8 results about "Ethyl bromoacetate" patented technology

The invention relates to the field of pipes, and discloses a high-flame-retardance MPP cable protection pipe and a preparation method thereof.The cable protection pipe comprises polypropylene resin, modified graphene oxide, modified maleic anhydride grafted polypropylene and auxiliaries; the modified graphene oxide is prepared by grafting a modified benzotriazole intermediate and a double-bond DOPO derivative substituted cyclotriphosphazene derivative into graphene oxide; the modified benzotriazole intermediate is prepared by grafting 2-(2, 4-dihydroxyphenyl)-2H-benzotriazole and ethyl bromoacetate, and then reacting with 2, 2, 6, 6-tetramethyl-4-piperidinol; the double-bond DOPO derivative is prepared through the reaction of DOPO-HQ and 4-vinyl benzyl chloride; the modified maleic anhydride grafted polypropylene is prepared by grafting octa-aminopropyl polyhedral oligomeric silsesquioxane prepared by a polycondensation reaction of 3-aminopropyltriethoxysilane and maleic anhydride grafted polypropylene. The pipe prepared by the invention has good mechanical properties, ultraviolet aging resistance, low-temperature toughness, heat resistance, flame retardance and wear resistance.

The present application relates to a kind of electrolyte additives and its preparation method, belong to electrolyte technical field;The present application uses propenyl-1,3-sulfonic acid lactone as raw material, using the double bond of propenyl-1,3-sulfonic acid lactone and the amino group of 4-amino-2-(trifluoromethyl) thiophene occurs Michael addition reaction under the catalysis of 1,8-diazabicyclo (7-ene) Undecane, obtain the intermediate with tertiary amine structure, then through the quaternary ammonium salt reaction of tertiary amine structure of intermediate and bromo atom of ethyl bromoacetate, obtain additive, the additive of the present application and phosphate ester additive are compounded to obtain electrolyte additive, the present application is modified by propenyl-1,3-sulfonic acid lactone, introduce fluorinated alkyl, effectively reduce intermolecular force, weaken the dependence of electrolyte viscosity on temperature, improve the ionic conductivity of electrolyte under low temperature condition.

The invention discloses a substituted benzoxazinone-isoxazoline compound as well as a preparation method and application of the substituted benzoxazinone-isoxazoline compound. The preparation method comprises the following steps: by taking DMF (Dimethyl Formamide) as a solvent, reacting ethyl bromoacetate with a compound (II) to generate a compound (III), performing cyclization in the presence of acetic acid and reduced iron powder to obtain a compound (IV), reacting the compound (IV) with hydroxylamine hydrochloride to generate a compound (V), reacting the compound (V) with NCS and MMA (Methyl Methacrylate) in the presence of TEA (Tetraethyl Ammonium) to generate a compound (VI), and reacting the compound (VI) with NCS and MMA to generate a compound (V). Reacting the compound (VI) with propargyl bromide to obtain a substituted benzoxazinone-isoxazoline compound, performing alkaline hydrolysis on the substituted benzoxazinone-isoxazoline compound, and performing condensation reaction on the substituted benzoxazinone-isoxazoline compound and alcohol or amine to obtain a target product. According to the present invention, the weeding activity test results of the obtained product show that the inhibition effects of the compounds I1, I2, I4, I15 and I16 on the rape are good under the concentration of 100 ppm, the excellent weeding activity is provided, and the good prevention and control effect on the invasive organism zinnia elegans is provided.

This invention relates to the field of lithium battery technology, and more particularly to a preparation process for a lithium battery additive. The process first prepares a Zn-MOF-74 catalyst through dissolution, crystallization, separation, and stepwise vacuum drying. Then, using γ-valerolactone as a solvent, propenyl-1,3-sulfonyl lactone undergoes an addition reaction with 4-aminophenylboronic acid under the action of the catalyst to generate an intermediate. This intermediate then undergoes a substitution reaction with ethyl bromoethyl, followed by recrystallization and vacuum drying to obtain a sulfonate-boron-oxygen heterocyclic synergistic additive. This additive utilizes the synergistic effect of the sulfonate group and the boron-oxygen heterocycle to improve the ionic conductivity of the electrolyte and inhibit its decomposition, significantly improving the room-temperature cycle life, wide-temperature-range discharge performance, and high-temperature storage stability of lithium batteries. The preparation process is controllable, the product has high purity, and it is suitable for various high-performance lithium batteries.

The invention relates to the field of filter bags, and discloses a PPS dust removal filter bag and a preparation method thereof, the dust removal filter bag comprises polyphenylene sulfide resin, a modified composite filler and a hyperbranched additive; the modified composite filler is prepared by grafting a modified silane coupling agent and the composite filler; according to the modified silane coupling agent, cyanuric chloride and an aminated antioxidant prepared through a reaction of 3-(3, 5-di-tert-butyl-4-hydroxyphenyl) propionyl chloride and p-phenylenediamine are subjected to substitution to prepare a triazine ring substituent, and then N, N '-bis-(2, 2, 6, 6-tetramethyl-4-piperidyl)-1, 2, 4-triazine-1, 3, 5-triazine-1, 3, 5-triazine-1, 3, 5-triazine-1, 3, 5-triazine-1, 3, 5-triazine-1, 3-triazine-1, 3-triazine-1 the triazine ring intermediate is prepared by reacting 1, 6-hexamethylenediamine with a triazine ring substituent, and the triazine ring intermediate is grafted with 3-aminopropyltriethoxysilane. The hyperbranched additive is prepared by carrying out ester exchange on an additive intermediate prepared by reacting tris (2-hydroxyethyl) isocyanurate and ethyl bromoacetate and diphenyl dihydroxysilane. The material prepared by the invention has good mechanical properties, oxidation resistance, high temperature resistance, wear resistance and ultraviolet resistance.

The invention discloses [1] rotaxane molecular compounds and a synthetic method thereof, and the synthetic method comprises the following steps: under the protection of inert atmosphere, carrying out nucleophilic substitution reaction on a compound A, sodium hydride and ethyl bromoacetate in N, N-dimethylformamide to obtain a compound B; performing nucleophilic substitution reaction with pyridine and trifluoromethanesulfonic anhydride to obtain a compound C; then carrying out a coupling substitution reaction with a compound D, bis (triphenylphosphine) palladium dichloride and 2-dicyclohexylphosphine-2 ', 4', 6 '-triisopropyl biphenyl to obtain a compound E; performing hydrolysis reaction with sodium hydroxide to obtain a compound F; under the protection of inert atmosphere, carrying out nucleophilic substitution reaction on the compound G, the compound H and potassium carbonate in N, N-dimethylformamide to obtain a compound I; performing hydrazinolysis reaction on the compound I and hydrazine hydrate to obtain a compound J; and under the protection of inert atmosphere, carrying out condensation reaction on the compound J, a compound F, 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide hydrochloride and 1-hydroxybenzotriazole to obtain the [1] rotaxane molecular compound.

The application provides preparation and application of a polyphosphazene-based hydrogel with inherent antibacterial property, which is prepared by modifying polyphosphazene with ethyl bromoacetate to obtain a quaternary ammonium salt grafted polymer PZBA, and is formed by crosslinking of the quaternary ammonium salt grafted polyphosphazene-based polymer (PZBA) and polyvinyl alcohol (PVA). The polyphosphazene-based hydrogel (PZBA-PVA hydrogel) of the application can down-regulate pro-inflammatory cytokines, has an anti-inflammatory effect, and up-regulates the expression level of growth factors to promote tissue regeneration. The hydrogel prepared by the application has good tissue adhesion, biocompatibility and antibacterial property, plays an antibacterial and wound healing promoting role on infected wounds, and can be used for preparing antibacterial and wound healing promoting drugs.

The invention discloses an anionic fluorocarbon surfactant as well as a preparation method and application thereof, and belongs to the technical field of surfactants, the method specifically comprises the following steps: (1) in an argon atmosphere, dropwise adding hexafluoropropylene dimer and ethyl bromoacetate into a mixed solution of N-N dimethylacetamide, tetrabutylammonium bromide and potassium fluoride, and stirring to obtain a mixed solution; heating the reaction system at 80 DEG C for 24 hours, cooling to room temperature, and performing post-treatment to obtain a compound 1; (2) in an argon atmosphere, dissolving the compound 1 in absolute ether, dropwise adding into a Schlenk tube containing absolute ether and LiAlH4, stirring and reacting at room temperature for 3 hours, heating to 40 DEG C, stirring for 4 hours, cooling to room temperature, and post-processing to obtain a compound 2; and (3) dissolving the compound 2 and triethylamine in tetrahydrofuran, slowly dropwise adding chlorosulfonic acid, reacting for 3 hours in an ice-water bath, reacting for 6 hours at normal temperature, and performing post-treatment to obtain the sulfate anionic surfactant. The surfactant effectively solves the problems of environmental pollution and insufficient performance.