483 results about "Dibutyl tin dilaurate" patented technology

The invention relates to a mildew-proof silicone sealant with high curing rate and high adhesive strength, and belongs to the technical field of adhesives. The anti-mildew coating is prepared from alpha, omega-dihydroxy polydimethylsiloxane, dimethyl silicone oil, fumed silica, phenoxy resin coated nano calcium carbonate, a modified hydroxypropyl-gamma-cyclodextrin loaded mildew preventive, dibutyltin dilaurate, methyltrimethoxysilane and a curing accelerator. According to the mildew-proof silicone sealant with the high curing rate and the high adhesive strength, the surface drying time is 9-13 minutes, the 24-hour curing depth is 6.3-7.2 mm, the adhesive strength is 3.0-3.6 MPa, the tensile strength is 5.8-6.4 MPa, the shear strength is 3.0-3.9 MPa, the elongation at break is 410-457%, and the mildew-proof grade is 0 grade in 30 days, 60 days, 180 days and 360 days.

The invention provides a wear-resistant, transparent, flexible and fluoride-free super-hydrophobic composite coating and a preparation method thereof. The preparation method comprises the following steps: mixing hydroxyl-terminated polydimethylsiloxane, gamma-aminopropyltriethoxysilane and dibutyltin dilaurate for reaction to obtain a modified precursor solution, adding swelled epoxy resin into the modified precursor solution, and heating for reaction to obtain siloxane modified epoxy resin; the preparation method comprises the following steps: dispersing nano silicon dioxide in an ethyl acetate solution to form a SiO2 suspension; and uniformly mixing the modified epoxy resin with a SiO2 suspension, adding polyether amine as a curing agent, stirring and mixing, and constructing the epoxy resin / hydroxyl-terminated polydimethylsiloxane / nano-silica super-hydrophobic coating on a substrate by adopting an air spraying mode. According to the preparation method disclosed by the invention, the super-hydrophobic coating with excellent transparency and flexibility and good adhesive force and wear resistance can be prepared, and the super-hydrophobic coating has a wide application prospect in the fields of wearable electronic equipment, photoelectric devices and the like.

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 invention relates to a preparation method of a hydrophobic and oleophobic PTFE membrane, and belongs to the technical field of PTFE membrane preparation. Aiming at the problems that an existing PTFE membrane is difficult to construct a micro-nano multi-stage coarse structure and has a synergistic effect with low chemical surface energy, the hydrophobic and oleophobic properties are insufficient and the structural stability is poor, the key points of the technical scheme provided by the invention are as follows: firstly, carrying out ethanol ultrasonic cleaning on a PTFE base membrane of 20-30 microns, and carrying out vacuum plasma treatment to form a nano coarse structure and oxygen-containing polar group active sites; then, under the protection of nitrogen, immersing into an ethanol solution containing perfluorodecyltriethoxysilane, dibutyltin dilaurate and nano cellulose whiskers, carrying out hot-pressing compounding with PET non-woven fabric, carrying out heat treatment, and finally, coating with a fluorine-containing polymer nano fiber layer through an electrostatic spinning process; the composite hydrophobic layer with the synergistic effect of a micro-nano multistage coarse structure and chemical low surface energy is formed, the water contact angle is larger than or equal to 155 degrees, and the oil contact angle is larger than or equal to 130 degrees. The PTFE film prepared by the preparation method can be used in the fields of waterproof breathable materials, self-cleaning surfaces, oil-resistant packaging and the like.

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 relates to the technical field of flame-retardant materials, and particularly discloses a graphene-modified flame-retardant polyurethane material and a preparation method thereof.The graphene-modified flame-retardant polyurethane material is prepared from, by weight, 60-70 parts of polyhydric alcohols, 30-40 parts of isophorone diisocyanate, 0.4-0.8 part of dibutyltin dilaurate, 3-6 parts of dimethylolpropionic acid, 15-20 parts of composite flame retardant, 2-4 parts of 1, 3-butanediol, 2-4 parts of 1, 3-butanediol, 2-4 parts of 1, 3-butanediol, 2-4 parts of 1, 3-butanediol, 2-4 parts of 1, 3-butanediol, 2 and 1 to 3 parts of 1, 4-butanediol and 1 to 3 parts of perfluorooctyltriethoxysilane. The preparation method comprises the following steps: 1) preparing castor oil-based polyester polyol through hydroxylation reaction and polycondensation; 2) taking graphene oxide as a core, grafting phosphorus and nitrogen flame-retardant groups and carrying out silane-titanate synergistic modification to prepare a composite flame retardant; 3, polyhydric alcohol and isocyanate are pre-polymerized, then the chain extender, the composite flame retardant and the auxiliaries are sequentially added, and curing molding.The material has low smoke and excellent flame retardance, mechanical property and hydrophobic stability through the synergistic effect of graphene and a phosphorus-nitrogen flame-retardant system, and is suitable for the field of flame-retardant high polymer materials for buildings, electronic packaging and the like.

The invention discloses a polyurethane cleaning-resistant antifouling coating based on an oxime-carbamate bond and a preparation method thereof, wherein the preparation method comprises the following steps: S1. After dehydrating the polyether diol, the polyether diol is mixed evenly with a diisocyanate, heated to 70-80°C, and a polymer A is obtained by reaction; S2. Polymer A, a solvent, a dioxime and a dibutyltin dilaurate catalyst are weighed, mixed evenly, and a polymer B is obtained by reaction; S3. Polymer B is coated on a substrate to form a sample, the prepared sample is placed at room temperature, and then the temperature is raised to 60°C for curing to obtain a coating. The antifouling coating of the present invention has good wear resistance, and the coating can undergo a hydrolysis reaction with seawater based on an oxime-carbamate bond, can meet the demand for the coating to be resistant to cleaning, and can solve the problem of marine organisms adhering to the surface of the hull to cause invasion of alien species.

The invention relates to the technical field of fabric waterproofing agents, in particular to a polyurethane modified organic silicon fluoride-free waterproofing agent and a preparation method thereof. The polyurethane modified organic silicon fluoride-free waterproof agent is prepared from the following raw materials in parts by mass: 5 to 15 parts of hexamethylene diisocyanate, 5 to 15 parts of butyl acrylate, 1 to 5 parts of methyl methacrylate, 40 to 60 parts of octamethylcyclotetrasiloxane, 10 to 30 parts of alpha, omega-dihydroxy polydimethylsiloxane and 5 to 10 parts of gamma-aminopropyl methyl diethoxy silane. The invention relates to a silane coupling agent, which is prepared from the following raw materials in parts by weight: 1 to 5 parts of glycidyl ether oxypropyl trimethoxy silane, 0.1 to 1 part of tetramethylammonium hydroxide, 0.1 to 1 part of triethylamine, 2 to 5 parts of tetraethoxysilane, 0.2 to 0.75 part of ammonia, 0.1 to 1 part of silane coupling agent KH-570, 0.01 to 0.1 part of dibutyltin dilaurate, 1 to 5 parts of epsilon-caprolactam, 1 to 2 parts of emulsifier and 0.1 to 1 part of initiator. The fabric treated by the method has good softness and excellent hydrophobic effect.

The invention relates to the technical field of adhesives, in particular to a bio-based polyurethane hot melt adhesive and a preparation process thereof. The bio-based polyurethane hot melt adhesive is prepared from the following raw materials in parts by weight: 30 to 40 parts of bio-based polyester glycol, 60 to 80 parts of bio-based polyether polyol, 25 to 35 parts of acrylic resin, 40 to 60 parts of isophorone diisocyanate, 3 to 5 parts of bisphenol A epoxy resin E-44, 3 to 5 parts of 1, 3-butanediol, 1, 3-butanediol and 1, 3-butanediol. The coating is prepared from the following raw materials in parts by weight: 1-2 parts of 1, 4-butanediol, 0.2-0.6 part of dibutyltin dilaurate, 0.6-1.0 part of 3-aminopropyltriethoxysilane, 3-5 parts of modified carbon nanotubes, 2-4 parts of a curing agent, 1-1.5 parts of an ultraviolet absorbent and 0.8-1.2 parts of an antioxidant. The bio-based polyurethane hot melt adhesive prepared by the invention not only has better adhesive property, but also has excellent mechanical property and aging resistance, and the quality of the bio-based polyurethane hot melt adhesive is ensured while the service life of the bio-based polyurethane hot melt adhesive is effectively prolonged.

The invention relates to the technical field of aluminum alloys, in particular to a high-strength wear-resistant aluminum alloy material and a preparation process thereof. Aluminum alloy raw materials are subjected to smelting, casting, high-temperature heat preservation, extrusion forming and stretching forming, and the aluminum alloy plate is obtained. And the surface of the aluminum alloy plate is subjected to thermal diffusion treatment, and the high-strength aluminum alloy plate is obtained. And then modified chitosan, paraffin, a vanillin solution, a sodium tartrate solution and the like are added to prepare the microcapsule corrosion inhibitor. The preparation method comprises the following steps: mixing isophorone diisocyanate, hydroxypropyl polydimethylsiloxane, a microcapsule corrosion inhibitor and dibutyltin dilaurate to obtain an organic silicon modified polyurethane resin prepolymer, and adding various assistants to obtain the high-performance coating. And the surface of the high-strength aluminum alloy plate is coated with the high-performance coating, and a finished product is obtained after drying.

The invention discloses a high-performance polyurethane paint and a preparation method thereof, and particularly relates to the technical field of coatings. The high-performance polyurethane paint is prepared from the following components in parts by weight: 45 to 60 parts of functional polyurethane prepolymer, 4 to 7 parts of modified kaolin, 1 to 3 parts of propylene glycol methyl ether acetate, 0.1 to 0.5 part of defoaming agent, 0.2 to 0.6 part of flatting agent, 10 to 15 parts of titanium dioxide and 0.5 to 1 part of dispersing agent, the preparation method of the functional polyurethane prepolymer comprises the following steps: mixing polytetrahydrofuran glycol, diisocyanate and dibutyltin dilaurate to carry out a first reaction, and then adding a functional diol monomer to carry out a second reaction, thereby obtaining the functional polyurethane prepolymer. The coating is mildew-proof and antibacterial, and has good waterproof self-cleaning performance, mechanical property and storage stability.

The invention belongs to the technical field of acrylic plates, and particularly relates to a continuous casting high-hardness acrylic plate and a preparation method thereof.The preparation method comprises the steps that siloxane modified methacrylic acid, methyl methacrylate and n-butyl methacrylate are mixed, an azo initiator is added into the mixture, and then stirring and mixing are conducted to obtain pre-polymerized slurry; the preparation method comprises the following steps: mixing hydroxyl-terminated ether polysiloxane, isophorone diisocyanate and a catalyst dibutyltin dilaurate, reacting to obtain a macromolecular prepolymer, and then adding an end-capping reagent and a photoinitiator into the macromolecular prepolymer to obtain coating slurry; and injecting the pre-polymerized slurry between two annular steel belts which operate synchronously, coating the two annular steel belts with the coating slurry, and carrying out ultraviolet curing to obtain the high-hardness acrylic plate. Through ultraviolet curing, a high-hardness layer is formed outside the acrylic plate, polyurethane is modified by hydroxyl-terminated ether polysiloxane, the rigidity of a soft chain segment is improved by a polysiloxane chain segment, and the hardness of polyurethane is improved.

The invention belongs to the field of membrane materials, and particularly relates to a polyether-based block copolymer and a preparation method and carbon capture application thereof. According to the invention, dichloromethane is taken as a solvent, trifluoromethanesulfonic acid is taken as an initiator, and in the presence of a chain transfer agent ethylene glycol, 1, 3-dioxolane is subjected to cationic ring-opening polymerization to generate PDXL (HO-PDXL-OH) of which two terminal groups are hydroxyl groups. Further, N, N-dimethylformamide is used as a solvent, dibutyltin dilaurate is used as a catalyst, and HO-PDXL-OH and diphenylmethane diisocyanate are subjected to polycondensation to synthesize block copolymer polyurethane (PU). The polyether-based segmented copolymer prepared by the preparation method disclosed by the invention is used as a gas separation membrane material and has relatively high CO2 capture performance, and the CO2 separation performance of the polyether-based segmented copolymer is superior to that of other polyether-based membrane materials and is close to the Robeson upper limit.

The invention relates to rosin modified resin and a preparation process thereof and low-odor printing ink, the rosin modified resin is prepared from maleic anhydride, sulfonate alkyd resin, rosin and a metal organic framework, and the sulfonate alkyd resin is prepared from neopentyl glycol, dibutyltin dilaurate, m-phthalic acid-5-sodium sulfonate, phthalic anhydride and pentaerythritol. The printing ink has the effect of improving the strength and smell of the printing ink.

The invention provides a fire-resistant inorganic fiber cotton board and a preparation method thereof, and belongs to the technical field of fire-resistant materials. The preparation method comprises the following steps: carrying out acid leaching treatment on sepiolite powder by using phosphoric acid, loading ammonium polyphosphate, drying and crushing to obtain a product A; enabling DOPO to react with gamma-aminopropyltriethoxysilane, and stirring and dissolving to obtain a product B; methyltrimethoxysilane and diethanol amine are subjected to hydrolytic polycondensation, dibutyltin dilaurate is added for continuous reaction, and a product C is obtained; combining raw materials including sodium silicate, potassium silicate, the product A, the product B, the product C and the like to prepare a curing liquid; melting and centrifuging the slag into cotton, and carrying out wet forming to obtain an inorganic fiber cotton plate rough blank; and the inorganic fiber cotton board rough blank is subjected to vacuum dehydration, then a curing liquid is sprayed, and the fireproof inorganic fiber cotton board is obtained after drying. The inorganic fiber cotton board is subjected to double-sided spraying by adopting the new curing liquid, so that the fireproof performance is high, and the mechanical property of the inorganic fiber cotton board can be enhanced.

The invention discloses a high-performance anti-corrosion coating based on a layered nano material and a preparation method of the high-performance anti-corrosion coating. The anticorrosive paint is prepared from raw materials including a component A and a component B. The component A comprises epoxy resin, modified MXene nanosheets, modified graphene oxide, nano clay, zinc powder, a corrosion inhibitor, a defoaming agent, a flatting agent and ethylene glycol butyl ether, the modified MXene nanosheets are obtained by conducting surface treatment on the MXene nanosheets through a silane coupling agent, and the modified graphene oxide is obtained by conducting surface treatment on the modified MXene nanosheets through a silane coupling agent. The modified graphene oxide is obtained by modifying graphene with toluene diisocynate and dibutyltin dilaurate; and the component B is a polyamide resin curing agent. According to the anticorrosive paint disclosed by the invention, through interlayer intercalation and surface functional modification of MXene and graphene oxide, a compact physical barrier is formed, the interface bonding force is enhanced, and the permeability resistance is remarkably improved; the corrosion inhibitor is encapsulated in the layered structure, and when the coating is damaged, the corrosion inhibitor can be actively released to repair local microcracks.

The invention discloses a transparent polyurethane elastomer and a preparation method thereof, and relates to the technical field of polyurethane elastomers, the preparation method comprises the following steps: carrying out vacuum dehydration on polytetrahydrofuran ether glycol-2000 and polytetrahydrofuran ether glycol-1000 for later use; the preparation method comprises the following steps: preheating a reaction container, adding isophorone diisocyanate and benzoyl chloride, uniformly stirring, adding polytetrahydrofuran ether glycol-2000 and polytetrahydrofuran ether glycol-1000, and carrying out heat preservation reaction to obtain a polyurethane prepolymer; uniformly stirring polyether polyol N330, a chain extender, dibutyltin dilaurate, silicone oil, a defoaming agent, an antioxidant and an ultraviolet light absorber, carrying out vacuum degassing, adding into the polyurethane prepolymer, uniformly stirring, pouring into a mold, curing, molding and demolding to obtain the transparent polyurethane elastomer.

The application discloses a kind of high waterproof moisture-permeable polyurethane film materials and high waterproof moisture-permeable fabric, it is related to polyurethane film material technical field, high waterproof moisture-permeable polyurethane film material, including following raw materials: polyether diol, diisocyanate, organic solvent, modified porous biochar, modified diatomite, chain extender, thickening agent, defoaming agent, ultraviolet absorber, dibutyltin dilaurate;The modified porous biochar is prepared by activating corn straw powder by potassium phosphate and potassium hydroxide in cooperation, and polyethylene glycol is added as a dispersant, and the modified porous biochar is treated by mercapto and fluorination modification;By introducing potassium phosphate in cooperation with potassium hydroxide to form an activation system in the preparation of modified porous biochar in polyurethane film material, combined with polyethylene glycol, dispersion optimization and reduction synergy are realized, and the moisture permeability, waterproofness, mechanical properties and durability of the material are improved.

The invention belongs to the technical field of pesticide preparations, and relates to a preparation method and application of prothioconazole sustained-release microspheres. The preparation method comprises the following steps: adding an active compound, an emulsifier, isocyanate and polycaprolactone polyol into cyclohexanone, and uniformly mixing to obtain an oil phase; adding a dispersing agent into water and uniformly mixing to obtain a water phase; and adding dibutyltin dilaurate into the oil phase, reacting, mixing with the water phase, shearing, and stirring to obtain the prothioconazole sustained-release microsphere suspending agent. The prothioconazole sustained-release microsphere prepared by the process still keeps higher bactericidal activity on the premise of good leaf surface stability, so that reduction of the pesticide application frequency, improvement of the pesticide utilization rate and long-acting prevention and control of prothioconazole in the field are expected to be realized, and the prothioconazole sustained-release microsphere conforms to the national double reduction policy and is suitable for large-scale popularization and application.

The application provides a wear-resistant transparent flexible fluorine-free super-hydrophobic composite coating and a preparation method thereof. The preparation method comprises the following steps: mixing and reacting hydroxyl-terminated polydimethylsiloxane, gamma-aminopropyl triethoxysilane and dibutyl tin dilaurate to obtain a modified precursor solution, adding swelled epoxy resin into the modified precursor solution, and obtaining a siloxane modified epoxy resin after heating reaction; dispersing nano-silicon dioxide in an ethyl acetate solution to form a SiO2 suspension; uniformly mixing the modified epoxy resin and the SiO2 suspension, adding polyether amine as a curing agent, and stirring and mixing, and then adopting an air spraying mode to build an epoxy resin / hydroxyl-terminated polydimethylsiloxane / nano-silicon dioxide super-hydrophobic coating on a substrate. The preparation method can prepare a super-hydrophobic coating with excellent transparency and flexibility, good adhesion and wear resistance, and has a wide application prospect in the fields of wearable electronic devices and optoelectronic devices.

The invention relates to the technical field of coatings, in particular to a bio-based polyurethane waterproof coating and a preparation method thereof. The coating is prepared from organic fluorine-silicon cross-linked castor oil, dibutyltin dilaurate, an HDI tripolymer, polytetrahydrofuran ether glycol, 1, 4-butanediol, a filler, a plasticizer and an ultraviolet light absorber, and the organic fluorine-silicon cross-linked castor oil is obtained by silanization modification of methyl ricinoleate and hydrolysis cross-linking of fluorine-containing silane. The preparation method is simple, and the material has excellent performance, is suitable for the fields of building waterproofing, weather-resistant coatings and the like, and has wide application potential and market value.

The present invention relates to the technical field of polyurethane synthesis, and specifically to a method for preparing a highly wear-resistant polyurethane elastomer, comprising the following steps: placing porous particles in an oily liquid of dibutyltin dilaurate, heating and stirring, filtering, dispersing the filtered porous particles, cooling and storing; stirring a hydroxyl-terminated polyurethane prepolymer, a diisocyanate, a chain extender, porous particles, a stabilizer, carbon black, and a coupling agent at low temperature, uniformly pouring the mixture into a mold, subjecting the mold to microwave treatment, placing the mold in a constant temperature chamber for reaction, and demolding the resulting product. The present invention solidifies the dibutyltin dilaurate catalyst in the porous particles, heats the porous particles during microwave treatment, causing them to melt and diffuse into the raw material mixture, and catalytic polymerization occurs under heating in the constant temperature chamber. The resulting polyurethane product exhibits significantly improved properties such as wear resistance, high temperature resistance, and impact resistance.

The invention relates to the field of sponge materials, and provides a flame-retardant sponge material as well as a preparation method and application thereof. The flame-retardant flame-retardant coating is prepared from the following components: phosphorus-based flame retardant modified oxidized feather-shaped carbon nanotubes, phosphorus-containing diol modified silicon dioxide aerogel, polyurethane, aluminum hydroxide, ammonium tripolyphosphate, toluene diisocyanate, deionized water, cyclopentane, triethanolamine, dibutyltin dilaurate, epoxidized soybean oil, talcum powder, an antioxidant, a light stabilizer, pigment and antimony trioxide. The composite material is prepared from expanded graphite, a silicone oil surfactant, an isothiazolinone antibacterial agent and a phosphorus-based flame retardant modified oxidized feather-shaped carbon nanotube through wet oxidation and dimethyl methylphosphonate modification, and phosphorus-containing diol is prepared from diethyl phosphite, diethanol amine and paraformaldehyde through condensation. The sponge disclosed by the invention has excellent mechanical and flame-retardant properties, and is widely applied to the fields of buildings, home furnishing and transportation.

The preparation process comprises the following steps: mixing a modified monomer, acrylic acid, butyl acrylate, hydroxyethyl acrylate, azodiisobutyronitrile and acetone to react to prepare a functional prepolymer, mixing and stirring the functional prepolymer and the acetone, adding dibutyltin dilaurate and a modifier, reacting, then adding an initiator, and reacting to obtain the high-gloss antibacterial UV veneer. The functional coating is smeared on the surface of the shaving board, and ultraviolet irradiation curing is carried out, the modified monomer is of a hyperbranched structure, when the modified monomer is polymerized with other monomers, polymer molecules are changed into the hyperbranched structure from the original chain structure, and then the strength of a paint film is enhanced; a molecular chain segment contains an organic silicon chain segment, the service life of a surface paint film is prolonged, a quaternary ammonium salt structure of a side chain has positive electricity and can adsorb bacteria, cell membranes are damaged, the antibacterial effect is achieved, meanwhile, the glossiness of the surface of the paint film is improved through nanometer titanium dioxide, and the attractiveness of the veneer is guaranteed.

The present invention provides a PUR hot melt adhesive for textile use and a preparation method thereof, wherein the adhesive comprises the following components in parts by weight: 88-102 parts of a polyurethane prepolymer, 10-20 parts of a hydroxy acrylate, 6.5-10 parts of a chain extender, 3-9 parts of a light-activated latent curing agent, 8-11 parts of a plasticizer, 1-2.8 parts of a cross-linking agent, 3-6 parts of a tackifier, 0.1-1 parts of a stabilizer, 0.01-0.03 parts of dibutyltin dilaurate, 1.3-2.2 parts of a photoinitiator, and 0.5-0.8 parts of a magnetic medium type absorbent; the polyurethane prepolymer is prepared by reacting a polyester polyol or a polyether polyol with a diisocyanate. The chain extender, the magnetic medium type absorbent, the plasticizer, the cross-linking agent, the tackifier, the stabilizer, and the photoinitiator are all selected from specific components or mixtures. The preparation method comprises generating a polyurethane prepolymer, preparing a polyurethane elastomer, forming a stable adhesive system, and finally preparing a PUR hot melt adhesive. The adhesive has good bonding properties and water-resistant properties and is suitable for the lamination of textile fabrics.

The invention discloses a method for preparing organic nutrient soil from sludge. The method comprises the following steps: S1, dewatering and drying, S2, innocent treatment, S3, carbon nitrogen ratio adjustment, S4, nutrient soil formula optimization, S5, screening and granulation, and S6, adding 7-18 parts of pentaerythritol, 5-12 parts of castor oil and 15-34 parts of APTES into a stirrer, and stirring and mixing for 30-45 min. Adding 13 to 27 parts of isocyanate monomer and 0.03 to 0.2 part of dibutyltin dilaurate (DBTDL), mechanically stirring for 50 to 65 minutes, and baking for 2.5 to 3.5 hours at the temperature of 75 to 125 DEG C, so as to obtain a coating; s7, the particles prepared in the step S4 and the coating obtained in the step S6 are put into a heater and stirred, and then the organic nutrient soil is prepared. According to the invention, pentaerythritol is used as a chain extender, so that more crosslinking sites are provided, the hydroxyl density of pentaerythritol is high, and pentaerythritol reacts with silica groups to form a more compact Si-O-C network structure.

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 an inorganic-organic hybrid cross-linked network high-toughness material and a preparation method thereof, and belongs to the technical field of engineering material preparation. The high-toughness material is composed of an inorganic phase component and an organic phase component, the inorganic phase component is prepared from 5 to 10 parts of amino modified silicon dioxide nanoring; the organic phase component is prepared from the following components in parts by weight: 90 to 105 parts of polycaprolactone glycol, 14.5 to 16.5 parts of isophorone diisocyanate, 0.8 to 1.5 parts of dibutyltin dilaurate, 4 to 6 parts of bis-catechol borane and 6 to 10 parts of polydopamine nano particles. The fracture performance of the material can reach 20 kJ / m or above and is far higher than-1 kJ / m of a common elastomer and-10 kJ / m of high-toughness hydrogel, and meanwhile the tensile strength of 30 MPa or above is kept. According to the material disclosed by the invention, the dynamic borate bond is utilized, after the material is in contact with a damaged section, efficient self-repairing can be realized after the material is placed at room temperature for 24 hours, and the repairing efficiency is gt; by heating and applying pressure, the whole material can be reshaped through fracture and recombination of the dynamic bonds, and green and sustainable effects are achieved.

The invention relates to the field of ice-resistant coatings, and discloses a low-temperature self-healing photo-thermal ice-resistant coating as well as a preparation method and application thereof. The method is carried out in the presence of an organic solvent and comprises the following steps: (1) carrying out first heating treatment on dihydroxyl-terminated polydimethylsiloxane, isophorone diisocyanate and dibutyltin dilaurate to obtain a prepolymer; (2) carrying out second heating treatment on the prepolymer, 4, 4 '-dithio diphenylamine and 4, 4'-bis (hydroxymethyl)-2, 2 '-bipyridine, so as to obtain a polymer SH; and (3) contacting and mixing the polymer SH and graphene oxide to obtain the photo-thermal ice-resistant coating. The photo-thermal ice-resistant coating prepared by the method provided by the invention is applied to the surface of a fan blade as an ice-resistant coating, has good mechanical durability and photo-thermal performance, and is excellent in ice resistance.

The invention relates to the technical field of light building boards, in particular to a heat preservation and insulation polyurethane sandwich building board and a preparation method thereof. The method comprises the following steps: polishing, washing and drying the inner surface of an aluminum plate to obtain a pretreated aluminum plate; the two pretreated aluminum plates are fixed in parallel, and the peripheries are sealed to form a pouring cavity; the preparation method comprises the following steps: mixing polyether polyol, a hydroxylated flame retardant, flame-retardant polyol, a surfactant, triethylamine, triethylene diamine, dibutyltin dilaurate and deionized water, uniformly stirring, then adding polyisocyanate, and uniformly stirring again to obtain a polyurethane foaming mixture; and pouring the polyurethane foaming mixed material into the cavity, and curing to obtain the polyurethane sandwich building board. The polyurethane sandwich building board prepared by the invention has excellent thermal insulation property and flame retardance, so that the polyurethane sandwich building board has a wide application prospect in the technical field of light building boards.