 to 95 DEG C, adding 0.5 to 20 portions of allyl chloride into the reaction product, and continuously reacting for 6 to 48 hours; distilling the reaction product under reduced pressure to remove the solvent so as to obtain a crude product; and performing silica gel column chromatographic separation to obtain allyl alkylphenol polyoxyethylene ether with the yield of 70 to 95 percent. The allyl alkylphenol polyoxyethylene ether has excellent surface activity, and can be directly used as a surfactant. A water-soluble copolymer synthesized by taking the allyl alkylphenol polyoxyethylene ether as a surface-active macromonomer has the function of tackifying, or reducing solution surface tension and water-oil interfacial tension, and can be taken as a tackifying copolymer or a macromolecular surfactant for improving the oil recovery ratio.

The invention discloses a novel high-strength HDPE (High-Density Polyethylene) composite tube, which is obtained by composting an HDPE core tube, and a modified PE (Poly Ethylene) layer, wherein the innermost layer is the HDPE core tube which is enwrapped by a PE bonding layer, and the modified PE layer enwraps the PE bonding layer. The composite tube disclosed by the invention has the characteristics of good shock resistance, high compression strength, high wear resistance and the like. The HDPE core tube is corrosion resistant so that the composite tube is long in service life and capable of resisting the invasion by various corrosive media, such as an acid, an alkali and a salt, the modified PE layer is adopted so that plastic oxidative degradation is inhibited, tube ultra-violet resistance performance is improved, and tube service life is prolonged, and the PE bonding layer adopts a thermoplastic elastic body so that material performance is greatly improved, bonding capacity between the core tube and the modified PE layer is improved, and service life can reach 60 years.

The invention discloses water-solubility micro-crosslinking copolymer, a method for making the same and an application of the same. The method is characterized in that: 20 portions of acrylamide, 0.5 to 15 portions of anion monomer, 0.1 to 6 portions of divinyl benzene, 0.5 to 50 portions of sodium laurylsulfate and 50 to 800 portions of deionized water are added in a three-necked reaction bottle, and the pH value of the solution is adjusted to between 4 and 9; after N2 is injected for 30 minutes, 0.001 to 0.2 portions of initiator persulphate is added in at a temperature of between 30 and 70 DEG C so as to carry out reaction for 6 to 36 hours, thereby obtaining PADM; then, the PADM is diluted by water to obtain a PADM solution, thereby obtaining the water-solubility micro-crosslinking copolymer which has ideal water solubility, copolymerization micro-crosslinking structure, difficult intramolecular crimp and molecular association capacity and can be used in oil expulsion. The copolymer is made into an aqueous solution with the mass concentration of between 0.3 and 3 g/L and the surfactant concentration of between 0.01 and 4 mmol/L, and then is added in a mixing vessel provided with a stirring device so as to be stirred evenly at room temperature, thereby obtaining a polymer oil displacement agent which is tackifying, salt resistant, thermotolerant and shear resistant and has excellent age resistance under the conditions of high salt and 110 DEG C. Moreover, the raw materials of PADM are easy to obtain; therefore, the water-solubility micro-crosslinking copolymer and the method have enormous application prospect in increasing crude oil recovery ratio.

The invention discloses a method for preparing a 4-vinyl benzyl surface-active macromonomer, which is characterized by comprising the following steps: adding 20 portions of alkylphenol polyoxyethylene ether (CmH2m+1-C6H4-O-(CH2CH2O)nH, n is equal to 1 to 60, and m is equal to 1 to 20), 10 to 900 portions of solvent and 0.1 to 15 portions of catalyst into a three-mouth reaction flask with a reflux condensation device, and reacting for 1 hour under stirring at the room temperature; increasing temperature to 30 to 90 DEG C, adding 0.5 to 25 portions of 4-vinyl benzyl chloride into the reaction product, and continuously reacting for 6 to 48 hours; distilling the reaction product under reduced pressure to remove the solvent so as to obtain a crude product; and performing silica gel column chromatographic separation to obtain 4-vinyl benzyl alkylphenol polyoxyethylene ether with the yield of 62 to 94 percent. The 4-vinyl benzyl alkylphenol polyoxyethylene ether has excellent surface activity, and can be directly used as a surfactant. A water-soluble copolymer synthesized by taking the 4-vinyl benzyl alkylphenol polyoxyethylene ether as a surface-active macromonomer has the function of tackifying, or reducing solution surface tension and water-oil interfacial tension, and can be taken as a tackifying copolymer or a macromolecular surfactant for improving the oil recovery ratio.

It is an object of the present invention to provide a drug solution which has a reduced dissolved oxygen content and is less susceptible to oxidative degradation and highly stable over time, a production method therefor, and a drug solution containing pack which is capable of maintaining the dissolved oxygen content of a drug solution at a reduced level, less susceptible to oxidative degradation of the drug solution and highly stable over time. To achieve the aforementioned object, the reduced-dissolved-oxygen-content drug solution is produced by filling and sealing the drug solution in a drug solution container (15) formed of a plastic material having an oxygen permeability of not lower than 200 cm³/m²·24 h·atm at 25° C. at 60% RH within 12 hours after a steam sterilization process or a hot water sterilization process and having a steady-state oxygen permeability of not higher than 100 cm³/m²·24 h·atm at 25° C. at 60% RH, subjecting the drug solution container to the steam sterilization process or the hot water sterilization process, and storing the drug solution container in an environment having deoxidization means for reducing the dissolved oxygen concentration of the drug solution to not higher than 2 ppm when the oxygen permeability of the plastic material reaches the steady-state level.

The invention discloses a benzotriazole-hindered amine composite photostabilizer of which the structural formula is disclosed in the specification, wherein R1 is H, CH3, C2H5, OCH3, OC2H5, Cl or Br, R2 is disclosed in the specification, R3 is alkyl group, alkoxy group or alkanoyl group, and R4 is H, alkyl group, alkoxy group or alkanoyl group. The invention also discloses a preparation method of the benzotriazole-hindered amine composite photostabilizer, which comprises diazo-coupling reaction, reduction ring-closing reaction, acyl-chlorination reaction, and alcoholization or ammonification reaction, thereby obtaining the benzotriazole-hindered amine composite photostabilizer.

The invention relates to the field of preparation of antioxidants, in particular to a preparation method of a novel polyphenols antioxidant. The preparation method comprises the following steps: preparing an intermediate which adopts 3,5-di-tert-butyl-4-hydroxy-benzyl alcohol: adding 7.27 g of paraformaldehyde, 1.08 g of potassium tert-butoxide and 100 mL of tertiary butanol into a round-bottom flask with the volume of 500 mL, heating the flask under a condition of 70 DEG C till the paraformaldehyde is depolymerized; adding 20 g of 2,6-di-tert-butylphenol into the reaction liquid for reactionunder a normal temperature condition for 3 h, then adding 200 mL of deionized water into the reaction liquid, adding 100 mL of an ethyl acetate extraction organic phase, drying the mixture with a drying agent for 2 h, and carrying out suction filtering to remove the drying agent. The preparation method is simple in process and convenient to operate; a product is relatively high in heat stability and oxidization resistance, is high in compatibility with a polymer, can inhibit oxidative degradation of polypropylene, polyethylene, acrylonitrile-butadiene-styrene resin and polystyrene, and also can be used for synthesizing natural rubber, plastic and lubricating oil.

The invention provides flame-retardant high-temperature-resistant irradiation-resistant silicone rubber. The silicone rubber comprises the following components, by mass, 100 parts of raw methyl phenylvinyl silicone rubber, 10-60 parts of raw methyl vinyl silicone rubber, 1-10 parts of polyorganometallosiloxane, 2-10 parts of a structured control agent, 20-70 parts of fumed silica, 0.5-5 parts ofhigh vinyl phenyl silicone oil, 0.1-5 parts of a nanometer heat-resistant agent, 1-5 parts of nanometer radiation-resistant particles, 5-60 parts of a heat-resistant modified additive, 1-5 parts of aheat-resistant modified nitrogen flame retardant, 0.005-1 part of a platinum complex and 0.5-3.0 parts of a vulcanizing agent. The invention further provides a preparation method of the flame-retardant high-temperature-resistant irradiation-resistant silicone rubber. According to the flame-retardant high-temperature-resistant irradiation-resistant silicone rubber and the preparation method thereof, the prepared silicone rubber has very good high temperature resistance and irradiation resistance, is low-smoke, halogen-free, flame-retardant and water-resistant, and can be used as a nuclear powercable insulating material.

The invention discloses a modified glass microsphere and a preparation method thereof and a method for preparing a composite resin product by using the modified glass microsphere. The modified glass microsphere includes a first class glass microsphere and a second class glass microsphere, a discontinuous metal layer and an ultraviolet absorbent wrap the surface of the first class glass microsphere, a hydrophobic material wraps the surface of the second class glass microphere, the coverage rate of the metal layer on the surface of the first glass microsphere is 45.0%-85.0%, and the modified glass microbead is added into the component of a common anti-yellowing product to improve the anti-yellowing property and the mechanical property of the product.

The invention discloses an oxidation inhibitor, a carbon dioxide absorbent and a carbon dioxide absorption method thereof. The carbon dioxide absorbent comprises a mixed aqueous solution of ethanolamine (MEA) and sulfolane (TMS) and an oxidation inhibitor, wherein the oxidation inhibitor is selected from glycerol, D-sorbitol, xylitol and erythritol; and MEA and TMS account for 25%-50% and 20%-50%respectively, and the content of the oxidation inhibitor is greater than 0 and less than or equal to 10%. The method comprises the following steps: adding the carbon dioxide absorbent into an absorption tower for an absorption reaction with carbon dioxide gas to form a carbon dioxide absorption liquid; enabling the carbon dioxide absorption liquid to enter a phase splitter for standing and layering to form an enriched phase enriched with carbon dioxide and a lean carbon dioxide absorption phase; and enabling the enriched phase to enter a desorption tower to desorb high-purity carbon dioxide, and returning the absorption phase to the absorption tower as the carbon dioxide absorbent to continuously participate in the absorption reaction. The method has the advantages of good absorbent oxidation inhibition, high carbon dioxide absorption efficiency and the like.

The invention belongs to the technical field of ticagrelor and in particular relates to a ticagrelor slow-release preparation as well as preparation and application thereof. The ticagrelor slow-release preparation provided by the invention comprises at least one rapid release layer and at least one slow release layer, wherein each of the rapid release layer and the slow release layer contains theticagrelor; the mass ratio of the content of the ticagrelor in the rapid release layer to the content of the ticagrelor in the slow release layer is 1 to (3 to 7); the ticagrelor slow-release preparation is used as a medicine for anti-platelet treatment; on one hand, the preparation has reasonable plasma drug peak concentration; on the other hand, the residual ticagrelor is slowly released and stable plasma drug concentration is maintained; the anti-platelet treatment effect is good and the bleeding tendency is reduced; the preparation is orally taken once each day and has good patient compliance and high utilization safety; the preparation method of the ticagrelor slow-release preparation has the advantages of simple technology, relatively low cost and good practicability.

The invention relates to a gadenia yellow pigment extraction device and a high-color-value gadenia yellow pigment extraction method. The device comprises a vacuum drying tank, an extraction opening, a feeding device and a negative ion generation device, wherein the extraction opening is formed in the top of the vacuum drying tank, and the feeding device and the negative ion generation device are respectively arranged on the side wall; the feeding device comprises a feed inlet and a high-strong magnetic pipeline; the feed inlet is communicated with the interior of the vacuum drying tank through the high-strong magnetic pipeline; the negative ion generation device consists of a gas circulating pump, a gas heating column, a negative ion generation device and a gas guide pipe; the gas circulation pump comprises a gas inlet formed in the side wall of the vacuum drying tank; the height of the gas inlet is greater than that of the liquid inside the vacuum drying tank; the gas guide pipe extends into the vacuum drying tank from the bottom of the vacuum drying tank and is arranged below the liquid level; and the gas inlet is communicated with the gas guide pipe sequentially through the gas circulating pump, a gas heating column and the negative ion generation device. The gadenia yellow pigment extraction device has the advantages that a target product is effectively ensured not to be oxidized, no chemical reducing agents are required and the like.

The invention discloses an engine performance recovery protective agent and a processing technology. The engine performance recovery protective agent comprises the following components in parts by mass: 20-40 parts of base oil, 5-10 parts of purified MoDTCs, 5-10 parts of tricresyl phosphate, 10-30 parts of ZDDP, 10-20 parts of sodium chloride, 5-15 parts of a succinimide ashless dispersant and 5-10 parts of a clearing agent. In the high-temperature and high-pressure environment of an engine, when the protective agent is rubbed, the temperature rises rapidly, carbon disulfide and molybdenum disulfide are decomposed, convex-concave parts on the metal surface are filled and leveled up, and the smooth and anti-friction effects are achieved; the protective agent can repair metal abrasion and activate an oil seal under the condition that an engine is not disassembled, a molybdenum alloy protective layer which is extremely thin but has extremely high compressive strength and good abrasion resistance is formed on the metal surface, the lubricating performance is excellent, friction in the engine is greatly reduced, the oxidation resistance of lubricating oil is remarkably improved, oxidative degradation of the lubricating oil is effectively inhibited, formation of high-temperature sediments and low-temperature oil sludge is reduced, and super-strong protection is formed for the engine.

The invention discloses a special anti-ageing and low-temperature-resistant modified fluoride rubber sheath material for a ship cable. The material is prepared from fluoride rubber, fluorine-containing acrylate rubber, epoxy acrylate rubber, HNBR, maleic anhydride grafted polyethylene, stearic acid, active magnesium oxide, bisphenol AF, benzyl triphenyl phosphorus chloride, trimethylolpropane trimethacrylate, phenolic resin, carbon nanotubes, stearic acid modified diatomite, calcium silicate, polyaniline nanofiber, magnesium hydroxide, calcium hydroxide, inositol hexaphosphate, epoxidation triglyceride fatty acid, epoxy linseed oil, 2,6-ditert-butyl-p-aminophenol, 2,5-di-tert-butylhydroquinone, nitrosodiphenylamine, butylmercaptooxo stannane and accelerant. The special anti-ageing and low-temperature-resistant modified fluoride rubber sheath material for the ship cable is high in strength, good in anti-ageing performance, excellent in oil resistance and low temperature resistance and capable of meeting use requirements of ship cable sheaths.

The invention provides a preparation method of acidification-resistant Xuan paper. The method includes firstly, preparing a gelatin-alum matrix liquid from deionized water, gelatin and alum; preparinga cross-linking mixed solution by taking hydrolyzed protein, ethylene glycol diglycidyl ether and water as raw materials; adding a monomer into the cross-linked mixed solution serving as a matrix toprepare a cross-linked matrix emulsion; mixing magnesium oxide, water and sodium hydroxide as raw materials to prepare acidification-resistant modifying particles; mixing the gelatin-alum matrix liquid, the cross-linked matrix emulsion and the acidification-resistant modifying particles, and homogenizing to prepare a sizing agent; performing sizing treatment on a Xuan paper matrix, airing and drying to obtain the acidification-resistant Xuan paper. The preparation method not only can effectively improve the color fastness of the Xuan paper in use, but also can reinforce cellulose in the Xuan paper material, so that the mechanical strength of the Xuan paper material is improved, and the storage period of the Xuan paper is prolonged.

The invention discloses an aramid fiber composite core with environmental resistance and a preparation method thereof, and belongs to the technical field of aramid composite core preparation. The aramid composite core comprises aramid fibers, a sizing agent anti-photoaging layer, a resin anti-photoaging layer and a hydrolysis-resistant layer. The preparation method comprises the following steps that anti-photoaging ZnO and TiO2 light shielding agents are correspondingly added into the sizing agent and resin, fibers passing through the sizing agent are dried, the fibers enter a gum dipping tankfor gum dipping, the fibers enter a curing mold after gum dipping, the fibers are pulled out and molded by a dragger, the prepared composite core is subjected to post-curing treatment and passes through deposition equipment after complete curing, the composite core surface is coated with a layer of compact hydrolysis-resistant coating layer such as PEEK or PA, and the treated aramid fiber composite core has anti-photoaging and damp-heat aging resistance.