25 results about "Oxazolidone" patented technology

The invention provides an epoxy-terminated polyurethane flexibilizer and a preparation method and application thereof, and belongs to the technical field of epoxy composites.The epoxy-terminated polyurethane flexibilizer is prepared from polyol, isocyanate, a chain extender, a catalyst, metal salt and epoxy resin, and the chain extender comprises hydroxybenzoxazine. The epoxy-terminated polyurethane toughening agent provided by the invention contains carbamate groups, benzoxazine groups and five-membered oxazolidinone structures, the groups have strong polarity, and due to the introduction of the five-membered oxazolidinone and the benzoxazine groups, the toughening agent has excellent stability at a high temperature and in a salt mist old chemical process, so that the toughness of the toughening agent is improved, and the service life of the toughening agent is prolonged. The toughening agent is added into the epoxy resin structural adhesive, the adhesion of the epoxy resin structural adhesive to metal materials can be improved while the glass transition temperature is not reduced, and the toughening agent further contains a polyether chain segment which can improve the low-temperature impact resistance of the epoxy resin structural adhesive.

The invention belongs to the technical field of material synthesis catalysis, and particularly relates to a Cu-based defect type metal organic framework, a preparation method thereof and application of the Cu-based defect type metal organic framework in carbon dioxide catalytic conversion. The Cu-based defect type metal organic framework is prepared from triaminoguanidine hydrochloride, a pyrazole ring trinuclear cuprous complex ([Cu3 (PyCA) 3]) and imidazole-2-formaldehyde through a Schiff base condensation polymerization reaction. The Cu-based defect type metal organic framework prepared by the method can efficiently catalyze carbon dioxide and propargyl amine compounds to synthesize oxazolidinone heterocyclic compounds under normal pressure and cocatalyst-free reaction conditions, and has good recycling capability and industrial production potential.

This invention discloses a method for preparing and applying a highly flexible, high-temperature resistant photosensitive resin. The preparation method includes synthesizing an epoxy-containing acrylate resin and a photosensitive resin containing oxazolidinone bonds. A two-step reaction is used to synergistically improve the flexibility and heat resistance of the photosensitive resin: The first step employs RAFT living radical polymerization to precisely control the molecular weight of the acrylate copolymer segments, introducing glycidyl methacrylate to provide side-chain epoxy groups, and adjusting the balance between chain flexibility and rigidity using butyl acrylate and isobornyl ester to obtain a narrowly distributed epoxy-containing acrylate intermediate. The second step utilizes the epoxy group and diphenylmethane diisocyanate to undergo a cyclization addition reaction under a catalyst, generating a highly thermally stable oxazolidinone five-membered heterocyclic structure to impart excellent high-temperature resistance to the resin. The residual isocyanate groups are capped with hydroxy acrylate to introduce photosensitive double bonds, achieving a photosensitive resin with both good adhesion and temperature resistance.

The application discloses a sulfide solid electrolyte, a preparation method thereof and a super capacitor. The sulfide solid electrolyte comprises an organic-inorganic composite film generated by a curing reaction of a raw material system. The raw material system comprises a first monomer, a second monomer, a lithium salt, a siloxane prepolymer and an initiator. The first monomer is N,N'-1,3-propanediyl bis(oxazolidine 2-ketone), and the second monomer is 4,4'-thiobisphenol diglycidyl ether. The application is based on the composite system sulfide solid electrolyte of N,N'-1,3-propanediyl bis(oxazolidine 2-ketone) and 4,4'-thiobisphenol diglycidyl ether, and the modification of the siloxane prepolymer and the optimized process parameters, so that the defects of the prior art can be effectively solved.

This invention provides a waterborne epoxy-isocyanate hybrid nano-heavy-duty anti-corrosion coating and its application method, relating to the field of heavy-duty anti-corrosion coating technology. The waterborne epoxy-isocyanate hybrid nano-heavy-duty anti-corrosion coating provided by this invention includes a primer, which is composed of component A containing epoxy, component B containing isocyanate, and component C containing an aqueous catalyst in a specific ratio. The heavy-duty anti-corrosion coating provided by this invention achieves precise control of the sequential reaction between isocyanate and epoxy groups through the aqueous catalyst, generating in-situ polyurea chains, oxazolidinone five-membered rings, isocyanurate six-membered rings, and amorphous nano-silica particles, forming a highly homogeneous organic-inorganic hybrid copolymer interpenetrating network. The resulting coating possesses both ultra-high mechanical strength and superior chemical resistance and corrosion resistance, is safe and environmentally friendly, and can be widely used for long-term heavy-duty anti-corrosion protection in harsh corrosive environments in fields such as petrochemicals, energy, shipbuilding, marine engineering, infrastructure, and military equipment.

This invention provides poly(hydroxyoxazolidinone) compounds (PHOx) corresponding to formula (I) or formula (II): wherein R1 ’ R2 ’ Each of the following elements independently represents a C1-C20 alkyl group, preferably a C1-C10 alkyl group, more preferably a C1-C3 alkyl group, and most preferably a methyl group; and -R3 and -R4 independently represent hydrogen or a C1-C20 alkyl group, preferably a C1-C10 alkyl group, more preferably a C1-C3 alkyl group, and most preferably a methyl group; and -R5 and -R5 ’ R6, R6 ’ Each of the following groups independently represents hydrogen or a C1-C20 alkyl group, preferably a C1-C10 alkyl group, more preferably a C1-C3 alkyl group, most preferably methyl, or aryl, preferably phenyl; and A is an organic linking group selected from straight-chain, branched, saturated, unsaturated, cyclic and / or acyclic aliphatic, aromatic or arylaliphatic hydrocarbon groups, preferably having 1 to 20, more preferably 1 to 12, most preferably 1 to 8 carbon atoms, and optionally further comprising one or more functional groups selected from ethers, esters, amides, amines, carboxyl groups, sulfur, halogens and / or carbamates; and optionally, A, R3 and R4 in formula (I) are linked to each other to form a cyclic structure; and optionally, R5 and R5 in formula (II) are linked to each other to form a cyclic structure. ’ , and / or R6 and R6 ’ They are interconnected to form a ring structure; and -R7 is a polymer chain selected from polysiloxanes or polyethers; and n is an integer from 2 to 100, preferably from 2 to 50, more preferably from 2 to 25, and most preferably from 2 to 15. The present invention also provides a process for forming the PHOx compound of the present invention and a poly(alkylene oxazolidinone) compound (POx) obtained by dehydrating the PHOx compound of the present invention. (I)(II).

The embodiment of the invention discloses a sulfide solid electrolyte and a preparation method thereof and a supercapacitor, the sulfide solid electrolyte comprises an organic-inorganic composite film generated by a curing reaction of a raw material system, the raw material system comprises a first monomer, a second monomer, a lithium salt, a siloxane prepolymer and an initiator, the first monomer is N, N-dimethylformamide, and the second monomer is N, N-dimethylformamide. The first monomer is N, N '-1, 3-propanediyl bis (oxazolidine-2 ketone), and the second monomer is 4, 4'-thiobisphenol diglycidyl ether. According to the embodiment of the invention, the sulfide solid electrolyte based on a composite system of N, N '-1, 3-propanediyl bis (oxazolidine-2 ketone) and 4, 4'-thiobisphenol diglycidyl ether is combined with the modification effect of the siloxane prepolymer and optimized process parameters, so that the defects in the prior art can be effectively overcome.

The invention provides a novel carrier-free catalysis strategy, the in-situ carboxylation cyclization reaction of ultralow-concentration carbon dioxide and propargylamine is realized by utilizing low-cost silver carbonate under the conditions of normal temperature and normal pressure, and the oxazolidinone compound with important industrial value is efficiently synthesized. The catalytic system not only can efficiently convert carbon dioxide in a low concentration range of 5 vol.% to 35 vol.%, but also can directly convert carbon dioxide as low as 0.04 vol.% in air to generate oxazolidinone, the highest yield can reach 97%, and good substrate applicability is shown. By constructing a circular reaction device, the concentration of carbon dioxide in simulated gas can be reduced from 15 vol.% to 3 vol.%, and meanwhile, the average yield of oxazolidinone is maintained to reach 92%.

The invention relates to the technical field of high polymer materials, and discloses a preparation method and process of a high-temperature-curing and high-temperature-resistant polyurethane sealant, and the preparation method comprises the following steps: preparing an isocyanate-terminated polyurethane prepolymer; carrying out shear mixing on solid epoxy resin micro powder, a liquid separant incompatible with the prepolymer and a thixotropic agent to prepare thixotropic isolation paste; uniformly dispersing the paste in the prepolymer at the temperature lower than the softening point of the micro powder to construct a multi-phase suspension physical isolation system; when in use, the viscosity of the liquid separant is reduced by heating, rheological activation is carried out, the temperature is increased to be higher than the melting point of the micro powder after sizing, the micro powder is subjected to melting phase change to damage the isolation layer, and the micro powder reacts with the prepolymer under the action of the latent catalyst to generate a high-temperature-resistant oxazolidinone structure. By constructing a temperature-sensitive physical isolation structure, the contradiction among the storage stability, high-temperature rapid curing and heat resistance of the single-component polyurethane sealant is effectively solved, and the obtained sealant is good in constructability and high in mechanical strength after curing.

The present disclosure relates to oxazolidone-derived compounds (of formulas I, II, III and IV) and their use as pharmaceutical agent in the treatment, prevention or reduction of both acute and chronic pain. The mode of action disclosed herein allows oxazolidone and oxazolidone analogue compounds to act as analgesic through reduction of hyperactive firing of pain sensing neurons. Related to their high efficacy in the treatment of pain, these compounds are expected to selectively target voltage-activated K+ currents expressed in the small diameter dorsal root neurons (sdDRGns). Such findings, together with those showing that oxazolidone and oxazolidone analogue compounds act as activity dependent blockers also lead to very reduced side-effects. The results disclosed herein show that oxazolidone and oxazolidone analogue compounds described herein are a viable alternative to the already existing pharmaceutical compounds used in the treatment of pain.

The invention discloses a preparation method of L-echinacea A and an acid salt thereof. The preparation method of the L-echinacea A acid salt comprises the following synthetic route. And carrying out alkalization treatment on the L-inclusion canine A acid salt, so as to obtain the L-inclusion canine. According to the invention, pyridinium salt and chiral N-acryloyl oxazolidinone are taken as initial raw materials, a (2R, 5R, 6S) core skeleton of the obtuseline A is selectively constructed through a 1, 3-dipolar cycloaddition reaction, then introduction of all carbon atoms in the obtuseline A is completed through processes of hydrogenation reduction, transamination, hydroboration reduction reaction, methylation and the like, and the novel preparation method of the obtuseline A is realized. The preparation method comprises the following steps: by taking L-echinokimene as a raw material, carrying out protection group replacement, oxidation rearrangement reaction, protection group removal and other processes to prepare L-echinokimene acid salt, and carrying out alkalization treatment on the L-echinokimene acid salt to obtain the L-echinokimene with optical activity, the whole route is simple and convenient, the yield is good, the selectivity is relatively good, and the reaction conditions are mild and controllable.

The application provides a method for synthesizing oxazolidinone compounds based on carbon dioxide and alcohol amine, a catalyst, oxazolidinone compounds prepared based on carbon dioxide and alcohol amine, and application of cerium-based composite oxides in preparation of oxazolidinone compounds based on carbon dioxide and alcohol amine. The method comprises the following steps: taking carbon dioxide and alcohol amine as raw materials, and allowing the alcohol amine to react with the carbon dioxide under the action of a solid catalyst to generate the oxazolidinone compounds; wherein the solid catalyst comprises cerium-based composite oxides, and the reaction process comprises liquid-phase carboxylation and cyclization dehydration. The method provided by the application can easily separate the catalyst from the product, and can make the alcohol amine have a high conversion rate.

This invention provides a method for synthesizing 3-cinnamyl oxazolidine-2-one derivatives. The method provided by this invention is a one-step synthesis of 3-cinnamyl oxazolidine-2-one derivatives. Compared with commonly used methods, it requires only one step to obtain the product and requires less catalyst, thus enabling a more efficient and environmentally friendly method to obtain the corresponding product.

The invention provides a low-viscosity solvent-free epoxy-isocyanate hybrid anticorrosive coating as well as a preparation method and a coating method thereof, and relates to the technical field of industrial coatings. The low-viscosity solvent-free epoxy-isocyanate hybrid anticorrosive paint provided by the invention comprises a primer and a finish, wherein the primer comprises a zinc-rich primer and / or a general primer. Specific catalysts are added into the primer paint and the finish paint, in the curing process, the catalysts preferentially catalyze an epoxy group to react with an isocyanate group to generate an oxazolidinone five-membered ring, then excessive isocyanate is subjected to trimerization to generate an isocyanurate six-membered ring, and therefore a chemical copolymerization interpenetrating network is formed; due to the structure, a paint film is endowed with extremely high crosslinking density, excellent mechanical strength and excellent long-acting corrosion resistance and weather resistance; and the initial viscosity of the coating is as low as 60-70KU, so that the coating is easy to construct and long in construction working life, and is particularly suitable for rapid coating lines in the manufacturing field of original equipment such as containers, engineering machinery, semitrailers and automobiles.

This invention discloses a nano-copper modified metal-organic framework catalyst and its preparation method, comprising: dissolving ligand A (10.4 mg, 0.025 mmol), ligand B (4.5 mg, 0.0125 mmol), and Zn(NO3)2·6H2O (14.8 mg, 0.05 mmol) in a polytetrafluoroethylene hydrothermal reactor by ultrasonication with a solvent; reacting the resulting mixture in an oven at 160°C for 48 hours, followed by slow cooling to room temperature to obtain a zinc metal-organic framework (Zn-MOF); ultrasonically dispersing Zn-MOF (96 mg) in 30 mL of water, and adding 3 mL of Cu(CH3COO)2·H2O (57 mg, 0.2 mmol) aqueous solution; adding hydrazine hydrate (210 mg) to the mixture at room temperature under a nitrogen atmosphere, and reacting at 80°C for 2 hours. After centrifugation, the solid was washed with water and acetonitrile to obtain a copper nanoparticle-modified metal-organic framework catalyst Cu-NPs@Zn-MOF. This material can catalyze the conversion of carbon dioxide to oxazolidinone under mild and green conditions (room temperature, 1 atm CO2, no solvent, no additives) and has high recyclability (10 times).

The application relates to an electrolyte, a lithium ion battery and application thereof. The electrolyte comprises a first additive, a second additive and a third additive, the first additive comprises vinylene carbonate, the second additive comprises 3-(trimethylsilyl)-2-oxazolidinone, and the third additive comprises 1,3,5-triacryloylhexahydro-1,3,5-triazine; the mass percentage of the vinylene carbonate is 1-15% in the total mass of the electrolyte, the mass percentage of the 3-(trimethylsilyl)-2-oxazolidinone is 0.5-5%, and the mass percentage of the 1,3,5-triacryloylhexahydro-1,3,5-triazine is 0.5-2.5%. In the scheme, the three functional additives synergistically act, can effectively inhibit the catalytic side reaction caused by the dissolution of manganese ions, effectively buffer the volume expansion of the silicon negative electrode, and improve the high and low temperature cycle stability of the lithium ion battery.

The present application relates to a kind of 2-oxazolidinone-3-carbamimidate-5-methylene derivatives and preparation method thereof, belong to organic synthesis technical field.The structure of 2-oxazolidinone-3-carbamimidate-5-methylene derivatives provided in the present application is as shown in formula (I)-(III).2-Oxazolidinone-3-carbamimidate-5-methylene derivatives of the present application can be applied to the synthesis and activity screening of novel oxazolidinone antibiotics, can provide technical support for the further derivatization and biological activity research of 2-oxazolidinone-3-carbamimidate derivative compound, with wide application prospect.

The application discloses an electrochemical detection method of 3-amino-2-oxazolidinone (AOZ), and relates to the technical field of electrochemical detection, and comprises the following steps: (1) preparation of conjugated microporous polymer (CMP); (2) preparation of gold nanoparticles (AuNPs); (3) preparation of CMP / AuNPs / SPCE; (4) electrochemical detection of AOZ; and (5) characterization of CMP / AuNPs / SPCE. The electrochemical detection method of 3-amino-2-oxazolidinone is characterized in that gold nanoparticles with a large specific surface area and excellent conductivity and conjugated microporous polymer are drop-coated on the surface of a screen-printed carbon electrode (SPCE) to prepare an electrochemical modified electrode CMP / AuNPs / SPCE for measuring AOZ, and a differential pulse voltammetry method is used to establish an electrochemical detection method for measuring AOZ based on the modified electrode. The method is convenient for batch preparation and low in cost, only needs 30 muL of sample, and can be used for on-site rapid detection of AOZ, a furazolidone metabolite, in animal-derived food.

The invention belongs to the technical field of ultrafiltration membranes, and particularly relates to a modified polyvinylidene fluoride ultrafiltration membrane and a preparation method thereof. The method comprises the following steps: firstly, carrying out alkali activation treatment on PVDF (Polyvinylidene Fluoride), and then carrying out graft copolymerization reaction on the PVDF, vinyl methyl oxazolidinone and a zwitterionic monomer SBVI (Styrene-Butadiene-Vinyl Vinyl Chloride), so as to prepare a graft copolymer PVDF-g-P (VMOX-co-SBVI); and then blending with a PVDF (Polyvinylidene Fluoride) matrix to prepare a membrane casting solution, and carrying out blade coating, phase inversion and drying to obtain the modified ultrafiltration membrane. VMOX provides strong hydrophilicity and is beneficial to formation of a hydration layer and improvement of processing performance; the SBVI has the hydrophilic anti-pollution property of the sulphobetaine and the antibacterial function of the imidazole group at the same time. The two components have a synergistic effect, have good compatibility with PVDF, and can form a stable interpenetrating network in the membrane, so that dual prevention and control of pollutants are realized, and the mechanical property of the membrane is remarkably improved. By adjusting the blending ratio, the hydrophilicity, antibacterial property and mechanical strength of the membrane can be flexibly regulated and controlled, so as to meet different water treatment application requirements.

The application discloses a resin composition, an electrical insulating part prepared from the resin composition and a preparation method of the electrical insulating part. The resin composition for the electrical insulating part of the application is composed of the following components in parts by weight: 70-90 parts of bisphenol A type epoxy resin, 10-30 parts of alicyclic epoxy resin, 45-65 parts of a curing agent, 300-500 parts of a heat-conducting filler and 5-30 parts of a toughening agent OX; the toughening agent OX is a bisphenol A type epoxy resin containing an oxazolidone structure. The special epoxy resin toughening agent containing an oxazolidone structure is added in the formula, the use of the alicyclic epoxy resin is reduced, and a formula with a higher Tg is obtained.

The present invention provides a two-part epoxy resin composition comprising: a main ingredient composition which comprises an epoxy resin (a) having at least one oxazolidone ring structure and an epoxy resin (b) having at least three glycidyl groups and has a viscosity at 120°C of 200 mPa·s or less; and a hardener composition including an aromatic polyamine (d) and having a viscosity at 120°C of 200 mPa·s or less. The two-part epoxy resin composition is characterized by including core / shell rubber particles (g) and in that, when the main ingredient composition is mixed with the hardener composition so that the equivalent ratio (H / E) of the active hydrogen equivalent (H) of the whole hardener to the epoxy equivalent (E) of all the epoxy resins is any value in the range of 0.8-1.2, then the mixture has a minimum viscosity of 200 mPa·s or less at a temperature in the range of 90-120°C.

The invention discloses a substituted benzimino thioxazolidinone derivative as shown in a formula (I) or an isotope labeled compound thereof, or an optical isomer, a geometric isomer, a tautomer or an isomer mixture thereof, or a pesticide pharmacologically acceptable salt thereof, and application of the compound in preparation of a pesticide for pest prevention and control, and particularly discloses a substituted benzimino thioxazolidinone derivative or an isotope labeled compound thereof, or an optical isomer, a geometric isomer, a tautomer or an isomer mixture thereof. The compound can achieve a better pest control effect at a lower dosage, and especially can be used for controlling pests such as tetranychidae, microcosaridae, acaridae, tarsonemidae, aleuridae and root-knot nematode and can be used for controlling pests such as tetranychidae, microcosaridae, gall mite, tarsonemidae and the like.

Proposed is a copolymer including an acrylate-based monomer unit containing a straight-chain or branched-chain aliphatic hydrocarbon having 5 to 22 carbon atoms, one or more monomer units selected from the group consisting of an acrylate-based monomer unit containing one or more substituted or unsubstituted aromatic or aliphatic rings and a vinyl-based monomer unit containing one or more substituted or unsubstituted aromatic or aliphatic rings, and a polar monomer unit containing one or more functional groups selected from the group consisting of carboxylic acid (COOH), sulfonic acid (SO3H), phosphonic acid (PO3H2), cyano (CN), pyrrolidone (NC4H6O), amide, alkyl amide, dialkyl amide, alcohol, an epoxy group, caprolactam (C5H10CNO), morpholine (C4H8NO), and oxazolidone (C3H4NO2). In addition, proposed are a dispersion prepared using the copolymer, a positive electrode for a secondary battery manufactured using the dispersion, and a secondary battery including the positive electrode.

This invention discloses a copper-based nitrogen-rich organic polymer catalytic material, its preparation method, and its applications. The catalytic material uses the nitrogen-rich organic polymer TPT-Trz-POP as a support, on which a copper active component is loaded. TPT-Trz-POP is prepared by a Schiff base condensation reaction of 2,4,6-tris(4-formylphenoxy)-1,3,5-triazine and 3,5-diamino-1,2,4-triazole. The preparation method includes polymer synthesis, copper source loading, and reduction steps. This invention utilizes density functional theory (DFT) calculations to drive the screening of dominant monomers, constructing a catalytic material that combines high-density active centers with good structural stability. Under mild conditions, this material can directly and efficiently convert low-concentration CO2 (5 vol.%) into oxazolidinone compounds with a yield as high as 90%, and exhibits excellent cycling stability and impurity tolerance. The material, method, and applications provided by this invention offer a feasible technical solution for the in-situ, efficient resource-based conversion of low-concentration CO2.

A non-aqueous electrolyte includes a lithium salt, an organic solvent, and an additive. The additive includes a compound having a cyclic borate-based substituent and an oxazolidone-based matrix substituted with a fused ring, so that a lithium secondary battery applying the same has improved high-temperature cycle characteristics and high-temperature storage characteristics, thereby improving overall performance.