20 results about "Dibenzoylmethane" patented technology

The invention relates to the technical field of detection kits, in particular to a preparation method of fluorescent microspheres, the fluorescent microspheres and a preparation method of a kit. According to the invention, 4-vinylbenzoic acid, dibenzoylmethane and phenanthroline are used as ligands to prepare the europium complex; the prepared europium complex, styrene and lauryl methacrylate are subjected to first-stage copolymerization polymerization to obtain a polymer core with the europium complex, itaconic acid is added for continuous polymerization in the second-stage polymerization process, and the prepared fluorescent microspheres are uniform in size, high in fluorescence intensity and high in stability. The prepared detection kit has the advantages of high detection sensitivity and stable and reliable detection effect when being used for detecting the myocardial injury marker cTnI.

The invention relates to the technical field of synthesis of organic compounds, and discloses a dibenzoylmethane preparation method, which comprises the following steps: preparation of a functionalized ionic liquid, preparation of a deep eutectic solvent, construction of a composite system, implementation of a condensation reaction, regeneration of catalytic active sites, pH adjustment, crystal separation and the like. According to the method, a temperature-responsive two-phase system formed by the functionalized ionic liquid and the deep eutectic solvent is combined with a catalyst regeneration process and a pH regulation crystallization separation technology, so that the greenization, high efficiency and integration of the dibenzoylmethane synthesis process are realized, the product purity and yield are remarkably improved, and the environmental pollution and the production cost are reduced.

The present invention relates to precursors of dibenzoylmethane compounds having an amide group on one of the rings, and corresponding photoconversion compounds, pharmaceutically or cosmetically acceptable salts thereof, or stereoisomers or mixtures thereof, for use in protecting human or animal living organisms or materials from ultraviolet light. The present invention also relates to the preparation processes thereof, as well as cosmetic compositions, pharmaceutical compositions or personal care compositions thereof.

Perfumed composition comprising at least one sulfur-containing antioxidant compound, at least one organic UV filter, and at least one perfumer. The present invention relates to a perfumed composition, particularly a cosmetic one, comprising a) at least one sulfur-containing antioxidant compound selected from compounds of formulas (I) R1-S-R2 and / or (II) R1-SS-R2, b) at least one organic UV filter selected from dibenzoylmethane derivatives, and c) at least one perfumer. Figure for the abstract: None

The invention discloses a liquid barium-zinc stabilizer and a preparation method and application thereof, and the liquid barium-zinc stabilizer is prepared from the following raw materials in parts by weight: 5-15 parts of oleic acid, 5-20 parts of p-tert-butylbenzoic acid, 2-8 parts of isocaprylic acid, 5-10 parts of diethylene glycol butyl ether acetate, 5-10 parts of cycloalkane, 5-10 parts of D80, 2-5 parts of zinc oxide, 4-10 parts of barium hydroxide monohydrate, 10-20 parts of barium salt and 2-6 parts of dibenzoylmethane. 15-25 parts of phenol-free phosphite ester and 2-6 parts of an antioxidant. The liquid barium-zinc stabilizer prepared by the invention cannot be subjected to curing reaction with an adhesive to cause degumming, and has excellent heat resistance and heat-resistant stability.

The invention relates to the technical field of air buffer tanks, and discloses an air buffer tank for dibenzoylmethane production, which comprises a tank body, a drain valve is fixedly connected to the center of the bottom of the tank body, the bottom end of the drain valve is connected with a bent pipe through a bolt, one end of the bent pipe is in threaded connection with a drainage assembly, and an air outlet pipe is fixedly connected to the top of the tank body. The top of the air outlet pipe is connected with an air delivery pipe through bolts, and the bottom end of the air delivery pipe is connected with an exhaust valve through bolts. When water exists in the tank body, the water can automatically enter the bent pipe and then enter the barrel body through the straight pipe, the connecting pipe and the water drainage hole, the water can enable the hollow ball to rise so that the first sealing plug can be pulled out of the through hole of the partition plate, and therefore the water can be automatically discharged from the water outlet nozzle; and after the water is completely discharged, the gas enters the cylinder body and acts on the hollow ball, so that the first sealing plug is driven to be plugged into the through hole of the partition plate again, and the whole structure can realize automatic water discharging to prevent loss caused by gas leakage.

This invention relates to a weather-resistant and anti-aging coating for coastal port cranes and its preparation method, belonging to the field of coating materials technology. The coating comprises component A and component B; component A includes an isocyanate-terminated prepolymer, a tri(dibenzoylmethane) ytterbium(III) complex, a spiropyran derivative, and additives; component B is obtained by dissolving isophorone diamine and 2,2'-diaminodiphenyl disulfide in ethyl acetate solvent, with a solid content of 40-60 wt%, and a molar ratio of isophorone diamine to 2,2'-diaminodiphenyl disulfide of (1-4):1; the molar ratio of isocyanate groups in component A to imino groups in component B is (1-1.05):1. This invention accelerates the exchange of dynamic disulfide bonds by constructing a photothermal conversion system, thereby enhancing the coating's ability to dissipate mechanical stress under ultraviolet light irradiation and simultaneously imparting long-term weather resistance to the coating.

The invention relates to the technical field of chemical synthesis, in particular to a tetranuclear dysprosium-based metal-organic framework material and a preparation method and application thereof. A chemical formula of the tetranuclear dysprosium-based metal-organic framework material is [Dy4 (dbm) 2 (H2L1) 2 (HL2) 2 (CH3O) 2]. 6CH3OH, H4L1 is N '2, N' 6-bis ((E)-3, 5-di-tert-butyl-2-hydroxybenzylidene) pyridine-2, 6-dicarbohydrazide, H3L2 is (E)-N '-(3, 5-di-tert-butyl-2-hydroxybenzylidene)-6-(hydroxymethyl) pyridine hydrazide, and Hdbm is dibenzoylmethane; the tetranuclear dysprosium-based metal-organic framework material crystal belongs to a monoclinic system and a C2 / c space group. The preparation method of the chiral phosphine nickel (II) complex is simple and convenient to operate, high in purity and good in reproducibility. The tetranuclear dysprosium-based metal-organic framework material disclosed by the invention is good in thermal stability, shows good catalytic performance in a cycloaddition reaction for synthesizing cyclic carbonate through CO2 catalytic conversion, and has a good application prospect.

Composite comprises polymer and lanthanide complex Au+[Ln(L1)w(L2)x(L3)y(L4)z)]-u. A is a metal cation, preferably potassium. Ln is a lanthanide, preferably Europium. L1, L2, L3, L4 are dibenzoylm

The present invention relates to a kind of preparation method of 1,3 diphenyl acetone, dibenzoylmethane and N bromosuccinimide, react under the condition of adding DMSO, and N2 is passed through during the reaction; After the reaction is completed, extraction, the lower layer of extraction solution is rotary evaporated to obtain a yellow solid, and 1,3 diphenyl acetone is prepared. Extractant is extractant A extractant B system; The extractant A is any one of sodium chloride solution, sodium nitrate solution, potassium chloride solution, and potassium nitrate solution; The extractant B is any one of dichloromethane, chloroform, and acetonitrile, and the concentration of the extractant A is at least 15wt%. By a specific extractant system, DMSO can be efficiently removed, greatly improving the purity of 1,3 diphenyl acetone. Meanwhile, the present invention also discloses that the aforementioned method obtains 1,3 diphenyl acetone, a photoinitiator system comprising the 1,3 diphenyl acetone, and a photopolymerization system.

The invention relates to the technical field of high polymer materials, and discloses a preparation method and application of a high-weather-resistance chlorinated polyethylene rubber and plastic material. The preparation method comprises the following steps: adding 1-butyl-3-methylimidazole acetate; cerium trifluoromethanesulfonate; dibenzoyl methane; the invention further provides a preparation method of the high-weather-resistance chlorinated polyethylene rubber and plastic material, and the preparation method comprises the following steps: firstly, preparing each stabilizer into a uniform liquid premixed master batch, and then carrying out melt blending on the liquid premixed master batch and resin, so that effective construction of a micro-reaction region is ensured. Through the synergetic stable system, intelligent response and long-acting catalysis of a stable function are realized, the problems of easy migration, non-uniform dispersion and short action period of a traditional auxiliary agent are fundamentally solved, the material is endowed with excellent long-term weather resistance and color stability, and the material is suitable for preparing products such as outdoor profiles and pipes.

The invention provides silicon dioxide composite nanoparticles as well as a preparation method and application thereof. The silicon dioxide composite nanoparticles comprise cationic polyelectrolyte modified silicon dioxide nanoparticles as well as resveratrol and an ultraviolet absorbent which are sequentially loaded on the outer layer of the cationic polyelectrolyte modified silicon dioxide nanoparticles, the ultraviolet absorbent is prepared from any one or a combination of at least two of bis-ethyl hexyloxyphenol methoxyphenyl triazine, methylene bis-benzotriazolyl tetramethyl butyl phenol, diethylamino hydroxybenzoyl hexyl benzoate or butyl methoxy dibenzoyl methane. The ultraviolet absorbent plays a role in sun protection externally and shields ultraviolet rays to improve the light stability of the resveratrol, the resveratrol plays a role in oxidation resistance internally and quenches free radicals to improve the light stability of the ultraviolet absorbent, and the ultraviolet absorbent and the resveratrol cooperate to achieve the dual functions of ultraviolet full-wave band efficient protection and free radical scavenging.

The present invention relates to dibenzoylmethane compound precursors having an amide group in one ring and their corresponding photoconverting compounds, their pharmaceutically or cosmetically acceptable salts, or a stereoisomer of any one of them or mixtures thereof, for use in protecting human or animal living bodies or materials from ultraviolet radiation. The invention also relates to a process for the preparation thereof, and to cosmetic or pharmaceutical or personal care compositions thereof.

The invention relates to the technical field of stabilizers, in particular to a stabilizer for a transparent PVC (polyvinyl chloride) product and a preparation method and application thereof, and the stabilizer at least comprises the following components in parts by weight: 10-18 parts of organic acid calcium zinc, 8-15 parts of an auxiliary stabilizer, 5-12 parts of an antioxidant, 4-10 parts of a lubricant, 30-55 parts of hydrotalcite and 10-25 parts of polyvinyl chloride. The auxiliary stabilizer at least comprises stearoylbenzoylmethane, dibenzoylmethane and tris (2-hydroxyethyl) isocyanurate, the sum of the addition amount of the organic acid calcium zinc and the tris (2-hydroxyethyl) isocyanurate is smaller than or equal to 26 parts by weight, and through the combined action of the multiple components, the provided product has the advantages of environmental protection, high transparency, excellent thermal stability and wear resistance; the application defect of the calcium-zinc stabilizer in transparent PVC products is effectively overcome, and the actual application requirement is better met.

This invention discloses a class of eight-coordinate europium(III) complexes using deuterated phenanthroline derivatives as ligands and their preparation method, belonging to the field of organic semiconductor luminescence technology. The complexes have the structural formula shown in formula (I). This type of material uses D₂O for deuteration to synthesize [D₈]-1,10-phenanthroline ligands and [D₁₀]-dibenzoylmethane ligands, which are then complexed with europium trichloride hexahydrate. When X is H, an eight-coordinate europium(III) complex [D₈]-Eu(DBM)₃Phen is synthesized; when X is D, [D₈]-Eu([D₁₀]-DBM)₃Phen is synthesized. This type of complex uses phenanthroline with a deuterium azide conjugated structure as a ligand, allowing these europium(III) complexes to exhibit better thermodynamic stability and organometallic luminescence performance through stepwise deuteration.

The invention belongs to the field of ultraviolet absorber technology, and in particular to a kind of ultraviolet absorber and preparation method thereof, comprise the following steps: S1: in an oxygen-free atmosphere, 2,4-dihydroxybenzophenone, potassium carbonate and N, N-dimethylformamide are mixed, chlorodibenzoylmethane is added, temperature reaction is warmed up;Reaction solution is cooled to room temperature, poured into water, pH is adjusted to 7-8, extraction, washing, drying, compound A is obtained through chromatographic column;S2: compound A, emulsifier and polylysine solution are mixed, sodium carboxymethyl cellulose solution is added dropwise, and reacted after adjusting pH to 5-6;S3: glutaraldehyde solution is added to the system of step S2, reacted after adjusting pH to 6-8, and reactant is obtained;Reactant is centrifuged, supernatant is removed, suction filtration, washing, drying, ultraviolet absorber. The ultraviolet absorber provided by the present invention has excellent absorptive properties.

The invention discloses a waste liquid treatment device for dibenzoylmethane preparation, and relates to the technical field of waste liquid treatment. Comprising a base plate, a first motor is fixedly mounted at the upper end of the base plate, a sealing plate is arranged at one end, close to the upper end, of the base plate, an isolation bin is fixedly connected to the middle of the bottom end surface of the sealing plate, and a protective sleeve is arranged at the lower end of the isolation bin. Through the arrangement of an isolation bin accessory structure, an extension rod close to the lower end can be driven to do reciprocating up-down and rotary motion in the operation process, so that waste liquid in the treatment bin is fully stirred up and down in cooperation with a protection sleeve accessory, it is ensured that waste liquid raw materials and added treatment liquid are fully mixed, and the layering phenomenon is avoided; meanwhile, the accessory structure of the protective sleeve can stir the waste liquid in an action similar to duck web paddling in the operation process, and the injected treatment liquid can be discharged from the deep part of the waste liquid, so that the mixing efficiency is further improved.

The invention provides a butyl adhesive tape as well as a preparation method and application thereof, and belongs to the technical field of high polymer materials and new energy. The butyl adhesive tape comprises a functional layer and a bonding layer arranged on the surface of at least one side of the functional layer, the functional layer comprises the following components in parts by mass: 80-120 parts of brominated butyl rubber, 30-40 parts of a carboxylated polyisobutene derivative, 5-10 parts of a self-repairing network agent and 0.5-1 part of a light conversion agent; wherein the self-repairing network agent comprises amino polysiloxane containing a cystamine disulfide bond; the light conversion agent comprises an inner core and a shell layer arranged on the surface of the inner core, the inner core comprises a europium-dibenzoylmethane complex, and the shell layer comprises hydrophobic modified SiO2; the bonding layer comprises a coupling agent. By adjusting the dosage of each component, the self-repairing efficiency and the light conversion rate of the butyl adhesive tape can be remarkably improved, and meanwhile, relatively high light transmittance and bonding strength are kept.

The invention relates to the technical field of luminescent materials, in particular to red fluorescent waterborne polyurethane of rare earth europium complex grafted functionalized graphene, a preparation method of the red fluorescent waterborne polyurethane and application of the red fluorescent waterborne polyurethane in an intelligent anti-corrosion monitoring coating. A red fluorescent complex is synthesized in an ethanol solvent by taking Eu < 3 + > as a central ion, the complex and amino graphene oxide modified by 3-aminopropyltrimethoxysilane are bonded to form a functionalized graphene oxide material, and finally, the modified material is taken as a chain extender and is respectively connected to a polyurethane main chain to form the functional graphene oxide composite material. The method disclosed by the invention has the characteristics of being simple in synthesis process, green, environment-friendly and the like, and the product has the characteristics of being good in stability, high in fluorescence intensity, capable of intelligently monitoring the corrosion degree through visible fluorescence intensity, high in mechanical property, wide in application range and the like.