190results about How to "Strong antioxidant" patented technology

The invention relates to a surface treatment process of a copper foil for a high-Tg halogen-free plate, belonging to the technical field of a production process of a high-precision electrolytic copper foil. In the surface treatment process provided by the invention, a structure shape of a coarsening layer is changed by using a special mixed additive in a coarsening step so as to improve anti-stripping strength; an ultra-fine nanoscale electroplated nickel-zinc alloy is used as a barrier layer to assure the corrosion resistance of the copper foil. Internal properties and pressure plate back color of the copper foil which is treated by the process provided by the invention are similar with those of the copper foil which is imported abroad; the anti-stripping strength on the high-Tg (Tg170) and the halogen-free plate is more than 1.5 N / mm; and the copper foil has characteristic of environmental friendliness and does not contain harmful matters, such as arsenic, antimony, mercury, cadmium, hexavalent chromium and the like.

The present invention relates to a hydraulic-transmission- braking three-use lubricating oil composition, which is prepared by mixing the following raw materials, by weight, 85-98% of high viscosity index base oil, 0.1-5% of an extreme pressure wear resistance agent, 0.1-4% of an antioxidant, 0.1-3% of a metal deactivator / antirust agent, 0.1-5% of a friction modifier, and 0.1-2% of a dispersing agent. The hydraulic-transmission- braking three-use lubricating oil composition has beneficial effects of good low temperature fluidity, friction reduction, wear resistance, corrosion resistance, rust resistance, emulsification resistance and foaming resistance, and can meet requirements of universal hydraulic transmission oil used by large-medium-sized tractors and construction machinery so as to achieve complete lubricating protection on hydraulic parts, transmission parts, gear parts, power output parts and braking parts, such that a long service life is provided, equipment operation stability is easily improved, and energy saving and consumption reduction are provided.

The invention provides composite lithium grease and a preparation method thereof. The composite lithium grease comprises the following components by weight percent: 4-10 percent of hydroxyl fatty acid of C12-C14, 1-4 percent of dibasic acid of C4-C18, 1-4 percent of lithium hydroxide, 0.1-1 percent of organic amine antioxidant, 0.3-1 percent of anti-corrosion rust inhibitor, 1-5 percent of antiwear extreme pressure additive and the balance of base oil. The preparation method comprises the following steps of mixing the base oil with the hydroxyl fatty acid of C12-C14and the dibasic acid of C40C18, heating the mixture to 80-115 DEG C, and adding lithium hydroxide monohydrate aqueous solution to perform saponification reaction, then carrying out dehydration, raising the temperature to 130-180 DEG C to carry out constant-temperature refining, raising the temperature to 200-220 DEG C to carry out highest temperature refining, adding the residual base oil and the additives, cooling and grinding to obtain the composite lithium grease. The composite lithium grease has the advantages of high dropping point, favorable high temperature performance, mechanical stability, antiwear and extreme pressure property, corrosion and rust resistance, and the like.

The invention provides a preparation method of camellia extraction liquid. The method comprises the following steps of 1) removing impurities of fresh camellia and / or fresh camellia buds; cutting up the fresh camellia and / or fresh camellia buds into small sections for use as raw materials; 2) taking a certain number of raw materials; putting the raw materials into an ultrasonic kettle; adding a solvent with the mass ratio being 1:(3-30); uniformly stirring the mixture; adding a certain amount of inorganic acid and / or organic acid; regulating the pH value to 1.3 to 3.0; soaking the materials for 10 to 30 min; 3) then performing ultrasonic treatment for 30 to 60min; controlling the ultrasonic frequency to be 20 to 25KHz, the ultrasonic power to be 1.0 to 2.0KW and the ultrasonic temperature to be 15 to 50 DEG C; then performing filtration, sterilization and detection to obtain camellia extraction liquid. The camellia extraction liquid maintains the color, luster, flavor and effective active ingredients of the camellia to the maximum degree; the anti-oxidation functional ingredients are overall; the contents are high; the safety and the stability are high; cosmetics prepared by using camellia extraction liquid as active ingredients have the excellent whitening, spot-reducing and anti-aging efficacies.

The invention provides skin-care cleansing oil. The skin-care cleansing oil is prepared from components of raw materials in percentage by weight as follows: 20%-70% of grease, 5%-35% of lecithin, 5%-15% of alpha hydroxy acid, 3%-6% of geranium essential oil, 0.2%-0.4% of phytosterol, 0.05%-0.2% of bisabolol, 1%-5% of a moisturizing agent and 0.1%-0.6% of rosemary leaf extracts, and the sum of the components is 100%. On the premise of excellent cleansing capability, the skin-care cleansing oil as a whole has very excellent and powerful skin care efficacy of exfoliating, allergy resistance, oxidation resistance, moisture keeping, skin brightening, skin moistening, little irritation and the like through synergetic matching of the components and addition of a natural lecithin surfactant, alpha hydroxy acid, the geranium essential oil, bisabolol, phytosterol and other functional ingredients.

The invention discloses a high-temperature-resistant radar and infrared compatible stealth material based on a frequency selective surface. The high-temperature-resistant radar and infrared compatible stealth material comprises a dielectric layer I, a resistance layer, a dielectric layer II and the frequency selective surface from inside to outside sequentially, wherein the dielectric layer I and the dielectric layer II are made of oxide fiber reinforced oxide based composite materials; the resistance layer mainly comprises a high-temperature-resistant resistance coating; the frequency selective surface mainly comprises an anti-oxidative metal coating with periodical patterns, high temperature resistance and low infrared emittance. The preparation method comprises steps as follows: the dielectric layer I is prepared firstly, and the resistance layer is prepared on the dielectric layer I with a silk-screen printing technology; then the dielectric layer II is prepared on the resistance layer; finally, the frequency selective surface is prepared on the dielectric layer II with a physical deposition technology and a laser etching technology, and the stealth material is prepared. The radar and infrared compatible stealth material can be resistant to high temperature of 1,000 DEG C or higher, and has better high temperature resistance and excellent oxidation resistance.

The invention discloses a selenoglucomannan preparing method, combining the selenium with glucomannan on a certain condition to achieve the purpose of producing selenium-containing selenoglucomannan. It oxidizes the selenium into Se6+ ion water solution by oxidant; takes the Se6+ ion water solution and adds in alcohol and hydrochloric acid, to make the alcohol content in the solution at 5%-10% and hydrochloric acid content at 1% about; adds glucomannan in a seleno-reaction liquor to make seleno reaction; adds in alcohol to deposit selenoglucomannan; separates and dehydrates selenoglucomannan deposit, and then dries to make it at once.

The invention discloses a selenium, zinc and calcium rich Chinese yam cultivation method including the steps of (1), soaking seedlings or roots of Chinese yam by selenium fertilizer diluent for two to four hours, planting or culturing seedlings after taking the seedlings or roots out of the selenium fertilizer diluent to dry the same, and applying 25-150kg of quick lime per mu according to the state of pH value of soil; (2), mixing selenium fertilizer and zinc fertilizer into base fertilizer during fertilizer applying; (3), mixing 10-50 g of selenium fertilizer per mu with water to water the roots and then applying topdressing; (4), spraying selenium fertilizer diluent, zinc fertilizer diluent and calcium fertilizer diluent to leaf surfaces of Chinese yam during the growth period by two to six times. By the selenium, zinc and calcium rich Chinese yam cultivation method, selenium, zinc and calcium contents of Chinese yam are increased further, nutritive value and health value of Chinese yam are enriched, and physical health of people eating the Chinese yam can be improved.

The invention discloses a gasoline engine lubricating coil composition and a preparation method thereof. The gasoline engine lubricating coil composition comprises the following components in percentby weight: (A) 0.1 to 6.0 percent of an ashless dispersing agent, (B) 0.1 to 8.0 percent of a clearing agent, (C) 0.01 to 1.5 percent of oil-soluble or dispersible oil stability boron-containing compound, (D) 0.003 to 0.5 percent of oil-soluble or dispersible oil stability molybdenum-containing compound, (E) 0.02 to 3.2 percent of zinc dialkyl dithiophosphate, (F) 0.01 to 3.0 percent of an antioxidant and (G) lubricating oil base oil with a main amount, wherein the boron molybdenum mass ratio of the component (C) to the component (D) ranges from 1:5 to 10:1. The blended gasoline engine oil composition contains all of the boron-containing compound, the molybdenum-containing compound and the zinc dialkyl dithiophosphate, completely exerts the synergistic effect between the additives, improves the anti-oxidation property, the anti-wear and friction-reducing properties and the extreme pressure property of the lubricating oil composition and reduces the ash content and the thionazin contentof the lubricating oil composition.

The present invention discloses a processing method of a thermoplastic elastic insole. A TPR thermoplastic elastomer (thermoplastic rubber) as the main raw material, and the following processing steps are adopted, firstly, compounding is that the TPR thermoplastic elastomer and toner are compounded according to the weight ratio of 10000 to 8 till 10000 to 16 and are sent into a kneading machine to be kneaded for 20 to 40 minutes; secondly punching a cloth is that a base material of the cloth is punched and sheared as the shape of a mould of the insole which is needed to for a laying cloth; thirdly injection mold and molding are that at first placing the laying cloth is that the laying cloth is put inside an injection mold and is placed above a lower mold; then feeding is that the well kneaded raw material is put into an injection mold and molding machine, than molding is that the injection mold is sent into the injection mold and molding machine, and the injection mold and molding machine starts to inject towards the injection mold, and the injection temperature is 150 DEG C to 250 DEG C, and injection pressure is 30 bar to 90 bar, and a rotating speed of a screw is 25 to 75 turns per minute, and a backpressure is 3 bar to 4 bar; fourthly punching a margin is that the insole is taken out from the mold, and the redundant marginal material joints are punched down by a punch; fifthly punching is that exhausting pylomes are punched at the insole. The insole produced by the present invention has good breathability, pliability and rebound resilience.

The invention discloses a whitening freckle-removing cosmetic containing a cordyceps sinensis extract. The whitening freckle-removing cosmetic is prepared from cordyceps sinensis, dasiphora davurica leaf, root of gardenia jasminoides ellis., ilex rotunda thunb. bark, Chinese rose leaf, Chinese elm bark, thorny elaeagnus leaf, hovenia dulcis thumb, perilla stem, uncinata spikemoss herb, semen cassiae, white chrysanthemum flower, coltsfoot flower, honeysuckle flower, fructus forsythiae, common fennel, long pepper, chinaberry fruit, herba elsholtziae, ash bark, fruit of beautiful sweetgum, rush, buffalo horn and concha arcae. The whitening freckle-removing cosmetic is capable of boosting skin metabolism, promoting circulation of skin blood, increasing skin nutritions, effectively removing free radicals, eliminating pigmentation, relieving skin wrinkles and freckles, and making the skin finer, smoother, whiter and more elastic.

The invention discloses biaxially oriented polypropylene high-modulus film master batch and a production process thereof. The biaxially oriented polypropylene high-modulus film master batch comprises the following components in percentage by mass: 50-60% of homo-polypropylene, 0-50% of an erectness enhancer, 0.2-1.0 of an antioxidant, 0.5-5% of cage-shaped polyhedral oligomeric silsesquioxane with a grain size of 0.5-10nm. According to the biaxially oriented polypropylene high-modulus film master batch disclosed by the invention, hydrogenated petroleum resin and the cage-shaped polyhedral oligomeric silsesquioxane cooperatively enhance the erectness, so that the erectness of the BOPP film is effectively improved; meanwhile, the BOPP film has the characteristics of low haze and high glossiness, can meet the using requirements of high-speed automatic packaging equipment, and is positive in practical significance.

The invention provides a method for denitration by catalytic direct decomposition of NO with a perovskite type catalyst. The method is performed in a microwave field and the catalyst is a manganese-based perovskite catalyst. Preferably, the catalyst is BaMn1-xMgxO3, wherein x is 0-0.4. When the specific perovskite catalyst provided by the invention is matched with microwaves, direct catalytic decomposition of NO can be performed under the conditions of low temperature and high oxygen content. The microwave catalytic direct decomposition reaction of NO has no secondary pollution; and furthermore, the process is simple, the operation is convenient and easy to control, the removal efficiency of NO is high (the conversion rate of NO can achieve 99.8%), and the method further has the advantages of strong oxidation resistance, low operation temperature, energy conservation, environmental friendliness and low operation cost. Smoke gas or waste gas after treatment by using the method provided by the invention can directly achieve a national emission standard.

The invention provides a method for denitrifying NO by directly decomposing NO catalytically by using a supported metal oxide catalyst. The method is carried out in a microwave field. The catalyst is a supported mixed metal oxide catalyst which is characterized in that a mixed metal oxide MOx is supported on an Al2O3 carrier, wherein M is selected from two or three of cerium, copper, manganese and nickel; preferably, the catalyst is selected from CeCuOx / Al2O3, CeMnOx / Al2O3, CeNiOx / Al2O3 and CeCuMnOx / Al2O3. The method has the advantages that secondary pollution is avoided through microwave catalytic direct NO decomposition reaction; the process is simple, is convenient to operate and easy to control, is high in NO removal efficiency (the NO conversion rate can be 95.1%), strong in oxidation resistance and low in operating temperatures, is energy-saving and environment-friendly and is low in operating cost; the flue gases or waste gases treated by using the method can be directly up to the national emission standard.

A carbon / carbon composite material oxidation-resistant coating comprises the components (by weight portion) of silicon 10%-15%, boron 10%-15%, microcosmic salt 60%-70%, aluminum oxide 5%-10%, the preparation process comprises mixing the four substances, stirring evenly , coating the surface of carbon / carbon composite material, heat treating 2-3 hours (nitrogen atmosphere) at 800 deg. C to 900 deg. C, wherein the coating and high temperature heat treatment processes are carried out under atmospheric pressure.

The invention relates to a preparation method of a composite alloy coating on a tantalum-tungsten alloy. The preparation method comprises the following steps of 1, MoSi2 coating slurry preparation, 2, MoSi2 coating high-temperature sintering, 3, Hf-Ta alloy coating slurry preparation, and 4, Hf-Ta alloy composite coating sintering. According to the preparation method, the product surface is spray-coated with the prepared MoSi2 coating as a transition layer, and the surface of the transition layer is spray-coated with an Hf-Ta alloy coating. The preparation method solves the problem of Hf-Ta alloy coating and base material bonding and tantalum-tungsten alloy high-temperature oxidation. The prepared composite alloy coating is uniform and compact, has no defects such as holes and cracks and has good oxidation resistance.

The invention relates to a preparation method for a formed catalyst for directly catalyzing N2O to decompose, and belongs to the technical field of environment protection catalytic materials and air pollution control. According to the catalyst, a compound material is used as a carrier to load metal oxide. The main active components are oxides of Zn and Ni, and one or two types from the oxides of Cu, Fe, Sr, La, Co, K, Na, Zr, Y or Ba are simultaneously loaded. The catalyst is characterized in that the compound material comprises two or more substances including clay, active carbon, bakelite powder, sesbania powder, special pseudo-boehmite powder, SiO2, TiO2, ZrO2, sandy soil and zinc oxide; the catalyst is columnar, clover-shaped or takes the shape of geranium nepalense sweet; the external diameter is 1-20 mm. The metal oxides accounts for 30-55% of the total weight of the catalyst, wherein the nickel oxide accounts for 1-5%, and the zinc oxide accounts for 30-45%. The catalyst can be widely used for removal and decomposing of N2O in a nitric plant, an adipic acid plant and other industrial process generating N2O.

The invention belongs to an extraction method of natural pigment anthocyanin and particularly relates to a method of separating anthocyanin from purple highland barley. The method comprises the following steps of: crushing purple highland barley skins and performing micro-crushing treatment on the purple highland barley skins; adjusting the pH to 3-3.5 and soaking; ethanol leaching; ultrasonic extracting; concentrating; resin adsorbing; and refining the anthocyanin pigment. The method disclosed by the invention has the beneficial effects of adding additive glucose in the leach liquor before the concentration step to glycosylate the leach liquor, adding acetic acid to acylate the leach liquor so as to stabilize the anthocyanin structure, and adding natural flavone substance to perform a co-pigment function to protect the anthocyanin structure so as to reduce the damage of the anthocyanin and improve the extraction yield of the anthocyanin.

A lithium ion battery electrolyte comprise a non-aqueous organic solvent, a lithium salt and an additive, wherein that additive comprises dicyclohexylcarbodiimide, amino compound and isocyanate compounds. In the technical scheme provided by the invention, the additive of the electrolyte of the lithium ion battery comprises dicyclohexyl carbodiimide, amino compounds and isocyanates, wherein dicyclohexyl carbodiimide assists amino compounds and isocyanate compounds to participate in film formation, By forming a chain or network polymer film on the surface of the positive and negative electrodesof the lithium ion battery which is insoluble in the electrolyte and has strong oxidation resistance and good toughness, the impedance of the battery is reduced, and the high-temperature cycling performance and the rate performance of the lithium ion battery are improved.

The invention provides a method for inhibiting the corrosion of an oil producing well tube inner wall. The method comprises the following steps of: injecting silicon zirconium compound liquid with the solid content being 10 to 50 percent and the temperature being 30 to 90 DEG C into the well tube inner wall to from a precipitation membrane on the well tube inner wall; injecting a composite corrosion inhibitor with the concentration being 500 to 5000 mg / L into the precipitation membrane; and forming a dynamic adsorption membrane on the basis of the precipitation membrane. When the method for inhibiting the corrosion of the oil producing well tube inner wall provided by the invention is used, the corrosion of the oil producing well tube inner wall can be effectively inhabited, and the duration time is long.

The invention relates to a migratory phase separation method for preparing core-shell structure nanofibers. The method includes dissolving fluoropolymer and associative polymer in an organic solution, heating and stirring till being dissolved completely, and mixing the two solutions by a certain mass proportion to obtain an electrostatic spinning solution; utilizing the electrostatic spinning solution to spin electrostatically, collecting fibers on a receiver, processing the obtained fibers in a vacuum oven with the constant temperature of 30 DEG C for 24 hours, and obtained the core-shell structure nanofibers. The invention aims to provide a preparing method of the core-shell structure nanofibers, the low surface of fluorine can allow the fluoropolymer to migrate to the surface rapidly during electric spinning, the core-shell structure nanofibers with clear phases are prone to forming, the preparing process is simple and easy to operate, the requirements on equipment is low, energy consumption is low, and preparing cost is also low.

The invention discloses a preparation method of a high-temperature anti-oxidant for lubricating oil. 2,6-di-tert-butyl phenol and substituted diphenylamine are taken as raw materials, and n-decane is taken as a high-boiling-point solvent. The materials above are reacted at 120-170 DEG C for 2-4 h under the action of a catalyst and in the presence of a noble gas to obtain a product, and the product is treated to obtain the target product. Anti-oxidants, of 2,6-di-tert-butyl phenol and substituted diphenylamine, with excellent antioxidant performance are used in the invention. The use temperature of the anti-oxidant is increased, and the working time of lubricating oil is greatly prolonged. The high-temperature anti-oxidant for lubricating oil has advantages of high temperature resistance, good anti-oxidant performance, and good solubility in lubricating oil. It is proved through a high-temperature antioxidant experiment that the high-temperature anti-oxidant has excellent properties and a bright application prospect.

The invention discloses a lubricating grease composition and a preparation method of the lubricating grease composition. The lubricating grease composition consists of the following materials by weight: 70-85% of lubricating grease base oil, 12-27% of a double thickening agent and 0.1-3% of an additive, wherein the lubricating grease base oil is silicone oil. The preparation method adopts silicone oil with good high-temperature and low-temperature performance as the lubricating grease base oil, is simple in process, and effectively reduces the energy consumption relative to a two-step method.In the lubricating grease composition of the invention, nano-SiO4 is used as a thickening agent and the additive simultaneously. The additive also comprises such solid additives as an antioxidant, a rust protection agent and the like. The lubricating grease composition of the invention has good colloid stability, mechanical stability and high and low temperature performance, and can be suitable for an extreme operating condition.

The invention discloses low-temperature brazing solder for aluminum substrate materials. The solder is leadless solder; and not only the solidified structure is improved compared with needle zinc-phase tin-zinc eutectic alloy and the wettability is improved but also the solder can form joints with higher strength with aluminum substrates. The low-temperature brazing solder for the aluminum substrate materials comprises the following chemical compositions in percentage by weight: 9 to 15 percent of zinc, 0.01 to 2 percent of aluminum, 0.01 to 2 percent of silver, 1 to 3 percent of bismuth, and the balance being tin. The leadless solder alloy obtained by the proposal does not use toxic lead, has stronger antioxidation and better wettability compared with the prior Sn-Zn alloy, and is more suitable for aluminum soft soldering compared with the prior Sn-Ag-Cu solder alloy; and the joints have better performance and lower cost.

The invention provides a phosphate ester hydraulic oil composition. The composition provided in the invention comprises phosphate ester base fluid, a viscosity index improver, an antioxidant, a metal corrosion inhibitor, an anti-rust agent, an anti-electroerosion agent, and an acid capturing agent. Specifically, the phosphate ester base fluid is composed of tri-butyl phosphate, triisobutyl phosphate and alkyldiaryl phosphate. The viscosity index improver is prepared by a polymerization reaction of an alkyl alkylacrylate monomer and an isoalkyl alkylacrylate monomer. The phosphate ester hydraulic oil composition provided by the invention has excellent flame resistance, low temperature fluidity, shear stability, oxidation resistance, metal corrosion inhibition performance, anti-electroerosion performance and rust resistance.

The invention discloses a dioxygen activating mask for comprehensively repairing skin and assisting skin to regenerate, activate and become fine and smooth, and bright. The dioxygen activating mask is prepared from the following components in percentage by weight: 0.01%-0.1% of saccharomyces lysate extract, 0.005-0.025% of astaxanthin, 0.1%-0.3% of opuntia extract, 0.01%-0.03% of orange flower extract, 0.01-0.03% of asiatic pennywort herb extract, 0.1%-0.3% of mayweed flower extract, 1%-5% of fibroin, 0.3%-0.6% of green alga extract, 3%-5% of glycerol, 1.0%-3.0% of sodium lactate, 1.0%-3.0% of sodium pyrrolidonecarboxylate (PCA), 0.03%-0.2% of sodium hyaluronate, 80%-90% of water and 0.2%-3% of accessories.

The invention provides a phosphate-hydraulic oil composition. The phosphate-hydraulic oil composition comprises tributyl phosphate, trisisobutyl phosphate and alkyl diaryl phosphate, wherein the tributyl phosphate occupies 60-90% of a total mass of a base solution; the trisisobutyl phosphate occupies 1-35% of the total mass of the base solution and the alkyl diaryl phosphate occupies 1-30% of the total mass of the base solution. A viscosity index improver prepared by polymerization of alkyl (alkyl)acrylate monomers and alkyl (isomeric alkyl)acrylate monomers can also be added in the composition. The phosphate-hydraulic oil composition provided by the invention has excellent flame resistant properties, low-temperature fluidity, shearing stability properties, antioxidant performance, metal corrosion inhibition performance, electrical erosion resistance and anti-corrosion performance.

The invention discloses an insect prevention wood plastic interior door and a preparation method of the insect prevention wood plastic interior door. The interior door is prepared from the following raw materials in percent by weight: 10-15 percent of PVC resins, 0.3-0.7 percent of stearic acid, 0.4-0.6 percent of chlorinated paraffin, 0.3-0.6 percent of ACR processing agent, 0.3-0.5 percent of CPE, 0.3-0.5 percent of Ba / Cd / Zn stabilizing agent, 4-7 percent of light calcium carbonate, 2-4 percent of DIOP plasticizers, 0.2-0.5 percent of BPO cross-linking agents, 0.04-0.06 percent of light stabilizers, 28-35 percent of wood powder, 38-50 percent of PVC waste strips, and 1-3 percent of Chinese medicine residue powder. According to the insect prevention wood plastic interior door, the Chinese medicine residue powder having an effect of desinsectization or insect protection is added into a formula, so that a door plate can keep in a good condition in a moist or bad-illumination room, the breakage and the crevice are avoided, and the service life is prolonged under a moist condition.

The invention belongs to the field of antioxygen, in particular to an emulsion antioxygen and a preparation method thereof. The emulsion antioxygen is emulsified and compounded by the following raw material reagents at the proportion: main antioxygen, auxiliary antioxygen, emulsifying agent, dispersing agent and defoaming agent. The emulsion antioxygen has better oxidation resistance than other similar antioxygens and can achieve the optimal oxidation resistance effect, and the total solid content of the emulsion antioxygen is more than 52%. The emulsion antioxygen has the advantages of good oxidation resistance effect, big activity, low volatility, high durability, no pollution and the like and is especially suitable for protecting tint and pollution-free color polymer thereof. The emulsion antioxygen can be favorably dispersed in ABS (Acrylonitrile Butadiene StyreneAcrylonitrile Butadiene Styre) rubber latex, is ideal antioxygen used preparing ABS by emulsion polymerization and has excellent dispersibility. According to the emulsion antioxygen, the heating oxygen aging time of the ABS resin can be prolonged in the ABS production, the oxidation inducing temperature of the ABS resin is improved, the phenomenon that the ABS resin becomes yellows in the production and processing process thereof can be prevented, the strength of a product can be improved, and the oxidation resistance problem for preparing ABS by emulsion polymerization can be solved.

The invention relates to a two-step preparation method of an acrylamide copolymer. The two-step preparation method is characterized in that by initiation of a novel low-temperature oxidation-reduction composite initiation system, acrylamide (AM), 2-acrylamide-2-methylpro panesulfonic acid (AMPS) and allylthiourea undergo an aqueous solution adiabatic polymerization reaction, rubber bricks are subjected to primary granulation, the rubber granules are subjected to hydrolysis, the hydrolysis product is subjected to secondary granulation, and the granules are dried, crushed and screened so that the acrylamide copolymer is obtained. The acrylamide copolymer has good high-temperature oxidation resistance. The invention discloses the oxidation-resistant polyacrylamide oil-displacement agent and the preparation method thereof.