233 results about "Polyurethane dispersion" patented technology

The invention relates to the technical field of functional coatings, in particular to an environment-friendly water-based strippable coating and a preparation method thereof.The environment-friendly water-based strippable coating is prepared from, by mass, 25%-45% of film-forming resin, 8%-20% of a stripping functional component, 10%-25% of a filler system, 3%-8% of a functional additive and the balance water, the stripping functional component is a ternary system of a wax emulsion, organic silicon modified acrylate and a fluorocarbon modified polymer, through collaborative design of the components, controllable stripping, no residue and no damage of a coating on various base materials such as metal, plastic and glass are achieved, meanwhile, the coating has excellent water resistance, weather resistance and environmental protection performance, and the coating can be widely applied to various substrates such as metal, plastic, glass and the like. The method is suitable for temporary protection in the fields of automobiles, electronics, precise instruments and the like.

The invention discloses a biological adhesion prevention nano-composite coating for a marine aquaculture netting and a coating process of the biological adhesion prevention nano-composite coating. The coating slurry is composed of a waterborne polyurethane dispersion, an antifouling functional filler and an auxiliary agent; the antifouling functional filler is nano microspheres formed by encapsulating capsaicin by using hydrogenated rosin as a wall material. The preparation method comprises the following steps: preparing the nano-microspheres through a specific process, and dispersing the nano-microspheres in water-based resin to obtain slurry; performing air low-temperature plasma pretreatment on the netting to improve the surface activity; and finally, coating the surface of the netting with the slurry and curing. The problems of dispersion and controllable slow release of natural hydrophobic antifouling components are solved through a nano packaging technology, and meanwhile, the ultrahigh adhesive force of the coating on a flexible hydrophobic base material is realized through a plasma interface activation technology. The two components have a synergistic effect, so that the coating has the outstanding advantages of environmental friendliness, long-acting antifouling property and firm adhesive force, and the technical bottlenecks that the traditional environment-friendly coating is easy to peel and short in service life are effectively overcome.

The invention discloses a modified waterborne polyurethane adhesive and a preparation method thereof, and relates to the technical field of adhesives. The carbon dioxide-based polycarbonate polyol is prepared from the following raw materials in parts by mass: 70 to 84 parts of carbon dioxide-based polycarbonate polyol, 8 to 9.6 parts of hexamethylene diisocyanate, 3 to 3.6 parts of isophorone diisocyanate, 0.01 to 0.012 part of dibutyltin dilaurate, 10 to 12 parts of N-methyl pyrrolidone, 3.5 to 4.2 parts of dimethylolpropionic acid, 0.1 to 0.5 part of 1, 3-butanediol, 0.1 to 0.5 part of a catalyst and 0.1 to 0.5 part of a catalyst. The adhesive is prepared from the following components in parts by weight: 1 to 1.2 parts of 1, 4-butanediol, 21 to 25.2 parts of modified polyurethane dispersion, 2 to 2.5 parts of silane-terminated dynamic cross-linking agent, 2.8 to 3.4 parts of triethylamine, 40 to 60 parts of acetone, 200 to 220 parts of deionized water and 10 to 12 parts of ethylenediamine aqueous solution. By introducing the modified polyurethane dispersion and the silane-terminated dynamic cross-linking agent, the base material universality, water resistance and temperature resistance of the adhesive are effectively improved.

The invention discloses water-based ink as well as a preparation method and a use method thereof, and relates to the field of ink preparation. Comprising the following steps: uniformly dispersing modified nano aluminum oxide, part of water-based acrylic resin emulsion, part of APEO-free wetting dispersant and part of deionized water, and sanding and dispersing until the fineness is less than or equal to 5 microns to obtain slurry; the preparation method comprises the following steps: uniformly mixing a water-based blocked isocyanate cross-linking agent, a flatting agent and part of ATBC to obtain a pre-dispersion; uniformly dispersing the water-based polyurethane dispersion, the defoaming agent, the rest deionized water, the water-based acrylic resin emulsion, ATBC and the APEO-free wetting dispersant to obtain a main resin emulsion phase; and slowly adding the slurry into the main resin emulsion phase, uniformly dispersing, slowly adding the pre-dispersion, uniformly dispersing, adding the thickening agent to adjust the viscosity of the system, and filtering to obtain the target product. The ink provided by the invention has ultralow VOC emission and excellent initial adhesion, adhesion resistance and long-term durability.

The invention provides a moisture-proof corrugated board and a production process thereof. The moisture-proof corrugated board comprises inner paper, core paper and surface paper which are sequentially arranged, and the surfaces of the inner paper and the core paper are coated with moisture-proof coatings; the invention relates to a preparation method of an anti-aging agent. The moisture-proof coating is prepared from the following raw materials: 35 to 45 parts of waterborne acrylic resin, 10 to 16 parts of fluorine modified shape memory polyurethane, 8 to 12 parts of waterborne polyurethane dispersion, 4 to 8 parts of bamboo charcoal loaded nano silver-zinc oxide composite particles, 3 to 6 parts of hydrophobic nano silicon dioxide, 5 to 9 parts of chitosan modified nano cellulose, 1.5 to 2.5 parts of silane coupling agent, 0.8 to 1.2 parts of dispersing agent, 0.2 to 0.4 part of defoaming agent and 0.5 to 0.9 part of wetting leveling agent. The corrugated board provided by the invention has excellent moisture resistance, mildew resistance and structural stability.

This application discloses a water-based sand texture paint and its preparation method, belonging to the field of water-based paint technology. The water-based sand texture paint of this application, based on 100% of the total mass of the water-based sand texture paint, includes: 1-1.5% mixed corrosion inhibitor, 1.5-3.5% film-forming aid, 10-15% water-soluble acrylic resin, 15-20% hydroxyl acrylic dispersion, 10-15% polyurethane dispersion, 10-15% precipitated barium sulfate, 10-15% glass micro powder, 0.2-0.5% coupling agent, 0.2-0.3% wetting agent, 0.3-0.5% dispersant, 0.1-0.3% defoamer, 5-10% color paste, 0.2-0.5% bentonite, 0.3-2.5% thickener, 5-7% sand texture powder, 8-10% expanded graphite, 0.5-1.5% activation period extender, and 15-20% water. The water-based sand texture paint prepared using the formula and preparation method of this application has a low odor during the coating process, is non-flammable and non-explosive, and has low toxicity, making it more suitable for widespread use, especially for use in the luggage compartment of passenger cars, with a wide range of applications.

To improve the adhesion of the coating film to the resin and the resistance of the coating films to blocking each other. [Solution] The polyurethane aqueous dispersion according to the embodiment comprises a polyurethane resin (A) containing a polyester polyol as a constituent component dispersed in an aqueous dispersion medium, and includes a carbodiimide group-containing compound (B) and a salt (C) of an acid and an alkali metal. The polyurethane resin (A) has carboxyl groups, and the salt (C) is at least one selected from the group consisting of bicarbonates, carbonates, monocarboxylates, dicarboxylates, tricarboxylates, and phosphates, and the salt (C) exists in an ionized state in the aqueous dispersion medium.

The present application provides a hybrid runway article comprising from top to bottom: (I) a topcoat layer made from a first composition comprising an externally emulsified polyurethane dispersion and rubber particles, wherein the externally emulsified polyurethane dispersion is derived from: (Ai) an isocyanate component comprising one or more compounds having at least two isocyanate groups, (Bi) an isocyanate-reactive component comprising one or more compounds having at least two isocyanate-reactive groups, (Ci) an optional catalyst, (Di) an external emulsifier, (Ei) a chain extender, and (Fi) water, and (II) a bottom layer made from a second composition comprising a 1K solventless polyurethane binder and rubber particles.

A double coating structure based on a multifunctional water-based low-temperature paint, and a coating system and the use thereof. The double coating structure comprises a first coating and a second coating, wherein the first coating comprises a mixture of a flaky metallic pigment and an inorganic oxide pigment; the second coating comprises a transparent organic color paste; and a first-coating paint composition used for the first coating and a second-coating paint composition used for the second coating are both mixtures containing an acrylic resin emulsion and a polyurethane dispersion. The double coating structure uses the technical solution of a pigment mixture and does not contain any curing agent such as an isocyanate; the obtained double coating structure has high radar wave transmission performance, high infrared reflection performance and high reflective insulation capacity, and is particularly suitable for black or silver paint systems; and since a water-based low-temperature paint is used, the double coating structure has the characteristics of significant low-temperature quick-drying film formation, a thin coating and a low VOC content, and can realize a coating process that has low energy consumption and is healthy and environmentally friendly.

The utility model relates to a kind of waterborne polyurethane dispersion pre-polymerization device, including support frame, speed reducer motor, support frame is installed from top to bottom sequentially installed four reaction cylinders, the top of each reaction cylinder is equipped with a feed pipe, the bottom of each reaction cylinder is equipped with a discharge pipe, a valve whether the discharge pipe is discharged is installed on each discharge pipe, the feed pipe of arbitrary one reaction cylinder is communicated with the valve on the discharge pipe of the reaction cylinder adjacent above it;A set of stirring paddle is rotatably installed in each reaction cylinder, the power output shaft of speed reducer motor is connected with one set of stirring paddle by coupling, and any two adjacent stirring paddles are driven connected by synchronous belt transmission pair;A temperature control switch and an electric heating jacket are installed on each reaction cylinder, and the wiring terminal of temperature control switch is connected with the power cord of electric heating jacket.The beneficial effect is: reduce the heat energy waste in the heating, cooling process of reaction cylinder itself in raw material repeatedly.

The invention relates to a waterborne polyurethane dispersion and application thereof. The aqueous polyurethane dispersion comprises a polyurethane and / or a polyurethane-urea and an aliphatic alcohol ester. The waterborne polyurethane dispersion disclosed by the invention not only can maintain the stability of dispersion emulsion under the condition of relatively low air temperature, but also can provide good initial heat resistance, so that the requirements of downstream application are met.

The present invention relates to a method of manufacturing shoe rubber outsoles using a special heat and pressure stable water-based polyurethane dispersion adhesive without the need for UV irradiation or plasma pretreatment, as well as a method of manufacturing shoes using shoe outsoles manufactured as described herein and PUD-based adhesive compositions for use in said method.

The invention discloses a polyurethane or polyurea aqueous dispersion with high humidity and heat resistance as well as a preparation method and application thereof. The aqueous dispersion is prepared by reacting the following components: a) polyester diol and / or polyol, b) di-and / or polyisocyanate which at least contains more than 50% by mass of toluene diisocynate, c) a monofunctional or polyfunctional polyethoxy chain segment-containing component which is synthesized by taking sodium methoxide as a catalyst and has reaction activity to isocyanate, and d) a polyethoxy chain segment-containing component which has reaction activity to isocyanate. D) a sulfonic acid type hydrophilic compound; e) a low molecular compound containing hydroxyl and containing at least two NCO reactive amino groups; wherein the ratio of the sodium ions in the component c) to the toluene diisocynate in the component b) is 10 ppm to 100 ppm. Sodium ions can catalyze a small amount of isocyanate groups to react with carbamate bonds to generate allophanate bonds in a polyurethane synthesis process, so that a trace cross-linked structure is introduced into a polyurethane chain segment, and the heat resistance / damp heat resistance of a product is improved.

The invention provides a low-temperature weather-resistant wear-resistant two-component waterborne polyurethane coating material as well as a preparation method and application thereof in PC (polycarbonate) glass, and belongs to the technical field of coating materials. According to the invention, polytetrahydrofuran glycol and polycaprolactone glycol are compounded as a soft segment, a hydroxyl modified waterborne polyurethane dispersion is constructed in combination with a hard segment of isophorone diisocyanate, and a hydrophilic modified hexamethylene diisocyanate tripolymer curing agent is utilized to reduce the reaction activity of isocyanate and water and optimize the structure of the soft segment, so that the hydrophilic modified waterborne polyurethane dispersion is prepared. The dosage of the coalescing agent is synergistically adjusted, so that compact formation of a cross-linked network at low temperature is realized; the composite light stabilizer and a polyurethane system have a synergistic effect, so that the long-term anti-ultraviolet performance is improved; through the wear resistance enhancer, the wear resistance and the adhesive force of the base material are synergistically improved; and the composite light stabilizer is utilized to cooperate with the adhesion promoter, so that the dispersion uniformity is improved, the anti-ultraviolet capability is enhanced, and the hardness and humidity and heat resistance of the paint film are cooperatively improved.

This application provides a novel waterborne non-isocyanate polyurethane (NIPU) dispersion comprising an NIPU prepared using an amidoamine, a cyclic carbonate, and a dispersing agent, as well as a method of making the waterborne NIPU dispersion.

The present application relates to a kind of modified polyurethane dispersions and its preparation method, the modified water-based polyurethane dispersion includes the following raw materials: polyisocyanate, macromolecular polyol, silicon diol, hydrophilic chain extender, modified monomer.The printed coating prepared by the modified polyurethane dispersion of the present application has excellent water wash resistance on silicone oil treated cloth.

The invention belongs to the technical field of coatings, and particularly relates to a multifunctional coating for plates and a preparation method thereof, and the preparation method comprises the following steps: (1) preparing amino silane coupling agent modified molybdenum disulfide nanosheets; (2) after 10-20 wt% of graphene oxide, inorganic nanoparticles and the modified molybdenum disulfide nanosheets react for a period of time, the remaining graphene oxide is added for continuous reaction, and graphene oxide modified molybdenum disulfide nanosheets are obtained; and (3) stirring and dispersing the graphene oxide modified molybdenum disulfide nanosheet and a waterborne polyurethane dispersion liquid, then adding an auxiliary agent, and uniformly mixing again to obtain the multifunctional coating for the plate. The graphene oxide and the inorganic nanoparticles are adopted to modify the molybdenum disulfide, the modified molybdenum disulfide nanosheets can be uniformly dispersed in the coating, a highly-crosslinked three-dimensional network structure is formed, and the corrosion resistance of the waterborne polyurethane coating is remarkably improved.

The application relates to the technical field of radiator surface treatment, in particular to an aluminum alloy radiator with a surface coated with heat dissipation paint and a preparation method thereof, wherein the heat dissipation paint comprises graphene composite paint and a protective coating; the graphene composite paint comprises the following components: 5-9 parts of water-based acrylic acid modified polyurethane dispersion, 2-6 parts of water-based acrylic acid emulsion, 30-40 parts of graphene oxide dispersion, 0.2-0.8 parts of wetting dispersant, 0.05-0.2 parts of defoaming agent, 0.05-0.3 parts of leveling agent and 3-7 parts of deionized water; and the protective coating comprises the following components: 10-20 parts of water-based acrylic acid modified polyurethane dispersion, 5-15 parts of water-based acrylic acid emulsion, 0.1-0.3 parts of alkyl glycoside, 0.5-1.0 parts of polyacrylamide, 0.2-0.6 parts of leveling agent and 4-8 parts of deionized water; the radiator has the advantages that the heat dissipation efficiency of the radiator can be improved, and the volume of the radiator is not obviously increased.

The present invention relates to an adhesive composition, the preparation and use thereof, and an article obtained by bonding with the composition. The adhesive composition comprises an aqueous anionic polyurethane dispersion and a uretdione group-containing polyisocyanate, wherein the aqueous polyurethane dispersion comprises a polyurethane polymer and water and wherein the polyurethane polymer is obtained by the reaction of a system comprising the following components: a) a polyisocyanate; b) an isocyanate reactive group-containing compound including a polyester polyol, wherein the polyester polyol is in an amount of greater than 10% by weight, relative to the total weight of the isocyanate reactive group-containing compound; and c) a chelating agent in an amount of 0.01% to 1.95% by weight, relative to the total weight of solid constituents of the composition. The adhesive composition of the present invention has good adhesion, good high temperature resistance and aging resistance.

The application provides a polyether amine sodium ethyl sulfonate with a structure as shown in formula (I). The application also provides a preparation method and use of the polyether amine sodium ethyl sulfonate. The polyether amine sodium ethyl sulfonate provided by the application has a novel structure, can be used as a chain extender and a surfactant of an aqueous polyurethane dispersion, has a simple preparation process, does not need to use high-toxicity and high-risk raw materials, is green and environment-friendly, has strong operability, has a simple post-treatment process, has multiple functions, is safe and simple to manufacture, is suitable for industrialized production, is favorable to improving preparation and application of the aqueous polyurethane, and thus has very important economic and social values, NaO3SCH2CH2NH-(CH2-CH2-O-) n -CH2-CH2-NH2 formula (I).

This invention relates to an aqueous polyurethane dispersion composition, an aqueous polyurethane dispersion, a preparation method, and applications. The composition comprises: 15-25 parts of a polyether soft segment polyol, 10-20 parts of a polycarbonate diol, 18-26 parts of an aliphatic or alicyclic isocyanate, 3-5 parts of a carboxyl-containing hydrophilic chain extender, 2-5 parts of ethoxylated trimethylolpropane, 0.3-1.0 parts of a phosphate-containing diol, 0.3-1.0 parts of a urea derivative chain extender, 1.5-3 parts of an organic amine neutralizer, 0.01-3 parts of a catalyst, and 25-40 parts of deionized water. The ethoxylated trimethylolpropane forms a branched structure encapsulating ester bonds, with the phosphate ester groups located at the chain ends, improving aluminum powder orientation. The urea derivative forms a reversible hydrogen bond network, balancing thixotropy. Compared with existing technologies, this invention solves the problems of poor hydrolysis resistance, insufficient aluminum powder orientation, and difficulty in balancing thixotropy in aqueous polyurethane.

The invention discloses a radiation refrigeration material, a preparation method and a preparation device, and the radiation refrigeration material comprises a primer layer, a middle paint layer and a finish paint layer, the primer layer is doped with titanium dioxide nano particles; the middle paint layer is doped with aluminum oxide or barium sulfate nanoparticles; and the finish paint layer is doped with silicon dioxide nanoparticles and a fluorescent material. The preparation method of the radiation refrigeration material comprises the following steps: S1, respectively preparing the primer, the intermediate paint and the finish paint through weighing, stirring, grinding and filtering processes; s2, the surface of an object is coated with primer, and a primer layer is formed; s3, the surface of the primer layer is coated with intermediate paint, and an intermediate paint layer is formed; and S4, the surface of the middle paint layer is coated with finish paint to form a finish paint layer. The radiation refrigeration material preparation device comprises a stirring barrel, a stirring shaft and a feeding pipe. According to the scheme, the spectral selectivity, durability, environmental friendliness and attractiveness of the refrigeration material can be effectively guaranteed.

The invention discloses environment-friendly water-based gloss oil for packaging and printing and a preparation method of the environment-friendly water-based gloss oil, and relates to the technical field of packaging and printing. The coating comprises the following components: 30-50 parts of an acrylate copolymer emulsion, 10-20 parts of a waterborne polyurethane dispersion, 3-8 parts of modified nano cellulose, 2-7 parts of an inorganic nanoparticle compound, 3-8 parts of a coalescing agent, 2-5 parts of a leveling wetting agent, 0.5-2 parts of a defoaming agent, 2-6 parts of a cross-linking agent, 3-8 parts of a wax emulsion, 0.5-2 parts of a pH regulator and 15-35 parts of deionized water. The acrylate copolymer and the waterborne polyurethane are compounded, and the modified nano cellulose and the inorganic nano particle compound are combined, so that the glossiness, the wear resistance, the adhesive force and the water resistance are improved in a balanced manner, and the performance is close to or even superior to that of the traditional solvent type gloss oil; the evaporation resistance of water is remarkably reduced, the drying time is shortened to be within 20 seconds, the water-based ink is suitable for high-speed printing equipment, and the production efficiency is improved.

This invention relates to a latex paint and its preparation method, belonging to the technical field of latex paints. The latex paint raw materials of this invention include raw material A and water. Raw material A, by mass, comprises: 40-60 parts of aqueous polyurethane dispersion A; the particle size of solid particles in aqueous polyurethane dispersion A is 1-2 μm; 10-20 parts of aqueous polyurethane dispersion B; the particle size of solid particles in aqueous polyurethane dispersion B is <0.5 μm; 0-10 parts of titanium dioxide; 10-20 parts of calcium carbonate; 0.5-5 parts of aqueous dispersant; 0.2-5 parts of defoamer; and 0.2-5 parts of thickener. The latex paint of this invention has excellent skin feel and good scrub resistance.

The invention discloses an insulating composite material for a new energy motor, and relates to the technical field of insulating materials. The composite material comprises four layers of structures: a first insulation paper layer, a first polyphenylene sulfide film layer, a second insulation paper layer and a second polyphenylene sulfide film layer. The insulation paper is prepared from a sulfate softwood natural-color wood pulp board, nano cellulose crystals and a bio-based waterborne polyurethane dispersion, and the problems that an existing insulation material is insufficient in interface bonding force and prone to aging and deterioration in damp and hot and chemical environments are solved through composition optimization and a composite technology. The composite material has excellent performances of high peel strength, damp-heat aging resistance, gearbox oil resistance, cooling liquid resistance, high electrical strength and the like, is suitable for new energy motors, and particularly meets the use requirements of oil-cooled motors.

This invention discloses a fluorine-free waterproofing agent and its preparation method, relating to the field of waterproofing agent technology. The preparation method involves mixing nano-silica with acrylate-terminated polydimethylsiloxane, octadecyl methacrylate, and methacryloxypropyltrimethoxysilane, followed by dropwise addition of azobisisobutyronitrile (AIBN) to obtain an organic-inorganic hybrid prepolymer acetone solution. Polycaprolactone diol, isophorone diisocyanate, and dibutyltin dilaurate react to prepare a polyurethane prepolymer. The mixture is then cooled and reacted with dimethylolpropionic acid and acetone, followed by further cooling, neutralization, and emulsification to obtain an aqueous polyurethane dispersion. This dispersion is then emulsified with the hybrid prepolymer, reacted with methyl methacrylate and hydroxyethyl acrylate, and finally reacted with glycerol polyglycidyl ether to obtain a composite emulsion. An antifoaming agent, leveling agent, and bactericide are added to the composite emulsion to obtain the fluorine-free waterproofing agent. The waterproofing agent of this invention provides durable waterproofing performance after being applied to fabrics.

The invention relates to a water-based anti-icing coating as well as a preparation method and application thereof. The raw materials of the coating comprise a component A and a component B in a mass ratio of (8: 1)-(9: 1), the component A is prepared from the following components in percentage by mass: 20 to 35 percent of hydroxy acrylic dispersion, 20 to 35 percent of polyurethane dispersion, 4 to 8 percent of organic silicon additive, 7 to 13 percent of low-freezing-point filler, 1 to 2 percent of wetting dispersant, 0.1 to 0.3 percent of defoaming agent, 9 to 27 percent of pigment filler, 0.05 to 0.15 percent of color paste, 1 to 5 percent of coalescing agent, 2 to 4 percent of matting agent, 0.2 to 1.0 percent of base material wetting agent, 0.4 to 1 percent of ultraviolet light absorber, 0.4 to 1 percent of light stabilizer, 0.1 to 0.3 percent of thickening agent and 4 to 13 percent of deionized water; and the component B comprises 78%-82% of a curing agent and 18%-22% of propylene glycol diacetate. The coating can be used for wind driven generator blades or photovoltaic frames.

An internally emulsified polyurethane dispersion, which is prepared by using a combined chain extender system of a hydrophilic amino siloxane compound and a polyetheramine compound, is provided. The internally emulsified polyurethane dispersion can be used to prepare a synthetic leather product having good anti-stickiness, wrinkle resistance, color fastness and superior mechanical properties. A laminated synthetic leather article prepared with said internally emulsified polyurethane dispersion as well a method for preparing the synthetic leather article are also provided.

The invention relates to the technical field of textile printing and dyeing, in particular to color matching paste for hand-drawing printing and dyeing of gambiered canton silk and a preparation method of the color matching paste. The color matching paste comprises a waterproof agent, a binder, a penetrant, polyurethane resin, a dye and deionized water, wherein the waterproof agent comprises a water-based fluorocarbon modified polyurethane dispersion, nanoscale silicon dioxide aerogel and a reactive cross-linking agent. By optimizing the formula of the waterproof agent, the color matching paste is perfectly compatible with the traditional gambiered canton silk process while maintaining excellent anti-blooming performance, and the beneficial effects of fine and clear patterns, consistent front and back color development and soft and comfortable hand feeling are achieved.

This utility model belongs to the field of polyurethane processing, specifically a high-speed polyurethane dispersion kettle, including a dispersion kettle body with a connecting valve on the inner side. By setting up a first motor, pulleys, a belt, and a first stirring rod, and through the slotting of the cylindrical groove on the inner side of the dispersion kettle body and the horizontal placement of the first stirring rod, the first motor drives one pulley to rotate, which in turn drives the belt to rotate, which in turn drives the other pulley to rotate, causing a rotating plate to rotate. This rotating plate then causes the stirring blades of the first stirring rod to rotate up and down, ensuring that the distance between the stirring blades of the first stirring rod and the upper and lower sides of the cylindrical groove on the inner side of the dispersion kettle body is equal. This results in more frequent contact between the first stirring rod and the lower polyurethane, and the first stirring rod causes the lower polyurethane to rise and mix with the upper polyurethane, making the mixing more uniform and improving the mixing stability of the device.