286 results about "Dimethylolpropionic acid" patented technology

The invention relates to the field of quantum dot ink, and discloses diffusion plate printing quantum dot ink and a preparation method thereof.The diffusion plate printing quantum dot ink comprises acrylic resin, hyperbranched polyester resin, a quantum dot material, modified boron nitride, a reactive diluent, a photoinitiator, a wetting agent and a defoaming agent; the hyperbranched polyester resin is prepared by reacting hyperbranched polyester acrylate and a sulfydryl-terminated silicon-containing reaction monomer, wherein the hyperbranched polyester acrylate is prepared by reacting pentaerythritol with 2, 2-dimethylolpropionic acid and then carrying out esterification reaction with acrylic acid; the sulfydryl-terminated silicon-containing reaction monomer is prepared by reacting eugenol with 1, 1, 3, 3-tetramethyldisiloxane and then carrying out esterification reaction with 3-mercaptopropionic acid; the modified boron nitride is prepared by modifying a cationic polymer which is prepared by carrying out a Mannich reaction on triethylene tetramine, formaldehyde and acetone and then carrying out a condensation polymerization reaction with formaldehyde. After the ink prepared by the invention is cured, a coating film is high in hardness, adhesive force and heat conductivity coefficient, and good in flexibility, heat resistance and migration barrier property.

The invention relates to the technical field of adhesives, and discloses an antibacterial mildew-proof water-based adhesive and a preparation method thereof. The preparation method of the antibacterial and mildew-proof water-based adhesive comprises the following steps: reacting 2, 2-dimethylolpropionic acid with castor oil to obtain hyperbranched bio-based polyol; modifying the hyperbranched bio-based polyol by using a modifier to obtain modified bio-based polyol; the preparation method comprises the following steps: preparing a waterborne polyurethane dispersion liquid by taking modified bio-based polyol, a hybrid modified BN / MOF composite material and hexamethylene diisocyanate as raw materials and 1, 4-butanediol as a chain extender; the preparation method comprises the following steps: mixing a waterborne polyurethane dispersion liquid, a wetting agent, a defoaming agent, a thickening agent and water to obtain a component A; an aliphatic curing agent is used as a component B; during use, the component A and the component B are mixed and stirred. The antibacterial and mildewproof water-based adhesive disclosed by the invention has excellent adhesion performance, water resistance, self-repairing performance and lasting antibacterial and mildewproof performance.

The invention relates to the technical field of synthetic fibers, in particular to a high-elasticity textile fiber and a preparation process thereof. The high-elasticity textile fiber is prepared from the polyurethane-polyamide elastomer and the modified diatomite master batch through melt spinning, drafting and winding. According to the invention, hydroxyl-terminated polydimethylsiloxane is used as polyol, and the molar ratio of the polyurethane prepolymer to the polyamide prepolymer is controlled, so that the prepared polyamide-polyurethane elastomer slice has good heat resistance; the molar ratio of isocyanate to polyol and the molar mass ratio of caprolactam to adipic acid are controlled, so that the prepared textile fiber is excellent in mechanical property; 2, 2-dimethylolpropionic acid is used for a chain extension reaction, the molar ratio is controlled, the moisture regain of the prepared textile fiber is 8.58%, and the moisture absorption is high; the diatomite is modified by the quaternary ammonium salt compound, and the addition proportion is adjusted, so that the prepared spinning fiber has good antibacterial performance.

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

The invention relates to the field of wear-resistant fabrics, and discloses a high-strength wear-resistant fabric and a preparation method thereof.The high-strength wear-resistant fabric comprises a surface coating and a base cloth layer, the surface coating and the base cloth layer are formed by coating and drying modified waterborne polyurethane emulsion, and the modified waterborne polyurethane emulsion comprises isophorone diisocyanate, ethylene glycol terephthalate, 2, 3, 4-trimethyl-1, 3-pentanediol monoisobutyrate, polyisobutylene glycol monoisobutyrate, according to the present invention, 2, 2-dimethylolpropionic acid, a modified additive, a flame retardant modifier, 1, 4-butanediol, trimethylolpropane and the like are adopted to prepare the modified additive, dopamine is subjected to in-situ auto-polymerization on the surface of a titanium dioxide nanotube, nano-silica is grown on the surface in situ, and modification is performed through a polysiloxane solution to prepare the modified titanium dioxide nanotube flame retardant; the polysiloxane solution is prepared by carrying out a reaction on methyl triethoxysilane and dihydroxyl-terminated polydimethylsiloxane; the flame-retardant modifier is prepared by reacting 2-chloro-4, 6-diamino-1, 3, 5-triazine, 5-hydroxymethylfurfural and phosphorous acid, so that the fabric is endowed with good mechanical properties and wear resistance, and the fabric has a hydrophobic surface and is excellent in flame retardance and durability.

The invention discloses a vegetable oil-based room-temperature water-induced self-healing polyurethane elastomer and a preparation method thereof. The elastomer is prepared by taking polytetramethylene ether glycol and tung oil glycol as soft segments, isophorone diisocyanate as a hard segment, dimethylolpropionic acid as a hydrophilic chain extender and 3-aminophenylboronic acid as an end-capping reagent. Polytetramethylene ether glycol and tung oil glycol are used as soft segments, isophorone diisocyanate is used as a hard segment, dimethylolpropionic acid is used as a hydrophilic chain extender, 3-aminophenylboronic acid is used for blocking, then triethylamine is used for neutralization, and a waterborne polyurethane material with high-density crosslinking sites is synthesized. The material has good mechanical properties and fracture toughness, the tensile strength of the polyurethane film can reach 6.94 MPa, the elongation at break can reach 790.1%, and the film has good rebound resilience.

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 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 relates to a self-crosslinking flame-retardant insulating material and a preparation method thereof, and belongs to the technical field of insulating material preparation. The self-crosslinking flame-retardant insulating material comprises the following raw materials: polyethylene, modified vinyl silane, an epoxy flame retardant, a water producing agent, a catalyst and an initiator, the modified vinyl silane is prepared from a ring-opening reaction product and a diamine compound through a condensation reaction; the ring-opening reaction product is prepared from an epoxy silane coupling agent and a 2, 2-dimethylolpropionic acid derivative through a reaction; the 2, 2-dimethylolpropionic acid derivative is prepared from 2, 2-dimethylolpropionic acid and acrylic acid through esterification reaction; the epoxy flame retardant is prepared from a hydroxyl-terminated dendritic compound and an epoxidation agent through an epoxidation reaction; the hydroxyl-terminated dendritic compound is prepared from hexachlorocyclotriphosphazene and alkyl binary primary alcohol through a substitution reaction. By introducing the modified vinyl silane and the epoxy flame retardant, a bi-crosslinking interpenetrating network is formed in the obtained material, so that the problems in the background technology are solved.

The invention provides waterborne polyurethane resin and a porphyrin-based lithium-sulfur battery electrode binder prepared from the waterborne polyurethane resin, and particularly relates to high-molecular waterborne polyurethane resin with carboxyl in a molecular chain and a preparation method of the high-molecular waterborne polyurethane resin. The preparation method comprises the following steps: carrying out condensation polymerization reaction on 2, 2-dimethylolpropionic acid, N-methyldiethanolamine and diisocyanate which are used as raw materials to prepare an isocyanate-terminated prepolymer solution, and then sequentially carrying out salifying carboxyl neutralization, emulsification and chain extension to prepare the polyurethane prepolymer. The invention discloses a water-based binder for a lithium-sulfur battery electrode, which is prepared by in-situ crosslinking of the water-based polyurethane resin and porphyrin / metalloporphyrin and has electrocatalytic performance, and a preparation method of a sulfur electrode based on the water-based binder for the lithium-sulfur battery electrode. Compared with a commercial electrode binder, the aqueous binder for the lithium-sulfur battery electrode has higher initial discharge capacity, higher capacity retention ratio and lower charge-discharge voltage polarization, and a brand new thought and scheme are provided for developing a high-performance lithium-sulfur battery.

The invention relates to the technical field of preparation of water-based functional polymer materials, in particular to a preparation method of water-based polyurethane slurry for sports shoe leather, which comprises the following steps: mixing polycarbonate diol, core-shell structure graphene oxide-polycaprolactone hybrid nanoparticles and dimethylolpropionic acid, and carrying out vacuum dehydration treatment, isophorone diisocyanate is added for a reaction, and a polyurethane prepolymer is obtained; after the polyurethane prepolymer is cooled, triethylamine is added for a neutralization reaction; under violent stirring, adding a mixture composed of 1, 4-butanediol and a hyperbranched organosilicon amino chain extender serving as a flexible functional core into the neutralized prepolymer to carry out chain extension reaction, and adding deionized water to carry out reversed-phase emulsification, so as to obtain a waterborne polyurethane emulsion; standing and curing the waterborne polyurethane emulsion at a preset temperature to obtain waterborne polyurethane slurry; the finally prepared shoe leather material has excellent wear resistance and excellent low-temperature bending durability.

The invention relates to the technical field of anti-yellowing, in particular to anti-yellowing lining cloth with a hot melt coating and a preparation method of the anti-yellowing lining cloth. Composite carbon dots, an anti-yellowing agent and a composite chitosan solution are adopted to prepare finishing liquid for finishing the lining cloth; the preparation method comprises the following steps: selecting furfural and urea as a carbon source and a nitrogen source, performing one-step hydrothermal synthesis to obtain a nitrogen-doped furfural-based carbon dot, and grafting an amino-terminated polyimidazolium salt antibacterial compound to obtain a composite carbon dot; wherein the amino-terminated polyimidazolium salt antibacterial compound is an amino-terminated halogen-free polyimidazolium salt antibacterial compound which is prepared by taking ethylenediamine, butyric acid, glyoxal and formaldehyde as raw materials based on amine-aldehyde polycondensation and has good biocompatibility; the preparation method comprises the following steps: by taking polybutylene adipate, toluene diisocynate and isophorone diisocyanate as main monomers, polypropylene oxide triol as a crosslinking monomer, 2, 2-dimethylolpropionic acid and 4, 4 '-diaminodiphenyl disulfide as chain extenders and composite carbon dots as an end-capping reagent, adding water and emulsifying to obtain the waterborne polyurethane hot melt adhesive.

The invention belongs to the technical field of high polymer materials, and particularly relates to a PET decorative film and a preparation method thereof. The preparation method comprises the following steps: synthesizing hydroxyl-terminated hyperbranched polyester by taking pentaerythritol and 2, 2-dimethylolpropionic acid as raw materials, and reacting with polyol glycidyl ether to prepare an epoxy-terminated organic modifier; silver-loaded nano silicon dioxide subjected to surface treatment by an amino silane coupling agent is used as inorganic functional particles; pET resin, an organic modifier and inorganic functional particles are subjected to melt blending and extrusion granulation, and modified PET is prepared; the modified PET is prepared into the film through a two-way stretching process. Epoxy groups of the organic modifier chemically react with amino groups at the tail end of a PET molecular chain and on the surfaces of inorganic particles respectively, a stable organic-inorganic hybrid network is constructed, synergistic improvement of reinforcement, toughening and long-acting antibiosis is achieved, and the technical problems that functional particles are not uniform in dispersion, interface bonding is weak, and antibacterial components are prone to migration are effectively solved.

The invention discloses a continuous aramid fiber reinforced epoxy resin composite material and a preparation method thereof, and belongs to the technical field of composite materials. The composite material is obtained by heating and curing continuous aramid fibers modified by a benzoxazine-containing waterborne polyurethane emulsion sizing agent and epoxy resin, the waterborne polyurethane emulsion sizing agent containing benzoxazine is prepared from diisocyanate, long-chain diol, 2, 2-dimethylolpropionic acid, dihydric alcohol containing benzoxazine and triethylamine according to the molar ratio of 1: (0.1 to 0.5): (0.1 to 0.3): (0.3 to 0.4): (0.1 to 0.3) through reaction. The benzoxazine-containing waterborne polyurethane sizing agent is used for modifying the aramid fibers, and benzoxazine is crosslinked with the aramid fibers and the epoxy resin during ring opening polymerization, so that the interface bonding property between the aramid fibers and the epoxy resin can be remarkably improved, and the mechanical property of the composite material can be effectively improved; the application field of the aramid fiber composite material is expanded.

The invention discloses digital direct-injection ink which comprises the following components in percentage by mass: 20%-40% of pigment color paste, 1%-5% of a surfactant, 10%-20% of waterborne polyurethane resin, 3%-10% of polyurethane acrylate dispersion, 5%-15% of fatty alcohol-polyoxyethylene ether, 5%-20% of a humectant and the balance of water, wherein the waterborne polyurethane resin is prepared from the following raw materials in parts by weight: 12 to 20 parts of polyester polyol / polyether polyol, 5 to 10 parts of diisocyanate, 0.5 to 1.5 parts of 2, 2-dimethylolpropionic acid, 0.1 to 1 part of micromolecular polyol, 0.001 to 0.01 part of a catalyst, 15 to 25 parts of acetone, 0.5 to 1 part of a neutralizing agent, 45 to 60 parts of water and 0.3 to 1.5 parts of an amine chain extender. The digital direct-injection ink disclosed by the invention is good in stability, better in washing fastness, relatively uniform in ink particle size, not easy to agglomerate into large particles, better in printing fluency and higher in production efficiency.

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 provides a silicon-based flame-retardant waterborne polyurethane microfiber and a preparation method thereof, and belongs to the technical field of high polymer materials. The preparation method comprises the following steps: hydrolyzing a silicon source under an alkaline condition to obtain silicon dioxide nanospheres, carrying out silane modification on the silicon dioxide nanospheres, and carrying out coupling modification on the silicon dioxide nanospheres by using different phosphorus-containing compounds to obtain the phosphorus-hybridized silicon-based flame retardant. The preparation method comprises the following steps: preparing a silicon-based flame retardant, mixing the silicon-based flame retardant with isophorone diisocyanate, polytetrahydrofuran glycol, dibutyltin dilaurate, dimethylolpropionic acid and the silicon-based flame retardant to obtain a prepolymer, emulsifying the prepolymer in a dispersant to obtain a silicon-based flame retardant / polyurethane emulsion, adding a certain amount of a thickener, an antifoaming agent, a leveling agent, color paste and the like, and uniformly stirring to obtain the silicon-based flame retardant / polyurethane emulsion. And adhering a coating to base cloth, curing and stripping to obtain the silicon-based flame-retardant waterborne polyurethane microfiber. The silicon-based flame-retardant waterborne polyurethane disclosed by the invention achieves excellent mechanical and flame-retardant properties, and also has excellent smoke suppression and low toxicity effects.

The invention discloses self-repairing waterborne polyurethane based on double dynamic bond synergy and a preparation method thereof.The method comprises the following steps that 1, in the nitrogen atmosphere, after isophorone diisocyanate, polytetrahydrofuran diol and dimethylolpropionic acid react for a period of time, a catalyst is added for continuous reaction, and a prepolymer is synthesized; (2) adding N, N-di-tert-butyl ethylenediamine into the prepolymer, and carrying out chain extension reaction; (3) adding dithiothreitol into the solution after the reaction in the step (2) to carry out cross-linking reaction; and (4) adding triethylamine into the solution obtained after the reaction in the step (3), and carrying out a salt forming reaction to obtain the self-repairing waterborne polyurethane emulsion based on double dynamic bond synergy. High self-healing efficiency and mechanical performance are achieved by introducing dynamic covalent bonds with double thermal responses, and reprocessing and recycling are achieved at the same time.

The invention relates to the technical field of adhesives, in particular to a low-temperature-resistant adhesive and a preparation method thereof.The low-temperature-resistant adhesive is characterized in that waterborne polyurethane is selected as base glue, and carboxylated styrene-butadiene emulsion is added to improve the film forming strength, binding power, stability, flowability and film forming property of the adhesive; trimethanol propane poly (oxypropylene) triether is taken as a center, 2, 2-dimethylolpropionic acid is taken as a hydrophilic chain extender, 2-ethoxyl disulfide containing disulfide bonds is added to improve the self-repairing property, and epoxidized fluorine-containing polysiloxane is taken as an end-capping reagent; according to the present invention, the graphene oxide is adopted as the filler, the graphene oxide is subjected to sulfhydrylation by using the beta-mercaptoethanol, and the epoxidized fluorine-containing polysiloxane is grafted by using the sulfydryl-epoxy reaction, such that the low temperature resistance, the ultraviolet resistance, the water resistance and the adhesion property of the adhesive are substantially improved so as to prolong the service life of the adhesive;

The invention relates to the technical field of chemical fiber manufacturing, in particular to a preparation process of graphene reinforced porous hollow polyester fibers. The problems that existing polyester fibers are insufficient in mechanical property and poor in moisture absorption and air permeability are solved. The preparation method comprises the following steps: modifying a PET sheet by using 2, 2-dimethylolpropionic acid and hydroxyl-terminated polydimethylsiloxane to obtain modified PET; the preparation method comprises the following steps: taking chitosan modified graphene as a carrier, and loading metal ions to obtain loaded graphene; polyethylene glycol and sodium bicarbonate are used as pore-foaming agents; modifying octadecyl dimethyl allyl ammonium chloride to obtain an antibacterial toughening agent; all the components are mixed, and the polyester fiber is prepared through melt spinning, stretching, heat treatment and alkali treatment. The mechanical property of the fiber is improved through the introduction of graphene and the modification treatment of the PET sheet; by utilizing the composite pore-foaming agent and adjusting the process, the moisture absorption and air permeability of the fiber are improved, and the service life of the fiber is prolonged.

The invention provides a polyurethane composite material, a preparation method and application thereof and an intelligent fabric liner material, and belongs to the field of solid lubrication. The preparation method comprises the following steps: mixing polypropylene carbonate glycol, isophorone diisocyanate, 2, 2-dimethylolpropionic acid and a catalyst, carrying out a prepolymerization reaction, mixing the obtained prepolymer, 4, 4 '-diaminodiphenyl disulfide and 4, 6-diaminopyrimidine, carrying out a chain extension reaction, mixing the obtained chain extension product with triethylamine, and carrying out a polymerization reaction to obtain polyurethane resin; and mixing polyurethane resin, the isocyanate functionalized boron nitride nanosheets and the carbon quantum dots to obtain the polyurethane composite material. According to the invention, an advanced polyurethane composite material is constructed by innovatively combining self-repairing, wear resistance and damage monitoring functions for the first time, and the properties are realized by a design strategy of combining isocyanate functionalized boron nitride nanosheets and carbon quantum dots with multiple dynamic reversible bonds (disulfide bonds and hydrogen bonds).

The present invention discloses a high- and low-temperature resistant environmentally friendly water-based polyurethane coating and a preparation method thereof, belonging to the technical field of chemical coatings. The preparation method comprises: reacting isophorone diisocyanate with cyanuric acid at 80-90°C to generate a prepolymer containing a triazine ring cross-linked network; adding hyperbranched polycaprolactone to the prepolymer, and vacuum dehydrating the prepolymer to form a mixed prepolymer; using dimethylolpropionic acid to extend the chain and neutralizing it with triethylamine, adding a coating additive and shearing and emulsifying to obtain a high- and low-temperature resistant environmentally friendly water-based polyurethane coating. Through the synergistic effect of the rigid triazine ring network and the hyperbranched chain segments, the coating has both brittle crack resistance and creep resistance over a wide temperature range; the amphiphilic chain extender ensures emulsion stability and low VOC content.

The invention provides a fluorine-silicon composite modified waterborne polyurethane acrylate anti-ultraviolet coating and a preparation method thereof, and belongs to the technical field of waterborne polyurethane preparation. The preparation method comprises the following steps: stirring isophorone diisocyanate, polytetrahydrofuran ether glycol and dimethylolpropionic acid, adding a catalyst, and stirring for reaction to obtain a polyurethane prepolymer; adding a chain extender into the polyurethane prepolymer, and stirring; cooling the reaction system after chain extension, adding an end-capping reagent for stirring reaction, and adding a neutralizer for stirring reaction after the system is cooled; adding low-temperature deionized water into the reaction system, and stirring to emulsify polyurethane to obtain a polyurethane emulsion; acrylic ester, fluorine-containing acrylic ester and silicon-containing acrylic ester are added into the polyurethane emulsion, azobis (isobutylamidine hydrochloride) dissolved in water is slowly and dropwise added after stirring, a heat preservation reaction is conducted, and fluorine-silicon composite modified waterborne polyurethane acrylate emulsion is obtained; and coating and drying the emulsion to obtain the fluorine-silicon composite modified waterborne polyurethane acrylate film.

The invention relates to the technical field of polyurethane materials, in particular to a non-MOCA type fitness equipment rubber coating material and a preparation method thereof. The preparation method comprises the following steps: adding polytetrahydrofuran, isophorone diisocyanate, 1, 4-butanediol, a 2, 2-dimethylolpropionic acid solution, a hydroxyl chain extender, triethylamine, deionized water and a flame-retardant filler to obtain a polyurethane emulsion; and coating the polyurethane emulsion to form a film, and drying to obtain the polyurethane adhesive film. Adding the flame-retardant filler into ethanol, and ultrasonically dispersing uniformly to obtain dispersion liquid; spraying the dispersion liquid onto the surface of a polyurethane adhesive film to obtain a pretreated polyurethane adhesive film; and carrying out layer-by-layer self-assembly on the surface of the pretreated polyurethane adhesive film for 5-6 times to obtain a finished product. The finished product prepared by the invention has excellent flame retardant property, antibacterial property and mechanical property, thereby having wide application prospect in the technical field of polyurethane materials.

The invention discloses flexible polyvinyl alcohol-polyurethane sponge as well as a preparation method and application thereof, relates to the technical field of polyvinyl alcohol sponge, and solves the problem that the mechanical property and the safety performance of the existing polyvinyl alcohol-polyurethane sponge are insufficient. The preparation method comprises the following steps: reacting polyethylene glycol with hexamethylene diisocyanate to obtain an isocyanate-terminated polyurethane prepolymer, further reacting the isocyanate-terminated polyurethane prepolymer with a hydrophilic chain extender dimethylolpropionic acid and hydroxyl-containing acrylate to prepare vinyl-functionalized polyurethane, and preparing a polyurethane aqueous solution; a polyvinyl alcohol aqueous solution and a polyurethane aqueous solution are mixed, and the flexible polyvinyl alcohol-polyurethane sponge is prepared after treatment of the steps of irradiation, freeze drying and the like. The polyvinyl alcohol-polyurethane sponge provided by the invention has a compact three-dimensional cross-linked network structure, is good in flexibility, adjustable in mechanical property and relatively high in water absorption, ensures the application safety of the sponge in the fields of biological medicines, tissue engineering and the like, and meets the development requirements of green materials.

The invention discloses a wear-resistant and stain-resistant leather surface treating agent and a preparation method thereof, and belongs to the technical field of leather treating agents. The leather surface treating agent is prepared from the following raw materials in parts by weight: 70 to 90 parts of modified polyurethane emulsion for leather, 0.4 to 0.6 part of a de-foaming agent, 0.4 to 0.6 part of a flatting agent, 0.8 to 1.2 parts of a wetting agent, 04 to 0.6 part of a thickening agent, 1.2 to 1.8 parts of a coalescing agent and 20 to 40 parts of water, the modified polyurethane emulsion for the leather is prepared by reacting hydroxyl-terminated polyether modified silicone oil, hydroxyl-terminated POSS (Polyhedral Oligomeric Silsesquioxane) modified silicone oil, polytetrahydrofuran ether glycol, dicyclohexylmethane-4, 4 '-diisocyanate, 2, 2-dimethylolpropionic acid, ethyl methacrylate and triethylamine, adding water and dispersing. According to the leather surface treatment agent prepared by the invention, the specific modified polyurethane emulsion for leather is used, so that the wear resistance and the pollution resistance of the leather surface treatment agent are remarkably improved, and lasting protection can be provided for leather products.

The invention discloses a high-elastic material for an anti-slip sole and a preparation method of the high-elastic material in the field of high polymer materials. The high-elastic material is prepared from the following raw materials: modified polyurethane, modified silicone rubber, calcium carbonate, dicumyl peroxide, 2-mercaptobenzothiazole, N-isopropyl-N '-phenyl p-phenylenediamine and naphthenic oil. Wherein the modified polyurethane is prepared by the following steps: carrying out vacuum dehydration on polybutylene adipate, reacting with toluene diisocynate to prepare an isocyanate-terminated prepolymer, adding dimethylolpropionic acid, triethylamine and deionized water to obtain a water-based dispersion, and carrying out graft copolymerization on the water-based dispersion, methyl methacrylate and the like; the preparation method comprises the following steps: preheating modified polyurethane, mixing with modified silicone rubber at a high speed, adding calcium carbonate and naphthenic oil, carrying out double-roller open milling and thin-passing, adding a vulcanizing agent and the like, carrying out overturning milling, and carrying out flat plate vulcanization molding. The material is used for anti-skid soles, and has the advantages of high elasticity, lasting skid resistance and excellent weather resistance.

The invention relates to a formaldehyde-free environment-friendly polyurethane adhesive and a preparation method thereof, relates to the technical field of high polymer materials, and aims to solve the problems of formaldehyde residue, poor water resistance, high process energy consumption, high cost and the like of the existing formaldehyde-free adhesive. According to the invention, dimethylolpropionic acid and wood metal ions form coordinate bonds to strengthen interface bonding, trimethylolpropane constructs a three-dimensional hydrophobic network, and toluene diisocynate isomers are subjected to fractional reaction to optimize crosslinking uniformity. The content of free formaldehyde in the adhesive is not detected, the adhesive strength retention rate is greatly improved after the adhesive is boiled in boiling water for 72 hours, the hot pressing time is shortened to 8 minutes, and the raw material cost is reduced by 40% or above compared with similar products.

The invention provides a biodegradable polyurethane binding material and a preparation method thereof. The biodegradable polyurethane binding material comprises the following raw materials in parts by weight: 50-150 parts of a prepolymer; 40 to 66 parts of tackifying resin; 10 to 30 parts of isocyanate; 7-10 parts of a chain extender; 0.2 to 5 parts of a catalyst; and 0.28 to 0.95 part of an antioxidant. Wherein the prepolymer is prepared by mixing polyethylene glycol, isophorone diisocyanate, polycaprolactone glycol, dimethylolpropionic acid, 1, 4-butanediol, triethylamine and sodium 2-[(2-aminoethyl) amino] ethanesulfonate, and the prepolymer is prepared by mixing polyethylene glycol, isophorone diisocyanate, polycaprolactone glycol, dimethylolpropionic acid, 1, 4-butanediol, triethylamine and sodium 2-[(2-aminoethyl) amino] ethanesulfonate. The weight ratio of the 1, 4-butanediol to the triethylamine to the 2-[(2-aminoethyl) amino] sodium ethanesulfonate is 9: 4: 8: 1: 1: 1; compared with the prior art, the polyurethane adhesive material has the advantages that components with specific contents are adopted, good interaction is realized, and the prepared polyurethane adhesive material can be completely degraded through microorganisms in the natural environment after being cured and is environment-friendly.

The invention relates to a built-in foam material for noise reduction of a new energy automobile tire as well as a preparation method and application of the built-in foam material, and belongs to the technical field of polyurethane foam materials. The foam material is composed of a component A and a component B, wherein the weight percentage ratio of the component A to the component B is 100: (30-70); the component A is prepared from the following components in parts by weight: 100 to 120 parts of polyhydric alcohol I, 50 to 70 parts of polyhydric alcohol II, 20 to 30 parts of polyhydric alcohol III, 0.01 to 0.1 part of catalyst, 15 to 25 parts of chain extender, 20 to 40 parts of foam stabilizer, 5 to 10 parts of liquid nitrile rubber, 1 to 5 parts of high-temperature-resistant epoxy adhesive and 4 to 8 parts of foaming agent; the component B comprises isocyanate; the polyol I comprises polytetramethylene ether glycol, the polyol II comprises polycaprolactone diol, and the polyol III comprises one or more of 2, 2-dimethylolpropionic acid and 2, 2-dimethylolbutyric acid. The foam material has better high temperature resistance, rigidity and toughness, foam cavities are uniform, the overall material density is small, and the mute effect is good.