35 results about "Isocyanic acid" patented technology

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 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.

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.

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.

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.

The application discloses a blue organic modified dye, a preparation method and application thereof, and belongs to the technical field of dyes and fiber preparation. The structural formula of the blue organic modified dye is. Solvent blue 908 is added into dry tetrahydrofuran, an organic alkali tetrahydrofuran solution and an alkylene oxide tetrahydrofuran solution are added, stirring reaction is carried out, standing is carried out, water is added for filtration, recrystallization is carried out, and the blue organic modified dye is obtained.(a) The blue organic modified dye is dissolved in a solvent A, polyols and isocyanic acid ester are added, a catalyst is added or not, a reaction retarder is added or not, a chain extender is added or not, a blocking agent is added or not, degassing is carried out, filtration is carried out, and a spinning solution is obtained; and(b) the spinning solution is dry spun to form a blue spandex fiber. The dye can solve the problems of difficult late dyeing of the spandex fiber, much wastewater and the like, the dye is combined with the spandex fiber through a chemical bond, and the dye has excellent dry and wet rubbing fastness and excellent migration resistance.

Compositions and methods are disclosed for improving seed quality. For example, treating a stand of seed crops with a seed crop treatment that includes an effective amount of cyanate, thiocyanate, an acceptable salt of cyanate or thiocyanate, an ester of cyanate or thiocyanate, an isocyanate or isothiocyanate, or a combination thereof results in one or more improved seed qualities compared to a control. The improved seed qualities may include, but are not limited to, enhanced seed vigor, increased quantity of saleable seed, increased proportion of saleable seed, increased uniformity of seed shape and size, and desirable bag weight.

The present application relates to the field of polyether material preparation, and provides a low-foam block copolyether and a preparation method thereof, wherein a hydroxyl-terminated polyoxyethylene-polyoxypropylene block copolymer is reacted with propyl triethoxysilane isocyanate, then hydrolysis-condensation is carried out to construct a block copolyether containing siloxane nanoclusters in end groups, and the number average molecular weight of the polyether skeleton, the content of ethylene glycol oxy units, the content of propylene glycol oxy units, the introduction amount of silane groups, the hydrolysis-condensation degree and the average particle size of the siloxane nanoclusters are controlled, so that low initial foam height, low 5min foam height, suitable cloud point and low residue are realized, the problem that it is difficult to balance the long-lasting low foam and low viscosity, wide processing window, structural uniformity and water solubility, and compatibility stability is solved, and the block copolyether has good industrial application value.

This invention belongs to the field of organic polymer material preparation, specifically relating to the one-step synthesis of fluorinated functional ionic polymer materials and their applications. This invention provides a one-step synthesis of fluorinated functional ionic polymer materials, composed of the following raw materials: linker A as a polymer linker arm, functional monomers B and C as functional groups; wherein linker A is a fluorinated dibromide, functional monomer B is 4-aminopyridine or N,N-dimethylethylenediamine, and functional monomer C is 4,4′-methylenebis(phenyl isocyanate) or triphenylmethane triisocyanate. This invention prepares fluorinated functional ionic polymer materials in one step via a simple solvothermal method through a three-component reaction, utilizing changes in functional monomers to regulate the structure and function of the polymer material, achieving efficient removal of PFAS from water.

The present application belongs to the technical field of lithium battery, and particularly relates to a water-based HTPB binder for lithium battery positive electrode and a preparation method thereof. The present application provides a high-molecular polymer composite water-based binder with a core-shell structure based on HTPB water-based technology, which is mainly prepared by acrylation of HTPB with isocyanate propyl, and then emulsion polymerization with sodium methacrylate solution, acrylonitrile, acrylamide and acrylate monomer. The product has no VOC residue, and is an environmentally friendly, non-toxic and pure green water-based binder. Compared with the existing water-based positive electrode binder, the water-based HTPB binder provided by the present application has a toughness increased by more than 2 times, and the peeling force is also increased by more than 1 time. The battery prepared by the water-based HTPB binder provided by the present application has a capacity retention rate of more than 80% after 6000 cycles.

The present application relates to the technical field of printing plate, and particularly relates to a kind of printing plate with fiber reinforced tough flexible resin and its preparation method;For solving the problem of insufficient impact resistance, low bending strength and tensile strength of existing flexible resin for printing plate;The flexible resin is prepared from POSS grafted polyurethane and polyimide grafted aramid fiber, and is synthesized against hydroxybenzoyl amino-POSS, and is polymerized with polyethylene glycol, 2,2-bis (4-isocyanate phenyl) hexafluoropropane and diethylene glycol to obtain POSS grafted polyurethane, POSS can be used as physical crosslinking point, hinder the molecular chain sliding, significantly improve the tensile strength of resin, graft polyimide on the surface of aramid fiber, improve the tensile strength and bending modulus of flexible resin, the stability and durability of the flexible resin in printing production are significantly improved, and the stability and consistency of product quality are ensured.

This isocyanate composition contains: bis(isocyanatomethyl)bicyclo[2.2.1]heptane; a first specific compound having a molecular weight of 199, which is detected separately from bis(isocyanatomethyl)bicyclo[2.2.1]heptane by gas chromatography; and a second specific compound having a molecular weight of 176, which is detected separately from bis(isocyanatomethyl)bicyclo[2.2.1]heptane and the first specific compound by gas chromatography.

This invention belongs to the field of pharmaceutical chemical synthesis technology, specifically relating to a method for preparing high-yield dicyandiamide by urea pyrolysis. The method includes a reaction process using urea and alkaline earth metal oxides as raw materials in a sealed environment, wherein the reaction pressure is 0.1 to 0.3 MPa. Experiments show that by maintaining a positive pressure environment of 0.1 to 0.3 MPa in a dynamically sealed continuous rotary kiln, the volatilization loss of isocyanate (HNCO) is suppressed from a physical process perspective. This reduces the degree of escape of volatile isocyanate (HNCO) during pyrolysis and promotes its further reaction with the solid matrix (alkaline earth metal oxide matrix), thereby improving the raw material utilization rate and dicyandiamide yield. In particular, when the pressure in the dynamically sealed continuous rotary kiln is 0.2 MPa, the yield of the obtained dicyandiamide is 93.5% while maintaining a purity of 99.88%.

This invention relates to the field of coating technology, specifically to an outdoor anti-aging acrylic resin coating and its preparation method. The coating comprises a grafted modified hydroxyl acrylic resin component, butyl acetate, propylene glycol methyl ether acetate, and an aliphatic hexamethylene diisocyanate trimer curing agent. The grafted modified hydroxyl acrylic resin component is prepared by introducing suspended methacrylate double bonds into hydroxyl acrylic resin via 2-isocyanoethyl methacrylate, followed by segmental grafting of hindered amine methacrylate monomers, benzotriazole methacrylate monomers, and methacryloyloxysilane-treated fumed silica. This coating can reduce the migration of light-stabilizing components and the aggregation of nanofillers, improving the gloss retention, color difference stability, chalking grade, haze stability, and flexibility retention of the coating film after outdoor aging. It is suitable for surface protection of wood, rigid PVC profiles, and flexible PVC decorative films.

To address the problem of high negative electrode compaction density and poor cycle life in lithium-ion batteries, this invention provides a non-aqueous electrolyte and a lithium-ion battery. The non-aqueous electrolyte comprises a lithium salt, an organic solvent, and additives. The additives include 1,3-di(isocyanate methyl)cyclohexane and propylene sulfate. The mass percentage of 1,3-di(isocyanate methyl)cyclohexane in the non-aqueous electrolyte is A, and the mass percentage of propylene sulfate is B. A and B satisfy the following relationship: 0.5 ≤ A + B ≤ 3, and 0.1 ≤ A × B ≤ 1. This invention effectively improves the cycle performance and heat resistance of lithium-ion batteries through the compounding of 1,3-di(isocyanate methyl)cyclohexane and propylene sulfate and the optimization of their ratio.

This invention relates to the field of polyether material preparation, and provides a low-foaming block copolymer ether and its preparation method. The method involves reacting a hydroxyl-terminated polyoxyethylene-polyoxypropylene block copolymer with propyltriethoxysilane isocyanate, followed by hydrolysis-condensation to construct a block copolymer ether with siloxane-containing nanoclusters at the end groups. By controlling the number-average molecular weight of the polyether backbone, the content of ethylene glycol oxy units, the content of propylene glycol oxy units, the amount of silane introduced, the degree of hydrolysis-condensation, and the average particle size of the siloxane nanoclusters, low initial foam height, low 5-minute foam height, suitable cloud point, and low residue are achieved. This solves the problem of simultaneously achieving persistent low foaming with low viscosity, a wide processing window, structural uniformity, water solubility, and compatibility stability, and has good industrial application value.

The application discloses a high-temperature-resistant formaldehyde-free plywood flat-pressing adhesive and a preparation method thereof, and belongs to the technical field of adhesive processing, and is used for solving the technical problem that the high-temperature resistance and adhesive strength of the adhesive in the prior art need to be further improved, and specifically comprises the following components in parts by weight: 50 parts of a high-temperature-resistant additive and 50-70 parts of an epoxy resin, wherein the high-temperature-resistant additive is composed of 50g of a high-temperature-resistant elastomer, 7-8g of polyether amine, 1-2g of an auxiliary additive and 50mL of toluene. The application is prepared by combining a polyphthalazine rigid main chain with a fluorine-containing amino polysiloxane flexible chain segment, grafting the fluorine-containing amino polysiloxane on the polyphthalazine rigid skeleton, and further constructing an organic-inorganic hybrid network with isocyanic acid propyl triethoxy silane / nano titanium dioxide, so that the high-temperature aging stability of the material is improved while the high tensile shear strength and high-temperature resistance of the material are improved.

This invention belongs to the field of compound synthesis technology, specifically relating to a diarylguanidine derivative with anti-lymphoma function, its preparation method, and its application. The chemical name of this diarylguanidine derivative is 3-ethyl-5-methyl-(E)-4-(2-chlorophenyl)-6-methyl-2-((2-(2-(3-phenoxyphenyl)-3-phenylguanidinyl)ethoxy)methyl)-1,4-dihydropyridine-3,5-dicarboxylic acid ester. The preparation method includes step 1: reacting phenol and 4-bromonitrobenzene in DMF solution to obtain 4-nitrodiphenyl ether compounds; step 2: placing the 4-nitrodiphenyl ether compounds in an iron-containing ethanol solution to obtain 4-aminodiphenyl ether compounds; step 3: placing the 4-aminodiphenyl ether compounds and phenyl thioisocyanate in tetrahydrofuran solution to react and obtain 1-(4-phenoxyphenyl)-3-phenylurea compounds; and step 4: reacting the 1-(4-phenoxyphenyl)-3-phenylurea compounds with amlodipine under light irradiation to obtain the target compound. The product of this invention is intended for use in the preparation of anti-lymphoma drugs.

The application discloses a kind of hydrophilic rigid gas-permeable contact lens materials and its surface grafting modified preparation method, comprising the following steps: using the monomer containing isocyanate group or epoxy group and the copolymerization of silane monomer and methyl methacrylate to prepare rigid contact lens;The above-mentioned rigid contact lens is immersed into the solution containing hydrophilic macromolecule of hydroxyl or amino, and the covalent reaction of epoxy group and amino or isocyanate group and hydroxyl or amino is carried out at high temperature, and the hydrophilic macromolecule is grafted on the surface of lens;The present application is simple and easy to operate, and the product after grafting is stable, which can significantly improve the hydrophilicity of the lens without affecting the transparency of the lens.

This invention discloses a 1-(2-aminobenzyl)-3-arylurea compound, its preparation method, and its uses. This type of compound is synthesized from o-aminobenzylamine and aryl isocyanate compounds as raw materials, using triethylamine as an acid-binding agent and dichloromethane as a solvent via a condensation reaction in an ice-water bath. The raw materials used in the synthesis of this type of compound are inexpensive and readily available, and the synthesis method is simple. It exhibits good inhibitory effects on crop pathogens, particularly showing significant inhibitory activity against Sclerotinia sclerotinia, Phytophthora blight, Fusarium head blight, Carbendazim, Botrytis cinerea, and Sheath blight.

The present invention relates to a polyisocyanate composition comprising oligomers of 2,5- bis(isocyanatomethyl) tetrahydrofuran, wherein the 2,5-bis(isocyanatomethyl) tetrahydrofuran consists of cis-2,5-bis(isocyanatomethyl) tetrahydrofuran and trans-2,5-bis(isocyanatomethyl) tetrahydrofuran in a weight ratio of 1.0:99.0 to 99.9:0.1.

The present application relates to a kind of high-strength polyurethane heat-conducting adhesive and its preparation method and application, belong to heat-conducting adhesive technical field, to solve the tensile strength, tensile shear strength, thermal conductivity coefficient and breaking elongation of the heat-conducting adhesive in the prior art cannot simultaneously satisfy excellent performance, make the battery module use process easily crack, fall off, battery cell short life and so on one of the problems.The heat-conducting adhesive of the present application adds terminal hydroxyl pre-polymer, terminal hydroxyl pre-polymer combines the advantages of polyol and isocyanate, on the one hand, due to the macromolecular soft segment of polyol, can significantly improve the breaking elongation of heat-conducting adhesive, on the other hand, introduce isocyanate, bring in the hard segment of stronger polarity, make the tensile strength, shear strength of heat-conducting adhesive significantly improve, compared with conventional isocyanate end-capped pre-polymer, it is hydroxyl end-capped, not with moisture reaction, has better storage stability.

This invention relates to a method for preparing 2-amino-5-chloro-N,3-dimethylbenzamide, belonging to the technical field of organic synthesis. The preparation method involves reacting 4-chloro-2-methylaniline as a raw material with methyl isocyanate under the action of a Lewis acid to obtain 2-amino-5-chloro-N,3-dimethylbenzamide; wherein the Lewis acid is one of ZnCl2, AlCl3, BCl3, or FeCl3. In the preparation method of 2-amino-5-chloro-N,3-dimethylbenzamide provided by this invention, the product can be obtained in one step under the catalysis of a specific catalyst. The reaction conditions of this invention are mild, the single-step product yield is high, and it is suitable for industrial production.

The application belongs to the technical field of medical chemistry synthesis, and particularly relates to a method for preparing dicyandiamide by preventing fouling of urea pyrolysis, which comprises a process of reacting raw materials of urea, alkaline earth metal oxide and scale inhibition dopant, wherein the scale inhibition dopant comprises at least one of silicon dioxide and titanium dioxide, and the weight of the scale inhibition dopant accounts for 0.1% to 5% of the weight of the alkaline earth metal oxide. Experiments show that the introduction of the scale inhibition dopant in the reaction system can change the surface tension of the isocyanate melt, help to improve the surface properties and rheological state of the intermediate melt, reduce the adhesion and aggregation of the material on the reactor wall surface, reduce the risk of fouling and plugging, even eliminate the fouling of the reactor wall surface, and improve the stability of continuous production.

The application belongs to the field of polyisocyanate, and particularly relates to a low-viscosity polyisocyanate composition capable of double curing as well as a preparation method and application thereof; the polyisocyanate composition comprises three compounds with structures shown in formula A, formula B and formula C, and the mass proportion of the compounds with structures shown in formula A, formula B and formula C in the total mass of the polyisocyanate composition (100 wt%) satisfies the relationship: 0.05 wt% <= (A+B+C) <= 10 wt%; wherein, R 1 is H or CH3; R 2 is C2-C12 alkyl; R 3 is C5-C6 alkyl; and n is in the range of 2-6. The isocyanate composition product of the application can be double cured, which greatly reduces the viscosity of the composition, improves the stability of the product, and meanwhile, the isocyanate composition has low curing shrinkage rate and good flexibility and hardness, improves the paint adhesion and low-temperature crystallization resistance.

The present application relates to a kind of high-temperature-resistant halogen-free flame-retardant PC / PBT alloy material and preparation method thereof, belong to PC / PBT alloy material manufacturing technical field.PC / PBT alloy material includes: polycarbonate, polybutylene terephthalate, composite functional agent, ester exchange inhibitor and compatibilizer;The composite functional agent is generated by the reaction of amino-containing hybrid POSS and diisocyanate-terminated polydimethylsiloxane under the catalysis of organic tin;The amino-containing hybrid POSS is generated by substitution reaction of octaamino POSS and diphenyl chlorophosphate under the action of alkali.The composite functional agent of the present application is a multifunctional agent that integrates elastomer, composite flame retardant, dispersion carrier and support carrier.The introduction of the composite functional agent into PC / PBT alloy material improves the flame retardancy and water resistance of the alloy material, and improves the dispersibility and processing resistance of inorganic ester exchange inhibitor.

The application provides a multifunctional isocyanate crosslinking modified perovskite solar cell and a preparation method thereof. The application adopts thiophosphoric acid triphenyl isocyanate (TPTI), the isocyanate of which can be subjected to nucleophilic addition with organic cations in PEAI, the triphenyl structure is subjected to strong pi-pi stacking with PEAI, and the isocyanate group is subjected to self-crosslinking under mild conditions to construct a chemical network, in-situ anchor easy migration ions, and realize interface defect passivation. Meanwhile, the P=S bond of TPTI is subjected to charge transfer with PCBM to form steric hindrance to inhibit PCBM self-aggregation, and is subjected to interaction with perovskite components to rebuild a surface termination layer, realizing synergistic passivation and stability. Through chemical bonding and crosslinking network, the application significantly strengthens the stability of the interface and the electron transport layer, effectively improves the photoelectric conversion efficiency and long-term stability of the perovskite solar cell, and solves technical pain points such as unstable cell interface and fast carrier recombination.

This invention discloses a preparation process for a weather-resistant polyurethane coating material, relating to the field of coating material technology. In preparing the weather-resistant polyurethane coating material, sericite is pretreated and then reacted with cinnamaldehyde to obtain modified sericite; a high-efficiency flame retardant is prepared by reacting 3,5-diamino-1,2,4-triazole sequentially with p-methoxybenzaldehyde and dimethyl phosphite using a one-pot method; polytetrahydrofuran diol, benzoyl diols, and 4,4'-dicyclohexylmethane diisocyanate are polymerized to obtain polyurethane; the polyurethane, high-efficiency flame retardant, and modified sericite are mixed using DMF as a solvent to formulate a polyurethane coating, which is then dried to obtain the polyurethane coating material. The polyurethane coating material prepared by the process provided by this invention possesses the advantages of weather resistance, flame retardancy, and antibacterial properties.