1324 results about "Polyurethane coating" patented technology

Provided are a nanocomposite polyurethane coating for aviation and a preparation method therefor. The coating is a product obtained by mixing a polyaspartic acid ester resin as a raw material with a fluorine-modified nano-SiO2 containing an active amine group and a fluorocarbon resin and reacting same. The nanocomposite polyurethane coating for aviation solves the problems of poor stain resistance, difficulty in cleaning, and poor toughness of existing aircraft skin coatings, and improves the toughness and ease of cleaning of the coating.

The invention discloses a bio-based polyurethane coating and a preparation method thereof, and belongs to the technical field of coatings. The bio-based polyurethane coating comprises the following raw materials in parts by weight: 100 parts of vegetable oil polyol, 70-120 parts of isocyanate, 10-25 parts of a flame retardant, 30-40 parts of an organic solvent, 1-5 parts of a catalyst, 10-30 parts of a hydrophilic chain extender, 10-30 parts of a neutralizer and 20-40 parts of deionized water. The preparation method comprises the following steps: adding plant polyol, isocyanate, a flame retardant, an organic solvent and a catalyst into a container, mixing and reacting to obtain a prepolymer mixed solution, then adding a hydrophilic chain extender, mixing and reacting to obtain a polymer mixed solution, cooling, then adding a neutralizer for neutralizing, then adding deionized water for emulsifying to form a polyurethane emulsion, and finally adding a curing agent for curing. And performing reduced pressure distillation to obtain the bio-based polyurethane coating. According to the invention, biomass-sourced acid reacts with the organosilicon compound to generate the flame retardant, and the prepared bio-based polyurethane coating has good flame retardant property.

The invention relates to the field of polyurethane coating processing, in particular to a waterproof bio-based polyurethane coating and a preparation technology thereof.The waterproof bio-based polyurethane coating is prepared from, by weight, 25%-40% of castor oil polyester polyol, 15%-25% of isocyanate, 5%-10% of bio-based polybasic acid, 0.2%-0.6% of a catalyst, 0.5%-1% of a chain extender, 15%-20% of modified nanofiller, 3%-5% of a wetting agent and 1%-2% of a curing agent. By adopting the formula, the prepared waterproof bio-based polyurethane coating has good weather resistance, high and low temperature resistance, strength and waterproofness, and can be used in Tibet, Xinjiang, Inner Mongolia, Qinghai and other regions for a long time without aging, and the service life of the waterproof coating is prolonged.

The invention discloses a double self-repairing polyurethane coating containing a metal coordination bond and a Diels-Alder bond. The double self-repairing polyurethane coating is prepared from the following raw materials: polyol, an isocyanate derivative, a chain extender containing the metal coordination bond, metal salt and a binary chain extender containing the Diels-Alder bond. According to the double self-repairing polyurethane coating containing the metal coordination bond and the Diels-Alder bond, the repairing efficiency and the mechanical and chemical resistance can be improved.

The invention relates to the technical field of polyurethane coatings, in particular to a hydrophobic flame-retardant polyurethane coating and a preparation method thereof. The preparation method comprises the following steps: firstly, taking 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and methallyl alcohol as raw materials, and reacting to obtain hydroxyl grafted phosphaphenanthrene; taking 1, 1, 3, 3-tetramethyldisiloxane and methallyl alcohol as raw materials, and reacting according to a molar ratio of 1: 2 to obtain dihydroxy siloxane; then cyanuric chloride, hydroxyl grafted phosphaphenanthrene and dihydroxyl siloxane react according to the molar ratio of 1: 1: (1.5-1.8), and the dihydroxyl-terminated silicon-containing flame retardant is obtained. The preparation method comprises the following steps: mixing a dihydroxyl-terminated silicon-containing flame retardant with polytetrahydrofuran ether glycol to serve as a soft segment, and reacting with isocyanate to obtain a hydrophobic flame-retardant polyurethane emulsion; mixing the hydrophobic flame-retardant polyurethane emulsion, an anti-aging agent, an ultraviolet light absorber, a defoaming agent, kaolin, nano silicon dioxide and talcum powder to obtain the hydrophobic flame-retardant polyurethane coating.

The present invention relates to a preparation method of an intelligent self-repairing, flame-retardant and light-resistant water-based polyurethane coating. The method comprises the following steps: preparing a self-made hyperbranched flame retardant and using it in the synthesis of a polyurethane prepolymer; cooling the mixture to 58° C., adding 2,2-dimethylolpropionic acid, reacting the mixture for 1 to 2 hours, adding 1 to 2 parts of a disulfide compound, reacting the mixture for 1 to 2 hours at 60 to 80° C., adding 1 to 2 parts of a hydrogen bonding agent, reacting the mixture for 1 hour at 60 to 80° C., adding 0.5 to 1.5 parts of a coumarin derivative, and reacting the mixture for 60 to 90° C. The mixture was stirred for 1-2 hours, and then spiropyran, diethanol monoisopropanolamine, and 0.01 parts of p-toluenesulfonamide were added, and the mixture was reacted at 50°C for 30 minutes. The temperature was lowered to 40-45°C, and 1-2 parts of triethylamine were added, and the mixture was reacted for 1-2 hours. The mixture was cooled to room temperature, and 60-65 parts of water were added. The mixture was stirred at a speed of 1800-2000 r / min for 0.5-1 hour to obtain an intelligent self-healing, flame-retardant, and light-resistant water-based polyurethane coating. The flame retardancy and self-healing properties of the obtained water-based polyurethane were significantly improved.

The invention discloses a temperature-resistant waterproof polyurethane coating and a preparation method thereof, and belongs to the technical field of polyurethane coatings, the temperature-resistant waterproof polyurethane coating comprises the following components by mass: 80-90 parts of a polyurethane prepolymer, 1-1.5 parts of a reinforcing filler, 2-3 parts of a composite curing agent and 7-9 parts of polyether glycol; the polyurethane prepolymer is prepared by the following steps: stirring and mixing a fluororubber grafted solution and polyester polyol in a reaction kettle, heating to 70-80 DEG C under the protection of nitrogen, adding an isocyanate mixture, and stirring and reacting for 2-3 hours to obtain the polyurethane prepolymer; according to the temperature-resistant waterproof polyurethane coating prepared by the preparation method disclosed by the invention, the-NCO group is terminated, so that the coating has good stability before curing, is not easy to react with moisture in air and has good moisture resistance before curing, and the fluororubber, the reinforcing filler and the polyurethane waterproof coating are mixed, so that a cross-linked network of the cured polyurethane waterproof coating is enhanced; the mechanical property and the temperature resistance of the cured polyurethane waterproof coating are improved.

The present invention relates to a preparation method of a flame-retardant, high-refractive-index, melt-drop resistant waterborne polyurethane coating. A diol, an isocyanate and dibutyltin dilaurate are added to a 500 mL flask, and the temperature is raised to 70-85 °C, and the mixture is stirred and reacted for 1-2 h to obtain a polyurethane prepolymer; then a charring agent is added to the polyurethane prepolymer, and the reaction is continued for 1-2 h; the temperature is lowered to 60 °C, and then 2,2-dimethylolbutyric acid and amino carbon nanotubes are added and reacted for 0.5-1 h; then a high-refractive-index material is added, and the reaction is carried out at 65-70 °C for 1-2 h, the temperature is lowered to 40 °C, and then triethylamine is added and reacted for 0.5-1 h; deionized water is added, and at a rotation speed of 2000 r / min, an ammonium polyphosphate solution is added, and high-speed shear emulsification is carried out for 0.5-1 h to obtain a flame-retardant, high-refractive-index, melt-drop resistant waterborne polyurethane coating. This polyurethane coating has high flame retardancy, high refractive index and no melt-dropping property.

The present invention provides the use of a drone, or remotely piloted aircraft, equipped with a system for applying paint or industrial coating with epoxy paint and / or polyurethane.Coating repair application system using remotely piloted aircraft, characterized by comprising remotely piloted aircraft (9), a portable painting system (2), (5), (7) and (8), linear guide (4), distance sensors (10), camera (11), remote control (12), battery (1), lattice structure (3).

The invention provides a preparation method of a self-repairing waterborne polyurethane coating based on a synergistic effect of a dynamic disulfide bond and a pH response microcapsule. The preparation method comprises the following steps: step 1, preparing a dynamic disulfide bond-containing waterborne polyurethane (D-WPU) emulsion; step 2, preparing a pH response microcapsule; step 3, preparing a self-repairing waterborne polyurethane coating; a dynamic disulfide bond of the self-repairing waterborne polyurethane coating rapidly repairs macrocracks at 50-60 DEG C through mercaptan catalysis, and pH < lt > is caused by local corrosion of a pH response microcapsule; when the pH value is 4.0, cysteine is released, sulfydryl accelerates recombination of dynamic bonds, and amino enhances cohesive force of the coating and neutralizes H < + >. And in combination with a hydrogen bond network of the nanocellulose, the coating has low-temperature repair (the mechanical strength recovery rate is greater than or equal to 90%), high toughness (the water absorption rate is less than or equal to 2.1%) and long-acting corrosion resistance (the salt spray resistance life is greater than or equal to 600 hours), and is suitable for severe environments such as ocean engineering and new energy equipment.

The invention discloses self-repairing waterborne polyurethane as well as a preparation method and application thereof. The polyurethane is prepared from the following raw materials through reaction: S1, one or more polyisocyanates; s2, one or more macromolecular polyols; s3, one or more micromolecule chain extenders; s4, a carboxylic acid type hydrophilic compound; S5, one or more amino-containing compounds; s6, one or more neutralizing agents; s7, water; and S8, an optional catalyst. According to the waterborne polyurethane provided by the invention, on the premise that the original performance of a polyurethane material is not influenced, a prepared waterborne polyurethane coating is endowed with continuous self-repairing performance under the mild condition without a catalyst.

The invention discloses a bio-based thermoplastic polyurethane coating material easy to degrade quickly and a controlled-release fertilizer. The coating material comprises 0.8-2.0 parts of a biological chain matrix and 0.5-1.5 parts of a chain reinforcing agent; the biological chain matrix is formed by mixing pre-oxidized vegetable oil diol and bio-based polyester diol; the chain reinforcing agent is formed by mixing a curing agent, a hardening agent and a toughening agent. The bio-based thermoplastic polyurethane coated controlled-release fertilizer comprises fertilizer particles and a bio-based thermoplastic polyurethane coating material sprayed on the surfaces of the fertilizer particles, the spraying amount of the bio-based thermoplastic polyurethane coating material is 0.8-10% of the mass of the fertilizer particles. By accurately regulating and controlling the formula of the film material, the physical properties such as tensile strength and toughness of the bio-based thermoplastic coating material can be jointly improved, so that a more excellent controlled release effect is achieved, and the contradiction between the degradability and the controlled release property of the existing bio-based polyurethane coating material is solved.

The invention provides a polyurethane waterproof coating, a preparation method and a waterproof product. The polyurethane waterproof coating comprises the following raw materials in parts by weight: 206 parts of a polyurethane prepolymer; the polyurethane prepolymer is formed by reaction of hydroxyl-terminated polybutadiene acrylonitrile, organic silicon dihydric alcohol, polyether polyol and polyisocyanate; and 3 to 7 parts of oxazolidine end-capped modified resin based on 206 parts of the polyurethane prepolymer; 6-12 parts of a latent curing agent; 40 to 85 parts of an epoxy plasticizer; and 130 to 300 parts of an additive. According to the polyurethane waterproof coating, organic silicon dihydric alcohol, hydroxyl-terminated polybutadiene acrylonitrile and polyisocyanate react to form an NCO-terminated prepolymer, oxazolidine-terminated modified resin contains terminal group oxazolidine, and the terminal group oxazolidine is hydrolyzed to release secondary hydroxyl and amino to participate in the reaction; the peeling strength of the waterproof material formed by compounding the polyurethane coating and the coiled material is improved.

The invention relates to an anti-corrosion treatment process for a ship lock steel structure. The anti-corrosion treatment process comprises the steps that S1, the surface of the ship lock steel structure is pretreated; s2, the surface of the pretreated steel structure is coated with an anti-corrosion coating containing graphene modified zinc powder to serve as primer; s3, the surface of the primer is coated with super-strong epoxy paint, intermediate paint is formed, and the super-strong epoxy paint is amine adduct cured high-solid epoxy finish paint; s4, the surface of the intermediate paint is coated with a polyurethane coating to serve as finish paint; by selecting proper paint as primer, intermediate paint and finish paint, one scheme is suitable for all areas and can resist corrosion for a long time, and finally the problem that different areas need to be constructed in different areas is solved. According to the anti-corrosion scheme, the adhesive force is high, the shielding property is high, the water resistance is good, and the ultraviolet resistance is high.

The invention discloses a microporous breathable fabric as well as a preparation method and application thereof, and relates to the technical field of fabric treatment. The invention discloses a preparation method of a microporous breathable fabric, which comprises the following steps: coating the surface of a base cloth with a polyurethane coating agent, and drying to obtain the microporous breathable fabric, the polyurethane coating agent is prepared from the following raw materials in parts by weight: 100 parts of organic silicon modified polyurethane emulsion, 8 to 11 parts of N, N-dimethylacetamide, 2 to 2.5 parts of n-caprylic alcohol, 5 to 8 parts of a foam homogenizing agent and 1 to 3 parts of a thickening agent PTF; the organic silicon modified polyurethane emulsion is obtained by crosslinking polyurethane with carboxymethyl cellulose through silica sol; the polyurethane coating agent prepared by taking the organic silicon modified polyurethane emulsion as the base material is coated on the surface of the base cloth, so that the fabric has high waterproof performance and also has high air permeability and moisture permeability; the microporous breathable fabric prepared by the invention is applied to the field of outdoor sportswear, and comfortable wearing experience is provided.

The invention belongs to the technical field of polyurethane coatings and coatings, and particularly relates to an anti-doodling polyurethane coating, a coating as well as a preparation method and application of the anti-doodling polyurethane coating, and the anti-doodling polyurethane coating comprises the following components in parts by weight: 15-30 parts of dimercaptomercaptan, 5-30 parts of polymercaptan, 0.20-0.6 part of a catalyst and 20-55 parts of isocyanate. The molecular weight of the dimercapto mercaptan is 154.32; and the molecular weight of the polymercaptan is 260.53. Polyurethane is prepared through reaction of dimercaptomercaptan, polymercaptan and isocyanate, the adhesion performance and anti-doodling performance of polyurethane on the surface of synthetic leather / leather are remarkably improved, industrial production is easy, and wide application prospects and market value are achieved.

The invention relates to a preparation method of a flame-retardant, high-refraction and melt-drop-resistant water-based polyurethane coating, which comprises the following steps: adding dihydric alcohol, isocyanate and dibutyltin dilaurate into a 500mL flask, heating to 70-85 DEG C, and stirring to react for 1-2 hours to obtain a polyurethane prepolymer; adding a charring agent into the polyurethane prepolymer, and continuously reacting for 1-2 hours; cooling to 60 DEG C, and then adding 2, 2-dimethylolbutyric acid and amino carbon nanotubes to react for 0.5-1 hour; adding a high-refraction material, reacting at 65-70 DEG C for 1-2 hours, cooling to 40 DEG C, adding triethylamine, and reacting for 0.5-1 hour; the preparation method comprises the following steps: adding deionized water, adding an ammonium polyphosphate solution at a rotating speed of 2000r / min, and carrying out high-speed shearing emulsification for 0.5-1h to obtain the flame-retardant, high-refraction and melt-drop-resistant polyurethane coating which has the advantages of high flame retardance, high refractive index and no melt drop.

The invention discloses a corrosion-resistant insulating aerial cable which sequentially comprises a conductor layer, an insulating layer, a shielding layer, a corrosion-resistant layer and an outer sheath from inside to outside. The conductor layer is an aluminum alloy stranded wire of which the surface is coated with an anti-oxidation coating; the insulating layer is made of crosslinked polyethylene doped with 3-5% of nano silicon dioxide; the corrosion-resistant layer is a fluoroplastic or polyurethane coating; and the outer sheath is polyvinyl chloride added with an antioxidant and an ultraviolet light absorber. The fluoroplastic coating is formed through electrostatic spraying, and the surface of the copper wire shielding layer is subjected to phosphating pretreatment; the doped nano material enhances the mechanical strength and ultraviolet resistance of the insulating layer; the spiral groove design accelerates drainage and reduces accumulated water corrosion.

The present invention relates to the technical field of polyurethane material production, and discloses a polyurethane micro-foam material and a preparation method thereof, comprising a substrate layer, a polyurethane micro-foam layer, and a PU layer, wherein the substrate layer and the polyurethane micro-foam layer are bonded and connected by a polyurethane adhesive, and the PU layer is composed of a uniformly mixed polyurethane coating and coated on the polyurethane micro-foam layer. The polyurethane micro-foam material and the preparation method thereof, through the polyurethane micro-foam layer, a novel polyurethane micro-foam layer structure is designed, and a polyurethane micro-foam material is prepared, and the composite material not only inherits the characteristics of polyurethane shoe upper film with diverse textures, diverse colors, and easy processing, but also has the advantages of light weight, moisture permeability and breathability, folding resistance, waterproof, UV resistance, wear resistance, low temperature resistance, high temperature resistance, dirt resistance, soft and comfortable feel, etc., and is convenient to process through a dry coating-lamination process, simple to operate, and can be mass-produced.

The invention relates to the field of school uniform fabric production, in particular to a preparation method of an environment-friendly quick-drying school uniform fabric, which comprises the following preparation steps: S1: material selection, S2: fiber functionalization treatment, S21: plasma surface modification, S22: enzymatic polishing, S3: blended yarn preparation and fabric weaving, S4: fabric dyeing, S5: multifunctional composite finishing, S51: spraying of a waterborne polyurethane coating, S52: ozone washing water softening, s6, carrying out post-treatment; the regenerated polyester, the organic cotton and other raw materials are adopted, the regenerated polyester is made of recycled PET plastic bottles and is environmentally friendly and economical, polar groups on the surface of the regenerated polyester are activated through plasma surface modification, the hygroscopicity is greatly improved, the quick-drying performance is enhanced, and by means of a unique double-layer honeycomb mesh structure and a double-strand yarn optimization treatment mode, the moisture absorption performance is greatly improved. A multidirectional moisture guiding channel is formed, and the moisture evaporation rate is increased, so that the prepared school uniform fabric is environment-friendly, durable and comfortable while maintaining high-breathability and quick-drying performance.

The invention relates to the technical field of floor manufacturing, and discloses a wear-resistant ground heating floor and a preparation method thereof. According to the wear-resistant floor heating floor, the rock wood plate serves as the base material layer, the surface of the rock wood plate is coated with the polyurethane coating to serve as the wear-resistant layer, and due to coating of the polyurethane coating, the wear resistance of the floor is improved, and the heat resistance, flame retardance and water resistance of a base body are improved; wherein a coating formed by the polyurethane coating has certain excellent wear resistance, the wear resistance of the coating is further improved by introducing the reinforcing filler, and the heat resistance and flame retardance of the coating are further improved by introducing a heat-resistant group and a phosphate structure into the coating; in addition, the introduction of hydroxyl silicone oil also improves the hydrophobicity of the matrix, so that the water resistance of the coating is improved.

The invention discloses an antifouling waterborne polyurethane coating for ships, and relates to the technical field of waterborne polyurethane coatings, and the antifouling waterborne polyurethane coating is prepared from the following raw materials in parts by weight: 5 to 8 parts of polytetrahydrofuran, 3 to 5 parts of diphenylmethane diisocyanate, 4 to 5.2 parts of chain extender and 0.45 to 0.7 part of functional filler. According to the antifouling waterborne polyurethane coating for the ship, the chain extender I tends to be distributed on a coating-water interface through the hydrophilicity of triethanolamine in the chain extender I, meanwhile, boric acid groups are preferentially in contact with seawater and are distributed on the surface layer of a coating, the water solubility is high, boric acid ions are rapidly released at the initial stage, and the antifouling waterborne polyurethane coating is good in antifouling property. The initial adhesion of marine microorganisms is inhibited through ion repulsion; an MDI fragment in the chain extender II provides an extra-NCO reaction site, and chemical crosslinking is generated between the MDI fragment and a network formed by the chain extender I, so that the overall crosslinking density is improved, and the toughness and weather resistance of a coating film are improved.

The invention discloses an anti-fouling etching AG glass coating material and a preparation method thereof, and relates to the technical field of anti-fouling coating materials. A coating material of the anti-fouling and anti-etching AG glass consists of composite modified silicon dioxide sol and a high-performance polyurethane coating raw material, the composite modified silicon dioxide sol is prepared from graphene oxide modified particles, dispersed silicon dioxide sol and a low-surface-energy solution, graphene oxide modified particles and a low-surface-energy solution are used for synergistically modifying dispersive silicon dioxide sol to obtain composite modified silicon dioxide sol, then under the action of a high-performance polyurethane coating raw material, the wear resistance and the hydrophobic antifouling property of the coating material are further enhanced, and meanwhile, the coating material also has good light transmittance and is suitable for being used in the field of coating materials. And the excellent treatment effect on AG glass spraying is achieved.

The invention discloses a preparation method of an ethyl cellulose and isocyanate cross-linked coated urea slow-release fertilizer, and relates to a preparation method of a urea slow-release fertilizer. The invention aims to solve the problems that the existing nitrogen fertilizer is low in utilization rate and easy to absorb moisture and cake, a polyurethane coating material is non-degradable, and pure ethyl cellulose is insufficient in mechanical strength and limited in water resistance and is not beneficial to being used as a coating matrix of the fertilizer. The method comprises the following steps: 1, preparing an ethyl cellulose cross-linked isocyanate enveloping solution; and 2, preparing the ethyl cellulose and isocyanate cross-linked coated urea slow-release fertilizer. According to the preparation method, etherified derivative ethyl cellulose of cellulose is taken as a raw material, and the defects that a pure ethyl cellulose membrane is insufficient in mechanical strength, limited in water resistance and low in nutrient separation control precision are overcome by utilizing isocyanate crosslinking modification. The prepared slow-release fertilizer has the advantages of being simple in process, low in cost, environmentally friendly, degradable in matrix, capable of effectively preventing urea from absorbing moisture and caking and the like, and is suitable for large-scale preparation and used in agricultural production.

The invention discloses an antifouling and self-repairing non-isocyanate polyurethane coating and a preparation method thereof, the preparation method comprises the following steps: preparation of polycyclic carbonate resin: adding anhydride and polyol into an organic solvent, uniformly mixing, reacting at 100-150 DEG C for 3-5 hours until the acid value is constant, and cooling to room temperature; adding glycerol carbonate, refluxing with xylene, reacting at 180-210 DEG C until the acid value is lower than 3.0 mgKOH / g, cooling to room temperature, washing with water for 2-3 times, and removing the solvent to obtain polycyclic carbonate resin; and preparation of the polyamine curing agent: mixing polyamine, amino-terminated polydimethylsiloxane and an amine compound containing disulfide bonds, and uniformly stirring to obtain the polyamine curing agent. The preparation method disclosed by the invention has the advantages of simple synthesis and low cost, and meanwhile, the prepared non-isocyanate polyurethane coating has good self-repairing property, pollution resistance and corrosion resistance.

The invention relates to the technical field of polyurethane coatings, and discloses a preparation method of an antibacterial wear-resistant waterborne polyurethane coating, which comprises the following steps: taking concentrated hydrochloric acid, p-phenylenediamine, sodium nitrite, paraformaldehyde, amino-modified nano silicon dioxide and hexamethylene diisocyanate as raw materials; the preparation method comprises the following steps: taking 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide as a raw material, carrying out diazotization coupling reaction, substitution reaction, Mannich reaction and addition reaction to prepare modified polyisocyanate, then taking 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and ((2-aminoethyl) azadiyl) dimethanol as raw materials, carrying out substitution reaction to prepare DOPO-based dihydric alcohol, and carrying out reaction to prepare the DOPO-based dihydric alcohol. Finally, the modified polyisocyanate, DOPO-based dihydric alcohol and polyethylene glycol 400 are used as raw materials, an antibacterial wear-resistant polyurethane emulsion is prepared through a prepolymerization reaction and a chain extension reaction, and the prepared polyurethane coating has good antibacterial, anti-ultraviolet, flame-retardant and wear-resistant properties.

The invention discloses a bionic anti-drag protective film based on a surface micro-nano structure and a preparation method of the bionic anti-drag protective film, and relates to the technical field of anti-drag film preparation. According to the preparation method, the high-strength nitrogen-containing thermoplastic polyurethane film layer with the flame retardant property is prepared, one layer is coated with the hyperbranched polyurethane coating, the drag reduction functional layer with the microstructure is formed through embossing and photo-thermal dual curing, and the hyperbranched polyurethane coating can form a high-density cross-linked network during curing, so that the drag reduction performance is improved; according to the present invention, the hyperbranched polyurethane coating material has characteristics of good mechanical property and good weatherability, the hyperbranched structure can assist in dispersion of shrinkage stress and maintenance of coating surface flatness during heating, and the hyperbranched polyurethane coating material further contains nitrogen rings so as to provide the coating material with certain fire resistance.

The invention relates to a preparation method of a graphene type flame-retardant, light-resistant and wear-resistant waterborne polyurethane coating, which comprises the following steps: adding polyol and isocyanate into a flask, dropwise adding dibutyltin dilaurate, and reacting for 1-2 hours; adding polyethylene glycol into the prepolymer, and reacting for 1-2 hours to obtain the prepolymer; then adding 1, 4-butanediol BDO and a disulfide compound, carrying out a reaction at 70-80 DEG C for 1-2 h, then adding methoxypolyethylene glycol (MPEG) into the prepolymer, and carrying out a reaction at 70 DEG C for 1-2 h; then adding an ultraviolet absorbent, a coumarin derivative, hydroxypropyl propargyl ether and a nitrogen-phosphorus-silicon flame retardant, and carrying out a reaction at 70-80 DEG C for 1-1.5 h; adding ethylene diamine, carrying out secondary chain extension, carrying out stirring reaction at 60-70 DEG C for 0.5-1 hour, adding water, keeping the stirring speed at 2000 r / min, and carrying out reaction for 0.5-1 hour; the graphene type flame-retardant, light-resistant and wear-resistant waterborne polyurethane coating is obtained; the obtained polyurethane has the advantages of favorable flame retardancy, favorable light resistance and favorable wear resistance.

The invention belongs to the technical field of heat insulation materials, and discloses a heat reflective heat insulation coating and a preparation method thereof, including 100 parts by weight of waterborne polyurethane, 15-40 parts by weight of titanium dioxide loaded cellulose aerogel, 0.3-0.8 parts by weight of defoamer, 0.3-0.6 parts by weight of leveling agent, and 10-25 parts by weight of ammonium polyphosphate; nano titanium dioxide is uniformly dispersed in a cellulose aerogel matrix and a polyurethane coating, suppressing the agglomeration of nano titanium dioxide, reducing the particle size of nano titanium dioxide, making the particle size distribution of nano titanium dioxide meet the requirements of reflecting sunlight, improving the thermal reflectivity and heat reflective performance of the coating, and having better heat reflective heat insulation effect. Cellulose aerogel contains a large amount of triazine nitrogen-rich functional groups, forms an expansion flame retardant system with a cellulose aerogel matrix and ammonium polyphosphate, and improves the flame retardant performance of the coating.

The invention discloses resin composite liquid with dual self-repairing and high ethanol solvent wiping resistance as well as a preparation method and application of the resin composite liquid, and belongs to the technical field of polyurethane emulsion coatings. Aiming at the problems that an existing waterborne polyurethane coating is poor in ethanol resistance due to residual carboxyl / hydroxyl of a hydrophilic chain extender and the self-repairing efficiency of a single dynamic bond is low, a metal ion buffer solution is added into a hydroxyl-terminated polyurethane emulsion to coordinate with the carboxyl of the hydrophilic chain extender, so that a hydrophilic group is closed, and the crosslinking density is increased; meanwhile, a boric acid compound is introduced to form dynamic boric acid ester bonds with residual hydroxyl groups of the system, and hydrophilic groups in the system are consumed while a dual self-repairing network is constructed. The coating prepared by the invention has good self-repairing and ethanol wiping resistance.