163 results about "2-methylpropene" patented technology

The above-discussed and other problems and deficiencies of the prior art are overcome or alleviated by the improved bone connective prosthesis and method of forming the same of the present invention, comprising the addition of at least one biocompatible metal coupling agent to a prosthetic element, and then adding the biocompatible copolymerizer 2-hydroxyethyl methacrylate (“HEMA”) to the PMMA film and / or cement in an amount effective to enhance the cohesion between the prosthetic and the bone cement. In general, a PMMA / HEMA film is applied to the prosthetic element in the presence of a silane coupling agent by dipping, painting, spraying, etc.

The invention provides a composite low-phosphorus corrosion and scale inhibitor and application thereof. The composite low-phosphorus corrosion and scale inhibitor is prepared from a corrosion and scale inhibitor A and a corrosion and scale inhibitor B, wherein the corrosion and scale inhibitor A is prepared from 20-40 parts of polyepoxysuccinic acid (PESA), 20-40 parts of sodium gluconate and 20-60 parts of water; and the corrosion and scale inhibitor B is prepared from 10-25 parts of hydroxypropyl methacrylate (HPMA), 10-25 parts of acrylic acid / 2-acrylamido-2-methylacrylsulfonic acid copolymer (AA / AMPS), 5-10 parts of 2-phosphonobutyl-1,2,4-tricarboxylic acid (PBTCA), 10-25 parts of zinc salt, 1-2 parts of fluorescent tracer and 13-64 parts of water. The technical scheme is as follows: the corrosion and scale inhibitor A and the corrosion and scale inhibitor B in a weight ratio of 1:2 are compounded with water. The composite low-phosphorus corrosion and scale inhibitor has excellent corrosion and scale inhibition effects, and thus, the phosphorus content in the product is low, thereby reducing the phosphorus discharge and having favorable environmental protection performance.

The invention provides a composite phosphorus-free corrosion and scale inhibitor and its application. The composite phosphorus-free corrosion and scale inhibitor is composed of a corrosion and scale inhibitor A and a corrosion and scale inhibitor B, wherein the corrosion and scale inhibitor A is obtained through mixing polyepoxysuccinic acid (PESA), sodium gluconate and water; and the corrosion and scale inhibitor B is obtained through mixing hydrolytic polymaleic anhydride (HPMA), an acrylic acid / 2-acrylamide-2-methylpropanesulfonic acid copolymer (AA / AMPS), a zinc salt, a fluorescent tracer and water. The composite phosphorus-free corrosion and scale inhibitor, which compounds the corrosion and scale inhibitor A and the corrosion and scale inhibitor B according to a weight ratio of the corrosion and scale inhibitor A to the corrosion and scale inhibitor B of 1:2, has the advantages of excellent corrosion and scale inhibition effects, avoiding of a water eutrophication problem caused by phosphorus discharge, environmental pollution mitigation, and good environmental protection property.

The invention provides a preparation method for a novel graphene polyion liquid composite material. The method comprises the following steps of 1, preparing graphene oxide; 2, preparing ionic liquid 1-[(2-methylacryloyl)-ethyl-3-(MEBIm-Br); 3, using the 1-[(2-methylacryloyl)-ethyl-3-(MEBIm-Br) as imidazole ionic liquid to obtain the novel graphene polyion liquid composite material (rGO-poly-MEBOm-B and rGO-poly-MEBIm-Br). The obtained novel graphene polyion liquid composite material not only can be applied to the aspects of biological sensors, super-capacitors and the like and but also has the good performance on the aspects of adsorbing and separating pollutants.

Permselective asymmetric membranes suitable e.g. for hemodialysis, hemodiafiltration and hemofiltration of blood, and having improved sieving characteristics providing enhanced removal of middle molecular weight substances, e.g. inflammatory mediators having a molecular weight between 20 and 40 kDa. The membranes comprise polyethersulfone and polyvinylpyrrolidone and are coated with hyaluronic acid or copolymers of 2-methacryloyloxyethyl phosphoryl choline and other vinyl polymerizable monomers. Processes for the preparation of these membranes, devices comprising these membranes, and the use of these membranes in hemodialysis, hemodiafiltration and hemofiltration of blood, as well as in bioprocessing, plasma fractionation and the preparation of protein solutions.

The invention provides a polymer microgel and preparation method thereof. The polymer microgel comprises segmented copolymer containing poly (L-glutamic acid) repeat unit; the preparation method of the microgel includes that: aminated poly (ethylene glycol methyl ether) or aminated polyethylene glycol is taken as initiator, ring-opening reaction of gamma-phenmethyl-L-glutamate-N-inner carboxylic acid anhydride is carried out and phenmethyl protection is removed, thus synthsizing poly (ethylene glycol methyl ether)-b-poly (L-glutamic acid) or poly (L-glutamic acid)-b-polyethylene glycol-b-poly (L-glutamic acid), then condensation reaction is carried out to prepara 3-phenyl-2-propenyl or 2-methacryloxyethyltrimethyl functionalized poly (ethylene glycol methyl ether)-poly (L-glutamic acid) segmented copolymer or polyethylene-poly (L-glutamic acid) segmented copolymer, and finally UV-irradiation crosslinking is utilized to prepare polymer into gel. The polymer microgel has pH and ionic strength sensibility.

The invention belongs to the technical field of preparation of ceramic dispersants, and discloses a polycarboxylic acid type ceramic dispersant as well as a preparation method and application thereof. The preparation method comprises the steps of mixing 3-dimethyl(methacryloyloxyethyl) ammonium propane sulfonate, acrylic acid, a neutralizing agent and a chain transfer agent by agitating; heating to reach a temperature of 60 to 90 DEG C to obtain a mixed solution I; dropwise adding an initiator solution into the mixed solution I; heating to obtain a mixed solution II; adding a chain terminator into the mixed solution II; stopping heating; cooling by agitating until reaching room temperature so as to obtain the polycarboxylic acid type ceramic dispersant. The polycarboxylic acid type ceramic dispersant has an obvious reinforcement effect for ceramic biscuits; with the adoption of the polycarboxylic acid type ceramic dispersant, the application of a reinforcing agent can be decreased; quaternary ammonium cations are introduced to a main chain of polycarboxylic acid, so that the hydration capacity and heat stability of the polycarboxylic acid type dispersant can be improved; the preparation method has the advantages that the reaction is carried out under mild conditions, the synthesis process is simple, and the industrial production is easily carried out.

The invention relates to the technical field of sublimation transfer printing, discloses self-adhesive quick-drying sublimation transfer printing digital paper. The paper includes, from the bottom to the top, a base material sheet (1), a hydrophobic layer (2), a water-absorbing layer (3), an ink-absorbing layer (4) and a net-shaped surface layer (5), wherein the water-absorbing layer (3) includes interspace holes and is made of acrylic acid-2-acrylamide-2-sodium methacrylate copolymer; the net-shaped surface layer (5) is prepared from, in parts by weight, 25-45% of polyvinyl alcohol-vinyl acetate copolymer and 55-75% of sodium carboxymethyl cellulose; holes are formed in the hydrophilic end of the water-absorbing layer, so that the water contained in the ink can be adsorbed into the holes, and the beneficial effect that the ink can dry quickly after being transferred to a medium material is achieved. According to the invention, the net-shaped surface layer (5) structure facilitates quick absorption of the ink during the printing process; during the transferring process, the net-shaped surface layer can realize maximized adhesion to the medium material; the technical problems that the pattern is blurred or overlapped with another because of easy displacement during the printing ink absorption and transferring processes are solved.

The invention provides a low-smoke, halogen-free and flame-retardant cable material and a preparation method thereof. The material is prepared from the following raw material by weight parts: 34-38 parts of ethane-vinyl acetate copolymer, 24-27 parts of linear low-density polyethylene, 12-14 parts of ABS, 2-3 parts of zinc oxide, 50-54 parts of attapulgite powder, 12-14 parts of aluminium hydroxide, 1-2 parts of an antioxidant OD, 1-2 parts of an antioxidant ODA, 1-2 parts of an accelerator TETD, 5-7 parts of glycerol triglycerol ester, 3-4 parts of vinyl triethoxysilane, 1-2 parts of phenyl triethoxysilane, 3-4 parts of 2-methyl methacrylate, 1-2 parts of ethene diamine, 13-16 parts of carbon black N 220, 10-12 parts of carbon black N 339, 3-5 parts of polyethylene wax, 1-2 parts of ethylene bisstearamide, 1-2 parts of dimethyl tin dichloride, 4-6 parts of polyisobutylene and 6-8 parts of modified diatomite. According to the invention, the raw materials are reasonable in formula; the produced cable material is high in mechanical property, high temperature resistant, high in flame-retardant performance, and low-smoke and nontoxic during combustion, with a flame retardation grade being V2-V0.

The invention provides a high-temperature-resistant and cracking-resistant cable material and a preparation method thereof. The cable material is characterized by comprising the following raw materials by weight parts: 3-4 parts of stearic acid polyoxyethylene ester, 4-5 parts of nano-clay brick slag powder, 2-3 parts of vanadium diboride, 1-2 parts of zirconium diboride, 64-66 parts of linear low-density polyethylene, 12-14 parts of impact-resistant polystyrene, 6-8 parts of ABS, 2-3 parts of dibutyltin dilaurate, 2-3 parts of cyanuric acid zinc, 1-2 parts of zinc oxide, 2-3 parts of zine stearate, 3-4 parts of a silane coupling agent KH560, 42-46 parts of bauxite, 12-15 parts of bentonite, 1-2 parts of an accelerator DM, 1-2 parts of an antioxidant OD, 2-3 parts of a titanate coupling agent TMC-TTS, 3-4 parts of 2-ethyl methacrylate, 12-14 parts of carbon black N 220, 22-25 parts of carbon black N 660, 3-4 parts of beryllia and 6-8 parts of modified diatomite. According to the invention, the impact-resistant polystyrene is relatively good in high-temperature performance and thus can improve heatproof level of products, with the heatproof level being 150 DEG C. Furthermore, mechanical properties are improved, cracking problems are eliminated, and a flexibility of the cable material is high.

The invention relates to a non-phosphorus scale inhibition dispersant and the application thereof. The non-phosphorus scale inhibition dispersant is prepared by mixing the following raw materials by mass percent: 50-60% of sodium carbonate, 10-15% of polymaleic anhydride, 10-15% of acrylic acid / 2-acrylamide-2-methyl propylene sulfonic acid copolymer, 5-10% of natural organic macromolecule material, 2-5% of zinc salt, 1-2% of polyacrylamide and 10-20% of other components. The non-phosphorus scale inhibition dispersant and the application thereof have the beneficial effects that (1) the non-phosphorus scale inhibition dispersant has good environmental protection property; (2) the non-phosphorus scale inhibition dispersant is excellent in corrosion inhibition and scale inhibition, and good in environmental protection property; (3) the deposition of Ca3 (PO4) 2 filth of a circulating water system caused by phosphorous degradation can be avoided, so that the heat transfer coefficient of a cold exchange device is improved, and the energy consumption is reduced; (4) the non-phosphorus scale inhibition dispersant is high in tolerance to Ca and alkali, can resist the corrosion of high-concentration Cl<-> and SO4 <2-> and can adapt to high potential of hydrogen (pH), thus providing a technical condition for enabling circulating water to run under the condition of high concentration multiples and reducing sewage discharge.

The invention discloses a silicon dioxide hollow nano-structure and a preparation method thereof. Tetraethyl orthosilicate (TEOS) is taken as a precursor, polystyrene / 2-methacryloyloxyethyl trimethylamine chloride (PS / MTC) copolymer microspheres are taken as templates, and the shape of a product is controlled by the limiting function of spherical templates, so that the high-isotropy silicon dioxide hollow nano-structures of high-isotropy sizes can be synthesized in quantity at a relatively low temperature, and the problem of an overlarge dimension distributing range in the conventional process of synthesizing silicon dioxide is solved. The method is simple, has low cost and is suitable for large-scale industrial production, particularly for lubricating oil additives.

The invention provides an anti-aging heat radiation paint for an LED lamp, wherein the paint is prepared by the raw materials by weight: 25-28 parts of aniline presence of formaldehyde resin, 20-25 parts of E-12 epoxy resin, 6-8 parts of 2-methyl methacrylate, 3-4 parts of tetraethylenepentamine, 15-18 parts of aluminum nitride powder, 1-2 parts of graphite alkene, 1-2 parts of carbon nanotube, 4-5 parts of titanium dioxide, 1-2 parts of barium sulfate, 2-3 parts of zinc oxide, 4-5 parts of glycol, 2-3 parts of silane coupling agent KH-550, 10-12 parts of phthalate, 1-2 parts of chromic oxide(Cr_2O_3), 12-14 parts of ethyl acetate, 8-10 parts of xylene, and 4-5 parts of film-forming auxiliary agent. Aluminum nitride powder is added to make the paint have advantages of high heat conductive rate and good heat radiation effect; titanium dioxide is added to make the paint have excellent anti-aging effect; under daylight irradiation, the paint has advantages of sunlight resistance, no cracking, no color change, and acid and alkali resistance; graphite alkene and carbon nanotube are added to make the paint have advantages of easy construction, greatly enhance the heat conduction effect of the paint, and improve the pot-opening effect of the paint.

The invention discloses alkynyl hydroxypropyl cellulose and a preparation method and an application of a temperature-sensitive hydrogel of the alkynyl hydroxypropyl cellulose. In the invention, natural biology-based high-polymer hydroxypropyl cellulose is provided firstly, and is introduced into synthesis of a temperature-sensitive hydrogel material. The method for the temperature-sensitive hydrogel comprises the following steps of: (1) preparing azidopolycaprolactone-2-hydroxyethyl methylacrylate; (2) preparing poly(azidopolycaprolactone-2-hydroxyethyl methylacrylate-co-nitroisopropyl acrylamide); (3) preparing alkynyl hydroxypropyl cellulose; and (4) performing a click chemical reaction on the poly(azidopolycaprolactone-2-hydroxyethyl methylacrylate-co-nitroisopropyl acrylamide) and the alkynyl hydroxypropyl cellulose according to a certain proportion to obtain the temperature-sensitive hydrogel finally. The hydrogel provided by the invention has a unique structure and high mechanical strength, is biodegradable, and has a potential application value in the field of biological medicine.

The invention discloses a fluid loss agent for drilling fluid. A preparation method comprises the following steps of: adding 40g of deionized water into a reaction kettle, adding 2g of sodium carbonate into the kettle, stirring to dissolve the sodium carbonate, adding 5g of 2-acrylamide-2-methylpropenesulfonic acid into the solution for neutralization, pouring 15g of acrylamide and 0.6g of vinyl pyrrolidone into the neutralized solution in turn, stirring for dissolution, adding 0.1g of ammonium persulfate and 0.1g of sodium hydrogen persulfate into the solution in turn, stirring uniformly, transferring the solution to a kneading kettle for polymerization, pouring 2g of formaldehyde, 40g of sulfonated lignite and 40g of sulfomethylated phenolic resin into the kneading kettle, stirring uniformly, taking a polymerized material out, drying on drying equipment, crushing, and sieving by using an 80-mesh sieve. The fluid loss agent is suitable for various water base drilling fluids, high temperature deep wells and salt layers, and has the advantages of high temperature resistance and high salt resistance.

The invention relates to the technical field of thermal sublimation transfer printing, and discloses a piece of self-adhesive quick-drying thermal sublimation transfer printing digital cloth. The digital cloth sequentially comprises a piece of digital substrate cloth, an adhesive water-pervious layer, a water-absorbing layer, an ink-absorbing layer and a mesh-shaped surface layer from bottom to top, wherein the water-absorbing layer comprises mesopores and is an acrylic acid-2-acrylamide-2-sodium methacrylate copolymer; the mesh-shaped surface layer comprises a polyvinyl alcohol-vinyl acetate copolymer and sodium carboxymethyl cellulose; the digital substrate cloth has better strength than a paper substrate material, can be repeatedly used, the production cost is saved, and meanwhile, the production efficiency is improved; holes are formed in the hydrophilic end of the water-absorbing layer, so that moisture in ink is adsorbed into the holes, and the ink transferred to a dielectric material is quickly dried. The structure of the mesh-shaped surface layer facilitates quick absorbing of the ink in the printing process; in the transfer printing process, maximum adhesion of the mesh-shaped surface layer and the dielectric material can be realized, and the technical problem of double pattern imaging caused by the fact that the printing ink is prone to moving during absorption and transfer printing is solved.

The invention discloses a water retaining agent for liquid well cementing cement. The preparation method comprises the following steps: (1) putting 75.43 parts of distilled water in a reaction kettle, stirring and successively adding 17.5 parts of 2-methacrylamide-2-methyl propane sulfonic acid, 0.53 part of acrylamide and 0.7 part of maleic anhydride for abundant dissolution; (2) adding 3.8 parts of sodium hydroxide in the solution so that the pH value is regulated to 6-7, then adding 0.01 part of isopropanol, evenly stirring, and adding 0.175 part of ammonium persulfate in the kettle to stir for 5 minutes when heating to 48-50 DEG C; and (3) stopping stirring, then stirring and cooling when the temperature of the material liquid is raised to 80-90 DEG C, so as to react for 4 hours at the temperature of 80-85 DEG C, and inspecting by sampling so as to discharge the material. Because quadripolymer is added, the water retaining agent has the advantages of high temperature resistance and salt resisting property, thereby meeting the requirements of deep well and ultra-deep well cementing.

The invention belongs to the technical field of preparation of ceramic water reducers and discloses a cyclodextrin grafted copolymer type ceramic water reducer and a preparation method thereof. The water reducer is prepared from cyclodextrin or a cyclodextrin derivative, 3-(2-methylacryloyl ethoxyl dimethylamine) propanesulfonate, a chain transfer agent, an initiator, a chain terminator and deionized water. Due to a special molecular structure of cyclodextrin, the water reducer prepared by the preparation method has very good water-reducing and dispersing effects and meanwhile the water reducer which is amphoteric ionic polyelectrolyte is good in chemical property and thermal stability, strong in hydratability and insusceptible to the pH value of a solution. In addition, the water reducer prepared by the preparation method provided by the invention further has an enhancing effect on ceramic.

The invention discloses a method for grafting 2-methacryloyloxyethyl phosphorylcholine (MPC) polymer on a titanium-base material surface. A layer of middle bridging groups, namely organic phosphate or phosphate monoester which respectively forms chemical bonding with the titanium-base material surface and the MPC polymer is prepared on the titanium-base material surface and the MPC polymer by a self-assembled monolayer method; and the MPC polymer is grafted on the titanium-base material surface by a surface-initiated atom transfer radical polymerization method. In the prepared simulative functionalized titanium-base material of the method, the MPC polymer on the surface of the simulative functionalized titanium-base material has strong bonding force with the titanium-base material and has better histocompatibility and better blood compatibility. The invention has simple process and is easy to realize.

The invention discloses an aniline formaldehyde resin LED heat dispersion coating which is prepared from the following raw materials in parts by weight: 30-35 parts of aniline formaldehyde resin, 20-25 parts of polyamide imide prepolymer, 6-8 parts of methyl 2-methacrylate, 5-7 parts of tetraethylenepentamine, 15-18 parts of aluminum nitride powder, 1-2 parts of graphene, 1-2 parts of carbon nano tube, 2-4 parts of titanium dioxide, 1-2 parts of barium sulfate, 2-3 parts of zinc oxide, 12-15 parts of ethylene glycol, 2-3 parts of silane coupling agent KH-550, 5-7 parts of phthalate, 1-2 parts of chromium sesquioxide, 20-25 parts of ethyl acetate, 8-10 parts of p-xylene and 4-5 parts of film forming agent. The coating disclosed by the invention has excellent weather fastness, ultraviolet resistance, water resistance, oil resistance and alkali resistance; as aluminum nitride powder, graphene, carbon nano tube, titanium dioxide, barium sulfate and zinc oxide are added, the heat dispersion, the dispersibility and the ageing-resistant performance of the coating are improved and the coating can be used for a long period of time below 200 DEG C.

The invention belongs to the technical field of dispersing agent preparation, and discloses a novel zwitterionic polyelectrolyte dispersing agent, as well as a method and an application of the novel zwitterionic polyelectrolyte dispersing agent. The dispersing agent is prepared by the following steps: sequentially adding 100 parts by weight of 3-(2-methacryloyloxyethyl dimethylamino) propyl sulfonate, 2-10 parts by weight of a chain transfer agent and 500-1,000 parts by weight of deionized water to a reactor, and stirring and dissolving the raw materials, so as to obtain a mixed liquid; and dropwise adding 100-200 parts by weight of initiator liquid to react for 2-5 hours at 60-100 DEG C, stopping heating and cooling to room temperature, so as to obtain a colorless clear liquid, namely the zwitterionic polyelectrolyte dispersing agent liquid. The dispersing agent is good in coverage and encapsulation effects on the disperse particle surfaces, stable in dispersion system, good in chemical property and heat stability, and strong in hydration capacity, is hardly affected by pH value of the liquid, and can be applied to ceramic slurry dispersion, nano-powder dispersion and the like.

The invention discloses a method for preparing 2-methylacraldehyde and 2-methyl-2-pentenal synchronously, which is to prepare 2-methylacraldehyde and 2-methyl-2-pentenal by oxidizing 1-butene or n-butyl alcohol with an oxygen-containing gas and by subjecting the product of the oxidization to aldol condensation. In the method, the oxidization of the 1-butene or n-butyl alcohol and oxygen is performed in a reactor containing a solid catalyst, and the aldol condensation is performed in a reactor containing a liquid homogeneous phase catalyst. The method has the advantage that the production of 2-methylacraldehyde by using 1-butene or n-butyl alcohol as main raw material not only provides a new raw material source for the production of methyl methacrylate, but also provides a new method for deep processing and use of 1-butene or n-butyl alcohol.

The invention discloses a hydroxy propyl cellulose graft copolymer, a preparation method and an application thereof. The method comprises the following steps: in an acid aqueous solution, utilizing cerium salt to trigger hydroxy propyl cellulose to be grated with poly(2-methacryloyloxyethyl phosphorylcholine) (MPC), thereby introducing the MPC with an imitated biomembrane structure into the main chain of the hydroxy propyl cellulose; controlling reaction time to obtain anticoagulant hydroxy propyl cellulose derivatives with different grafting ratios; and utilizing an electrostatic spinning technology and adjusting solvent and relevant spinning condition parameters to obtain nanoscale cellulose fiber. The nanoscale HPC-g-PMPC fiber prepared in the invention has large specific surface area and biological functionality, thereby being capable of being applied to the biological medical fields of preparing anticoagulation non-woven fabrics, tissue engineering support materials, wound clad materials, medicine controlled release films and the like.

The invention relates to a wear-resistant UV (ultraviolet) photocuring paint which is prepared from the following raw materials in parts by weight: 30-35 parts of high-functionality aliphatic polyurethane acrylic resin, 4-6 parts of brown fused alumina powder, 13-18 parts of 2-methyl methacrylate, 4-7 parts of isoprene, 5-9 parts of polylactic acid, 2-4 parts of sodium silicate, 2-4 parts of isopropyl thioxanthene ketone, 2-3 parts of liquid rosin resin, 3-5 parts of ricinoleic acid, 2-4 parts of propenyl glycidol ether and 4-6 parts of assistant. By adding the brown fused alumina powder, the wear resistance and flame retardancy of the UV (ultraviolet) photocuring paint are enhanced, and the cost of the paint is lowered; and the paint has the advantages of high crosslinking and curing speed, uniform film formation, high strength, favorable toughness, favorable water resistance and favorable binding property. The assistant enhances the dispersivity of the paint, so that the UV (ultraviolet) photocuring paint has favorable leveling property and the coating formed by the piant is smooth and bright.

The invention belongs to the technical field of a building material, particularly relating to a polycarboxylic acid water reducer with strong cement adaptability, a synthesis method and a using method. The water reducer is composed of PEGMEMA, allyl polyethylene glycol (APEG), methacrylic acid (MAA), 2-acrylamide-2-methacrylonitrile sulfoacid (AMPS), mercaptans chain transfer agent, ammonium persulphate, sodium hydroxide and water. The specific steps are as follows: the APEG and the ammonium persulphate are respectively prepared into solutions the concentrations of which are 20-50%; meanwhile, the MPEGMA, the MAA, the AMPS and the mercaptans chain transfer agent are mixed and prepared into a monomer mixed solution; the prepared APEG solution is added into a kettle; nitrogen is introduced in; a condensation pipe is inserted; temperature rises to 60-100 DEG C; the monomer mixed solution and the ammonium persulphate solution are dropwise added, wherein the dropwise addition time of the monomer mixed solution is 1-5 hours, the dropwise addition time of the ammonium persulphate solution is 1.5-5.5 hours; after the monomer mixed solution and the ammonium persulphate solution are dropwise added, the mixture reacts for 0.5-1.5 hours at constant temperature; and the obtained mixture is cooled and evenly mixed to obtain the required product. The invention has the advantages of simple synthesis technology, stable performance of craft products, low dosage, good adaptability to cement and favourable market prospect.

The present invention relates to a preparation method of 3-chloro-2-methyl-1-propene, and the above-mentioned technical purpose is solved by the following technical solution: the preparation method of 3-chloro-2-methyl-1-propene, which It is produced by chlorine gas and 2-methyl propylene, and chlorine gas and 2-methyl propylene are cross-contacted in the reactor after spraying out from their respective pipelines. The present invention adopts that two kinds of gases are ejected from the pipeline and cross-contacted in the reactor, so it has good contact, and the amount of substances of the two gases is easy to control, so that the target of the reaction is enhanced, and the cross-contact time of the gases It has the characteristics of short reaction time, small side reactions and high yield.