495 results about "Polyurethane dispersion" patented technology

The invention discloses durable metal gel as well as a preparation method and application thereof, and belongs to the technical field of conductive elastomers and composite materials. The preparation method comprises the following steps that S1, a liquid metal-waterborne polyurethane mixed solution is prepared, specifically, liquid metal and waterborne polyurethane dispersion liquid are mixed and dispersed, and the liquid metal-waterborne polyurethane mixed solution is obtained; and S2, drying treatment is conducted, specifically, the liquid metal-waterborne polyurethane mixed solution is dried, and the durable metal gel is obtained. The durable metal gel disclosed by the invention has both metal-grade electronic conductivity and durability.

A “Passive Radiative Coating” (PRC) is designed to dissipate heat generated mainly by solar radiation, intended for use in the manufacture of overhead conductors and cables. Additionally, this coating can dissipate heat produced by the conductors themselves, known as the Joule effect, providing environmental protection and significantly improving heat dissipation capacity. The PRC is composed of at least one filler, at least one binder, and at least one surfactant. In particular, the use of calcium carbonate and / or barium sulfate as fillers, and epoxy resins, alkyd varnishes, polyurethane dispersions, casting resins, silicone-based varnishes, and sodium silicate as binders are highlighted. The surfactant is used to stabilize the mixture and acts as a stabilization additive.

The invention provides a sound-insulation porous ceramic tile and a preparation method thereof, and belongs to the field of building materials. The sound-insulation porous ceramic tile is prepared from the following raw materials: 20 to 30 parts of kaolin, 18 to 22 parts of quartz sand, 12 to 18 parts of potassium feldspar, 3 to 7 parts of talcum powder, 3 to 7 parts of silicon carbide powder, 2 to 4 parts of ferrosilicon alloy powder, 0.5 to 1.5 parts of sodium bicarbonate, 3 to 5 parts of hollow glass beads, 1 to 3 parts of zirconium oxide microspheres, 1 to 3 parts of silicon dioxide aerogel particles, 3 to 5 parts of acrylate emulsion, 1 to 3 parts of butadiene styrene rubber emulsion, 0.5 to 1.5 parts of polyvinyl alcohol solution and 1 to 2 parts of polyurethane dispersion. The composite material comprises the following components in parts by weight: 30-60 parts of polypropylene, 0.3-0.7 part of a dispersing agent, 0.2-0.4 part of a defoaming agent, 0.8-1.6 parts of reinforced fibers and 9-13 parts of deionized water. The raw materials of the porous ceramic tile are reasonably designed, the sound insulation performance of the porous ceramic tile is improved, and full-band efficient sound insulation is achieved.

The invention relates to the technical field of polymer composite materials, and discloses an excimer skin-touch coating and a preparation method thereof.The coating is prepared from polyurethane dispersoid, organic silicon modified acrylic resin, a skin-touch additive, inorganic pigment filler, a solvent and a functional additive, the preparation method comprises the following steps: compounding base materials of polyurethane and organic silicon modified acrylic resin to form an interpenetrating network skeleton, then introducing a skin feeling auxiliary agent and a pigment filler step by step to realize gradient dispersion, and finally finishing system optimization through the synergistic effect of rheological regulation and functional auxiliary agents. Through a molecular structure interpenetrating network, intelligent process control and environmental protection technology integration, the core problems of easy touch attenuation, strong environmental sensitivity, auxiliary agent migration, pollution emission and the like of a traditional skin-touch coating are solved. The technology of gradient copolymerization anchoring, humidity dynamic compensation, closed-loop process control and the like is creatively fused, and multiple breakthroughs of long-acting skin feeling, high environmental adaptability and green production of the coating are achieved while excellent mechanical performance is kept.

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 water-based colored paint for automobiles as well as a preparation method and application of the water-based colored paint. The water-based colored paint is prepared from the following raw materials in parts by weight: 10 to 15 parts of water-based polyurethane dispersion, 5 to 9 parts of water-based hydroxy acrylic acid dispersion, 4 to 8 parts of melamine formaldehyde resin, 2 to 4 parts of color paste, 1 to 2 parts of aluminum paste, 2 to 3 parts of pearlescent pigment, 15 to 30 parts of deionized water and an organic solvent, the organic solvent comprises 6-8 parts of a high-boiling-point alcohol ether solvent and 2-4 parts of a swelling type solvent. The water-based colored paint for the automobile, provided by the invention, is generally used for coating an outer plate and an inner plate of an automobile body, and can be used for well improving the appearance of a coating film formed by spraying the inner plate and overcoming the problems of gloss loss and the like of the coating film when a static-free compressed air machine arm is used for spraying the inner plate of the automobile body.

The invention discloses a waterborne polyurethane adhesive and a preparation method thereof, and belongs to the technical field of high polymer materials. The waterborne polyurethane adhesive provided by the invention comprises a main agent and a curing agent, and most of raw materials of the main agent and the curing agent are waterborne materials, such as a waterborne polyurethane dispersion, a waterborne acrylic emulsion, a waterborne EVA emulsion, a waterborne rosin resin emulsion, a waterborne terpene resin emulsion and waterborne isocyanate. Due to the water-based materials, the adhesive has the characteristics of low VOC (volatile organic compounds), zero formaldehyde and low odor. Moreover, the water-based isocyanate in the curing agent and the active hydroxyl in the main agent component can be subjected to addition polymerization reaction to form a cross-linked network polymer, so that the adhesive has relatively high cohesiveness and can meet the bonding requirement of the automotive trim.

The invention discloses a preparation method and application of a super-weather-resistant industrial heavy-duty anti-corrosion coating, and relates to the technical field of coatings, and the preparation method comprises the following preparation steps: step 1, formula preparation, step 2, raw material pre-dispersion treatment, step 3, filler functionalization treatment, step 4, self-repairing system preparation, and step 5, gradient curing. 35%-40% of bio-based epoxy resin, 25%-30% of organosilicone modified acrylate and 30%-35% of deionized water are added into a dispersion kettle in proportion, then a bionic antibacterial polypeptide coating, a waterborne polyurethane dispersion and a nano-clay modified leveling agent are added, interfacial tension is reduced through the surface activity effect, primary mixing of a main resin matrix and filler is achieved, and the main resin matrix and the filler are mixed uniformly; the subsequent grinding energy consumption is reduced, and the dispersion uniformity is improved, so that agglomeration caused by too high resin viscosity is avoided, and the salt fog resistance of the coating can be improved through the synergistic protection of the double microcapsules and the bionic antibacterial polypeptide coating.

The invention discloses a preparation method of a waterborne polyurethane dispersion with excellent corrosion resistance, which comprises the following steps: (1) firstly carrying out vacuum dehydration on polyol, a micromolecular polyhydroxy chain extender and a hydrophilic chain extender, and then adding polyisocyanate to carry out polymerization reaction; the preparation method comprises the following steps: firstly, adding an alkynyl silane coupling agent into a reaction kettle, then adding micromolecular diol, diol containing an alkynyl side chain and a micromolecular diamine chain extender, carrying out a chain extension reaction, and finally, adding a monoamino silane coupling agent, and carrying out an end capping reaction, so as to prepare a polyurethane polymer; (2) dispersing the polyurethane polymer solution into water to obtain a polymer emulsion; and (3) adding a dithiol compound and an initiator into the polymer emulsion, so that an alkyne group on a polymer side chain and a sulfydryl of thiol are subjected to a click coupling reaction, and the waterborne polyurethane dispersion with the side chain containing free sulfydryl is obtained. According to the invention, the micromolecular mercaptan corrosion inhibitor is grafted to a side chain of a waterborne polyurethane molecule, and the obtained waterborne polyurethane has significantly improved corrosion resistance.

The application provides a polyurethane chain extender and a high-strength polyurethane, and relates to the technical field of polyurethane.The polyurethane chain extender has the following structure, wherein R1 is C1-C6 alkylene, and R2 is H or C1-C4 alkyl.The polyurethane chain extender is applied to the preparation of polyurethane materials.Because of the presence of hydrogen bond elements, a large number of hydrogen bonds can be generated in the polyurethane, so that the mechanical properties of the polyurethane material are significantly improved, and the polyurethane chain extender can also be used as a chain extender in the preparation of water-based polyurethane dispersions.

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 belongs to the technical field of waterborne polyurethane dispersions, and particularly discloses a bio-based waterborne polyurethane printing adhesive and a preparation method thereof. The bio-based waterborne polyurethane printing adhesive is prepared from the following raw materials in parts by mass: # imgabs0. The bio-based waterborne polyurethane printing adhesive is prepared from bio-based polymer polyols, such as polytetrahydrofuran ether glycol and polypropylene glycol with 100% bio-based content, polycarbonate diol with 50-70% bio-based content, polyethylene glycol with 50-70% bio-based content, polyethylene glycol with 50-70% bio-based content and polyethylene glycol with 50-70% bio-based content, wherein the bio-based polymer polyols are similar to or completely identical to a petroleum-based structure; the characteristics of the traditional petroleum-based waterborne polyurethane printing adhesive are maintained; the prepared bio-based waterborne polyurethane printing adhesive has high bio-based content and is unique in the field of waterborne printing.

The invention discloses a high-barrier water-based paint for flexible packaging, and a preparation method and application thereof. The high-barrier water-based paint comprises two types of polyurethane resin, wherein one type of polyurethane resin is polyolefin type polyurethane which is a polyurethane dispersion formed by polymerizing polyolefin polyol and polyisocyanate; and the other one is hydroxyl-containing crystalline polyurethane which is a medium-high hydroxyl / high-crystalline polyurethane dispersion formed by polymerizing polyester polyol and polyisocyanate. The high-barrier water-based paint disclosed by the invention has excellent oxygen barrier property, moisture barrier property, adhesive force, flexibility, wettability, chemical resistance, steaming and boiling resistance and the like, and can be used for high-barrier flexible packaging of base materials such as paper and films.

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 relates to the technical field of composite resin coatings, in particular to a water-based composite resin coating and a preparation method thereof. According to the technical scheme, the waterborne polyurethane adhesive comprises the following components in parts by weight: 25-40 parts of waterborne polyurethane dispersion, wherein the waterborne polyurethane dispersion is prepared by reacting isophorone diisocyanate, poly (butylene adipate) glycol, dimethylolpropionic acid, ethylenediamine, polyethylene glycol monomethyl ether, triethylamine and nano cellulose. Through the triple synergistic effect of the nano-cellulose reinforced polyurethane phase, the montmorillonite crosslinked acrylic acid phase, the titanium dioxide and the graphene composite material, the balance of high hardness and high flexibility of the water-based paint is realized, the self-cleaning, antibacterial and corrosion-resistant functions are synchronously achieved, the water-based paint is long-acting and stable, the weather resistance is also remarkably improved to prolong the life cycle of the coating, and the water-based paint has a good application prospect. Excellent performance and environment-friendly value are realized.

The invention relates to an anti-cracking and anti-stripping coating and a preparation method thereof. The coating is prepared from the following components in parts by weight: 20 to 30 parts of acrylic acid modified epoxy resin, 15 to 25 parts of waterborne polyurethane dispersion, 5 to 10 parts of nano silicon dioxide, 3 to 8 parts of nano calcium carbonate, 10 to 15 parts of anti-crack microcapsules, 1 to 3 parts of silane coupling agent, 5 to 10 parts of polyether polyol, 0.2 to 1 part of defoaming agent, 2 to 5 parts of coalescing agent, 0.3 to 1 part of thickening agent, 0.1 to 0.5 part of flatting agent and 30 to 50 parts of deionized water. Wherein the capsule core of the anti-crack microcapsule is polyamic acid, the capsule wall of the anti-crack microcapsule is polyurea formaldehyde, a repairing material can be released when the coating cracks, and a three-dimensional network structure is formed through esterification reaction of carboxyl of the polyamic acid and hydroxyl of polyether polyol so as to repair cracks. After the nano filler is subjected to surface modification by the silane coupling agent, the binding force between the nano filler and a resin matrix is remarkably enhanced, and the crack resistance and the adhesive force of the coating are improved. Through the synergistic effect of the acrylic acid modified epoxy resin and the waterborne polyurethane, the coating has flexibility and wear resistance.

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.

The present invention provides a high-adhesion low-solvent coating and a preparation method thereof, belonging to the field of coatings. The present invention synergistically improves the performance of waterborne coatings through a variety of modification strategies: the phosphate groups of the phosphorylated waterborne polyurethane dispersion form coordination bonds with the substrate to enhance adhesion; the thiol groups react with unsaturated groups to construct a stable crosslinked network. Oxidation and amination of graphene quantum dots improve dispersibility and form hydrogen bonds and crosslinking points to enhance mechanical properties; quaternized cellulose nanocrystals improve compatibility, and double bonds participate in the crosslinked network to enhance structural stability; mercapto- and borate-group modified polydopamine strengthens the network strength and flexibility and improves the interfacial binding force. These mechanisms provide a solid foundation for the development of high-adhesion, low-solvent high-performance coatings.

The invention belongs to the technical field of stoving varnish door plates, and discloses a preparation process of a solid wood core stoving varnish door plate. The method comprises the following steps that polygonal solid wood strips are spliced into a solid wood plate blank, then hot press molding, double-face sanding and vacuumizing are conducted, then curing and sanding are conducted after the solid wood plate blank is soaked with a wood reinforcing agent, and a pretreated solid wood plate is obtained; and coating seal primer on the pretreated solid wood board, spraying white primer and grinding, spraying a layer of white primer and grinding, spraying three layers of finish paint, and finally spraying varnish and grinding, drying, polishing and sealing edges to obtain the solid wood core stoving varnish door board. The wood reinforcing agent is prepared from the hydrophilic nano silicon dioxide aerogel powder, the modified waterborne polyurethane dispersoid, the microencapsulated ammonium polyphosphate and other raw materials, and a synergist is introduced into a varnish layer, so that the hardness, cracking resistance, deformation resistance and fire resistance of a paint film are effectively improved. Therefore, the method has a wider application prospect.

A polyurethane-acrylic composition, and particularly, a polyurethane-acrylic composition that is environment friendly and exhibits low heat shrinkage, which is suitable for use as a waterproof coating for a construction structure, especially for a roof. The polyurethane-acrylic composition includes:—at least one aqueous acrylic polymer dispersion, preferably in an amount of 17-56 wt %, preferably 20-45 wt %, based on the total weight of the composition; and—at least one aqueous polyurethane dispersion, preferably in an amount of 4-30 wt %, preferably 4-10 wt %, based on the total weight of the composition; wherein the composition is free of a coalescing agent.

According to the double-component wall-floor-roof integrated micro cement and the preparation method thereof, the double-component wall-floor-roof integrated micro cement comprises a component A and a component B, and the weight ratio of the component A to the component B is (2-5): 1; the component A comprises Portland cement, special cement, sand, a filler, a water reducing agent, cellulose ether, a thixotropic agent, a defoaming agent, silica powder, a retarder and an anti-cracking agent; the component B is prepared from emulsion, nano silica sol, deionized water, a liquid defoaming agent and water-based color paste; the emulsion is a mixture of a water-based styrene / acrylate copolymer emulsion, an aliphatic anion fatty acid modified polyurethane dispersion and a bio-based self-extinction polyurethane dispersion in a ratio of 1: (0.1-1): (0.1-1). The micro cement disclosed by the invention can be directly brushed on a wall surface, a top surface and a ground surface, a seamless decoration effect is realized, the integrity of decoration and the continuous aesthetic feeling of space are ensured, and meanwhile, the micro cement also has high strength and good anti-cracking performance.

The invention belongs to the technical field of coatings, and particularly relates to a high-performance coating and a color steel plate prepared from the high-performance coating. The coating is prepared from the following components in parts by weight: 120 to 150 parts of waterborne polyurethane dispersion liquid, 5 to 15 parts of long-chain fluorine-containing silane coupling agent modified graphene, 10 to 15 parts of long-chain fluorine-containing silane coupling agent modified carbon nanotubes, 1 to 4 parts of long-chain fluorine-containing silane coupling agent modified hollow glass microspheres, 1 to 8 parts of auxiliaries and 50 to 100 parts of solvent. Two-dimensional sheet-shaped modified graphene, one-dimensional linear modified carbon nanotubes and zero-dimensional modified hollow glass microspheres are added into waterborne polyurethane to construct a three-dimensional space structure. A micro-nano structure is constructed on the surface of the coating in a manner of compounding point, line and surface fillers, so that the hydrophobicity of the coating is improved. The hollow glass microspheres have relatively low density, so that dispersion of the components can be promoted, and a three-dimensional micro-nano coarse structure can be constructed favorably, so that the coating achieves super-hydrophobic performance.

The invention relates to the field of complex bone defect treatment, and discloses a nano material with an efficient antibacterial effect and a preparation method thereof.The preparation method comprises the steps that ammonium bismuth citrate and luteolin are mixed and dissolved in formamide, the mixture is put into a reaction kettle to react, a reaction solution is obtained, and Bi-Lu CDs in formamide is obtained after centrifugation and filtration; mixing the MSN-coated Bi-Lu CDs with amino-modified mesoporous silica microspheres, centrifuging, dispersing in deionized water, and drying in vacuum to obtain pure MSN-coated Bi-Lu CDs powder; the preparation method comprises the following steps: preparing a polyurethane dispersion liquid from polyurethane, spraying the polyurethane dispersion liquid on a quartz plate to form a polyurethane film, and spraying MSN and Bi-Lu CDs powder on the polyurethane film to carry out metal spraying treatment; a second precipitate is obtained; drying in vacuum to obtain J-Bi-LuCDs M (at) Au powder; the problems that in the prior art, due to the fact that a pure carbon dot material lacks active diffusion power, the treatment effect on complex tissue defects and bacterial biofilms is still limited, and a precursor material is poor in biocompatibility, not prone to dissolution and low in bioavailability are solved.

The invention discloses a functional radiation refrigeration coating and a preparation method thereof, and aims to overcome the defects that after a water-based coating is formed, the stability is low under ultraviolet irradiation, the adaptability to a humid environment is limited, and the radiation refrigeration performance is low. The preparation method comprises the following steps that firstly, silane modified zinc oxide dispersion liquid is prepared; mixing the silane modified zinc oxide dispersion liquid with a beta-cyclodextrin solution, and performing ultrasonic uniform dispersion; and then adding the uniform dispersion liquid into the aqueous polyurethane dispersion liquid, continuing to add the poly (N-isopropylacrylamide) dispersion liquid and the thickening agent, and fully stirring. And finally, uniformly coating a substrate with the modified waterborne polyurethane dispersion liquid, and carrying out heating treatment to prepare the multifunctional radiation refrigeration coating. The waterborne polyurethane material obtained by the preparation method can be widely applied to the fields of automobile coatings, energy-saving coatings and the like.

The invention discloses a method for repairing cracks of cultural relics, a repairing coating and a method, and relates to the technical field of cultural relic repairing. The preparation method of the repair coating comprises the following steps: step 1, mixing isocyanate and a hydroxyl compound in an inert gas atmosphere, and reacting the isocyanate and the hydroxyl compound under a first reaction condition to generate a first intermediate product; step 2, adding a sulfhydryl compound into the first intermediate product to obtain a mixture, dropwise adding an oxidizing agent into the mixture under a second reaction condition, and reacting the mixture in the dropwise adding process to generate a second intermediate product; and 3, carrying out emulsification treatment and pH value adjustment on the second intermediate product to obtain a waterborne polyurethane dispersion liquid, and sequentially carrying out filtration and solid content adjustment on the waterborne polyurethane dispersion liquid to obtain the repair coating. The repairing coating disclosed by the invention has efficient self-repairing capability, and the repairing coating contains disulfide bonds, so that the repairing coating realizes fracture and recombination under mild conditions.

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.

The application discloses a single-component water-based polyurethane adhesive and a preparation method thereof. The single-component water-based polyurethane adhesive comprises the following components in parts by weight: 20-100 parts of a water-based polyurethane dispersion, 20-100 parts of a water-based VAE emulsion, 0.1-0.5 parts of a thickening agent, 0.1-0.5 parts of a wetting agent, and 0.01-0.05 parts of a defoaming agent. The single-component water-based polyurethane adhesive has the characteristics of excellent initial adhesion, low activation temperature, excellent heat resistance, aging resistance and wet heat resistance, and can be single-component brush coated, is very suitable for a manual coating process of an automobile interior steering wheel and other interior parts, and can greatly improve production efficiency and save cost.

The present invention relates to the technical field of adhesives, and specifically, to an aqueous polyurethane dispersion, a preparation method thereof and an application thereof. The components include: polyol, a diisocyanate monomer containing a polyethylene glycol chain segment, an isocyanate monomer, a chain extender and deionized water; the raw materials for preparing the diisocyanate monomer containing a polyethylene glycol chain segment include an isocyanate trimer and monomethyl polyethylene glycol, and the molecular weight of the monomethyl polyethylene glycol is 350-600. By adding the diisocyanate monomer containing a polyethylene glycol chain segment and introducing polyethylene glycol into the polyurethane side chain, the mechanical properties and thermal stability can be improved; by limiting the molecular weight of the monomethyl polyethylene glycol to 350-600, the flexibility and crystallization properties of the polyurethane chain segment can be balanced, and the particle size and particle size distribution of the dispersion can be further reduced.

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.