384 results about "Dibutyl tin dilaurate" patented technology

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 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 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 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 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 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 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.

The invention relates to the technical field of polyurethane adhesives, and particularly discloses a special polyurethane adhesive as well as a preparation method and application thereof. The invention discloses a special polyurethane adhesive. Comprising the following raw materials in parts by weight: 40 to 45 parts of castor oil, 25 to 30 parts of polycaprolactone glycol, 30 to 35 parts of isophorone diisocyanate, 0.05 to 0.1 part of dibutyltin dilaurate, 5 to 8 parts of dimethylolpropionic acid, 3 to 5 parts of a sulfur-containing chain extender, 4 to 6 parts of a functional filler, 3 to 5 parts of hexadecyl trimethoxy silane, 8 to 12 parts of hydroxyethyl methylacrylate, 0.8 to 1.2 parts of a photoinitiator and 60 to 70 parts of deionized water. The special polyurethane adhesive prepared by the invention adopts a unique raw material formula and process, has the characteristics of light curing and water dispersion, forms a compact cross-linked network after being cured, shows excellent heat and humidity resistance, interface bonding strength and mechanical stability, and can be applied to the field of adhesive materials. The adhesive is suitable for material surfaces with high-performance bonding requirements in the fields of automobiles, electronics, buildings and aerospace.

The invention discloses a hydrophobic anti-icing material based on silver ions and application in a power transmission line, and belongs to the technical field of hydrophobic anti-icing materials, the hydrophobic anti-icing material is prepared from the following raw materials in parts by weight: 80-120 parts of hydroxyl-terminated polydimethylsiloxane, 5-15 parts of tetraethoxysilane, 0.5-3 parts of silver nitrate, 3-10 parts of hydrophobic nano silicon dioxide and 1-5 parts of nano titanium dioxide. The invention discloses an anti-icing and deicing composite material, which is prepared from the following components in parts by weight: 80 to 120 parts of butyl acetate, 0.1 to 0.5 part of dibutyltin dilaurate, 0.5 to 2 parts of sodium citrate and 2 to 5 parts of modified fluorinated phosphotungstic acid imidazole compound, and solves the problems that the existing material is insufficient in photo-thermal utilization rate, poor in stability in a severe environment, insufficient in hydrophobic capacity and difficult to give consideration to anti-icing and deicing effects. According to the scheme, the modified fluorinated phosphotungstic acid imidazole compound and silver ions are introduced to form a synergistic effect, formation of an ice layer is inhibited, melting of the ice layer is promoted, meanwhile, lasting super-hydrophobicity is provided, a durable hydrophobic anti-icing coating based on the silver ions is formed, and the safety of a power grid is guaranteed.

The invention discloses cold-resistant and tear-resistant coating resin and a preparation method thereof, and relates to the technical field of coatings. The invention discloses cold-resistant and tear-resistant coating resin. The invention relates to a water-based paint, which is prepared from the following raw materials in parts by weight: 40 to 60 parts of modified epoxy resin, 15 to 25 parts of poly (hexanediol adipate), 5 to 10 parts of modified nano silicon dioxide, 8 to 15 parts of diphenylmethane diisocyanate, 3 to 8 parts of trimethylolpropane, 10 to 20 parts of methyl methacrylate, 8 to 15 parts of butyl acrylate, 0.5 to 2 parts of benzoyl peroxide and 0.2 to 0.8 part of dibutyltin dilaurate. The invention relates to an anti-aging coating which comprises the following components in parts by weight: 20-30 parts of a silane coupling agent, 1-3 parts of a silane coupling agent KH-550, 0.3-1 part of an anti-aging agent 264, 5-12 parts of dioctyl phthalate and 20-35 parts of a mixed organic solvent. The raw materials are scientifically proportioned, and the cold resistance and tear resistance of the coating are remarkably improved through the synergistic effect of the modified epoxy resin and the modified nano silicon dioxide; water is strictly controlled in the whole process, side reaction is avoided, and stable resin structure is guaranteed; the preparation steps are clear and definite, the repeatability is high, the solvent system adaptability is good, construction is convenient and fast, and the method is suitable for base material protection in various low-temperature scenes.

The application discloses a preparation method of a photo-thermal ice-resistant super-hydrophobic coating and the super-hydrophobic coating, and comprises the following steps: heating and vacuumizing polytetrahydrofuran (PTMG) to remove water, so as to obtain PTMG after water removal; heating and vacuumizing hydroxypropyl-terminated polydimethylsiloxane (PDMS-OH) to remove water, so as to obtain PDMS-OH after water removal; mixing the PDMS-OH after water removal and the PTMG after water removal, adding ethyl acetate solvent to stir, adding dicyclohexylmethane diisocyanate (HMDI) and dibutyltin dilaurate (DBTDL) dropwise, pre-polymerizing, adding di(2-hydroxyethyl) disulfide (HEDS) when the reaction reaches equilibrium, and preparing polyurethane after the reaction is completed; mixing ZrN nanoparticles, SiO2-F and the polyurethane to obtain a suspension through ultrasonic treatment; spraying the suspension to obtain a coating, and drying the coating to obtain the photo-thermal ice-resistant super-hydrophobic coating. The coating prepared by the application has excellent ice-resistant performance, and can delay the icing time for up to 1422s at-20 DEG C, and the icing time of a blank control group is 17s, which is better than most of the known ice-resistant super-hydrophobic coatings.

The invention relates to the technical field of high polymer materials, and particularly discloses a flame-retardant heat-conducting silica gel insulating coating and a preparation method thereof. The invention discloses a flame-retardant heat-conducting silica gel insulating coating. Comprising the following components: polydimethylsiloxane, aluminum hydroxide, modified nano aluminum oxide, a phosphorus-nitrogen flame retardant, silicon dioxide, methyltris (methylethylketoxime) silane, vinyltris (methylethylketoxime) silane, dibutyltin dilaurate, a diluent, amino propyl triethoxy silane, propyl trimethoxy silane and ethyl aminopropyl trimethoxy silane. And the polydimethylsiloxane is formed by compounding polydimethylsiloxane with the viscosity of 1,500 cp and polydimethylsiloxane with the viscosity of 20,000 cp. According to the invention, by finely blending the proportion of various functional components, especially the optimal combination of polydimethylsiloxane, modified nano aluminum oxide, the flame retardant and the filler, the flame retardance and thermal conductivity of the coating are effectively improved, and meanwhile, good insulativity and mechanical properties are ensured.

The invention discloses a high-strength waterproof polyurethane adhesive and a preparation method thereof, and relates to the technical field of polyurethane adhesives. The invention relates to a flame-retardant polyurethane elastomer, which is prepared from the following ingredients in parts by weight: 40 to 60 parts of polyether polyol, 20 to 30 parts of polyester polyol, 25 to 35 parts of modified diphenylmethane diisocyanate (MDI), 5 to 10 parts of nanometer silicon dioxide, 1 to 3 parts of silane coupling agents, 3 to 5 parts of 1, 4-butanediol (BDO), 0.1 to 0.3 part of dibutyltin dilaurate (catalysts), 0.5 to 1 part of antioxidants and 0.2 to 0.5 part of ultraviolet light absorbers. Through polyether / polyester polyol compounding and MDI reaction, a microphase separation structure is formed, cohesion strength is improved, nano-silica and KH-550 synergistically enhance interface bonding force and inhibit water molecule permeation, the strength retention rate after water resistance is larger than 90%, and the water-resistant polyurethane elastomer is suitable for long-term use in a high-humidity environment.

The invention belongs to the technical field of metal material plating, and particularly relates to a connector surface composite coating and a preparation process thereof, and the preparation process comprises the following steps: adding modified carbon black and sodium molybdate into deionized water, stirring to obtain a corrosion inhibition material, and mixing with modified zinc oxide to obtain a mixed filler; the preparation method comprises the following steps: adding dibutyltin dilaurate and toluene diisocynate into polypropylene glycol to obtain a core material; adding hexadecyl trimethyl ammonium bromide and the mixed filler into a 93-96 wt% ethanol solution, adding the core material for emulsification, adding an isophorone diisocyanate solution, and stirring to obtain a microcapsule; nickel sulfate hexahydrate, nickel chloride hexahydrate, sodium citrate, boric acid, a surface dispersant, a sodium hydroxide solution and microcapsules are added into deionized water to be mixed, and an electroplating solution is obtained; and putting the connector into the electroplating solution for electroplating to obtain the composite coating. The expansion of pitting corrosion can be inhibited, and the long-term use reliability and stability of the connector in a marine environment are improved.

The invention belongs to the field of manufacturing of automobile parts, and particularly relates to a preparation process of a polyurethane foaming high polymer material, which comprises the following steps: uniformly mixing polyether polyol, a copper-plated graphite-graphene material, a foaming agent, dibutyltin dilaurate and silicone oil, then adding isophorone diisocyanate, uniformly mixing, and carrying out extrusion molding to obtain the polyurethane foaming high polymer material. Pouring into a mold, foaming in a megasonic environment, and after foaming is finished, feeding into a drying oven for curing; the polyurethane foaming high polymer material is obtained; the material is good in heat-conducting property, and the heat-conducting property cannot be obviously reduced even after long-term repeated extrusion and rebounding; even if the material is dried after absorbing moisture / water, the heat-conducting property and the sound-absorbing property are not obviously reduced; the invention has high application value and is especially suitable for the automobile field.

The invention discloses a silane modified polyether sealant and a preparation method thereof, and belongs to the technical field of sealants. The sealant is prepared from the following raw materials in parts by mass: 80 to 100 parts of MS prepolymer, 1 to 3 parts of silane coupling agent, 10 to 20 parts of plasticizer, 10 to 30 parts of polydopamine modified boron nitride, 40 to 60 parts of nano calcium carbonate, 0.3 to 0.5 part of dibutyltin dilaurate, 0.1 to 0.4 part of light stabilizer and 0.5 to 1 part of ultraviolet absorbent. Wherein the MS prepolymer is obtained by carrying out hydrosilylation reaction on modified allyl-terminated polyether and hydrogen-containing silane, and a side chain of a molecular chain of the modified allyl-terminated polyether contains a benzoic acid structure. A rigid unit with an aromatic ring structure and polar carboxyl are introduced into a polyether long-chain side chain of silane modified polyether to form an MS prepolymer, and the MS prepolymer and polydopamine modified boron nitride have a synergistic effect, so that the sealant is endowed with high hardness and good flexibility.

The invention relates to the technical field of polystyrene foam, in particular to bi-component polyurethane polystyrene foam based on a microencapsulation catalyst and a preparation method of the bi-component polyurethane polystyrene foam. The component A comprises polyether polyol, isocyanate and a modified nano composite system; the component B comprises polyether triol, a foaming agent and a microencapsulation catalyst, and the microencapsulation catalyst is dibutyltin dilaurate coated with a polyurea shell layer; a microencapsulation catalyst is introduced into the component B through a low-speed dispersion process before mixing, and a polyurea shell layer is broken through mechanical shear force during mixing to release dibutyltin dilaurate. The microencapsulation catalyst is broken during sizing, compared with a traditional catalytic system, the curing time is greatly shortened, silane coupling agent modified nano silicon dioxide and carbon nano tubes are introduced to synergistically enhance the filler, and the mechanical strength and aging resistance of the polystyrene foam are enhanced.

The invention discloses a preparation process of coating slurry for a lithium ion battery diaphragm. Comprising the following steps: step 1, uniformly mixing polyether polyol, a modified additive, dibutyltin dilaurate, dimethylolpropionic acid and isophorone diisocyanate, under a protective atmosphere, raising the temperature to 80-90 DEG C, reacting for 3-4 hours, then adding 1, 4-butanediol, continuously reacting for 3-4 hours, after the reaction is finished, cooling to 40-50 DEG C, then adding triethylamine, stirring for 30-40 minutes, and then, carrying out heat preservation for 30-40 minutes, so as to obtain a polyurethane prepolymer; slowly adding deionized water to obtain a polyurethane adhesive; 2, inorganic particles, a polyurethane adhesive and a dispersing agent are mixed and stirred at the normal temperature for 10-12 h, and the coating slurry is obtained. The flame-retardant battery diaphragm has the beneficial effects that the flame-retardant unit and the modified additive of the quaternary ammonium salt group are introduced into a polyurethane adhesive system, so that the prepared battery diaphragm has excellent flame retardance, enhanced mechanical property and good electrolyte wettability.

The invention discloses a light soft polyurethane material for a soft volleyball and a preparation method of the light soft polyurethane material, and relates to the technical field of polyurethane materials. The preparation method comprises the following steps: S1, adding polyether glycol, polyester glycol and isophorone diisocyanate into acetone under the protection of nitrogen, uniformly stirring and mixing, then adding dibutyltin dilaurate, and stirring and reacting at 75-85 DEG C for 1-3 hours; s2, adding a lignin-based chain extender into the reaction system, stirring and heating to 80-90 DEG C, stirring and reacting for 1-3 hours, then adding a diamine chain extender, and keeping the temperature and stirring and reacting for 30-60 minutes; s3, finally, activated calcium carbonate is added into a reaction system, stirring and mixing are conducted for 1-2 h, acetone is removed through rotary evaporation, and the light soft polyurethane material is obtained. The light soft polyurethane material has excellent mechanical properties, ultraviolet resistance and aging resistance, and light volleyballs obtained through processing are excellent in performance and better in applicability.

The invention provides a preparation technology of shape memory polyurethane (SMPU) with remarkably enhanced shape memory performance, which comprises the following steps: the material takes polyether polyol as a soft segment to effectively memorize a temporary shape; a diisocyanate tripolymer and a novel chain extender are used as hard segments, so that the memory of a permanent shape is ensured. Under the catalytic action of dibutyltin dilaurate, carbonyl of a diisocyanate tripolymer and ureido in the novel chain extender form a self-assembly structure, so that the shape memory performance of the material is remarkably improved. Results show that two SMPU thin films based on the SMPU thin films both show the shape recovery rate of more than 90%, and both have excellent cycle stability, and show huge potential and application value in the field of shape memory materials.