14 results about "Benzoic anhydride" patented technology

This invention discloses a low-VOCs, low-odor environmentally friendly material for the production of sealing strips for passenger vehicles and its preparation method, belonging to the field of polymer materials technology. The technical solution includes the following raw materials in parts by weight: 100 parts PVC resin; 5 parts stabilizer; 40-60 parts plasticizer; 0.4-0.6 parts lubricant; 1.3-1.5 parts antioxidant; 0.3-0.4 parts ultraviolet absorber; 0.3-0.5 parts deodorizer A; 0.8-1.0 parts deodorizer B; 10-25 parts light active calcium carbonate; 1.0-1.2 parts pigment; deodorizer A is a complex of zinc amino acid, and deodorizer B is benzoic anhydride-intercalated modified aluminum-magnesium hydrotalcite. This invention can capture free, irritating small-molecule alcohols and convert them into esters with milder odors, effectively preventing alcohols from being converted into irritating ethers and ketones during processing, thus reducing the odor and VOCs of passenger vehicle sealing strips.

The invention discloses a preparation method of a bumetanib injection, and belongs to the technical field of medicines. The method comprises the following steps: (1) preparing materials, namely respectively weighing bumetanib, xylitol, sodium dihydrogen phosphate dihydrate, disodium hydrogen phosphate dihydrate and benzoic anhydride modified polyoxyethylated castor oil according to prescription amounts for later use; (2) preparing a solution: weighing water for injection, adding xylitol, sodium dihydrogen phosphate dihydrate and disodium hydrogen phosphate dihydrate according to the prescription dosage in a stirring state, stirring and dissolving, then adding benzoic anhydride modified polyoxyethylated castor oil and bumetanib according to the prescription dosage, and stirring until the materials are completely dissolved; and (3) fixing the volume: supplementing the water for injection to the total amount of the prescription, and uniformly stirring and mixing. According to the bumetanib injection disclosed by the invention, the polyoxyethylated castor oil is modified by benzoic anhydride, so that the dissolution rate of bumetanib is effectively improved, and meanwhile, the high-temperature and illumination stability of the bumetanib injection is remarkably enhanced.

The application discloses a preparation method of a two-dimensional covalent organic framework solid solution and application thereof, and the preparation method comprises the following steps: mixing 2,6-dimethylbenzo[1,2-b:5,4-b']dioxazole, trimesic aldehyde, 1,3,5-tri(4-formylphenyl)benzene and benzoic anhydride, and heating and reacting under vacuum condition to obtain a series of ethenyl-linked covalent organic framework solid solutions. The covalent organic framework solid solution material prepared by the method has a full conjugated structure and high crystallinity, and has good photocatalytic water splitting hydrogen production activity after ball milling treatment.

The invention belongs to the field of polymer preparations, and particularly relates to a benzoic anhydride grafted nylon composite material as well as a preparation method and application thereof, and the benzoic anhydride grafted nylon composite material comprises the following components in parts by mass: 92-97 parts of nylon matrix resin, 3-8 parts of benzoic anhydride, 0.1-0.5 part of an initiator and an auxiliary agent. According to the embodiment of the invention, benzoic anhydride reacts with amino at the tail end of nylon through an anhydride group to form a stable covalent bond, so that the binding force is enhanced; the macromolecular size and the benzene ring structure can improve the strength and the heat resistance of the material, and the pi-pi conjugation effect can induce ordered arrangement of molecular chains, so that the barrier property and the size stability are improved.

The invention discloses an organic-inorganic hybrid early-strength polycarboxylate superplasticizer and a preparation method thereof, and the organic-inorganic hybrid early-strength polycarboxylate superplasticizer comprises the following components: a modified polyether monomer, methyl allyl polyoxyethylene ether, deionized water, a hydrogen peroxide solution, acrylic acid, a reducing agent, a chain transfer agent, a sodium hydroxide solution, modified graphene oxide, modified cellulose and modified fly ash, the invention relates to the technical field of polycarboxylate superplasticizers. Methyl allyl polyoxyethylene ether is modified through benzoic anhydride, so that the adsorption capacity of methyl allyl polyoxyethylene ether on the surfaces of cement particles is enhanced, and compared with unmodified methyl allyl polyoxyethylene ether, modified molecules can be more effectively combined with active sites on the surfaces of the cement particles through new functional groups of the modified molecules, so that the adsorption capacity of the modified molecules on the surfaces of the cement particles is improved. Therefore, a more stable adsorption layer is formed, the polycarboxylic acid water reducer can play a better dispersion role, and cement particles can be kept in a better dispersion state.

The application relates to the technical field of building materials, and discloses an anti-permeation concrete additive, raw materials of which comprise the following components in parts by weight: limestone powder 40-50 parts, sodium silicate 30-40 parts, hexadecyl trimethoxysilane 20-30 parts, silicon dioxide 10-20 parts, and water blocking agent 5-10 parts, wherein the water blocking agent is formed by mixing benzoic anhydride and barium oxide. The anti-permeation concrete additive solves the problem that the anti-permeation concrete additive in the prior art cannot obviously improve the anti-permeation capacity of concrete.

The application discloses sulfonate surfactant for improving pesticide adhesion and application thereof, and belongs to the technical field of surfactants. Modified sodium lignosulfonate is obtained by esterification of sodium lignosulfonate with benzoic anhydride. The esterification reaction reduces the hydrophilicity of the sodium lignosulfonate and improves the hydrophobicity. Then, the surface of the sodium lignosulfonate is coated with titanium dioxide through hydrophobic self-assembly and hydrothermal treatment, so that a porous and rough structure is obtained. The rough structure can improve the anchoring capacity on the leaf surface, and the porous structure can disperse the shear force of rainwater washing and avoid the rainwater washing from falling off the leaf surface. The sulfonic acid group can increase photo-generated carriers, improve the separation efficiency of photo-generated electrons and holes, improve the absorption rate of titanium dioxide to ultraviolet light, and effectively adsorb and combine water molecules due to the strong polarity of the sulfonic acid group, so that in-situ hydrolysis of tetrabutyl titanate on the surface of the porous sodium lignosulfonate nanosphere is promoted, and a titanium dioxide coating layer is formed through condensation.

A method for manufacturing a low-viscosity hardener is provided. The method includes the followings steps: providing a hardener crude product; and subjecting the hardener crude product and an alkaline catalyst to an isomerization reaction, so as to obtain the low-viscosity hardener. The hardener crude product contains 3-methyltetrahydrophthalic anhydride and 4-methyltetrahydrophthalic anhydride, and a weight ratio of the 3-methyltetrahydrophthalic anhydride to the 4-methyltetrahydrophthalic anhydride ranges from 7:3 to 3:7. A viscosity of the low-viscosity hardener ranges from 30 cps to 50 cps.

To provide a polyimide film with excellent retardation (Rth) and laser peelability, and a resin composition for forming the same. [Solution] A resin composition comprising a resin of a structural unit represented by general formula (9), wherein P4 comprises a structural unit derived from 4,4'-(hexafluoroisopropylidene)diphthalic anhydride (6FDA) and 9,9-bis(3,4-dicarboxyphenyl)fluorene dianhydride (BPAF), P3 represents a divalent organic group, and p represents a positive integer. TIFF2026123092000102.tif34151

The invention discloses a sulfonate surfactant for improving pesticide adhesion and application thereof, and belongs to the technical field of surfactants, sodium lignin sulfonate is esterified through benzoic anhydride to obtain modified sodium lignin sulfonate, the hydrophilicity of the sodium lignin sulfonate is reduced through esterification reaction, the hydrophobicity is improved, and the pesticide adhesion is improved. Then titanium dioxide is coated on the surface through a hydrophobic self-assembly effect and hydrothermal treatment to obtain a porous and coarse structure, the coarse structure can improve the anchoring capability on the leaf surface, and the porous structure can disperse the shear force of rain wash to prevent the shear force applied to the leaf surface from falling off by rain wash; the sulfonic acid group can increase photon-generated carriers, improve the separation efficiency of photo-generated electrons and holes and improve the absorption rate of titanium dioxide to ultraviolet light, and the strong polarity of the sulfonic acid group can effectively adsorb and combine water molecules, so that in-situ hydrolysis of tetrabutyl titanate on the surface of the porous sodium lignin sulfonate nanosphere is promoted, and the photocatalytic activity of the porous sodium lignin sulfonate nanosphere is improved. And condensing to form a titanium dioxide coating layer.

To stably reduce the viscosity of a raw material mixed liquid for an epoxy resin used for an electric apparatus in an insulating resin material.SOLUTION: The acid anhydride of the curing agent liquid contains hexahydrophthalic anhydride and 4-methylhexahydrophthalic anhydride, and the weight ratio of 4-methylhexahydrophthalic anhydride is equal to or more than that of hexahydrophthalic anhydride.SELECTED DRAWING: Figure 1

The application belongs to the technical field of polymer materials, and particularly relates to a PP-R cold and hot water pipe and a preparation method thereof. The PP-R cold and hot water pipe provided by the application comprises PP-R resin, composite nucleating agent, impact agent, filler, gamma-aminopropyl triethoxysilane, polyvinyl alcohol, antioxidant and color masterbatch. The reaction product of benzoic anhydride and p-phenylenediamine is reacted with cerium nitrate to generate a diamide carboxylate, which is compounded with calcium pimelate to form a beta nucleating agent, so that the low-temperature plasticity of the PP-R cold and hot water pipe is improved. The low-impact polypropylene is used to wrap modified nano zeolite powder as the impact agent, so that the impact resistance and high-temperature performance of the PP-R cold and hot water pipe are improved. The cooling rate of the PP-R cold and hot water pipe after extrusion molding is controlled, and heat preservation treatment is performed, so that the internal stress of the PP-R cold and hot water pipe is effectively eliminated, and the beta crystal content and crystallization ability are improved. The carbon nanofiber and nano silicon dioxide are selected to jointly form the filler, so that the mechanical properties of the PP-R cold and hot water pipe are improved.

The invention discloses an oxygen reduction reaction catalyst with an axial nitrogen coordination iron monatomic structure and a low-temperature preparation method thereof.The low-temperature preparation method comprises the steps that benzoic anhydride derivatives, iron salt, other non-iron metal salts, a nitrogen source, a carbon source and ammonium salt are added into a mortar and ground and mixed uniformly, and a precursor is obtained; putting the obtained precursor into a muffle furnace, carrying out heat treatment at 140-250 DEG C for 0.5-3 hours, and taking out and cooling after the heat treatment is finished; grinding into powder, washing the powder, and drying in vacuum to obtain the oxygen reduction reaction catalyst with the axial nitrogen coordination iron monatomic structure. The catalyst has excellent ORR performance in an alkaline medium, and the catalytic activity of the catalyst is superior to that of a commercial Pt / C catalyst; and the catalyst has good stability, and is suitable for being used as a catalyst in proton exchange membrane fuel cells and metal-air cells. The catalyst disclosed by the invention is prepared by adopting a low-temperature solid-phase synthesis method, reaction in a protective atmosphere is not needed, and high-temperature heat treatment is also not needed, so that the preparation method is simple, and the energy consumption is remarkably reduced.

The invention provides a synthesis method of tert-butyl peroxybenzoate, and belongs to the technical field of chemical synthesis. The synthesis method of tert-butyl peroxybenzoate provided by the invention comprises the following steps: S1, a tert-butyl hydroperoxide aqueous solution, a catalyst and an active agent are mixed and stirred for a reaction, the catalyst is quaternary ammonium salt or crown ether, and the active agent is a nitrogen-containing heterocyclic compound or triethylamine; s2, cooling a reaction system after the reaction in the step S1, then respectively dropwise adding an organic solvent solution of benzoic anhydride and a sodium hydroxide aqueous solution into the cooled reaction system, and mixing and reacting to obtain a reaction solution; and S3, carrying out filtration, water washing, liquid separation and reduced pressure distillation on the reaction liquid in the step S2 to obtain tert-butyl peroxybenzoate. The synthesis method provided by the invention improves the purity and yield of the tert-butyl peroxybenzoate product.