1095 results about "Extender" patented technology

The invention relates to a self-repairing high-mechanical-property film and a preparation method and application thereof, and the preparation method comprises the following steps: adding ureido pyrimidone and a chain extender into a solvent to obtain a mixed solution, adding the mixed solution into a polyurethane prepolymer, reacting, and drying to obtain the self-repairing high-mechanical-property film. UPy containing hydrogen bonds is introduced into the polymer to prepare the self-repairing high-mechanical-property film, and the hydrogen bond density can be adjusted by adjusting the UPy content of ureido pyrimidone, so that the composite material has excellent self-healing property; and density hydrogen bonds are introduced to construct a physical cross-linked network, so that the mechanical properties of the composite material can be remarkably improved.

The invention discloses a halogen-free flame-retardant TPU (thermoplastic polyurethane) material suitable for a charging pile cable and a preparation method of the halogen-free flame-retardant TPU material, belongs to the technical field of TPU material processing, and aims to solve the technical problem that the flame retardance and wear resistance of a TPU material for a cable in the prior art need to be further improved. The material comprises the following raw material components in parts by weight: 80-100 parts of a cross-linked thermoplastic elastomer, 10-20 parts of a modified filler, 10-20 parts of a flame-retardant chain extender, 3-5 parts of a stabilizer, 3-5 parts of an antioxidant, 3-5 parts of an ultraviolet light absorber and 3-5 parts of a lubricant, after the modified thermoplastic elastomer is prepared, the modified thermoplastic elastomer is activated and cross-linked with the flame-retardant cross-linking agent, a silane structure is introduced into the structure, the flame-retardant cross-linking agent and the modified filler enhance the flame-retardant capability of the material through a synergistic effect, and meanwhile, the compatibility of the material and an inorganic material is enhanced by hybridizing a polyurethane chain segment; the wear resistance, flame retardance and other properties of the material are improved.

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 an INS film with excellent comprehensive performance, which comprises a surface protection layer, an upper base material layer, a printing ink layer, a bonding glue layer and a lower base material layer which are sequentially superposed from top to bottom, the surface protection layer is prepared from the following raw materials in parts by weight: 75-135 parts of polyester polyol resin, 30-60 parts of hydroxy acrylic resin, 2-25 parts of an isocyanate curing agent, 2-17 parts of a closed curing agent, 2-25 parts of a chain extender, 0.5-8 parts of a catalyst, 0.5-2 parts of an antioxidant and 0.5-3 parts of an ultraviolet light absorber. According to the surface protection layer of the INS film, the high-temperature condition of a high-temperature plastic uptake procedure of the INS film in preparation of INS parts is well utilized, so that the closed curing agent is effectively excited to perform secondary cross-linking curing reaction. The INS film is good in surface chemical reagent resistance, has the characteristics of high heat stretch rate, high hardness and scratch resistance, has excellent ultraviolet irradiation yellowing resistance, and is particularly suitable for the field of in-mold decoration.

The invention discloses a high-barrier degradable composite film and a preparation method thereof, and belongs to the field of film manufacturing. 15 to 30 parts of PBAT; 15 to 30 parts of PPC; 1 to 10 parts of montmorillonite; 0.2 to 1 part of an epoxy chain extender; 0.2 to 0.5 part of an aliphatic alcohol chain extender; and 1.5-15 parts of a low molecular weight aliphatic polyamide substance. According to the invention, biodegradable materials PLA, PBAT and PPC with excellent performance are selected as base materials, and a certain amount of auxiliary agents are added to modify and prepare the high-barrier degradable composite film. The prepared composite film has the advantages of high strength, high toughness, high barrier property, low cost, high biodegradability and the like. Besides the field of mulching films, the film can also be widely applied to high-end packaging fields with high barrier property requirements, such as packaging of high-tech fine instruments, food and medicine industries and the like, and the preparation method is simple, economical and environment-friendly.

The invention discloses a waterborne acrylic acid-polyurethane composite emulsion, a waterborne acrylic acid-polyurethane composite paint, and a preparation method and application of the waterborne acrylic acid-polyurethane composite emulsion. According to the preparation method of the water-based acrylic acid-polyurethane composite emulsion, a core-shell structure polyacrylic acid-polyurethane emulsion is synthesized in situ by utilizing a core-layer monomer pre-emulsion and a shell-layer monomer pre-emulsion through a semi-continuous seed emulsion polymerization method. The shell layer of the core-shell structure has hydrophilic functional groups including carboxyl, sulfo group and hydroxyl, so that the emulsion has a self-thickening effect, and rheological properties and good constructability required by the coating can be provided. A nonionic hydrophilic group composite sodium sulfonate type post chain extender is selected as waterborne polyurethane, the emulsifying capacity is high, the emulsion stability is good, strong-acid monomers such as acrylic acid and methacrylic acid can be selected, high-thixotropy resin can be obtained through adjustment, meanwhile, the PA content can be effectively increased, the water resistance and weather resistance of a paint film can be improved, and the water resistance and weather resistance of the paint film can be improved. Therefore, the requirements of the automobile paint on moisture resistance, especially high-pressure flushing resistance, are met.

The invention relates to a preparation method of a polyurethane-based flexible phase-change material and a battery heat management device. Polyethylene glycol is used as a phase-change material, and adipic dihydrazide (ADH) and 4, 4 '-diphenyltetracarboxylic dianhydride (ADH) are integrated at a condensation end of a heat pipe; at least one of 4, 4 '-diaminobenzanilide (DABA) is used as a cross-linking agent, and at least one of HMDI or IPDI is used as a chain extender to prepare the polyurethane-based flexible phase change material with enthalpy value, flexible rigidity and appropriate phase change temperature. The material not only has excellent mechanical strength and thermal stability, but also has healing property, recoverability and shape memory function. The polyurethane-based flexible phase change material serves as an energy storage film and forms a sealing structure with the condensation end through mechanical pressing. When the temperature rises, the energy storage film B1 absorbs heat and expands, the contact area with the outside is increased, the heat dissipation power is improved, and the heat dissipation efficiency and the heat load management capacity are remarkably improved by maximizing the heat transfer area and utilizing the high latent heat characteristic.

The invention relates to the technical field of water-based ink, in particular to bio-based polyurethane water-based ink and a preparation process thereof. The preparation method specifically comprises the following steps: S1, adopting ring-opening epoxidized soybean oil and modified epoxidized soybean oil as chain extenders, and carrying out chain extension reaction on the chain extenders and a polyurethane prepolymer to prepare waterborne polyurethane; s2, performing viscosity reduction treatment on starch, then grafting with 3-amino-5 carboxyl-N-methyl benzamide, and finally mixing with ring-opening epoxidized soybean oil for modification to prepare modified starch; s3, mixing the waterborne polyurethane, the modified starch, the waterborne pigment, the thickening agent, the flatting agent, the defoaming agent and the deionized water according to the proportion, emulsifying and defoaming to obtain the bio-based polyurethane waterborne ink. The bio-based polyurethane water-based ink has excellent thermal stability, adhesive capacity and printing quality, is green and environment-friendly, and shows remarkable practicability.

The invention relates to the technical field of films, in particular to a flexible film special for a handwriting board and a preparation method of the flexible film. The flexible film is obtained by coating a release film with coating slurry and carrying out thermocuring, wherein the coating slurry contains modified polyurethane, a flatting agent, a defoaming agent and ethyl acetate. According to the modified polyurethane, polycarbonate diol, isophorone diisocyanate and other raw materials are subjected to a reaction, and a nano particle chain extender containing disulfide bonds is added. The nano particle chain extender containing disulfide bonds is prepared by modifying nano silicon dioxide and grafting cystamine dihydrochloride and diamino polyethylene glycol. Through nanoparticle surface modification and dynamic disulfide bond network construction, molecular-level coupling of a rigid reinforced phase and a flexible substrate, inhibition of nanoparticle aggregation and balance of strength and toughness are realized, the dynamic disulfide bond network can self-repair microcracks, and a high-quality special flexible film solution is provided for a high-performance handwriting board.

The invention discloses a preparation method of a flame-retardant, light-emitting and recoverable transparent polyurethane material, which comprises the following steps: reacting triethanolamine with diphenylphosphonyl chloride to obtain a light-emitting flame retardant, and polymerizing the light-emitting flame retardant with polyether polyol, isocyanate and a chain extender to obtain the flame-retardant, light-emitting and recoverable transparent polyurethane material, the preparation method is simple, the process is easy to control, the prepared transparent polyurethane material can keep high tensile strength, the limit oxygen index can reach 30.3, the UL-94 grade reaches the V-0 grade, and the flame retardant effect is good; in addition, due to high transparency and fluorescence, the compound can be used as a light conversion film to be applied to a flexible solar cell, so that the photoelectric conversion efficiency of the flexible solar cell is improved.

The invention discloses bio-based polyurethane as well as a preparation method and application thereof, and belongs to the technical field of polyurethane. The bio-based polyurethane is prepared from bio-based silicon-based polyester polyol, diisocyanate and a bio-based chain extender, wherein the molar ratio of the bio-based silicon-based polyester polyol to the diisocyanate to the bio-based chain extender is 1.0: (3.0-5.0): (2.0-4.0); wherein the bio-based silicon-based polyester polyol is prepared by taking bio-based dibasic acid and single-ended dihydroxy siloxane as raw materials, and carrying out esterification reaction on the bio-based dibasic acid and the single-ended dihydroxy siloxane. In the bio-based polyurethane, siloxane antifouling groups are suspended on side chains of polyurethane macromolecules, so that the bio-based polyurethane is endowed with excellent antifouling and hydrophobic properties; the mechanical property of polyurethane is good, the compatibility of siloxane and polyurethane is improved, and the polyurethane slurry has good pigment dispersion stability. In general, the comprehensive performance of the bio-based polyurethane is excellent, and the bio-based polyurethane has important economic and application significance for obtaining high-quality polyurethane products.

The invention provides an antifouling self-cleaning fluorocarbon finish paint as well as a preparation method and application thereof, and particularly relates to the technical field of special coatings. The antifouling self-cleaning fluorocarbon finish paint is composed of a component A and a component B in a ratio of (80-87): 16, the component A is prepared from the following components in parts by weight: 560 to 580 parts of fluorocarbon resin, 30 to 35 parts of a first solvent, 20 to 40 parts of a second solvent, 180 to 220 parts of titanium dioxide, 90 to 110 parts of filler, 11 to 20 parts of a light stabilizer, 3 to 5 parts of a thickening agent and 13 to 28 parts of an auxiliary agent; the component B comprises the following components in parts by weight: 20-22 parts of fluorocarbon resin, 4-5 parts of a chain extender, 15-20 parts of a diamine curing agent, 15-20 parts of a polyamine curing agent and 25-35 parts of a second solvent. According to the finishing paint, on the basis of enhancing the self-cleaning capability, the weather resistance of a coating is improved, and the aging and damage of the coating are delayed, so that the service life of the coating is prolonged.

The invention provides a preparation method of a photoresponse thin film material, the photoresponse thin film material and an ultraviolet light monitoring device and system.The method comprises the steps that 4, 4 '-dihydroxy hexyloxy azobenzene is added into a polymer formed by polymerizing a dihydroxy oligomer and a diisocyanate-based monomer, polyurethane containing azobenzene groups is obtained, and the polyurethane containing the azobenzene groups is added into the polymer to obtain the photoresponse thin film material. The preparation method comprises the following steps: dissolving polyurethane and a piezoelectric polymer in a high-boiling-point solvent to obtain an electrospinning solution, and carrying out electrostatic spinning by adopting the electrospinning solution to obtain the photoresponse film material. According to the invention, 4, 4 '-dihydroxy hexyloxy azobenzene containing six-carbon spacer is used as a chain extender and is added into a polymer of a dihydroxy oligomer and a diisocyanate-based monomer to obtain azobenzene group-containing ultraviolet light response polyurethane, and then the polyurethane and a piezoelectric polymer are combined, so that the ultraviolet light response performance of the piezoelectric polymer is improved. The photoresponse thin film material with better flexibility, better mechanical property and good ultraviolet response is prepared, the preparation process of the photoresponse thin film material is simple, and the preparation cost is low.

The invention relates to a thermal interface composite material with heat transfer performance and heating rheological property and a preparation method thereof, the preparation method comprises the following steps: adding ureido pyrimidone and a chain extender into a solvent to obtain a mixed solution, adding the mixed solution into a polyurethane prepolymer for reaction to obtain the polyurethane prepolymer containing ureido pyrimidone; adding hydroxylated boron nitride nanosheets into the polyurethane prepolymer containing the ureido pyrimidone, stirring, and drying, so as to obtain the thermal interface composite material. The preparation method comprises the following steps: introducing hydrogen bond-containing ureido pyrimidone UPy into polyurethane, constructing density hydrogen bonds among polymer chains, enabling a polyurethane prepolymer PUUPy to have a certain rheological property, introducing hydroxylated boron nitride nanosheets in a non-covalent manner, constructing a heat conduction path in the polymer while not influencing the rheological property of the material, and improving the heat conduction performance of the material. The composite material is endowed with heat-conducting property, and the prepared composite material has efficient heat transfer property and heating rheological property.

The invention belongs to the technical field of polyurethane waterproof coatings, and particularly relates to a single-component fluorine-free high-hydrophobicity polyurethane waterproof coating and a preparation method thereof, and the single-component fluorine-free high-hydrophobicity polyurethane waterproof coating comprises the following raw materials by weight: 60-80 parts of composite polyether polyol; 20 to 40 parts of silane modified polyether polyol; 11 to 17 parts of diisocyanate; 2-5 parts of a chain extender; 50 to 70 parts of a plasticizer; 50 to 70 parts of filler; 0.15 to 0.2 part of a catalyst; and 3-5 parts of an auxiliary agent. A polyoxypentene ether chain segment, a castor oil-based structure and a silane group are introduced into the molecular structure of the waterproof coating through chemical modification, the intrinsic hydrophobic and mechanical properties of the material are improved, the migration defect caused by addition of a hydrophobic agent and silicone oil in a traditional preparation method is overcome, and the invention further provides a preparation method of the waterproof coating.

The invention belongs to the technical field of polymer materials, and provides a waterborne polyurethane dispersoid as well as a preparation method and application thereof, the waterborne polyurethane dispersoid is prepared from the following raw materials: polyisocyanate, polybutadiene polyol, a hydrophilic chain extender, an optional micromolecule chain extender and a neutralizer; polybutadiene polyol with a specific structure and molecular weight is adopted as a soft segment, and through component design and mutual compounding, the waterborne polyurethane dispersion has lower polarity and surface energy, has good adaptability with a low-surface-energy substance / low-surface-energy filler, can form excellent dispersion and coating effects on the low-surface-energy substance, and can be used for preparing the waterborne polyurethane dispersion. The slurry performance is improved; meanwhile, the waterborne polyurethane dispersion has excellent solvent resistance, low temperature resistance, hydrolysis resistance and mechanical properties, and has wide application prospects in the fields of battery slurry dispersants, photovoltaic backboard adhesives, conformal coating and the like.

The invention discloses an integrated gradient polyurethane foam material and a preparation method thereof, and belongs to the technical field of foam materials. The preparation method comprises the following steps: uniformly mixing polyether polyol, a foaming agent, a chain extender, a cross-linking agent, a foam stabilizer and a catalyst to obtain a prefabricated material; uniformly mixing the prefabricated material with isocyanate to obtain a foaming material; the foaming material is poured into the mold, the surface in the lifting direction of the foaming material serves as an acting surface, and a load effect is applied; after a load effect is applied, free foaming is carried out; after foaming is finished, the foam sample is taken out and cured, and the integrated gradient polyurethane foam is obtained. The technical method adopted by the invention is simple and easy to reproduce, and the purposes of reducing energy consumption, reducing cost or improving efficiency and the like can be achieved. The gradient foam material prepared by the preparation method disclosed by the invention realizes continuous transition between density and cell size, avoids internal damage caused by interface problems, and has the characteristics of light weight, high strength, compression resistance, energy absorption and shock absorption.

The invention belongs to the technical field of polyurethane elastomers, and particularly relates to a hollow glass bead / TPU composite material for an air bag of a life jacket and a preparation method of the hollow glass bead / TPU composite material. The polyurethane resin is prepared from the following raw materials in percentage by mass: 48%-61% of polyether glycol, 28%-33% of diisocyanate, 5%-9% of a mixed chain extender, 0.2%-0.4% of a hydrolysis-resistant agent, 0.3%-0.5% of an antioxidant, 0.2%-0.4% of a catalyst and 5%-9% of modified hollow glass beads. The TPU material is firm, durable and not prone to damage, the buoyancy of the TPU material is improved through the modified hollow glass beads, and meanwhile the binding force of the hollow glass beads and TPU is increased. The invention also provides a preparation method thereof.

The invention belongs to the technical field of polyurethane elastomers, and discloses a high-strength room-temperature self-repairing lignin / polyurethane composite elastomer as well as a preparation method and application thereof. The preparation method comprises the following steps: firstly, gradually polymerizing long-chain dihydric alcohol, irregular isocyanate, a hydrazide chain extender and a dioxime chain extender to obtain a polyurethane matrix with multiple dynamic bonds, and then introducing high-rigidity lignin and metal ions to prepare the lignin-reinforced polyurethane composite elastomer. The lignin / polyurethane composite elastomer prepared by the invention has the characteristics of good compatibility, high strength, room-temperature self-repairing and repeatable hot working, and overcomes the problems that a common lignin-based polyurethane elastomer is poor in compatibility, and the high strength and low-temperature self-repairing cannot be realized at the same time.

The invention provides a full-biodegradable film and a preparation method thereof. The film comprises the following raw materials: PLA, PBAT, calcium carbonate, an epoxy chain extender and zinc stearate. The preparation method of the film comprises the following steps: (1) modifying calcium carbonate with zinc stearate to obtain active calcium carbonate; (2) mixing activated calcium carbonate and PBAT, melting and granulating to obtain a one-step modified material; (3) carrying out melt blending on an epoxy chain extender and PLA to obtain a second-step modified material; (4) carrying out melt blending on the first-step modified material and the second-step modified material to obtain a PLA / PBAT / calcium carbonate composite material; and (5) adopting the PLA / PBAT / calcium carbonate composite material, and continuously blowing the PLA / PBAT / calcium carbonate composite material into a film through a single-screw extruder to obtain the full-biodegradable film. The thin film meets the use requirements of GB / T38082-2019, GB / T21661-2020 and GBT 35795-2017, and the production cost is low.

The invention provides a solvent-free two-component polyurethane structural adhesive. The solvent-free two-component polyurethane structural adhesive is prepared by mixing a component A and a component B according to a volume ratio of 1: 1, the component A is prepared from the following components in parts by weight: 10 to 20 parts of high molecular weight and high functionality polyether polyol, 10 to 20 parts of low molecular weight and high functionality polyether polyol, 10 to 20 parts of random block copolymer of polycarbonate and polyether, 1 to 10 parts of chain extender, 20 to 50 parts of filler, 0.5 to 10 parts of water removal agent, 0.5 to 10 parts of thixotropic agent, 0.01 to 3 parts of pigment and 0.001 to 3 parts of catalyst; the component B is prepared from the following components in parts by weight: 20 to 50 parts of an isocyanate-terminated polyurethane prepolymer, 0 to 20 parts of isocyanate, 30 to 60 parts of filler, 0.1 to 10 parts of a water removal agent, 0.5 to 10 parts of a thixotropic agent and 0.01 to 5 parts of a silane coupling agent. The solvent-free bi-component polyurethane structural adhesive provided by the invention does not contain a solvent, is safe and environment-friendly, and is harmless to human health; the adhesive has good adhesion to different types of base materials, and is aging-resistant.

The invention discloses a super-hydrophobic self-repairing polyurethane film for photovoltaics and a preparation method of the super-hydrophobic self-repairing polyurethane film. The super-hydrophobic self-repairing polyurethane film is prepared from the following components in parts by weight: polyether polyol, isocyanate, a catalyst, a solvent, a self-repairing auxiliary agent, a chain extender and super-hydrophobic nanoparticles, the super-hydrophobic nano particles are fluorine-silicon polymer nano particles which are modified hydrophobic nano particles obtained by hydrolyzing two or more organic silicon and then introducing a C-F bond through copolycondensation to realize fluorination modification; the service life of the composite material is prolonged, the durability of the composite material is improved, and the material can be self-healed after being damaged by the outside; on the basis of self-repairing, hydrophobic nanoparticles are added to realize a super-hydrophobic surface; the transparent polyurethane film material for the photovoltaic power generation panel can be adhered through electrostatic adsorption or other adhesives, so that the film material is loaded on the photovoltaic panel, the photovoltaic panel is protected, and the photovoltaic panel is prevented from being damaged due to external environment pollution.

The invention discloses a low-staining low-viscosity waterborne polyurethane macromolecular coloring agent and a preparation method of the low-staining low-viscosity waterborne polyurethane macromolecular coloring agent. Comprising the following components in parts by weight: 15 to 30 parts of aliphatic diisocyanate, 15 to 30 parts of micromolecular dye, 10 to 30 parts of polypropylene glycol and / or dihydroxy silicone oil, 25 to 50 parts of polyethylene glycol, 1 to 3 parts of micromolecular dihydroxy compound chain extender, 0.05 to 0.3 part of catalyst, 90 to 140 parts of acetone and 50 to 300 parts of water. By designing the hydrophilicity and proportion of the soft and hard segments of the polyurethane coloring agent, the waterborne polyurethane macromolecular coloring agent color paste which is low in staining, easy to clean, less than 1000mpas in product viscosity, more than 5% in color concentration and more than 5% in dye equivalent and good in compatibility is finally obtained, and the waterborne polyurethane macromolecular coloring agent color paste can meet the requirements of liquid product coloring agents such as clothing care and household cleaning agents. The cleaning agent can also be used for liquid cleaning agent products for body care and catering.

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.

The invention discloses a preparation method of a noise-reducing anti-corrosion multifunctional coating, which comprises the following steps: mixing a polydimethylsiloxane prepolymer with a curing agent, casting on a glass sheet, curing, demolding to obtain a film substrate, and carrying out laser perforation treatment on the film substrate to obtain a low-frequency noise-reducing film substrate; taking the low-frequency noise reduction film substrate as a directional receiving plane, and performing electrostatic spinning treatment to obtain the low-frequency noise reduction film; uniformly mixing aliphatic isocyanate, polyether polyol, a chain extender, a catalyst, a conductive filler, a heat-conducting filler, porous titanium dioxide, a defoaming agent, a dispersing agent and a latent curing agent, and treating to obtain an anti-corrosion damping coating; the surface of a target base body is sequentially coated with the anti-corrosion damping coating, the low-frequency noise reduction film and the anti-corrosion damping coating, and the noise reduction and anti-corrosion multifunctional coating is obtained; the problems that in the prior art, due to separation of low-frequency noise reduction and anti-corrosion functions, construction is complex, cost is high, the effect is limited, and signal transmission quality and equipment durability are difficult to consider at the same time are solved.

The invention discloses a corrosion-resistant cavitation-erosion-resistant self-repairing marine protective coating suitable for a high-temperature environment and a preparation method thereof, belongs to the technical field of marine protective coatings, and aims to further improve the comprehensive performance of existing self-repairing polyurethane. FA-FGE diol is used as a chain extender, and on the basis of a DA bond, the corrosion-resistant cavitation-erosion-resistant self-repairing marine protective coating suitable for the high-temperature environment and the preparation method of the corrosion-resistant cavitation-erosion-resistant self-repairing marine protective coating are prepared. A hydrogen bond is used as a supplement to adjust the content of a chain extender according to different molar ratios, and is introduced into a PU system to obtain self-repairing performance. The dopamine is used for performing surface modification on the carbon nano tube, so that the binding property and the dispersity of the dopamine modified carbon nano tube and a polyurethane interface are improved, and the overall protection performance of the material is improved. Tests show that the material toughness of the coating can reach 356 MJ / m < 3 >, and the tensile strength can reach 72 MPa. Compared with previous reports, the corrosion resistance and cavitation erosion resistance are remarkably improved, the self-healing rate under infrared light for 90 s is 93%, and the self-healing rate after repeating for 3 times is 81%.

The invention discloses a wiredrawing aluminum laminated film and a preparation method thereof, and belongs to the field of films. The wiredrawing aluminized film comprises a wiredrawing base material, a polyurethane coating and an aluminized layer which are arranged in sequence, the polyurethane coating is formed by curing a polyurethane coating, the polyurethane coating is subjected to plasma surface treatment, and the polyurethane coating comprises a waterborne polyurethane dispersion liquid, a diluent and water which are compounded according to the weight ratio of 1: (0.5-1): (0.5-1); the waterborne polyurethane dispersion liquid is prepared from the following raw materials in parts by weight: 2-8 parts of double-end hydroxypropyl polysiloxane; 15 to 20 parts of polyether polyol; 15 to 20 parts of diisocyanate; 3-6 parts of a chain extender; 5-9 parts of a hydroxyl acrylate monomer; 2-5 parts of an acrylate monomer; 1 to 3 parts of single-ended vinyl polysiloxane; and 80-90 parts of water. The method has the advantages that the adhesive force of the aluminum layer is improved, and the durability of the wiredrawing aluminum laminated film is improved.

The invention provides a polyurethane composite material and application thereof, and relates to the technical field of polyurethane materials. The polyurethane composite material consists of a component A and a component B, the component A comprises the following raw material components in parts by weight: 100 parts of polymer dihydric alcohol, 1-8 parts of a chain extender, 1-3 parts of a catalyst, 0-5 parts of a cross-linking agent, 0.1-2 parts of a carbon-based material, 1-10 parts of an anthraquinone compound and 0.5-2 parts of water; and the component B is an isocyanate curing agent and comprises a prepolymer with a plurality of ester bonds and urea bonds. The polyurethane composite material disclosed by the invention has relatively high mechanical strength, wear resistance and the like, and is suitable for treating nitrogen-containing sewage.

The invention relates to the technical field of polyurethane materials, in particular to a polyacrylate modified polyurethane emulsion, a self-repairing polyurethane coating, a preparation method and application. The preparation method comprises the following steps: firstly, preparing an isocyanate-terminated prepolymer, then reacting the isocyanate-terminated prepolymer with a dihydroxy disulfide compound, introducing a disulfide bond into a polyurethane structure, and adding a diisocyanate tripolymer to continuously react to form a polyurethane prepolymer with a network structure; the preparation method comprises the following steps: firstly, preparing a polyurethane prepolymer emulsion, then adding an acrylate emulsion into the polyurethane prepolymer emulsion to pre-disperse acrylate molecules among a polyurethane network structure, then adding a chain extender to carry out chain extension on polyurethane, and then adding an auxiliary initiator to initiate acrylate polymerization so as to generate linear polyacrylate; the linear polyacrylate is interspersed in a cross-linked polyurethane network structure to form a polyacrylate modified polyurethane emulsion with a semi-interpenetrating network structure; and then light conversion particle polypyrrole is added, so that the self-repairing performance of the material is further improved.

The invention provides unsaturated waterborne polyurethane, a polyurethane composite material as well as a preparation method and application of the unsaturated waterborne polyurethane and the polyurethane composite material. According to the preparation method, isocyanate is introduced into a soft segment through a block process, an unsaturated chain extender is added, unsaturated double bonds are introduced, and waterborne polyurethane with excellent performance is prepared. Meanwhile, cellulose nanofibers are added into the unsaturated waterborne polyurethane, so that the interfacial compatibility and mechanical properties of the unsaturated waterborne polyurethane are improved. The unsaturated waterborne polyurethane provided by the invention has excellent film-forming property, stability and mechanical property.