232 results about "Polytetrahydrofuran" patented technology

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 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 provides bio-based MS base resin, bio-based MS glue and a preparation method of the bio-based MS base resin and the bio-based MS glue, and belongs to the technical field of high polymer materials. The MS base resin is isocyanate group silane terminated bio-based polyether polyol or polyether polyol subjected to chain extension. The polyether polyol is selected from one or more of bio-based polyethylene glycol, bio-based polypropylene glycol, bio-based poly (trimethylene ether glycol) and bio-based polytetrahydrofuran ether glycol. And mixing the bio-based MS base resin, the plasticizer, the filler, the catalyst III, the coupling agent and the auxiliary agent, and stirring under a vacuum condition to obtain the bio-based MS adhesive. The bio-based MS adhesive prepared by the invention is high in bio-based material content, uncomplicated in preparation process and low in energy consumption, and meanwhile, an adhesive body is good in mechanical property, high in stability and good in high temperature resistance and humidity and heat resistance.

The technology of the present disclosure generally relates to the field of power storage devices, and more specifically to a solid electrolyte, an electrode, a solid-state battery, and a method for producing the same. An aspect of the present disclosure relates to a process for producing a solid electrolyte, comprising the steps of: - contacting, in the presence of a catalyst: - a polymer precursor compound comprising polyethylene glycol (PEG) and / or polytetrahydrofuran (PTHF), wherein the polymer precursor compound comprises on average per polymer precursor molecule, -at least 2.0 alkoxysilyl functional groups, with a functionality of at least 2.0, preferably at least 2.5, preferably at least 3.0; and / or -at least 1.0 alkoxysilyl functional groups, with a functionality of at least 3.0; - optionally, an organo-tri-alkoxy silane, an organo-tetra-alkoxy silane, and / or a mixture thereof comprising a metal ion (M+) chelating moiety being a cyanurate, a crown ether, an aza-crown ether, a thia-crown ether, a cryptand, a carbamate, a cyano group, a thiocyanate group, or a metallacrown,, - a metal (M+) salt, preferably does the metal salt comprises Li+, Na+, Mg+, Ca+, Al+, and / or a combination thereof, preferably lithium (Li+); - a solvent, preferably an organic solvent; and, - optionally, an ionically conductive compound; thereby obtaining a solid electrolyte; - optionally, drying the obtained solid electrolyte.

The invention discloses a bio-based modified high polymer material and a preparation method thereof, and relates to the technical field of high polymer materials. When the bio-based modified high polymer material is prepared, firstly, lignin reacts with terephthalaldehyde to prepare formylated lignin; carrying out multi-component reaction on the aldehyde lignin to obtain modified lignin; the preparation method comprises the following steps: reacting 4-mercaptophenylboronic acid with 1-mercaptoglycerol to prepare a dimercaptoborate cross-linking agent; the preparation method comprises the following steps: reacting isophorone diisocyanate with polytetrahydrofuran ether glycol, and then reacting with a flame-retardant chain extender, 1, 2-propylene glycol and hydroxyethyl methylacrylate to prepare modified polyurethane; and mixing the modified polyurethane, the modified lignin and a dimercaptoborate cross-linking agent, casting and curing to obtain the bio-based modified high polymer material. The bio-based modified high polymer material prepared by the invention has the advantages of flame retardance, antibacterial property, aging resistance, self-repairing property, repeatable processing and high mechanical strength.

The invention discloses a preparation method of an antibacterial warm-keeping fabric, and relates to the technical field of textiles. When the antibacterial warm-keeping fabric is prepared, firstly, (E)-butyl-2-ene-1, 4-diamine, glyoxal, formaldehyde and butyric acid are used as raw materials to synthesize a polyimidazolium salt antibacterial agent, then the polyimidazolium salt antibacterial agent is copolymerized with polytetrahydrofuran ether glycol and diphenylmethane diisocyanate to prepare an antibacterial polyurethane spinning solution, and the antibacterial fabric is obtained through wet spinning and weaving. The preparation method comprises the following steps: reacting L-cysteine with 3-amino propyl triethoxy silane to prepare cysteamine acyl propyl triethoxy silane, reacting with formaldehyde and phosphorous acid to obtain flame-retardant modified silane, and further preparing a silicon dioxide solution from the flame-retardant modified silane and sol-gel such as methyltrimethoxysilane; finally, the antibacterial fabric is treated with a benzophenone solution and then soaked with a silicon dioxide solution, and the antibacterial thermal fabric is prepared through ultraviolet irradiation, standing gelation, aging and hexane washing. The prepared fabric has excellent antibacterial property, heat retention property and flame retardant property.

The invention belongs to the technical field of foaming polyurethane, and provides a microsphere foaming polyurethane material, a base plate and a preparation method and application of the base plate, raw materials are prepared from a polyol component and an isocyanate component according to the proportion that the isocyanate index is 1.05-1.15; wherein the polyol component is prepared from the following components in parts by mass: 60 to 65 parts of polytetrahydrofuran polyol, 10 to 15 parts of poly trimethylene ether glycol, 6 to 8 parts of polypropylene oxide polyol A, 6 to 10 parts of polypropylene oxide polyol B, 4 to 6 parts of 1, 4-butanediol, 0.5 to 1.5 parts of trimethylolpropane, 0.3 to 0.5 part of a catalyst, 0.8 to 1.5 parts of a foam stabilizer, 0.5 to 0.7 part of a dispersing agent EFKA-4040 and 0.1 to 0.3 part of polyether modified polysiloxane BYK-333; 0.4 to 0.6 part of expansion microspheres and 0.1 to 0.3 part of water. According to the technical scheme, the problem that a polyurethane material in the prior art cannot have low compression set and excellent fatigue resistance at the same time is solved.

The application discloses a kind of high flame-retardant tpe materials and preparation method thereof, by polytetrahydrofuran, modified monomer and 4,4'-dicyclohexyl methane diisocyanate are reacted, chain extension is used with 1,4-butanediol, finally join flame-retardant additive, form branched structure, and the molecular structure of the pte material is branched structure, and molecular chain segment contains organic silicon composite organic phosphorus structure, when heat decomposition, can generate phosphoric acid, poly-metaphosphoric acid and other acidic substances, these acidic substances will catalyze pte molecule to occur dehydration reaction, accelerate its crosslinking, organic silicon chain segment will produce inorganic silicate or silicon-carbon, and then form a dense carbon layer on the surface of material, can heat insulation and oxygen isolation, prevent combustible gas to escape outward and oxygen diffusion inward, and slow down the further thermal decomposition of internal material, prevent carbon layer from being burnt through or collapse under high temperature, improve the durability of barrier, so that pte material has good flame-retardant effect.

The utility model provides a vacuum collecting device for polytetrahydrofuran production, and relates to the technical field of polytetrahydrofuran production devices. The vacuum collection device for polytetrahydrofuran production comprises an alcoholysis system, a first neutralization system and a second neutralization system which are connected with a discharge tank, a first vacuum assembly is arranged between the alcoholysis system and the discharge tank, and a second vacuum assembly is arranged between the first neutralization system and the discharge tank. A vacuum assembly III is arranged between the neutralization system II and the discharge tank, and the discharge tank is also connected with a nitrogen pipeline. The device can realize continuous discharge of materials without intermittent discharge, reduces workload, saves time and labor, does not affect vacuum of each system, and ensures normal work of each system.

The application provides a preparation method of a polyurethane foaming material. The preparation method comprises the following steps: firstly, pre-polymerization of polytetrahydrofuran ether glycol and hexamethylene diisocyanate; then, mixing, extruding, and granulating of polyhexalactone dihydric alcohol and a catalyst to obtain polyurethane granules. The granules are dried and injection molded into a small embryo to be foamed. The small embryo is immersed in supercritical carbon dioxide, nitrogen is introduced for auxiliary foaming, and gradient pressure relief control is implemented in the foaming process. After foaming, curing treatment is performed to obtain the polyurethane foaming material. The preparation method is beneficial to improving the cell uniformity of the polyurethane foaming material and improving the performance stability of the material after rebound, compression, and aging.

The invention discloses a polyurethane filling adhesive as well as a preparation method and application thereof, and relates to the field of cable materials. The polyurethane filling adhesive comprises hydrophobic polyurethane, an anti-hydrolysis agent, a heat conducting agent and a flame retardant; the hydrophobic polyurethane is formed by polymerizing a soft segment, a hard segment and an amine chain extender, and the soft segment comprises at least one of polytetrahydrofuran ether, dihydroxybutyl-terminated polydimethylsiloxane and aminopropyl terminated polydimethylsiloxane; the anti-hydrolysis agent comprises triisopropanolamine, a carbodiimide anti-hydrolysis agent and an epoxy silane anti-hydrolysis agent. Hydrophobic polyurethane adopts a soft segment containing hydrophobic groups, hydrolysis is inhibited from the source, meanwhile, the hydrolysis resistance is improved in cooperation with the ternary compound hydrolysis-resistant agent, a compact highly-physical cross-linked network is constructed, hydrolysis is inhibited from a chemical structure and a physical barrier community through cooperation of the three components, and long-acting hydrolysis-resistant protection is achieved; and the stability of heat-conducting property and flame-retardant property of the material is maintained in a severe environment in which a high-voltage cable is used.

The invention discloses a self-repairing anti-twisting shielding composite cable, and relates to the technical field of cables, the self-repairing anti-twisting shielding composite cable comprises a conductor, an insulating layer, a shielding layer and an outer sheath which are sequentially sleeved from inside to outside, and the insulating layer and / or the outer sheath are / is obtained by extruding a self-repairing polyurethane elastomer; the self-repairing polyurethane elastomer is prepared from the following components in parts by weight: 100 parts of soft-segment polyol, 40 to 80 parts of isophorone diisocyanate, 12 to 20 parts of a chain extender containing disulfide bonds and 5 to 12 parts of a chain extender containing ureido, and the soft-segment polyol is selected from at least one of polytetrahydrofuran ether glycol and amino-terminated polydimethylsiloxane. The self-repairing anti-twisting shielding composite cable is high in self-repairing capacity, excellent in anti-twisting performance and stable in shielding performance.

The application relates to the technical field of inks, and discloses a long-acting coagulation ink formula, a preparation method and application, the ink comprising a water-based polyurethane emulsion, pigments, a defoaming agent and a dispersing agent; the water-based polyurethane emulsion formula is polytetrahydrofuran glycol, glycerol monooleate, isophorone diisocyanate, a chain extender and a hindered phenol crosslinking agent; the hindered phenol crosslinking agent is prepared and introduced into a molecular chain segment of the water-based polyurethane binder, linear water-based polyurethane macromolecules are linked in the form of chemical bonds, a crosslinked network structure is formed, molecular chain movement is limited, aggregation is not easy, gel during storage can be reduced, and the hindered phenol is linked to the polyurethane molecular chain through chemical bonds, free radicals are captured by the hindered phenol groups, and the phenomenon of ink skinning, gelation and coagulation of the polyurethane ink caused by oxidation during storage and use is avoided; the ink has excellent stability, adhesion, skinning resistance, rubbing resistance and alcohol resistance.

The invention provides organic silicon leather with a Janus structure and a preparation method of the organic silicon leather. The preparation method comprises the following steps: S1, mixing diphenylmethane diisocyanate, polytetrahydrofuran ether glycol and dibutyltin for a first reaction, then adding 4-DOPO-(((3-hydroxypropyl) imino) methyl) phenol into a reaction system for a second reaction, and finally adding 3-perfluorohexyl-2-hydroxypropyl acrylate for terminating, so as to obtain a prepolymer; the polyurethane macromolecules containing fluorine and double bonds at the end are obtained; and S2, coating the surface of base cloth with the polyurethane macromolecule containing fluorine and double bonds at the end to form a bottom coating, then coating the surface of the bottom coating with hydrogen-containing silicone oil, vinyl silicone oil and a platinum catalyst, and carrying out hydrosilylation reaction through thermal induction treatment to form the organic silicon leather. According to the method, the hydrosilylation reaction is triggered through thermal induction, and the PU-PSi composite coating with the Janus structure is formed in situ. According to the method, no organic solvent is needed, the process is environment-friendly, and the obtained organic silicon leather has high bonding strength and excellent wear resistance, flame retardance and hydrophobicity.

The application discloses a kind of encapsulation carrier plate and thermoplastic polyester elastomer material and preparation method, it is related to polymer material technical field.The thermoplastic polyester elastomer material includes following weight parts raw materials: 25-40 parts modified dimethyl terephthalate, 15-25 parts 1, 4-butanediol, 0.07-0.25 parts titanium acid tetraisopropyl ester, 0.25-0.5 parts antioxidant 168, 12-20 parts polytetrahydrofuran ether glycol, 8-15 parts modified 1, 4-butanediol, 1-3 parts isophorone diisocyanate, 5-10 parts basalt fiber, 2-6 parts flake graphite, 2-5 parts tributyl citrate, 1-4 parts methyl phenyl silicone resin, 2-3 parts polyolefin elastomer, 0.2-0.8 parts ultraviolet absorber UV-1577.The thermoplastic polyester elastomer uses modified dimethyl terephthalate and modified 1, 4-butanediol to improve performance, basalt fiber and flake graphite are treated by silanization to enhance compatibility, stepwise temperature control initiation process optimizes grafting uniformity, by double prepolymer melt blending, mechanical properties and stability are considered, the service life is extended by adding antioxidant and ultraviolet absorber.

The invention provides a low-temperature weather-resistant wear-resistant two-component waterborne polyurethane coating material as well as a preparation method and application thereof in PC (polycarbonate) glass, and belongs to the technical field of coating materials. According to the invention, polytetrahydrofuran glycol and polycaprolactone glycol are compounded as a soft segment, a hydroxyl modified waterborne polyurethane dispersion is constructed in combination with a hard segment of isophorone diisocyanate, and a hydrophilic modified hexamethylene diisocyanate tripolymer curing agent is utilized to reduce the reaction activity of isocyanate and water and optimize the structure of the soft segment, so that the hydrophilic modified waterborne polyurethane dispersion is prepared. The dosage of the coalescing agent is synergistically adjusted, so that compact formation of a cross-linked network at low temperature is realized; the composite light stabilizer and a polyurethane system have a synergistic effect, so that the long-term anti-ultraviolet performance is improved; through the wear resistance enhancer, the wear resistance and the adhesive force of the base material are synergistically improved; and the composite light stabilizer is utilized to cooperate with the adhesion promoter, so that the dispersion uniformity is improved, the anti-ultraviolet capability is enhanced, and the hardness and humidity and heat resistance of the paint film are cooperatively improved.

The invention discloses a high-strength sealing material for vehicles as well as a preparation method and application thereof, and belongs to the technical field of high polymer materials. The sealing material is prepared by the following steps: mixing polytetrahydrofuran ether glycol and hydroxyl-terminated polydimethylsiloxane, carrying out vacuum dehydration, cooling, adding diphenylmethane diisocyanate under the protection of nitrogen, adding surface modified nano mica sheets, cellulose nanocrystals and part of a solvent after the reaction is finished, uniformly mixing, and carrying out vacuum drying to obtain the sealing material. Then adding an ultraviolet absorbent, an antioxidant and the residual solvent, and mixing to obtain a functional polyurethane prepolymer mixture; dissolving a chain extender, an organic bismuth catalyst and an accelerant in an ethyl acetate solvent to obtain a curing agent mixed solution; and mixing the functional polyurethane prepolymer mixture with the curing agent mixed solution to obtain the functional polyurethane curing agent. The flexible siloxane chain segment and the modified filler are embedded into the polyurethane matrix, so that the material has excellent hydrophobicity, toughness, mechanical strength and sealing performance.

The application discloses a preparation method of a self-repairing super-hydrophobic composite bio-based polyurethane coating and relates to a polyurethane coating preparation method, which takes Jatropha curcas oil as raw material, takes alcohol as a ring-opening agent, prepares Jatropha curcas-based polyester polyol, and prepares a self-repairing super-hydrophobic composite bio-based polyurethane by using polytetrahydrofuran as a chain extender. The introduction of the synergistic self-repairing function of the double dynamic network structure enhances the mechanical strength and elasticity of the material. The disulfide bond and hydrogen bond in the polyurethane can be dynamically broken and reconnected, so that the damaged area can be self-repaired without external intervention. The introduction of the super-hydrophobic function can effectively resist the adhesion of water and other liquids on the surface of the material, which not only greatly enhances the resistance of the material to the external environment, but also exhibits excellent protective performance in the initial use stage of the material, which is particularly crucial for maintaining the structural integrity and aesthetic appearance of the material. The self-repairing super-hydrophobic ability greatly prolongs the service life of the material and reduces the maintenance cost.

The invention discloses a high-elastic sweat-absorbent polyester yarn and a manufacturing method thereof, and belongs to the technical field of chemical fiber manufacturing, and the method comprises the following steps: preparing three copolyesters with matched intrinsic viscosity, preparing polypropylene glycol-containing hydrophilic copolyesters A and B through step-by-step esterification and copolycondensation, preparing polytetrahydrofuran-containing copolyester C through co-esterification, and preparing the high-elastic sweat-absorbent polyester yarn. And extruding through a multi-channel composite spinneret plate to form a calabash-shaped core layer and a spirally wound surface layer structure. According to the high-elasticity sweat-absorbent polyester yarn and the manufacturing method thereof, the fibers achieve moisture absorption and quick drying through the hydrophilic groups on the surface layer and the porous structure of the core layer, and the fibers and the calabash-shaped core layer cooperatively deform by means of the spiral elasticity design, so that the high-elasticity sweat-absorbent polyester yarn has high resilience and comfort.

The invention relates to the technical field of leather finishing agents, and discloses environment-friendly weather-resistant waterborne polyurethane for leather finishing and a preparation method of the environment-friendly weather-resistant waterborne polyurethane. The preparation method comprises the following steps: adding thiolated modified titanium dioxide into ethyl acetate, adding 4-allyl catechol, 2-methyl-2-acrylic acid-2, 2, 6, 6-tetramethyl-4-piperidyl ester and a photoinitiator, uniformly stirring, irradiating with ultraviolet light, filtering, washing, and drying to obtain a titanium dioxide weather-resistant agent; under the protection of nitrogen, heating polytetrahydrofuran glycol, composite modified montmorillonite and isophorone diisocyanate, adding a catalyst for reaction, adding dimethylolpropionic acid, stirring while keeping the temperature, adding ethylene glycol, and stirring while keeping the temperature to obtain a polyurethane prepolymer; and adding triethylamine, stirring, adding water and a titanium dioxide weather-resistant agent, uniformly dispersing, adding ethidene diamine, and uniformly stirring to obtain the waterborne polyurethane. The prepared waterborne polyurethane has good weather resistance and wear resistance.

The invention relates to a multilayer release film and a preparation method thereof, and relates to the technical field of release film preparation. The preparation method comprises the following steps: dispersing epoxy acrylate, polyethylene glycol diacrylate and hydroxyethyl acrylate in a solvent, adding a composite photoinitiator, carrying out a reaction in a dark place, adding isophorone diisocyanate to obtain first slurry, coating the surface of a base material, and carrying out an illumination reaction to obtain a bottom layer; mixing polyvinyl alcohol and Ti3C2F to obtain a mixed solution, separating to take a solid phase, dispersing the solid phase in a solvent, mixing the solid phase with a polyamide acid solution to obtain second slurry, and coating the surface of the bottom layer to obtain a transition interlayer; dispersing polyurethane acrylate, polytetrahydrofuran acrylate, allyl laurate and 1-hydroxycyclohexyl phenyl ketone in a solvent, adding hydrogenated diphenylmethane diisocyanate to obtain third slurry, and coating the surface of the transition interlayer with the third slurry to form a surface layer to obtain the multi-layer release film. According to the invention, polyvinyl alcohol-Ti3C2F is introduced to form a physical barrier, moisture permeation is hindered, the moisture resistance of the release film in a humid environment is improved, and the damage of water to the structure and performance of the film is reduced.

The invention relates to the technical field of phenolic resin, and discloses high-temperature-resistant phenolic resin and a preparation method thereof.Polytetrahydrofuran ether glycol and diphenylmethane diisocyanate are used for synthesizing a polyurethane prepolymer, a flexible chain segment is introduced, then a phenolic hydroxyl terminated polymer containing cyano groups is prepared through a condensation reaction of magnolol and dichlorobenzonitrile, and the high-temperature-resistant phenolic resin is prepared. Introducing a heat-resistant functional group into the system, and then combining the two prepolymers under the action of a catalyst to form a phenol-based intermediate; and then carrying out polycondensation on the intermediate, phenol and formaldehyde under an acidic condition to generate the cyano-modified phenolic resin. And finally, blending with boron phenolic resin to obtain the high-temperature-resistant phenolic resin. The high-temperature-resistant phenolic resin provided by the invention has better heat resistance and the preparation method thereof.

The invention discloses a low-temperature-resistant anti-corrosion evaporator fin and a preparation method thereof, and relates to the field of fin processing, an evaporator aluminum foil fin is coated with a functional coating, and the functional coating is formed by reacting and curing a coating slurry agent and a curing agent according to the mass ratio of 2: 1. The coating comprises polyaspartic acid ester, polyether amine, amino organic silicon resin and polyether graft modified boron nitride filler. The curing agent is a prepolymer with a branched structure, and the prepolymer is prepared by carrying out co-modification on isophorone diisocyanate and dicyclohexylmethane diisocyanate by adopting trimethylolpropane and polytetrahydrofuran polyol. Through systematic modification and compounding of the curing agent, the filler and the functional resin, the fin still keeps the tensile strength retention rate of 90% or above at low temperature, passes a neutral salt spray test for 900 hours, has excellent low-temperature toughness, wear resistance and long-acting corrosion resistance, and is suitable for a refrigeration equipment evaporator under a low-temperature working condition.

The utility model relates to the technical field of polytetrahydrofuran production, and provides a polytetrahydrofuran vacuum pump drainage system which comprises three groups of vacuum pumps and three groups of gas-liquid separation tanks respectively arranged at the inlet ends of the three groups of vacuum pumps, the gas-liquid separation tank comprises a tank body, the upper part of the tank body is respectively provided with a gas inlet and a gas outlet, and the lower part of the tank body is provided with a liquid outlet; a circle of partition plate is arranged in the tank body in a surrounding mode in the vertical direction, the partition plate divides an inner cavity of the tank body into an outer cavity body and an inner cavity body which are independent, a plurality of through openings communicated with the outer cavity body and the inner cavity body are formed in the partition plate, the air inlet is formed in the outer portion of the outer cavity body, and the air outlet and the liquid outlet are formed in the top and the bottom of the inner cavity body respectively. A plurality of separation plates are further arranged in the inner cavity, the separation plates are connected with the inner sides of the partition plates, and air vents for air circulation are formed in the separation plates; the problem of equipment failure and damage caused by liquid carrying of a vacuum pump due to incomplete liquid drainage can be avoided; the operation stability of the polymerization vacuum pump is improved, and damage to equipment caused by human factors is avoided.

This invention belongs to the field of photocurable materials, specifically relating to a UV-curable material with shape memory and self-healing functions and its manufacturing method. The process involves reacting starch, succinic anhydride, acetic anhydride, and methanesulfonic acid in glacial acetic acid to form acetate starch; reacting epoxidized soybean oil, methanol, and tetrafluoroboric acid to form soybean oil-based polyol; reacting this polyol with tert-butyl acetoacetate to form acetylated soybean oil; reacting this prepolymer with polytetrahydrofuran, diisocyanate, and isobornyl acrylate to form an acetylated soybean oil-based polyurethane photosensitive prepolymer; and finally reacting this prepolymer with acetate starch, a diluent, and a photoinitiator to form a UV-curable material with shape memory and self-healing functions. This invention features high reactivity, mild reaction conditions, high atom utilization, and the material exhibits excellent mechanical, thermal, shape memory, and self-healing properties. It is suitable for applications in adhesives, flexible electronic packaging, and advanced manufacturing.

The application relates to the technical field of electromagnetic shielding, in particular to a flexible electromagnetic shielding material and a preparation method and application thereof. The application provides a flexible electromagnetic shielding material which comprises a Ni-Fe3O4 film and a shape memory polymer film which are stacked in sequence; the Ni-Fe3O4 is prepared by a hydrothermal method; and the shape memory polymer is prepared from polytetrahydrofuran, diphenylmethane-4,4' diisocyanate, poly(dimethylsiloxane), bis(3-aminopropyl) end-capping and 1,4-butanediol. Thanks to the synergistic cooperation of the above-mentioned materials, the flexible electromagnetic shielding material has excellent comprehensive performance, and has excellent shape memory characteristics, flexibility and good electromagnetic shielding capacity, and has high practical application value and popularization prospect.

The invention relates to the field of hydrophobic antifouling engineering wear-resistant materials, in particular to a preparation method of a wear-resistant multifunctional protective organosilicone-modified bi-crosslinked polyurethane (urea) coating, which comprises the following steps: (1) reacting polytetrahydrofuran (PTMEG), castor oil (CO) and isophorone diisocyanate (IPDI), (2) introducing HO-PDMS-OH, and (3) reacting to obtain the wear-resistant multifunctional protective organosilicone-modified bi-crosslinked polyurethane (urea) coating. (3) carrying out a reaction on a polyurethane (urea) prepolymer (PPAE), polyaspartic acid ester and a hexamethylene diisocyanate tripolymer (HDI tripolymer); the prepared coating has excellent wear resistance and multifunctional protective property, and the hydrophobic antifouling property, adhesive force, wear resistance and the like of the polyurethane (urea) coating are improved on the basis of original high strength by introducing HO-PDMS-OH and adopting a double-crosslinking curing strategy.

The embodiment of the invention provides a foaming material, a preparation method thereof and a refrigerating device. The foaming material comprises a component A and a component B. The component A comprises, by weight, 15-18 parts of a foaming agent, 93-97 parts of polyether polyol, 3-7 parts of polytetrahydrofuran ether polyol, 0.8-1.2 parts of a surfactant and 0.6-1 part of a catalyst, and the component B comprises, by weight, 145-151 parts of isocyanate. According to the foaming material provided by the embodiment of the invention, by adding the polytetrahydrofuran ether polyol, the mechanical property of the foaming material can be improved, the foaming material is not prone to cracking and other problems in the using process, so that the heat preservation performance of the refrigerator is kept stable, the adding amount of the foaming agent in the foaming material is low, and the foaming material is suitable for being used in the refrigerator. The production cost of the foaming material can be reduced, and meanwhile the environment-friendly performance of the foaming material is improved.

The utility model discloses treatment equipment based on a polytetrahydrofuran polymerization catalyst, and relates to the technical field of chemical equipment. The treatment equipment based on the polytetrahydrofuran polymerization catalyst comprises a base, a treatment box is fixed above the base, a filter box is placed in the treatment box, a supporting block is fixed to the bottom of the inner wall of the treatment box, the filter box is placed above the supporting block, a filter screen is detachably installed at the bottom of the filter box, and a cover body is installed at the top of the treatment box. The cover body is provided with a rotating assembly used for stirring treatment liquid in the filter box and scraping away accumulations on the filter screen; the design of the filter box in the equipment allows the filter screen to be detachably mounted and is convenient to clean and replace, in addition, through a stirring plate and a scraping plate in the rotating assembly, treatment liquid in the filter box can be stirred, impurities accumulated on the filter screen can be scraped, the filter screen is effectively prevented from being blocked, and the filtering efficiency is improved.

This invention relates to an aqueous one-component thermosetting self-adhesive coating for thin-gauge silicon steel sheets and its preparation method. The aqueous one-component thermosetting self-adhesive coating for thin-gauge silicon steel sheets comprises the following components: modified epoxy resin, modified silica, additives, and deionized water. The modified epoxy resin is obtained by first blending polytetrahydrofuran glycol, sorbitol, and isophorone diisocyanate, and then reacting them with the epoxy resin. The modified silica is obtained by blending silica containing double bonds, isocyanate-modified acrylate monomers containing epoxy groups, and trimethylolpropane triacrylate. The modified epoxy resin of this invention introduces polyurethane and a network structure, which can improve insulation performance, compatibility, and heat resistance. The modified silica of this invention introduces urethane groups, epoxy groups, a network structure, and benzene rings, which can improve compatibility, adhesion, and heat resistance.