15 results about "Phthalic acid anhydride" patented technology

This invention relates to a taraxasterol nitrobenzoate derivative in the field of medicinal chemistry, with the following structural formula: Compound B is obtained by reacting taraxasterol 1 with 4-nitrophthalic anhydride in a suitable alkaline catalyst and organic solvent. This synthetic route offers high yield and is easy to implement. Activity tests demonstrate that the taraxasterol nitrobenzoate derivative shown as B, designed and synthesized in this invention, is a suitable antitumor drug candidate, particularly as a candidate drug for lung cancer.

This application discloses a solid electrolyte separator based on esterified cellulose and its preparation method, specifically including the following steps: first, esterified cellulose derivatives are obtained by modifying cellulose acetate as a base with 4-methylphthalic anhydride; then, the esterified cellulose derivative is dissolved in N,N-dimethylformamide with lithium bis(trifluoromethanesulfonylimide) and succinate, mixed evenly, coated onto a mold, and vacuum dried to obtain the separator. This separator exhibits good mechanical properties and interfacial stability, effectively suppressing lithium dendrite growth and improving battery safety. Lithium metal batteries assembled using this separator demonstrate high discharge specific capacity and good cycle stability, making them suitable for high-energy-density solid-state lithium batteries.

This application relates to the field of medicinal chemistry, specifically disclosing an antitumor molecular gel compound and its preparation method. It is prepared from the following raw materials: phthalic anhydride or its substituted derivative, a 2-amino-6-substituted benzothiazole derivative, a condensing agent, an organic base, and a polar aprotic solvent. The preparation method is as follows: S1, dissolving the 2-amino-6-substituted benzothiazole derivative and the organic base in a solvent; S2, dissolving the phthalic anhydride or its substituted derivative in the solvent and adding it dropwise to a first mixture to obtain a second mixture; S3, adding the condensing agent to the second mixture; S4, quenching the reaction solution in ice water and extracting with ethyl acetate; S5, separating and purifying the crude product by column chromatography. The compound of this application can be used to develop novel antitumor drugs that target and degrade tumor-related proteins, possessing advantages such as molecular conformational stability, optimized physicochemical properties, hydrophobicity regulation, and enhanced binding affinity.

The present invention relates to the technical field of lithium-ion battery materials. Disclosed are a cross-linked polyimide lithium battery separator, a preparation method therefor and a use thereof. The preparation method comprises the following steps: (1) adding a diamine monomer and a dianhydride monomer in a molar ratio of 1:(0.7-0.95) to a solvent for reaction, and then adding an accelerator to obtain a polyamic acid-containing slurry; and (2) coating a porous substrate with the slurry, then soaking in a reaction solution to obtain a pre-cured film, and drying the pre-cured film to obtain a cross-linked polyimide lithium battery separator, wherein the reaction solution comprises an end‑capping agent and an organic solvent, and the end‑capping agent is selected from at least one of phthalic anhydride, 4-phenylethynylphthalic anhydride, 4-ethynylphthalic anhydride, phenylethynyl trimellitic anhydride, ethynyl bisphthalic anhydride and methyl ethynylphthalic anhydride. The preparation method can improve the temperature resistance of the separator, ensuring that the separator does not melt and deform at 350°C or less, and improving the tensile strength and puncture resistance of the separator.

The application belongs to the technical field of cables, and particularly relates to a polyvinyl chloride fire-resistant power cable and a preparation method thereof; the polyvinyl chloride fire-resistant power cable material is obtained by extruding and granulating premix; wherein, the preparation of the hybrid modified bisphenol A type epoxy resin comprises: obtaining a flame retardant by phosphate esterification reaction of phosphorus trichloride, 3-(ethylenoxy) benzene-1,2-diol and an acid binding agent; then obtaining a flame retardant precursor by Claisen rearrangement of the flame retardant, and finally obtaining a thermal stability type flame retardant by addition reaction of the flame retardant precursor and 1,3-di(amino propyl) tetramethyl disiloxane; the hybrid modified bisphenol A type epoxy resin is obtained by pre-curing the hybrid bisphenol A type epoxy resin under vacuum conditions and with the thermal stability type flame retardant, an antioxidant, phthalic anhydride and tetrabutyl titanate; the cable material can effectively improve the flame retardance, heat resistance, toughness and interface bonding capacity of the polyvinyl chloride cable.

The application discloses a viscosity reducer for exploitation of deep low-permeability heavy oil reservoirs and a preparation method and application thereof. The preparation method comprises the following steps: (1) under the conditions of existence of a solvent and a catalyst and heating, 4-halogenophthalic anhydride and glycol compounds are subjected to nucleophilic addition reaction under the atmosphere of nitrogen or inert gas to obtain a mixed solution containing intermediate A; (2) diazomethane is introduced into the mixed solution containing intermediate A, and diazomethane and intermediate A are subjected to nucleophilic transfer reaction to obtain a mixed solution containing intermediate B; (3) polyethylene glycol or dimethylaluminum is added into the mixed solution containing intermediate B, and after stirring, sodium sulfite is added, and under the condition of heating, intermediate B and sodium sulfite are subjected to sulfonation reaction of nucleophilic displacement, and after reaction, the viscosity reducer is obtained through post-treatment. The application further discloses application of the viscosity reducer as a displacement flow-increasing viscosity reducer in exploitation of deep low-permeability heavy oil reservoirs.

The present invention provides an unsaturated polyester resin for RTM molding that exhibits stable curing time regardless of storage period and can suppress the occurrence of warping in molded products obtained by RTM molding. [Solution] An unsaturated polyester resin composition comprising an unsaturated polyester resin (A) and an unsaturated monomer (B), wherein the unsaturated polyester resin (A) consists of constituent units derived from an acid component and an alcohol component, the acid component contains an unsaturated dibasic acid such as phthalic anhydride and maleic anhydride, the alcohol component contains at least one of ethylene glycol and diethylene glycol and propylene glycol, the unsaturated monomer (B) is a styrene monomer, and the unsaturated polyester resin composition contains formic acid (C), the content of which is 0.01 to 0.1 parts by mass per 100 parts by mass of the total amount of resin (A) and monomer (B), an unsaturated polyester resin composition for RTM molding.

The invention relates to the technical field of photoresist, in particular to photoresist for a capacitive touch sensor and a preparation process of the photoresist. The invention discloses a preparation process of photoresist for a capacitive touch sensor. The preparation process comprises the following steps: preparing a modified photoreaction agent; preparing modified polyimide resin powder; preparing silicon dioxide hollow carbon spheres and nano titanium dioxide hybrid particles; and preparing the photoresist. The preparation method comprises the following steps: firstly carrying out nitration reaction on 4-tert-butylphenol, then reducing nitryl into amino to obtain amino substituted 4-tert-butylphenol, protecting the amino by di-tert-butyl dicarbonate ester, then oxidizing iodobenzene into a high-valence iodine active intermediate by taking m-chloroperoxybenzoic acid as an oxidizing agent, and reacting with Boc-amino substituted 4-tert-butylphenol to obtain the high-valence iodine-substituted 4-tert-butylphenol. And finally, carrying out a replacement reaction with silver trifluoromethanesulfonate, carrying out deprotection to obtain a modified photoreaction agent, and carrying out a condensation polymerization reaction on the modified photoreaction agent, 4, 4 '-hexafluoroisopropyl phthalic anhydride and the like to generate a polyamic acid prepolymer, so that the photoetching resolution can be greatly improved.

The application relates to the technical field of fabrics, and discloses a skin-friendly antibacterial polyester blended fabric and a preparation method thereof. 4-isothiazolinone formate-based phthalic anhydride and chitosan are reacted to obtain a chitosan antibacterial finishing agent, which is then added into water, stirred and dissolved to prepare a finishing liquid. The modal / polyester blended fabric is subjected to two-dip-two-roll treatment, pre-drying, baking, washing and drying to obtain the skin-friendly antibacterial polyester blended fabric. The finishing agent contains a chitosan biological macromolecule antibacterial agent and an isothiazolinone antibacterial group, so that better antibacterial performance is achieved. The finishing agent contains hydrophilic carboxyl groups, amide bonds, hydroxyl groups and other functional groups, so that the fabric has better moisture absorption performance and good water resistance.

This invention discloses a method for preparing 1,2,3,6-tetrahydrophthalimide, comprising the following steps: using cis-1,2,3,6-tetrahydrophthalic anhydride as the reaction substrate and a gradient-release composite ammonia source as the ammonia donor, a cyclization reaction is carried out in an ionic liquid reaction system to obtain a crude reaction solution containing 1,2,3,6-tetrahydrophthalimide; the obtained crude reaction solution is cooled to crystallize, solid-liquid separation is performed, and drying is carried out to obtain 1,2,3,6-tetrahydrophthalimide; the ionic liquid reaction system uses an imidazole-based ionic liquid as the main reaction medium; the gradient-release composite ammonia source is composed of a first ammonia source and ammonium acetate; the preparation method provided by this invention, through the buffering effect of the gradient-release composite ammonia source combined with the imidazole-based ionic liquid, combined with a segmented temperature-controlled reaction scheme, matches the ammonia consumption requirements at different stages of the cyclization reaction, effectively suppresses the carbon-carbon double bond polymerization side reaction, reduces impurity generation, and significantly improves the yield and purity of the product.

A method of water treatment includes treating a mixture of water and oil with a membrane that includes a polyimide formed by polycondensation between 4,4′-(4,4′-isopropylidenediphenoxy)bis-(phthalic anhydride) (BPADA) and 2,4,6-trimethyl-m-phenylenediamine (TrMPD). The polyimide does not include fluorine. The polyimide is in the form of fibers having an average diameter of 0.5 micrometers (μm) to 5.0 μm, and the fibers are bead-free and are formed by electrospinning to form a membrane having pores with an average size of 2 μm to 10 μm.

This invention discloses a novel carboxylic acid-based viscosity-reducing nanopowder modifier, its preparation method, and its application. A group of novel carboxylic acid modifiers containing PEG fragments were successfully prepared. By molecularly coupling the carboxylic acid anchoring unit with the PEGylated acrylate structure, a modifier system with three functions of "anchoring-reaction-dispersion" was constructed. This provides a novel multifunctional modifier that combines the activity of acrylate, the flexibility of polyethylene glycol, and the anchoring ability of carboxylic acid. By introducing carboxyl groups as strongly polar anchoring groups, they can undergo esterification or coordination reactions with the hydroxyl groups on the surface of nanopowders, significantly enhancing the interfacial chemical bonding force and effectively preventing the modifier from desorbing during processing. At the same time, by introducing the rigid aromatic ring structure of phthalic anhydride, the steric hindrance effect of the molecule is increased. Its rigid framework helps maintain the effective thickness of the steric hindrance layer, which can more effectively inhibit the secondary aggregation of nanoparticles and improve the long-term stability of the dispersion.

This invention provides a high-strength, water-resistant rock wool phosphogypsum wall panel and its preparation method. The wall panel includes phosphogypsum board and rock wool. The phosphogypsum board is made from the following raw materials in parts by weight: 30-60 parts phosphogypsum, 20-30 parts quicklime, 5-10 parts modified solid epoxy resin, and 0.01-0.1 parts retarder. The amount of water added is 1.5 times the total amount of quicklime and phosphogypsum. The modified solid epoxy resin is a powder obtained by blending and extruding 100 parts of solid epoxy resin E20 or NPES-904 raw material, 20-30 parts of acid anhydride curing agent, 1-3 parts of imidazole curing agent, and 3-5 parts of amphoteric surfactant. The acid anhydride curing agent is phthalic anhydride or tetrahydrophthalic anhydride, the imidazole curing agent is dimethylimidazolium, and the amphoteric surfactant is sodium dodecylbenzenesulfonate. The retarder is citric acid, sodium tripolyphosphate, or sodium hexametaphosphate. The method described in this application produces wall panels with high strength and good water resistance due to the good dispersibility of the powder raw materials.

The present application relates to the field of pharmaceutical chemistry taraxasterol 3-ester derivative, its structural formula is shown as A, preparation is specifically taraxasterol 1 with phthalic anhydride in suitable base catalyst, organic solvent is reacted to obtain compound A, the yield of synthesis route is high, easy to operate implementation.Activity test proves that taraxasterol 3-ester derivative is a suitable antitumor candidate drug, especially as the candidate drug of anti-lung cancer.