169 results about "Isocyanic acid" patented technology

The invention discloses a phenolic resin material as well as a preparation method and application thereof in 3D printing, and relates to the technical field of high polymer materials. When the phenolic resin material is prepared, hydroxylated carbon nanotubes react with isocyanate propyl triethoxy silane to prepare pre-modified carbon nanotubes, and then the pre-modified carbon nanotubes react with 2-chloroethyl triethoxy silane to prepare modified carbon nanotubes; the preparation method comprises the following steps: reacting vanillin with 5-amino-1, 2-dihydro-2-methyl-3H-1, 2, 4-triazole-3-thioketone and 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide in sequence, so as to obtain pre-modified vanillin; reacting the pre-modified vanillin with divinyl disulfide to obtain modified vanillin; the modified vanillin, phenol and formaldehyde react to prepare modified phenolic resin, and then the modified phenolic resin reacts with the modified carbon nanotubes to prepare the phenolic resin material. The phenolic resin material prepared by the invention has good flame retardance, heat resistance, aging resistance, self-repairing property and mechanical property.

The invention belongs to the technical field of coatings, and particularly relates to a two-component flexible road marking coating and a preparation method thereof. The two-component flexible road marking coating comprises a component A and a component B in a mass ratio of (2.5-3): 1, wherein the component A comprises 5-10 parts of bisphenol epoxy resin with the epoxy value of 0.4-0.55, 40-50 parts of polymer dihydric alcohol, 0.1-0.3 part of a catalyst, 10-15 parts of pigment, 15-20 parts of filler, 5-10 parts of an anti-skid material, 25-35 parts of internally mixed glass beads, 0.5-1 part of a dispersing agent, 0.5-1 part of a defoaming agent, 3-5 parts of a plasticizer and 30-60 parts of a solvent; the component B is a curing agent composed of modified isocyanate and an isocyanate tripolymer according to the mass ratio of (5-8): 1; the modified isocyanate is a compound which is prepared by carrying out hydrosilylation reaction on unsaturated isocyanate and siloxane with a silicon atom number of 2-4 and a hydrogen-containing terminal, and two ends of the modified isocyanate are isocyanato; the coating has excellent brittle fracture resistance, water resistance and wear resistance at low temperature.

The invention relates to the field of pipes, and discloses a high-strength CPVC pipe and a preparation method thereof.The pipe comprises CPVC resin, modified multi-walled carbon nanotubes, modified nano silicon dioxide and auxiliaries; the modified multi-walled carbon nanotubes are prepared by grafting phosphorus-containing cardanol derivative based benzoxazine and oxidized multi-walled carbon nanotubes; phosphorus-containing cardanol derivative benzoxazine reacts with 1, 5-naphthylenediamine to prepare an aldehyde cardanol intermediate, the aldehyde cardanol intermediate is prepared by reacting paraformaldehyde with hydrogenated cardanol, the obtained cardanol derivative and DOPO are subjected to addition, and then the obtained phosphorus-containing cardanol derivative reacts with paraformaldehyde and 3-aminopropyltriethoxysilane to prepare the flame retardant. The modified nano silicon dioxide is prepared by introducing polyethylene glycol into the surface of isocyanated nano silicon dioxide and grafting with 3, 5-bis (tert-butyl)-4-hydroxybenzene propionyl chloride, and the pipe prepared by the invention is high in tensile strength and impact strength and has good long-acting oxidation resistance, high temperature resistance and flame retardance.

The invention belongs to the technical field of marine corrosion protection, and particularly relates to a multi-metal flushing corrosion inhibitor and a preparation method thereof, benzotriazole and isocyanate propyl triethoxy silane or isocyanate propyl trimethoxy silane are used as raw materials, and a novel benzotriazole corrosion inhibitor containing a silane structure is synthesized through catalysis. The benzotriazole containing the silane structure is compounded with corrosion inhibitors such as organic acid salt, organic acid polymer and organosilane to form the multi-metal flushing corrosion inhibitor for steel, aluminum alloy and copper, which does not contain nitrite, phosphate and heavy metals (lead, cadmium and mercury). When in use, the corrosion inhibitor is diluted to 0.2-0.5%, the corrosion inhibitor is applied to flushing protection of offshore drilling platforms, marine investigation equipment and coastal facilities through flushing and spraying processes, a corrosion inhibitor protective film is formed on the basis of removing a surface salt film, corrosion of multiple metals such as steel, aluminum alloy and copper alloy in a marine atmospheric environment is effectively inhibited, and the corrosion inhibitor has good environmental friendliness.

The application provides a two-component polyurethane sealant suitable for automobile headlight structure bonding and a preparation method thereof, and relates to the technical field of polyurethane sealants. The two-component polyurethane sealant comprises component A and component B, and the mixing mass ratio of the component A and the component B is 1:1 to 1:5. The component A comprises the following raw materials: isocyanate group terminated organic silicon modified polyurethane prepolymer 80-120 parts, powder filler 15-40 parts, and auxiliary agent 0.5-2 parts. The component B comprises the following raw materials: polyol 100-160 parts, powder filler 50-200 parts, catalyst 0.01-0.1 parts, and auxiliary agent 0.1-20 parts. The polyurethane sealant prepared by using single-end double-hydroxyl alkyl polydimethylsiloxane composite polyol for the first time has better water resistance, better bonding force on low surface energy material (PP), better cold and hot impact resistance, better ultraviolet aging resistance, better elongation at break, and better shock resistance.

The application discloses a catalyst for isocyanate borohydration reaction and a preparation and application method thereof. When the catalyst is used for catalyzing the borohydration reaction of isocyanate and borane to synthesize borate, the catalyst has high catalytic activity, mild reaction conditions (the reaction can be carried out at room temperature), short reaction time, high product yield (≥99%), and the reaction is simple, controllable, and simple in post-treatment.

This invention belongs to the field of pharmaceutical chemical synthesis technology, specifically relating to a method for preparing dicyandiamide by urea pyrolysis with anti-scaling properties. The method includes a reaction process using urea, alkaline earth metal oxides, and a scale inhibitor dopant as raw materials. The scale inhibitor dopant includes at least one of silicon dioxide and titanium dioxide, and its weight accounts for 0.1% to 5% of the weight of the alkaline earth metal oxides. Experiments show that introducing a scale inhibitor dopant into the reaction system can alter the surface tension of the isocyanate melt, helping to improve the surface properties and rheological state of the intermediate melt. This reduces material adhesion and aggregation on the reactor wall, lowers the risk of scaling and clogging, and may even eliminate scale buildup on the reactor wall, thereby improving the stability of continuous production.

The invention provides a degradable fiber temporary plugging agent and a preparation method thereof, and belongs to the technical field of oil-gas field development. The temporary plugging agent is composed of polylactic acid-polyurethane block copolymer fibers, and the preparation method of the temporary plugging agent comprises the steps that S1, lactide and an initiator containing dihydroxyl are subjected to ring opening polymerization under the action of a first catalyst, and a hydroxyl-terminated prepolymer is formed; s2, reacting the prepolymer with diisocyanate under the action of a second catalyst to synthesize a polylactic acid-polyurethane block copolymer; s3, preparing fibers through a melt spinning or electrostatic spinning process; the degradation rate and the mechanical property of the fiber can be regulated and controlled by regulating and controlling the initiator type, the diisocyanate type, the isocyanato index R value and the catalyst dosage, so that the fiber is suitable for the wide-temperature-range reservoir conditions of 45-120 DEG C, and the technical problems of contradiction between the strength and the degradability, narrow temperature adaptability, secondary damage to the reservoir and the like of a traditional temporary plugging agent are effectively solved.

The application relates to the technical field of organic synthesis, and discloses a synthesis method of benzthiazuron, which comprises the following steps: step 1, addition reaction of alpha-methyl styrene and hydrogen chloride gas, and degassing to obtain a first reaction liquid; step 2, substitution reaction of the first reaction liquid and cyanate in the presence of a zinc chloride catalyst, and filtration to obtain a second reaction liquid containing isocyanate; and step 3, construction of an inorganic salt aqueous solution system with a density of 1.05-1.10 g / ml and a pH of 9-10, dropwise addition of the second reaction liquid into the system for condensation reaction with o-chlorobenzylamine, and post-treatment and refinement to obtain a target product. The non-phosgene route of chloro-isocyanate substitution is adopted, and the use of the toxic phosgene is completely avoided; the salting-out effect and interface control generated by the specific high-density salt solution effectively inhibit the isocyanate hydrolysis side reaction, and the reaction yield and product purity are obviously improved.

This invention relates to the field of thin-film optics, and particularly to a protective film. To address the problem of light stabilizer precipitation at high concentrations, this invention provides a protective film. The protective film sequentially comprises an anti-glare film, an adhesive layer, and a barrier film; the adhesive layer is formed from an adhesive layer coating liquid; the adhesive layer coating liquid comprises an acrylate copolymer, a light stabilizer, an isocyanate curing agent, and a solvent; the light stabilizer has isocyanate groups. The light stabilizer in the adhesive layer of the protective film will not precipitate or migrate.

The invention discloses a transparent polyurethane elastomer as well as a preparation method and application thereof, and the preparation method comprises the following steps: reacting diisocyanate with polyester polyol under the action of a catalyst to generate an isocyanato-terminated polyurethane prepolymer; and reacting the polyurethane prepolymer with 2, 2 '-dithiobis (acethydrazide) in a first solvent, evaporating the first solvent, and curing to generate the transparent polyurethane elastomer. Through multiple synergistic effects of increasing molecular entanglement, inhibiting hard phase aggregation, promoting supramolecular network crosslinking, a compact hydrogen bond network and a high-hardness hard domain, the polyurethane elastomer has excellent mechanical strength and toughness and has certain self-repairing performance.

This invention relates to a waterproof coating for walls and its preparation method, belonging to the field of coating technology. The waterproof coating of this invention is prepared from the following components: 50-53 parts by weight of epoxy resin, 75-81 parts by weight of curing agent, and 8.5-11.5 parts by weight of waterproof filler. The waterproof filler is prepared by the following steps: reaction of epoxidized nano-silica with the nucleophilic reagent p-aminophenyl POSS, ring-opening and polymerization of N-acid anhydride, and modification with ethyl isocyanate. This invention uses epoxy resin as the film-forming substance and constructs a waterproof system by adding waterproof filler to prepare a waterproof coating suitable for application on walls. It can achieve a relatively ideal waterproof effect without the need for additives, effectively blocking the intrusion of water, and the coating has a low water absorption rate.

The invention discloses a heat-preservation, sound-insulation and moisture-proof composite material and a preparation method thereof, and belongs to the technical field of high polymer materials. The heat-preservation, sound-insulation and moisture-proof composite material is prepared from the following raw materials in parts by weight: 60 to 65 parts of PVC (Polyvinyl Chloride), 15 to 20 parts of SBS (Styrene Butadiene Styrene), 2 to 5 parts of plasticizer, 8 to 12 parts of modified flexibilizer, 1 to 2 parts of anti-aging agent, 2 to 5 parts of modified coupling agent, 8 to 10 parts of ceramic hollow microbeads, 5 to 8 parts of nano silicon dioxide and 5 to 10 parts of flame retardant. The modified toughening agent is prepared by reacting 1, 4-benzene diboronic acid with polyethylene glycol to generate a hyperbranched product; and then reacting with 4, 4 '-methylene bis (phenyl isocyanate) to obtain the product. The prepared heat-preservation, sound-insulation and moisture-proof composite material has excellent impact resistance and heat-preservation, sound-insulation and moisture-proof performance.

The application relates to the field of protective films and discloses a liquid crystal light guide plate high-transmittance tpe protective film and a preparation method thereof, which comprises SEBS, polypropylene, modified halloysite nanotubes, modified silicon dioxide and an additive; the modified halloysite nanotubes are prepared by the following steps: reacting a functional additive, which is prepared by grafting an isocyanate-oxidized antioxidant component and a modified benzothiazole-containing monomer, with 3-chloropropyl trimethoxysilane, and then grafting on the surface of the halloysite nanotubes; the isocyanate-oxidized antioxidant component is obtained by the following steps: reacting 3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid and N-hydroxymethyl acrylamide, and then reacting with 2-mercaptoethanol; and then, the isocyanate-oxidized antioxidant component is reacted with isophorone diisocyanate; the modified benzothiazole-containing monomer is prepared by the following steps: reacting 2-aminobenzothiazole and bromoacetyl bromide, and then reacting with 3,5-dihydroxybenzylamine; and the protective film prepared by the application has good heat-oxygen aging resistance, antibacterial property, heat resistance and tensile property.

The invention belongs to the technical field of catalysts, and discloses a mesoporous high-entropy sulfide (CoMnNiZnFe) S2 catalyst, a preparation method and application in preparation of formic acid through electrooxidation of PET hydrolysate, oleic acid is used as a stabilizer, nitrate and urea are mixed in an ethanol aqueous solution, the urea is gradually decomposed in the hydrothermal reaction process to form isocyanic acid and ammonia for controlling the pH value of the solution, and the pH value of the solution is controlled; the method comprises the following steps: reacting metal salt with isocyanic acid to form an M (OH) 2CO3 nano-plate, reacting the metal salt with CO2 released by the isocyanic acid to form the M (OH) 2CO3 nano-plate, calcining the M (OH) 2CO3 nano-plate in air to form a mesoporous high-entropy oxide, and vulcanizing the mesoporous high-entropy oxide to obtain the mesoporous high-entropy sulfide. The electro-catalysis result shows that excellent formic acid selectivity and cycling stability are shown, waste utilization of PET and efficient production of formic acid are achieved, and the application and development requirements of related fields are met.

The invention relates to a paraffin modified organic silicon pressure-sensitive adhesive with viscosity switching triggered by temperature, and belongs to the technical field of pressure-sensitive adhesives. The preparation method comprises the following steps: by taking high-temperature wax as a core material and melamine-formaldehyde resin and a KH-550 modified nano boron nitride hybrid shell layer as wall materials, obtaining a phase change microcapsule by adopting an in-situ polymerization method, and then grafting Mal-PEG2-COOH to obtain a modified phase change microcapsule; the preparation method comprises the following steps: forming an intermediate from isocyanate propyl triethoxy silane and furfuryl amine, hydrolyzing to modify an organic silicon pressure-sensitive base adhesive, and preparing the organic silicon pressure-sensitive adhesive from the modified organic silicon pressure-sensitive base adhesive and the modified phase-change microcapsules. The DA reaction is performed at normal temperature to form a covalent cross-linked network, so that the pressure-sensitive adhesive is endowed with high-strength adhesive property; during heating, paraffin melting and DA reverse reaction cooperate to reduce viscosity, and viscosity switching triggered by temperature is achieved; and the modified nano boron nitride can accelerate temperature response and enhance the mechanical property of the microcapsule. The organic silicon pressure-sensitive adhesive prepared by the invention has the effect of temperature-triggered viscosity switching.

This invention discloses a halogen-free flame-retardant wear-resistant cable and its preparation method, belonging to the field of cable manufacturing technology. It addresses the technical problem that the wear resistance and flame-retardant properties of existing cables need further improvement. The invention includes the following steps: adding flame-retardant and wear-resistant material to an extruder, extruding it to coat the surface of a shielding layer, and allowing it to cure naturally to obtain a sheath layer. This is achieved by reacting the isocyanate groups on dimethyl diisocyanate with the hydroxyl groups on polyethylene glycol and 5-aminoresorcinol to form a long-chain structure with isocyanate groups at the end. Furthermore, the reaction of the hydroxyl groups on a flame-retardant chain extender with the isocyanate groups at the end forms a spatial chain segment structure. Finally, the composite polyurethane is obtained by end-capping with an inorganic end-capping agent. The composite polyurethane is then used as the main material and mixed with auxiliary materials, extruded and cured to obtain the sheath layer of the wear-resistant cable, ultimately resulting in a high-performance wear-resistant cable.

The invention discloses polymer-based anti-crack concrete and a preparation method thereof, and relates to the technical field of concrete. When the polymer-based anti-crack concrete is prepared, caffeic acid and glycidyl methacrylate react to prepare a chain extender; the preparation method comprises the following steps: reacting isophorone diisocyanate with polyethylene glycol and a chain extender in sequence to prepare polyurethane, and then reacting with mercaptopropyltrimethoxysilane to prepare modified polyurethane; the preparation method comprises the following steps: reacting carboxylated cellulose nanofibers with 4-amino-2, 2, 6, 6-tetramethylpiperidine to prepare pre-modified nanocellulose, and reacting the pre-modified nanocellulose with isocyanate propyl triethoxy silane to prepare modified nanocellulose; uniformly mixing the fine aggregate, the coarse aggregate, cement, fly ash, the modified polyurethane, the modified nano cellulose, water, a water reducing agent and a defoaming agent, pouring into a mold, vibrating, standing, demolding and curing to obtain the polymer-based anti-crack concrete. The polymer-based anti-crack concrete prepared by the preparation method disclosed by the invention has good anti-crack and anti-aging properties.

The invention discloses a dam leakage disposal self-repairing high polymer grouting material and a dam leakage disposal method, and belongs to the technical field of grouting repair, the dam leakage disposal self-repairing high polymer grouting material comprises a component A resin and a component B; the component A is prepared from the following components in parts by mass: 40 to 60 parts of asphalt, 10 to 20 parts of aromatic hydrocarbon oil for environment-friendly rubber, 8 to 20 parts of rosin polyester polyol, 20 to 40 parts of polyphenylmethane polyisocyanate, 0.1 to 1 part of a catalyst and 5 to 15 parts of an auxiliary agent; the component B is a curing agent; the component A resin also comprises 1.5 to 6.5 parts by weight of isocyanate polar groups; the non-cured rubber asphalt waterproof material disclosed by the invention has excellent self-healing property, adhesive property and wet base layer constructability of a non-cured rubber asphalt waterproof material; the adhesive contains isocyanate polar groups, can form chemical linkage with the surfaces of base materials such as sandy soil, concrete, rock soil and the like, and has a better bonding effect.

The invention relates to a sludge / biomass mixed drying process, and belongs to the technical field of sludge treatment. Feeding the dewatered sludge, the biomass, the furfural modified diatomite, the isocyanatopropyltriethoxysilane and the stannous octoate into a double-shaft differential mixer, and uniformly mixing; discharging the mixed material from a discharge port of the double-shaft differential mixer, conveying the mixed material to a corrosion-resistant mesh belt conveyor, and uniformly spreading the material on a mesh belt to form a material layer; a hot air drying system is started, a hot air furnace generates low-temperature hot air, and the low-temperature hot air penetrates through a material layer from bottom to top for drying after being distributed through an air duct; wet and hot waste gas generated by drying firstly enters a condensation dehumidification device to remove moisture, then enters a heat recovery device to recover heat, and finally is discharged after being purified to reach the standard; the furfural modified diatomite is prepared from diatomite, absolute ethyl alcohol, furfural and hydrochloric acid; the moisture content of dried materials is low, and the materials are free of caking, uneven drying and the like.

The application relates to a preparation method of a flame-retardant modified polyisocyanate, and belongs to the technical field of polyurethane elastomers. Nano-composite flame retardants are chemically grafted through the reaction of hydroxyl groups and isocyanate groups in polyisocyanate segments, can be uniformly dispersed in a hydrophilic system, and avoid agglomeration and sedimentation caused by physical mixing. Not only is the dispersibility of the nano-composite flame retardants in polymers improved, but also the interfacial bonding force between the two is improved. 2,2-dimethylol propionic acid is covalently grafted to the polyester side chain of the polyisocyanate through the esterification reaction of hydroxyl groups, pyromellitic anhydride and trimethylolpropane, is converted into a carboxylate after neutralization, and the dispersibility in water is improved. The branched main chain of the comb-shaped polyisocyanate and the side chain polyester unit form a large steric hindrance, further weaken the van der Waals force between molecules, enhance the repulsion between particles, avoid molecular aggregation, and make the flame-retardant modified polyisocyanate form a stable and uniform dispersion liquid in deionized water.

The invention provides an oxygen barrier layer, a preparation method of the oxygen barrier layer and a flexible resin plate with textured flat-top lattice points on the surface, polymer particles are formed by in-situ polymerization of polyurethane resin containing free isocyanate monomers and oxygen barrier resin containing hydroxyl in an organic solvent, and solid filler does not need to be additionally added; the molar content of hydroxyl in the oxygen inhibitor resin is greater than the molar content of isocyanate in the isocyanate monomer, so that the oxygen inhibitor is excessive, and the oxygen inhibitor resin, the polyurethane resin and the flatting agent which do not participate in the reaction jointly participate in film formation. Raw materials of the oxygen barrier layer can be dissolved in a mainstream commercially available flexographic flushing medium, such as an organic solvent containing tetrachloroethylene / n-butyl alcohol or a high-end environment-friendly developing solution containing terpene or commercially available Shanghai sensitive morning, and a photopolymerization reaction does not occur. After exposure, laser ablation and plate washing by a flexible plate washing medium, the flexible resin plate with the flat-top lattice points with the sand meshes on the surface is prepared, and the oxygen barrier layer is completely removed without residues in the plate washing process.

The invention relates to the field of coatings, and discloses a high-temperature-resistant protective coating for an alloy surface and a preparation method of the high-temperature-resistant protective coating. The protective coating is prepared from waterborne epoxy resin, high-temperature-resistant filler, cardanol-based modified benzoxazine resin, a hyperbranched modifier, a curing agent and auxiliaries; according to the cardanol-based modified benzoxazine resin, paraformaldehyde is utilized to introduce an aldehyde group into a hydrogenated cardanol matrix to prepare a cardanol-based aldehyde-containing intermediate, then the cardanol-based aldehyde-containing intermediate reacts with 1, 5-naphthalene diamine, and then the cardanol-based aldehyde-containing intermediate reacts with gamma-aminopropyltriethoxysilane and paraformaldehyde through Mannich reaction to prepare the cardanol-based modified benzoxazine resin. The hyperbranched modifier is prepared by carrying out addition on 2, 4-dihydroxybenzophenone and isocyanatopropyltriethoxysilane, initiating hydrolytic condensation by utilizing a sol-gel method and then introducing triglycidyl isocyanurate to carry out a ring-opening reaction, and the protective coating prepared by the preparation method is strong in adhesive force, high in mechanical strength, good in wear resistance, good in wear resistance, good in wear resistance and good in wear resistance. Meanwhile, good corrosion resistance, high temperature resistance, ultraviolet aging resistance and flame retardance are achieved.

This invention discloses a method for preparing a graphene-functionalized bio-diatomaceous earth memory foam sponge, relating to the field of sponge manufacturing. The method includes: adding 90% diatomaceous earth by weight and 10% by weight of a liquid containing 5% graphene by weight to a ball mill mixer, followed by stirring for 2-3 hours; ball milling the diatomaceous earth and graphene, then calcining them in a rotary kiln; further ball milling the calcined diatomaceous earth-graphene mixture in a ball mill mixer; adding the diatomaceous earth-graphene mixture powder, polyether polyol, and grafted polyether to a mixing tank, and stirring for 30 minutes using a high-speed mixer; adding catalysts A-1 and A-33 and silicone oil, and continuing stirring for 10 minutes; adding butyltin octoate and toluene diisocyanate, stirring at high speed for 5-7 seconds, and then quickly pouring into a foaming box for free foaming to prepare the graphene bio-sponge. This method improves the sponge's naturalness, microporosity, and ability to adsorb and decompose bacteria and harmful gases entering the sponge body.

The application belongs to the technical field of paint coating, and particularly relates to a high-stability UV and moisture dual-curing three-protection paint and a preparation method thereof, which comprises, based on the total amount of raw materials, 25.5-77.9 wt% of 3,3,5-trimethylcyclohexyl acrylate, 20-54 wt% of polyurethane acrylate with an isocyanate group, 1-8.5 wt% of an auxiliary stable crosslinking agent, 0.1-5 wt% of a dehydrating agent, and 1-7 wt% of a photoinitiator; the weight ratio of the polyurethane acrylate to the 3,3,5-trimethylcyclohexyl acrylate and the auxiliary stable crosslinking agent is 1:(1.10-1.40):(0.05-0.30); and the auxiliary stable crosslinking agent is selected from trimethylolpropane triacrylate and / or trimethylolpropane trimethacrylate. The application has the properties of UV and moisture dual curing, and has high stability and can resist acid and alkali environments.

Disclosed is a composition comprising: one or more isocyanate functional prepolymers; one or more catalysts for the reaction of isocyanate moieties and active hydrogen containing moieties; one or more mercapto silanes; one or more amino silanes, isocyanato silanes, or mixtures thereof; one or more reinforcing fillers comprising one or more high surface area carbon blacks; one or more untreated calcium carbonates; one or more polyisocyanates having an isocyanate functionality of about 2 or greater; and one or more linear plasticizers. Preferably, the isocyanate functional prepolymers are prepared in the presence of at least a portion of the linear plasticizers. Preferably, the isocyanate functional polymers are prepared in the presence of a malonic acid dialkyl ester. The composition can be a one-part adhesive composition. Also disclosed is a method of applying the composition to a substrate. The composition bonds to difficult to bond coatings, such as coatings prepared from compositions comprising silanized components such as silanized acryloyl polyols or coatings having silica clusters, without primer.

The invention discloses a foamed thermoplastic polyurethane insole and a preparation method thereof. The raw material composition of the foamed thermoplastic polyurethane shoe insole comprises thermoplastic polyurethane, the raw material composition of the thermoplastic polyurethane contains or does not contain a cross-linking agent, and when the raw material composition of the thermoplastic polyurethane does not contain the cross-linking agent, the raw material composition of the foamed thermoplastic polyurethane shoe insole further comprises the cross-linking agent; the cross-linking agent comprises one or more than two of polyisocyanate, a polyhydroxy compound and a polyamino compound; the polyisocyanate contains at least three isocyanate groups; the polyhydroxy compound contains at least three hydroxyl groups; the polyamino compound contains at least three amino groups. The preparation method can adopt a small blank foaming process. When the cross-linking agent is used for preparing the foamed thermoplastic polyurethane shoe midsole by a small blank foaming process, the shrinkage of a shoe wall during hot pressing can be prevented, and one or more than two properties of tensile strength, elongation at break and layered tearing strength of the foamed thermoplastic polyurethane shoe midsole can be improved.

This invention provides an ether-based electrolyte for improving the high-voltage and long-cycle stability of sodium-ion batteries, its preparation method, and its application. The ether-based electrolyte comprises a base electrolyte and additives; the additives include aromatic isocyanates and alkoxysilanes. The aromatic isocyanates are a combination of one of the following: 6-fluoro-1H-1,3-benzodioxane-8-yl isocyanate, 3,4-dihydro-1,5-benzodioxane-7-isocyanate, or 3,4-(methylenedioxy)phenyl isocyanate, and 4-trifluoromethoxyphenyl isocyanate; the alkoxysilanes are 2-cyanoethyltriethoxysilane or 3,3,3-trifluoropropyltriethoxysilane. The electrolyte of this invention achieves synergistic regulation of interfacial reactions and interfacial film evolution, is suitable for sodium-ion half-cells or full-cells, and can improve overall stability and operating efficiency under high-voltage and long-cycle operating conditions.

This isocyanate composition contains: bis(isocyanatomethyl)bicyclo[2.2.1]heptane; and a specific compound having a molecular weight of 189, which is detected separately from bis(isocyanatomethyl)bicyclo[2.2.1]heptane by gas chromatography.