244 results about "Polyoxydony" patented technology

The invention relates to the field of water treatment, and discloses a scale and corrosion inhibitor for seawater circulating cooling water, which is prepared from phosphonic acid grafted maleic anhydride-acrylic acid copolymer, hydroxyethylidene diphosphonic acid, amino trimethylene phosphonic acid, N, N-dimethylformamide, N, N-dimethylformamide, N, N-dimethylformamide, N, N-dimethylformamide, N, N- The anti-corrosion coating is prepared from the following raw materials: N, N-diethylaminomethyl-benzotriazole, gamma-aminopropyltriethoxysilane, zinc salt and a polyoxyethylene-polyoxypropylene block copolymer. The core of the invention is that all the raw material components form the thermo-sensitive polyelectrolyte compound through a self-assembly process. The compound is stably dispersed at low temperature by utilizing the cloud point effect of the block copolymer, and is subjected to phase change and preferential deposition on a high-temperature heat exchange surface, so that targeted and efficient delivery of various active components is realized. According to the invention, the problems of incompatibility of components and poor stability of a traditional compound agent are solved, the product has excellent storage stability, and efficient and synergistic corrosion and scaling control can be realized under high-temperature and high-salinity working conditions.

The application belongs to the technical field of dechlorination carrier and specifically provides a preparation method of a dechlorination active carrier, which comprises the following steps: 1) polyoxyethylene-polyoxypropylene block copolymer and modified protein solution are dissolved in deionized water, then cobalt nitrate, aluminum lactate and 2-aldehyde benzene boronic acid are added and stirred uniformly, reaction is carried out at 110-130 DEG C, centrifugation and drying are carried out to obtain a precursor; 2) tetrabutylphosphonium hydroxide and sodium aluminate are added into deionized water, TEOS and the precursor are added after mixing, stirring is carried out, crystallization is carried out at 165-175 DEG C, centrifugation and washing are carried out, and the obtained solid is dried and calcined to obtain the dechlorination active carrier. The carrier prepared by the application has the advantage of good dechlorination effect.

The invention relates to the technical field of waste gas treatment, and particularly discloses waste gas treatment liquid for treating large-air-volume low-concentration waste gas through a water-based method. The waste gas treatment liquid for treating the large-air-volume low-concentration waste gas through the water-based method comprises a surfactant, a defoaming agent, a dissolution accelerant and water. Wherein the surfactant can be selected from any one or more of polyoxyethylene alkyl ether, polyoxyethylene alkyl ether and polyoxyethylene fatty acid ester; the dissolution accelerant can be selected from any one or more of ethylene glycol monobutyl ether, diethylene glycol monobutyl ether and triethylene glycol monobutyl ether; the defoaming agent is any one or more of butanol, dimethyl silicone oil, silicone and polyether modified polysiloxane. When the waste gas absorption liquid obtained in the invention is used for treating waste gas, the absorption efficiency of methanol, butanol, benzene, toluene, xylene, ethyl acetate, dichloromethane and acetone is obviously improved, and the absorption efficiency of the waste gas absorption liquid on aromatic hydrocarbon, halogenated hydrocarbon, alcohol, ketone and ester pollutants is improved.

The invention relates to an absorbable bone hemostasis and repair stent. The absorbable bone hemostasis and repair stent comprises the following raw materials in parts by weight: 15-60 parts of an excipient, 15-60 parts of a softening agent and 5-70 parts of a bone repair promoting component, the excipient is prepared from a polyoxyethylene-polyoxypropylene copolymer; the softening agent comprises a semi-solid mobile phase polymer; the bone repair promoting component comprises a coating and a core, the coating comprises a polylactic acid-glycolic acid copolymer, zinc stearate and potassium bromide, the core comprises calcium phosphate particles, and the coating wraps the surface of the core. The preparation method comprises the following steps: preparing the bone repair promoting component; and preparing the absorbable bone hemostasis repair stent. The absorbable bone hemostasis and repair stent is high in hemostasis and collapse resistance and has good inflammation regulation and bone repair promoting effects. The absorbable bone hemostasis and repair stent can be used for bone hemostasis and bone repair promotion of any bone injury wound.

The invention relates to a high-efficiency low-toxicity fireproof heat-insulation composite coating and a preparation method thereof, and the preparation raw materials of the high-efficiency low-toxicity fireproof heat-insulation composite coating comprise the following components in parts by weight: 20-30 parts of modified polysiloxane, 15-25 parts of ammonium polyphosphate, 8-15 parts of melamine, 15-28 parts of an inorganic filler, 10-15 parts of water, 5-10 parts of a cosolvent, and 1-3 parts of a functional auxiliary agent. The modified polysiloxane is an A-B-C type three-section type block copolymer, wherein the A section is a polydimethylsiloxane or methyl phenyl siloxane block; the segment B is an organic silicon chain segment containing a phosphazene structural unit; and the segment C is a polyethylene glycol or polyoxyethylene block. According to the invention, the modified polysiloxane is cooperated with the ammonium polyphosphate salt and the melamine, so that the composite coating has the effects of high-efficiency fire prevention and heat insulation, low toxicity, environment friendliness and excellent film forming performance.

The invention relates to a power-on adhesive tape capable of losing adhesion and a preparation process thereof. The power-on adhesive tape comprises a base film, a conductive layer and an adhesive layer, the adhesive layer is prepared from the following raw materials in parts by mass: 40 to 50 parts of acrylate copolymer, 3 to 5 parts of terpene resin, 0.2 to 0.5 part of initiator, 20 to 30 parts of solvent, 3 to 5 parts of pyridine modified reduced graphene oxide, 8 to 10 parts of hydroxypropyl-beta-cyclodextrin, 2.0 to 2.4 parts of 1-(2-aminoethyl) ferrocene and 4 to 5 parts of polyethylene glycol diacrylate. The component A is prepared from the following components in parts by weight: 0.5 to 0.8 part of polyoxyethylene-polyoxypropylene-polyoxyethylene triblock copolymer, 0.2 to 0.5 part of benzotriazole antioxidant and 1 to 2 parts of polycarbodiimide; the raw materials of the acrylate copolymer comprise a soft monomer and a hard monomer in a mass ratio of (2.5-3.5): 1. The power-on viscosity-loss adhesive tape is high in peel strength and high in power-on viscosity-loss sensitivity.

The application relates to the field of graphene oxide, and discloses modified graphene oxide, which comprises graphene oxide and grafted polyoxyethylene chains, the chemical formula of the polyoxyethylene chains being -CH2CH(OH)CH2O(CH2CH2O) n CH2CH2OH, wherein n is any integer of 3-20; the grafting rate of the polyoxyethylene chains in the modified graphene oxide is 30-50%. The modified graphene oxide has good salt resistance, can resist acid / alkali aqueous solutions, and effectively inhibits the accumulation and agglomeration of graphene oxide.

The present invention provides means with which bile acids, phenols, indoles and organic acids contained in a sample can be stably preserved without cryopreservation of the sample. A sample preservation solution of the present invention is a sample preservation solution used for analyzing at least one component selected from the group consisting of bile acids, phenols, indoles and organic acids contained in a biological or environmental sample, containing at least the following (A) and (B): (A) condensed phosphate or polyoxyethylene sorbitan alkylate; and (B) guanidinium thiocyanate, Tris-HCl (pH 7 to 9), and EDTA.

To provide an oil-based ink composition for a ball-point pen capable of obtaining good handwriting with good writing feeling even in writing at a high speed or at a high writing pressure while effectively suppressing ink leakage, and hardly causing strike-through, and to provide a ball-point pen.SOLUTION: A ballpoint pen refill for an oil-based ballpoint pen includes an ink reservoir tube, an oil-based ink composition filled in the ink reservoir tube, and a ballpoint pen tip attached to a front end portion of the ink reservoir tube and configured to supply the oil-based ink composition, wherein the oil-based ink composition contains a first phosphoric acid ester which is a polyoxyethylene hydrocarbon phosphoric acid ester having a hydrocarbon group having 4 or more and 17 or less carbon atoms, a second phosphoric acid ester which is a polyoxyethylene hydrocarbon phosphoric acid ester having a hydrocarbon group having 18 or more and 24 or less carbon atoms, water, and a nonionic surfactant.SELECTED DRAWING: Figure 1

The application relates to the technical field of medical detection, in particular to a detection kit for total bile acid and a detection kit for total bile acid. The application adds polyoxyethylene-polyoxypropylene copolymer, Span 40 and oxide in R1, and adds EDTA-Na2 and sodium bicarbonate in R2, so that the stability and precision of reagents are effectively improved, and the situation that a negative value is generated in the detection process is solved.

This invention relates to a potassium ion-responsive hydrogel based on iminoboronic ester bonds, its preparation method, and its applications. The hydrogel is prepared using guanosine, 2-formylphenylboronic acid, and polyoxyethylenediamine. The diol of guanosine forms a borate ester bond with 2-formylphenylboronic acid, and the primary amine in the polyoxyethylenediamine forms an imino group with the aldehyde group of 2-formylphenylboronic acid. The bases of guanosine form a G-quadruplex under the influence of potassium ions. The hydrogel has a porous network structure. The preparation method is as follows: A mixed aqueous solution of guanosine, 2-formylphenylboronic acid, and polyoxyethylenediamine is heated to boiling to obtain a clear solution. After cooling, the solution is mixed with a potassium ion solution to prepare the potassium ion-responsive hydrogel based on iminoboronic ester bonds. Compared with the prior art, the hydrogel prepared by this invention exhibits both temperature and potassium ion responsive characteristics.

This invention relates to a method for preparing a nanozyme detection reagent for carbofuran residues in apples, belonging to the field of pesticide residue and food safety technology. Specific steps: (1) Prepare mesoporous polydopamine powder using polyoxyethylene-polyoxypropylene-polyoxyethylene triblock copolymer, dopamine hydrochloride, etc.; (2) Prepare a copper-manganese bimetallic carbon dot solution using citric acid, copper chloride, manganese chloride, and ethylenediamine; (3) Prepare the nanozyme detection reagent using the mesoporous polydopamine solution and the copper-manganese bimetallic carbon dot solution. Mesoporous polydopamine has a large specific surface area, providing numerous sites for carbon dot loading and effectively adsorbing carbofuran molecules. The copper-manganese bimetallic carbon dots give the nanozyme detection reagent good enzyme-like activity and generate pesticide concentration-dependent colorimetric and photothermal signals. This invention achieves mutual verification of dual-mode output signals, significantly improving detection reliability; and completes detection within 1.5 h.

The invention discloses high-wettability reactive nano-silver ink for flexible electronics and a preparation method and application thereof.The preparation method comprises the following steps that S1, silver citrate is weighed and placed in a container, ammonia water is added, and a mixture A is obtained; s2, adding a citric acid solution and organic alcohol into the mixture A to obtain a mixture B; s3, adding ascorbic acid into the mixture B, performing ultrasonic treatment, and filtering to obtain filtrate which is a mixture C; and S4, a surfactant is added into the mixture C, the surfactant is one or more than two of a polyoxyethylene acid ester surfactant, a polyether modified siloxane surfactant and a phenyl ether surfactant, and the ink is obtained after ultrasonic filtration. The prepared ink has excellent stability, can realize low-level rapid sintering, and shows excellent wettability on a silicon substrate.

The invention belongs to the technical field of desulfurizer preparation, and particularly relates to a desulfurizer for oil extraction of oil and gas fields and a preparation method thereof. The desulfurizing agent for oil extraction of the oil and gas field is prepared from the following raw materials: N-octadecyl-1, 3-propane diamine, an ionic liquid and organic copper mixture, ammonium molybdate, lysine sodium, hydroxyethylidene diphosphonic acid, polyoxyethylene sorbitan monostearate and the balance of water. According to the desulfurizing agent for oil extraction of the oil-gas field, water is used as a solvent, N-octadecyl-1, 3-propane diamine, an ionic liquid and organic copper mixture and ammonium molybdate in raw materials are used as main desulfurizing components to remove organic sulfur and inorganic sulfur, and lysine sodium, hydroxyethylidene diphosphonic acid and polyoxyethylene sorbitan monostearate are added, so that the desulfurizing agent for oil extraction of the oil-gas field is obtained. Due to the synergistic effect of the raw materials, the efficient removal of inorganic sulfur and organic sulfur in oil extraction of an oil and gas field is realized.

This invention discloses a four-armed star-shaped polymer containing a polyoxyethylene structure, its preparation method, composition, and applications. The polymer is prepared by mixing an unsaturated organic carboxylic acid compound, an unsaturated sulfonic acid compound, and water, stirring to obtain a reaction solution, and continuously stirring and heating the reaction solution. An aqueous solution of a polyether macromonomer compound and the initiator aqueous solution are added to the heated reaction solution, followed by polymerization and purification. The polymer structure contains a large number of carboxyl groups, sulfonic acid groups, and ether groups, as well as abundant polyoxyethylene groups and alkyl chains, giving the polymer good water solubility and excellent chelating properties for metal ions. The polymer prepared by this method shows good effects in cleaning, defoaming, and scale inhibition. Furthermore, compositions formed by combining the polymer with other corrosion and scale inhibitors exhibit good compatibility and can be used for scale inhibition in high-hardness water.

The present application belongs to the technical field of pharmaceutical preparations, and specifically provides a compound SYN045 soft capsule and a preparation method thereof. The present application adopts a fixed proportion of plant oil and polyoxyethylene glyceryl oleate combination to prepare the content, which helps to reduce the degradation of SYN045 in the content drug solution, ensures the stability of the active ingredient, and obtains a compound SYN045 soft capsule with good drug dissolution, high drug content, low impurity generation, and high bioavailability. Further, through prescription optimization of the soft capsule shell, a fixed proportion of plasticizer is selected, the mass ratio of glycerol and sorbitol is 1:2-3, the transfer of the compound SYN045 to the soft capsule shell is reduced, and thus the quality stability problem of the soft capsule preparation product during drug storage is solved.

This invention discloses a chemical mechanical polishing (CMP) slurry. The raw materials of the CMP slurry include the following components: a water-soluble small molecule containing a morpholine ring, a water-soluble polymer with a main chain or side chain containing polyoxyethylene chains, an abrasive, an alkaline compound, and water. This technical solution can improve the edge collapse phenomenon of silicon wafers while achieving high flatness in the central region of the silicon wafer, thereby improving the overall surface flatness of the silicon wafer and meeting the needs of silicon wafer flatness in production.

The invention relates to the technical field of coatings, in particular to an MOFs enhanced nano ceramic coating material, a preparation method and application of the MOFs enhanced nano ceramic coating material to a heat insulation film. The preparation method comprises the following steps: firstly, coating the surface of Al2O3 / ZrO2 nano composite ceramic with ZIF-8 through an in-situ growth method to form MOFs enhanced nano ceramic composite powder with a core-shell structure; performing amino modification by using an amino silane coupling agent, and grafting polyacrylic acid by using an amidation reaction catalyzed by DCC / DMAP (dicyclohexylcarbodiimide / dimethylaminopyridine), so as to obtain surface carboxylated modified nano ceramic composite powder; and finally, mixing and dispersing the modified powder with organic silicon resin containing hydroxyl functional groups, a polyvinylpyrrolidone dispersing agent, a polyether modified polydimethylsiloxane flatting agent, a polyoxyethylene polyoxypropylene glycerol ether defoaming agent and ethanol to obtain the MOFs enhanced nano ceramic coating material. The coating has low thermal conductivity and high mechanical strength, and the powder has good dispersion stability in the coating, so that the coating can be widely applied to the field of heat-insulating films.

The present invention relates to a temperature-responsive in situ gelling composition comprising an amphiphilic triblock copolymer of polyoxyethylene-polyoxypropylene-polyoxyethylene (PEO-PPO-PEO), a water-soluble hydrophilic polymer, wherein the composition further comprises at least one lipid agent. The lipid agent is selected from the group consisting of a phospholipid, a sterol, a glyceride, a fatty acid or ester and derivative, a fatty alcohol, a cholesterol and derivative or a combination of more than one lipid agent. The present invention further relates to a vascular embolization agent comprising the temperature-responsive in situ gelling composition.

The invention discloses a method for detecting polysorbate 80 based on an MALDI-MS and UHPLC-Q-TOF / MS. The method comprises the following steps: taking a polysorbate 80 sample, preparing a polysorbate 80 solution by using acetonitrile, respectively carrying out MALDI-MS detection and UHPLC-Q-TOF / MS detection on the polysorbate 80 solution, and determining the content of the polysorbate 80 in the polysorbate 80 sample according to the MALDI-MS and UHPLC-Q-TOF / MS detection results. The method comprises the following steps: acquiring PS80 principal component distribution according to an MALDI-MS (Matrix-Assisted Laser Desorption Ionization-Mass Spectrometry) map: a polyoxyethylene chain delta m / z 44.0 + / -0.2 and an esterified derivative sodium adduct ion gradient peak cluster, and carrying out qualitative analysis on components of the polysorbate 80 in combination with a characteristic interval of m / z 44.0 + / -0.2 in the MALDI map; according to the retention time in the UHPLC-Q-TOF / MS detection result, identifying the monoester, diester and trace unesterified sorbitan in the polysorbate 80. According to the invention, molecular weight distribution analysis and component separation and identification of PS80 are realized.

The present application relates to the technical field of metal material chemical cleaning, and discloses an environment-friendly cleaning agent for degumming of a metal surface, comprising: tert-butyl hydrogen peroxide, diethylene glycol monobutyl ether, polyoxyethylene polyoxypropylene copolymer with a multi-branched structure, and deionized water, wherein the diethylene glycol monobutyl ether forms an associated structure with the tert-butyl hydrogen peroxide through hydrogen bonds; after the cleaning agent penetrates into the gap between the oxide film and the gum layer on the metal surface, the Lewis acid center of the oxide film competitively cuts the hydrogen bonds, induces in-situ decomposition of the tert-butyl hydrogen peroxide to release oxygen, and the interface pressure generated by the oxygen converts chemical energy into normal mechanical work, realizes whole peeling of the gum layer from the interface root, suppresses diffusion loss of the solvent in the gum layer body phase, and shortens the cleaning period without damaging the metal matrix.

The purpose of the present invention is to provide a composition having improved bioavailability of β-caryophyllene. Provided is a self-emulsifying composition comprising β-caryophyllene and one or more emulsifiers selected from the group consisting of polyglycerol fatty acid esters having an HLB value of 10 or more, polyoxyl glycerides, hydrogenated castor oil derivatives, and polyoxyethylene sorbitan fatty acid esters.

The invention relates to a low-carbon concrete preparation method based on low-temperature pyrolysis fly ash. The low-carbon concrete is prepared from the following raw materials in parts by weight: 250 to 270 parts of cement, 105 to 125 parts of modified fly ash, 550 to 570 parts of quartz sand, 130 to 150 parts of fly ash-based glass body, 1000 to 1200 parts of stone, 6 to 10 parts of functional additive, 10 to 20 parts of nano filler, 20 to 30 parts of composite expanding agent, 3 to 6 parts of retarder, 5 to 10 parts of hydroxypropyl methyl cellulose ether, 1 to 2 parts of polyoxyethylene polyoxypropylene ether and 170 to 200 parts of water. The prepared low-carbon concrete not only has excellent impermeability and corrosion resistance, but also has good mechanical properties and durability, the service life of the low-carbon concrete is effectively prolonged, meanwhile, carbon emission and energy consumption brought in the concrete preparation process are reduced, high-added-value resource utilization of solid waste is achieved, and the method is suitable for industrial production. And the circular economy concept is met.

The invention relates to the technical field of preparation of olefin by methanol conversion, and discloses an SAPO-34 molecular sieve, a preparation method thereof and application of the SAPO-34 molecular sieve in a methanol-to-olefin process. The method comprises the following steps: (1) mixing melamine with water to obtain a mixed solution of melamine and water, and then mixing the mixed solution of melamine and water with an aluminum source, a silicon source, a phosphorus source, a template agent and water to obtain a mixture; and (2) mixing the mixture obtained in the step (1) with polyoxyethylene sorbitan fatty acid ester, carrying out hydrothermal crystallization reaction, and then sequentially separating, drying and roasting the obtained molecular sieve stock solution. The prepared SAPO-34 molecular sieve can improve the catalytic activity and selectivity to low-carbon olefins in a methanol-to-olefin reaction, can accommodate more carbon deposits, can effectively delay the deactivation speed caused by the carbon deposits, and further significantly prolongs the service life of a catalyst, and the method has the advantages of simple process, mild reaction conditions and low cost, and is suitable for industrial production. The method has obvious economic value and wide application prospect.

The preparation method comprises the following steps: 1) dissolving polyoxyethylene polyoxypropylene in ethanol to prepare a template agent solution, adding a dopamine hydrochloride solution with the concentration of 0.5-20 mg / mL, mixing the two solutions, adding a pore-enlarging agent, carrying out ultrasonic treatment to form a uniform emulsion system, rapidly adding ammonia water drop by drop, carrying out ultrasonic treatment at the temperature of 60-80 DEG C, carrying out ultrasonic treatment at the temperature of 60-80 DEG C, and carrying out suction filtration; and continuously stirring at room temperature, reacting for 2-24 hours, centrifuging and washing to obtain the mPDA pesticide carrier. (2) dispersing the mPDA pesticide carrier obtained in the step (1) in ethanol and water, and carrying out ultrasonic treatment, so that the mPDA pesticide carrier is fully dispersed in the water to form a uniform and stable dispersion liquid; 3) adding a biopesticide into ethanol and pure water to completely dissolve the biopesticide to obtain a biopesticide solution, slowly dropwise adding the biopesticide solution into the dispersion liquid obtained in the step 2), and continuously stirring and reacting for 12-48 hours at room temperature; and 4) after the reaction is finished, collecting the precipitate, washing the precipitate with absolute ethyl alcohol, and drying the precipitate to obtain the mPDA pesticide preparation.

The present application provides a liposome having a double-layer membrane structure and use thereof. The liposome comprises a double-layer lipid membrane formed from (a) a phospholipid, (b) dipotassium glycyrrhizinate or a cationic surfactant, and (c) a polyoxyethylene sterol ether having a hydrophobic end embedded in the double-layer lipid membrane. The liposome of the present application has excellent stability and can be stably present in a formulation form. Furthermore, a liposome having a double-layer lipid membrane structure with excellent stability can be obtained without using a polyol.

The present application relates to a solid dispersion of ticagrelor and its preparation method and application. The solid dispersion of ticagrelor comprises the following components: (a) an active ingredient, the active ingredient comprising ticagrelor and / or a pharmaceutically acceptable salt thereof; (b) a carrier, the carrier comprising a pharmaceutically acceptable high molecular polymer; and (c) a surfactant, the surfactant comprising a polyoxyethylene nonionic surfactant. The solid dispersion of ticagrelor of the present application has significantly improved dissolution and increased bioavailability.

The present application relates to a water-soluble epoxy-terminated block copolymer, its preparation method and application, a hair styling composition and a corresponding hair styling spray and its use. By designing and synthesizing a water-soluble polymer with polyoxyethylene segments and polydimethylsiloxane segments arranged alternately, the water-soluble polymer is dispersed in water to play the effect of thickening, emulsification and rheological additive, which is beneficial to the atomization effect of the subsequent hair styling composition. In addition, the two ends of the water-soluble polymer are retained with epoxy groups, which can be cured and crosslinked with phenolic hydroxyl groups or carboxyl groups under heating conditions. The polymer film obtained by curing has better styling ability for hair, excellent mechanical properties, does not affect the gloss of hair, has better water resistance, can maintain the bonding ability between hair and the gloss of hair under the condition of soaking in water, and has higher reliability in actual use.

The invention provides a device for selectively capturing and separating lithium ions and a preparation method thereof, a roughened copper net is used as a substrate, mercapto polyoxyethylene azobenzene spirobipyridine is used as a capturing agent, and the capturing agent and the roughened copper net are combined through a Cu-S bond, so that the device for selectively capturing and separating lithium ions is obtained. And forming the Azo-2P-PEGn-SCu device which is supported by the roughened copper mesh and of which the surface is covered with the Azo-2P-PEGn-S fragments. The selective capture type lithium ion separation device provided by the invention has relatively good combination selectivity with the lithium salt, the separation of the lithium element does not depend on any crystallization process, and the separation percentage of the Li element is not less than 87%. The Azo-2P-PEGn-SCu device provided by the invention is regenerated by adopting light irradiation, no three wastes are formed in the regeneration process, and the regenerated Azo-2P-PEGn-SCu device still has relatively good selectivity on the lithium salt.

The application discloses a polishing composition with wide removal rate selectivity ratio and application thereof, which takes nanometer silica gel with surface-fixed organic acid as a main polishing component, adds hydrophobic surfactant containing cocoyl and polyoxyethylene-polyoxypropylene hydrophilic copolymer as a selectivity ratio regulator, and further adds acrylic acid homopolymer with a weight average molecular weight of about 1000-200000 and its salt and acrylic acid copolymer formed by polymerization of acrylic acid monomer. The polishing composition comprises a selectivity ratio inhibitor composed of two surfactants and a water-soluble polymer, is green and low-toxic, can realize wider polishing selectivity of silicon nitride, silicon oxide and polysilicon material, and can effectively inhibit generation of polishing defects.