606 results about "Polytetrahydrofuran" patented technology

The invention belongs to the technical field of polyurethane elastomers, and particularly relates to a high-static-rigidity high-damping low-pressure-change polyurethane elastomer and a preparation method thereof. Comprising a polyol component and an isocyanate component, and the polyol component comprises polyol A, a chain extender, a stabilizer, a hydrolysis-resistant agent and a catalyst; the isocyanate component is prepared from isocyanate, polyhydric alcohol B and branched chain unit alcohol; the polyol A comprises amine ether polyol and polytetrahydrofuran ether polyol; the polyhydric alcohol B comprises bio-based hydrolysis-resistant polyhydric alcohol and polytetrahydrofuran ether polyhydric alcohol; the bio-based hydrolysis-resistant polyol is prepared by carrying out a reaction on sebacic acid, 1, 2-propylene glycol and 1, 4-butanediol; the branched-chain unit alcohol is prepared from tetrahydrofuran and isooctanol through a reaction. By introducing the bio-based hydrolysis-resistant polyhydric alcohol and branched chain monohydric alcohol, the damping effect is remarkably enhanced, and on this basis, through formula adjustment and raw material screening, the product toughness is greatly improved, the compression set is reduced, and the performance of the product in heavy haul railway application is effectively optimized.

The invention provides a robot joint dynamic cable made of a self-repairing polyurethane material and a preparation method of the robot joint dynamic cable, and belongs to the field of cables. Polytetrahydrofuran glycol and hexamethylene diisocyanate react to form a soft and hard segment structure, 1, 4-butanediol is added for chain extension, dopamine hydrochloride is introduced, the hard segment structure is enhanced, and a self-repairing hydrogen bond network is formed; carbon nanotubes are introduced, and through plasma treatment and silane coupling agent modification, the tensile resistance, fatigue resistance and electrical properties of the material are improved; montmorillonite is compounded with polyethyleneimine through organic treatment, so that the cracking resistance and wear resistance of the material are enhanced; epoxy groups are introduced to the surface of boron nitride, and dopamine hydrochloride is self-polymerized, so that excellent heat dissipation capability and dimensional stability are provided. Through the synergistic effect of the components, the composite material has excellent mechanical properties, electrical properties, heat dissipation, wear resistance and the like, is especially suitable for a dynamic cable of a robot, and can stably work in a complex environment for a long time.

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

The invention belongs to the technical field of polyurethane materials, and provides a high-damping anti-fatigue and anti-aging polyurethane elastomer and a preparation method thereof. The high-temperature-resistant polyurethane elastomer is prepared from the following raw materials in parts by weight: 20 to 30 parts of poly (diethylene glycol adipate) glycol (PDA), 30 to 50 parts of polytetrahydrofuran ether glycol (PTMEG), 5 to 15 parts of chain extender, 0.1 to 0.3 part of A33, 0.1 to 0.2 part of organic tin catalyst, 2 to 5 parts of hindered phenol antioxidant, 1 to 3 parts of hindered amine light stabilizer, 3 to 8 parts of nano particles and 30 to 50 parts of isocyanate prepolymer. The isocyanate prepolymer is prepared from 1, 4-phenyl diisocyanate (PPDI) and branched chain-containing polytetrahydrofuran glycol PTXG according to a mass ratio of 1: (1.8 to 2.2). The polyurethane elastomer is excellent in damping performance and fatigue aging resistance, and meets the use requirements under complex working conditions.

The invention belongs to the technical field of conductive adhesives, and particularly relates to a salt-fog-resistant waterborne conductive adhesive and a preparation method thereof.The salt-fog-resistant waterborne conductive adhesive is mainly prepared from, by weight, 5-10 parts of salt-fog-resistant waterborne polyurethane; 5 to 10 parts of water-based tackifying resin; 30 to 50 parts of conductive silver powder; 10 to 20 parts of ethanol; 2-10 parts of an anti-hydrolysis agent; and 10-30 parts of deionized water. According to the salt-fog-resistant aqueous conductive adhesive, polyurethane resin with polytetrahydrofuran alcohol and polycaprolactone polyol as main structures is used as matrix resin, a system is endowed with excellent water resistance and salt-fog resistance, the salt-fog-resistant aqueous conductive adhesive shows outstanding hydrolysis-resistant stability after being cured, and the salt-fog-resistant aqueous conductive adhesive and the conductive silver powder have a synergistic effect, so that the anti-settling performance is effectively improved.

The invention discloses a wear-resistant vehicle body film and a preparation method thereof, and relates to the technical field of films. The wear-resistant automobile body film prepared by the invention is prepared from polytetrahydrofuran ether glycol, isophorone diisocyanate, a catalyst, dihydric alcohol quaternary ammonium salt, a functional aid, modified silicon dioxide and a chain extender. The dihydric alcohol quaternary ammonium salt is obtained by reacting N, N '-dihexyl-N, N'-dimethyl propane-1, 3-diamine with monochloroacetone and then condensing with glycerol; the functional additive is obtained by reacting 2-boric acid thiophene-4-methyl acetate with 2, 7-dibromofluorene and then carrying out bromination hydrolysis; the modified silicon dioxide is obtained by reacting pretreated silicon dioxide with melamine and then reacting with sodium hypophosphite. The wear-resistant vehicle body film prepared by the invention has good anti-aging, wear-resistant, antibacterial and flame-retardant properties.

The invention relates to a hyaluronic acid-polyurethane composite material based on a double dynamic network and a preparation method and application thereof, and the preparation method comprises the following steps: carrying out hydrophobic modification reaction on hyaluronic acid and aminophenylboronic acid to obtain aminophenylboronic acid modified hyaluronic acid; the preparation method comprises the following steps: mixing polytetrahydrofuran ether glycol, polyethylene glycol and isophorone diisocyanate, carrying out a primary reaction, adding trimethylolpropane tri (3-mercaptopropionic acid) ester, carrying out a secondary reaction, adding tannic acid, and carrying out a third reaction to obtain tannic acid-terminated dynamic thionocarbamate polyurethane; and mixing the amino phenylboronic acid modified hyaluronic acid with the tannic acid terminated dynamic thionocarbamate polyurethane for reaction to obtain the hyaluronic acid-polyurethane composite material with the double dynamic networks. Compared with the prior art, by introducing a'thionocarbamate-borate 'double-dynamic network, high toughness, high strength, good self-repairability and repeatable processability in an extreme environment are realized, and the material is particularly suitable for manufacturing and repairing of key components in an LNG ship body and a heat insulation system thereof.

The invention relates to the technical field of polyurethane, in particular to a bio-based polyurethane buffer material. The material is prepared by foaming and curing a bio-based polyurethane prepolymer. The bio-based polyurethane prepolymer is prepared by the following steps: modifying attapulgite with branched polyol containing quaternary ammonium salt and polytetrahydrofuran ether glycol, and then reacting with raw materials such as soybean oil-based polyol, polytetrahydrofuran ether glycol, isophorone diisocyanate and the like. The bio-based polyurethane buffer material provided by the invention has high compression strength and compression modulus, the hysteresis loss rate is lower than 20%, the elastic recovery rate is higher than 99%, and the bio-based polyurethane buffer material shows excellent rebound resilience and energy absorption capacity, and has excellent adaptability and durability in the fields of high rebound resilience and lightweight design.

The invention provides a modified single-component polyurea waterproof coating as well as a preparation method and application thereof and a hydraulic concrete protective coating structure, and relates to the technical field of hydraulic concrete protection. The modified single-component polyurea waterproof coating provided by the invention is prepared from the following raw materials by mass: polytetrahydrofuran polyol, polyether triol, fluorine-containing polyether polyol, FEVE type fluorocarbon resin, organic silicon polyether glycol, a water repellent agent, isocyanate, a defoaming agent, a diluent, a dispersing agent, a catalyst, a latent curing agent, a coupling agent, a water removal agent, a pigment filler, a thixotropic agent and a plasticizer. The modified single-component polyurea waterproof coating has excellent comprehensive mechanical properties, anti-icing adhesion performance and ice pulling resistance, and the problem of freezing injury is thoroughly solved; the surface roughness is low, the hydrophobicity is high, and resistance and roughness are reduced; the water resistance is high; the coating is high in adhesive force. The modified single-component polyurea waterproof coating is applied to cold region hydraulic concrete anti-freezing damage protection engineering, and the long-term operation protection performance is good.

The invention discloses a light-weight energy-absorbing polyurethane power battery pouring sealant and a preparation method and application thereof.The preparation method comprises the steps that liquid MDI and polytetrahydrofuran glycol serve as raw materials to prepare an isocyanate-terminated polyurethane prepolymer; the polyurethane power battery pouring sealant is prepared by reacting 1, 4-butanediol through adjusting a chain extension coefficient to generate microcellular foaming polyurethane, and a microcellular structure is formed through the reaction, so that the related performance requirements of light weight, energy absorption and the like of the power battery pouring sealant are met; the polyurethane pouring sealant prepared by the invention has the advantages of light weight, and excellent energy absorption and vibration reduction performance, mechanical property, thermal stability and bonding performance; and the preparation process is simple and controllable, environment-friendly and reliable, the cost is low, the stability and safety of the power battery can be improved, the development of new energy automobiles is promoted, and the environment-friendly requirement is met.

The invention relates to the technical field of polyurethane, and discloses a high-conductivity carbon nanotube modified polyurethane fiber membrane, which is characterized in that carbon nanotubes react with 1, 4-butanediamine to obtain aminated carbon nanotubes, 2, 4-toluene diisocynate reacts with polytetrahydrofuran ether glycol to form a polyurethane precursor, and the polyurethane precursor further reacts with 2, 2-dimethylolpropionic acid, 2, 2-dimethylolpropionic acid, 2, 2, 2-trimethyl-1, 3-pentanediol, 2, 2, 4-trimethyl-1, 3-pentanediol, 2, 2, 4-trimethyl-1, 3-pentanediol, 2, 2, 4-trimethyl-1, 3-pentanediol, 2 4-dihydroxyanisole reacts with N-methyldiethanolamine to obtain aldehyde polyurethane, the aldehyde polyurethane reacts with the aminated carbon nanotubes to finally obtain the composite fiber membrane, the interface bonding force of the carbon nanotubes and the polyurethane is enhanced through connection of chemical bonds, and when the composite fiber membrane is subjected to external force, stress passes through chemical cross-linking points, so that the composite fiber membrane is formed. The stress is transferred to the carbon nano tube from the polyurethane matrix, the carbon nano tube can absorb and transfer the stress, and the carbon nano tube can form a conductive network, so that the conductivity of the polyurethane is improved.

The invention discloses polytetrahydrofuran ether amine polyurea with high elongation at break as well as a preparation method and application thereof, and belongs to the technical field of macromolecules. The raw materials comprise a component (A) and a component (B), wherein the component (A) is diisocyanate with a symmetrical linear molecular structure; the component (B) is polytetrahydrofuran ether amine with a symmetrical linear structure, and the molar ratio of the NCO functional group of the diisocyanate to the NH2 functional group of the polytetrahydrofuran ether amine is 1.07-1.00; the molecular structure of the polytetrahydrofuran ether amine polyurea with high elongation at break is a microphase separation structure composed of a hard segment and a soft segment, and the weight percentage of the hard segment relative to the soft segment is greater than 20%. The elongation at break of the polytetrahydrofuran ether amine polyurea product with high elongation at break is 1500% or above, and the polytetrahydrofuran ether amine polyurea product can meet the requirements of expansion joints of ballastless tracks of high-speed railways, expansion joints of highways and airport runways, electronic element potting and the like on the elongation at break of high-elasticity materials.

The invention discloses a photoresponse polymer network based on azo elements and a mechanical interlocking structure as well as a preparation method and application of the photoresponse polymer network. The photoresponse polymer network is obtained through reaction of raw materials including an azo element, polytetrahydrofuran, hexamethylene diisocyanate and a mechanical interlocking unit. The azo element is selected from at least one of compounds with the following structures: # imgabs0 #, wherein n is 1-10; mechanical interlocking unit with the following structure: # imgabs 1 #

The invention relates to the field of abrasive materials, in particular to an efficient grinding diamond abrasive material and a preparation process thereof.The efficient grinding diamond abrasive material is prepared by coating diamond micro-powder for multiple times to prepare composite diamond micro-powder, then blending the composite diamond micro-powder with electrolytic copper powder, filler, a wetting agent and modified polyvinyl alcohol to obtain slurry, and conducting freezing-unfreezing gel forming to obtain the efficient grinding diamond abrasive material. The prepared diamond grinding material is good in water resistance and efficient in grinding; the preparation method comprises the following steps: depositing a tungsten coating on the surface of diamond micro-powder, then carrying out vacuum high-temperature treatment to obtain pretreated diamond micro-powder with a tungsten carbide layer growing in situ on the surface, generating a silicon oxide layer on the pretreated diamond micro-powder by using tetraethoxysilane, and then generating praseodymium-doped cerium oxide nanoparticles on the surface of the modified diamond micro-powder by using a homogeneous precipitation method; the preparation method comprises the following steps: carrying out chain extension treatment on a prepolymer generated by polytetrahydrofuran ether glycol and 4, 4 '-dicyclohexylmethane diisocyanate by using a silicon-containing chain extender to obtain a polyurethane prepolymer, and then modifying polyvinyl alcohol by using the polyurethane prepolymer and phenolic resin.

The invention relates to the field of fabrics, in particular to a metallic yarn fabric based on a discontinuous aluminum layer and a processing technology thereof.The metallic yarn and polyester fibers are blended to serve as warps, the polyester fibers serve as wefts, the warps and the wefts are interwoven to obtain base cloth, the base cloth is subjected to discontinuous etching in the warp direction through etching liquid, and the pretreated base cloth is obtained; transferring the fabric into antibacterial finishing liquid for padding treatment to prepare the fabric. Modified waterborne polyurethane emulsion containing silicon and nitrogen elements is introduced into finishing liquid, polytetrahydrofuran glycol, hydroxyl-terminated polydimethylsiloxane and isophorone diisocyanate are used as raw materials, 2, 2-bis (hydroxymethyl) propionic acid is used as a hydrophilic chain extender, and cyanuric chloride derivative glycol based on menthol is used as a chain extender; the preparation method comprises the following steps: introducing nano zinc oxide as a finishing agent into a finishing liquid, firstly aminating the nano zinc oxide by using 3-aminopropyltriethoxysilane, then obtaining phytic acid modified nano zinc oxide by using electrostatic and hydrogen-bond interaction, and further grafting cyanuric chloride derivative diol based on menthol.

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

The invention discloses a method for preparing antibacterial and antistatic polyester fibers by regenerating waste polyester, belongs to the technical field of polyester fiber processing, and is used for solving the technical problem that the antistatic performance, moisture absorption performance and antibacterial performance of polyester fibers in the prior art need to be further improved. The method specifically comprises the following steps: crushing waste polyester, performing alcoholysis to prepare an alcoholysis extract, mixing the alcoholysis extract, polytetrahydrofuran ether glycol, 1, 4-butylene glycol and a catalyst under the protection of inert gas, and performing reaction to obtain the polytetrahydrofuran ether glycol / 1, 4-butylene glycol / polytetrahydrofuran ether glycol / 1, 4-butylene glycol / polytetrahydrofuran ether glycol / 1, 4-butylene glycol composite material. According to the invention, the olefin modified silver-loaded montmorillonite and hydroxyethyl methylacrylate reinforced copolyester polyester fiber with a flexible polyether block structure is subjected to padding modification through the reinforcing modifier, so that the breaking strength and the antistatic property of the polyester fiber are effectively improved, and the moisture absorption property and the antibacterial property of the polyester fiber are also improved.

The invention relates to the technical field of plastics, in particular to a high-strength antibacterial plastic packaging bottle and a preparation method thereof.The preparation method comprises the steps that polylactic acid, poly (butylene succinate), epoxidized soybean oil and composite zinc oxide are mixed, extruded, granulated and blow-molded, and a base part is obtained; mesoporous nano-zinc oxide is used as a carrier to carry tea polyphenol, then carboxymethyl chitosan is used for coating, and an epoxy compound containing a Si-O chain segment is grafted; preparing a protective coating from composite zinc oxide and soybean oil-based self-repairing waterborne polyurethane, and coating the surface of a substrate with the protective coating; soybean oil-based polyol, polytetrahydrofuran ether glycol and isophorone diisocyanate are used as raw materials to prepare a polyurethane prepolymer, 2, 2-bis (hydroxymethyl) propionic acid is used as a hydrophilic chain extender, an epoxy compound containing a Si-O chain segment is used as a modifier, 1, 4-butanediol and dithiodiethanol are used as end-capping reagents, triethylamine is used as a neutralizer, and the polyurethane prepolymer is prepared by a one-step method. And ethylene diamine and tetraethylenepentamine are used as amine cross-linking agents to prepare the soybean oil-based self-repairing waterborne polyurethane.

The invention relates to the field of new energy batteries, in particular to a negative electrode current collector and a preparation method thereof, a pole piece and a battery, and the preparation method comprises the following steps: preparing a carbon nanotube with a hydroxyl group on the surface; mixing a carbon nanotube with hydroxyl on the surface, an isocyanate raw material, diol, water and a second organic solvent, and carrying out heating reflux treatment to obtain a third product; mixing the third product, a polytetrahydrofuran raw material, a second organic solvent and a second ammonium salt, and carrying out a polymerization reaction to obtain a precipitate; carrying out drying treatment on the precipitate, so as to obtain foam polyurethane modified by the carbon nano tube; and taking the foam polyurethane modified by the carbon nano tube as a working electrode, carrying out deposition reaction on the working electrode to obtain a base material with a metal layer deposited on the surface, and washing and drying the base material with the metal layer deposited on the surface. The negative electrode current collector lithium metal battery provided by the invention has relatively large energy density, relatively small battery internal resistance, relatively strong cycle performance and relatively low safety risk.

The present invention relates to the field of polyurethane materials and particularly to a temperature-induced color-changing vehicle film and a preparation method therefor. The method of the present invention comprises: firstly, using polyurethane to wrap vanadium dioxide powder to obtain color-changing microcapsules; then using 1,1,1,3,5,5,5-heptamethyltrisiloxane and 3-allyloxy-1,2-propanediol as raw materials to synthesize an organosilicon-modified diol, and enabling trimellitic anhydride to react with toluene diisocyanate to synthesize a dicarboximide compound; enabling the organosilicon-modified diol and the dicarboximide compound to undergo an esterification reaction and a polymerization reaction to obtain an organosilicon-modified imide polyester diol; then mixing the organosilicon-modified imide polyester diol with polytetrahydrofuran ether glycol 2000, and then enabling the mixture to react with toluene diisocyanate to obtain a polyurethane elastomer; and mixing the polyurethane elastomer, the color-changing microcapsules, a silane coupling agent, a plasticizer, an antioxidant, and an ultraviolet light absorber, followed by melt extrusion and blow molding into a film, so as to obtain the temperature-induced color-changing vehicle film.

The invention discloses a preparation method and application of a wear-resistant TPE (thermoplastic elastomer) material for data lines, and the preparation method comprises the following steps: carrying out reaction on polytetrahydrofuran ether glycol and isophorone diisocyanate to form a polyurethane prepolymer, adding a reinforcing monomer and a modified filler, carrying out chain extension reaction, and finally adding ethylenediamine to prepare the wear-resistant TPE material. The TPE material is of a hyperbranched structure, the mechanical performance of the material can be improved, cross-linking points of the TPE material are increased by adding the modified filler, TPE material molecules form a stable grid shape, the wear resistance of the TPE material is further improved, a zinc organic framework is connected between the modified filler and a polyurethane prepolymer molecular chain, and the modified filler contains a six-membered ring structure, so that the wear resistance of the TPE material is improved. According to the present invention, the modified filler is added to the TPE material, such that the TPE material can well adapt to the surface contact when the TPE material is worn so as to reduce the wear, and the dynamic cross-linking of the modified filler and the TPE material molecules does not cause the substantial reduction of the toughness due to the increase of the cross-linking point so as to improve the bending resistance effect of the TPE material.

The invention relates to the technical field of epoxy resin, and discloses polytetrahydrofuran-nanocellulose toughened and reinforced epoxy resin, nanocellulose has a high length-diameter ratio and can play a stress transfer role in an epoxy resin matrix, and a polytetrahydrofuran molecular chain is introduced, so that the polarity of the nanocellulose is improved, and the toughness of the epoxy resin is improved. Compared with the prior art, the nano-crystalline cellulose has the same chain segment as carboxyl-terminated polytetrahydrofuran participating in curing, so that the nano-crystalline cellulose has better compatibility and can form good dispersity in a matrix, and an active carboxylic acid methyl ester group is introduced to a molecular chain of polytetrahydrofuran, so that the molecular chain of polytetrahydrofuran is introduced to the surface of the nano-crystalline cellulose, and the nano-crystalline cellulose is prepared. A polytetrahydrofuran molecular chain contains a flexible chain segment, so that the polytetrahydrofuran has a very good toughening effect, the rigidity of the epoxy resin is reduced, and the epoxy resin has more excellent mechanical properties under the synergistic toughening action of the nanocellulose and the polytetrahydrofuran.

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 preparation method comprises the following steps: adding polytetrahydrofuran ether glycol, polycaprolactone glycol, isocyanate and dibutyltin dilaurate into a flask, respectively inserting a thermometer, a glass plug, a stirring paddle and a nitrogen tube into a flask opening, heating to 80-85 DEG C, reacting for 1-2 hours, adding a charring agent into the flask, reacting for 1.5-2.5 hours, and cooling to room temperature to obtain the flame-retardant washable melt-drop-resistant polyurethane coating. A polyurethane prepolymer is obtained; cooling the polyurethane prepolymer to 45-55 DEG C, adding 2, 2-dimethylolpropionic acid, reacting for 1-2 hours, adding the porous carbon layer modifier and the glucose modifier, reacting for 1-2 hours at 65-70 DEG C, adding triethylamine, and reacting for 1-2 hours; and cooling to normal temperature, adding water, stirring and reacting for 1-2 hours, and adjusting the pH value of the system to 7-8 to obtain the flame-retardant washable melt-drop-resistant water-based polyurethane coating which has good flame-retardant, washable and melt-drop-resistant properties and the like.

The invention relates to the technical field of high polymer materials, and discloses a wear-resistant and anti-slip plastic tray and a manufacturing method thereof. Comprising the following steps: S1, adding polytetrahydrofuran glycol and dihydroxyl-terminated polysiloxane into acetone, uniformly stirring, heating to 65-70 DEG C, adding isophorone diisocyanate and a tin catalyst, and stirring for 2-3 hours to obtain an isocyanato-terminated polyurethane prepolymer; adding a branching agent, reacting for 2-3 hours at the temperature of 60-70 DEG C, adding hydroxyethyl methylacrylate, stirring and reacting until the content of isocyanate groups in the system is not changed any more, and carrying out rotary evaporation to remove the solvent, so as to obtain modified polyurethane acrylate; s2, taking urethane acrylate, a photoinitiator, modified urethane acrylate, modified silicon dioxide and a diluent, and uniformly stirring to obtain a wear-resistant antiskid coating; and S3, the outer surface of the tray base body is coated with the wear-resistant and anti-skid coating, curing is conducted, and the wear-resistant and anti-skid plastic tray is obtained.

The invention discloses a preparation method and application of a reproducible self-healing polyurethane elastomer with synergism of dynamic silicon oxygen bonds and multiple hydrogen bonds. The method comprises the following steps: (1) carrying out a pre-polymerization chain extension reaction on polytetrahydrofuran, isophorone diisocyanate and a catalyst; (2) adding a 3, 13-dihydroxy propyl octaphenyl double-layer silsesquioxane monomer to carry out a chain extension reaction, and then adding carbohydrazide to carry out a reaction; and (3) adding glycerol and camphorsulfonic acid, uniformly stirring, pouring into a mold, curing and drying, thereby obtaining the reproducible self-healing polyurethane elastomer with synergistic dynamic silicon-oxygen bonds and multiple hydrogen bonds. According to the invention, a common fabric is soaked in a dispersion liquid formed by uniformly mixing diluted polyurethane and hydrophobically modified MXene to obtain the multifunctional composite material with the functions of self-cleaning, self-repairing, photo-thermal conversion and human body sensing.

The present invention relates to the technical field of chemical coating materials. The present invention provides an explosion-proof and bullet-proof coating material and a preparation method thereof. The coating material comprises a substrate layer and a composite layer, wherein the composite layer is coated on both sides of the substrate layer, and the composite layer comprises a plurality of elastomer layers, a plurality of modified layers and a plurality of filler layers, and the composite layer is arranged alternately in the order of "modified layer-filler layer-elastomer layer-filler layer" in sequence; the elastomer layer comprises the following materials: isocyanate, polytetramethylene ether polyol and 3,5-diethyltoluenediamine; the modified layer comprises the following materials: epoxy resin and chain extender; compared with the existing polyurea composite coating, the multilayer arrangement of "modified layer-filler layer-elastomer layer-filler layer" is adopted, and the effects and polarities between the functional layers are reasonably utilized to improve the adhesion between the coating materials.

The invention relates to the field of high polymer materials, and discloses a visible light repairing type waterborne polyurethane emulsion and a preparation method thereof.The preparation method comprises the following steps that polytetrahydrofuran, isophorone diisocyanate, 2, 2-dimethylolpropionic acid and butyltin dilaurate are taken and placed in a reactor, pre-polymerization chain extension is conducted at the temperature of 60-90 DEG C, and a polyurethane prepolymer is obtained; the preparation method comprises the following steps: firstly, adding ASB-PEG2000-ASB, carrying out chain extension at 40-60 DEG C, then adding butanediol and carbohydrazide, continuously carrying out chain extension, then adding glucose, carrying out crosslinking at 40-60 DEG C, finally cooling to 25-50 DEG C, adding triethylamine, carrying out stirring to form a salt, adding deionized water, carrying out stirring dispersion, and carrying out emulsification so as to prepare the visible light repairing type waterborne polyurethane emulsion. The water-based polyurethane emulsion has the advantages that the water-based polyurethane emulsion has wide absorption in the visible light wave band, the self-repairing efficiency is high, the water-based polyurethane emulsion and polytetrahydrofuran are simultaneously used as soft segments to be introduced into water-based polyurethane, and the prepared water-based polyurethane emulsion has high mechanical performance and a visible light induced self-repairing function.

The invention relates to the technical field of preparation of functional polymer materials, in particular to organic-inorganic hybrid self-repairing polyurethane and a preparation method thereof, and the organic-inorganic hybrid self-repairing polyurethane comprises the following components in parts by weight: 20-40 parts of polytetrahydrofuran glycol; 10 to 20 parts of modified polytetrahydrofuran glycol; 1-5 parts of a hydrophilic chain extender; 20 to 45 parts of isophorone diisocyanate; 1-10 parts of a chain extender I; 2-10 parts of a chain extender II and the like. An organic-inorganic hybridization method is adopted, a polysiloxane structure is introduced into a polyurethane cross-linked network, a polysiloxane area and polyurethane polyol macromolecules are connected through covalent bonds through interface modification, and phase separation is effectively avoided; besides, a chain extender with polyfunctional groups is adopted to prepare waterborne polyurethane which has a cross-linked structure and contains dynamic covalent bonds and dynamic non-covalent bonds, the hybrid polyurethane material is finally cured to form an organic-inorganic hybrid cross-linked structure, and the organic-inorganic hybrid polyurethane material has the characteristics of high strength and high self-repairing performance; wide application prospects are realized.

The invention discloses a resin binding agent for a resin diamond wire, the resin diamond wire and a preparation method of the resin binding agent, and belongs to the technical field of binding agents for resin diamond wires. Two brand-new modified compounds are designed and synthesized, boron-containing and nitrogen-containing compounds are introduced to form a covalent bond enhanced polyurethane derivative; and the other one is a double-functional-group siloxane oligomer containing an epoxy group and a carboxyl group, which is prepared by carrying out hydrolytic condensation on raw materials such as methyltrimethoxysilane and the like, neutralizing and purifying. The resin binder takes epoxy-phenolic hybrid resin as a main body and is compounded with the two modified compounds, a curing agent, a coupling agent and other components. The resin diamond wire is prepared through wire core pretreatment, glue solution preparation, coating, multi-stage curing and post-treatment. The heat resistance, the bonding strength with diamond and the impact toughness of the bonding agent are remarkably improved, and the bonding agent is suitable for high-precision cutting of hard and brittle materials such as photovoltaic silicon wafers and the like.