75results about How to "Reduce electron cloud density" patented technology

The invention belongs to the technical field of osier dyeing, in particular to a dyeing method for improving color fastness to light of osier. The method specifically comprises the following steps of (1) osier pretreatment and (2) osier dyeing. The permeation of a coloring agent is effectively improved, the degree of aggregation of dye molecules is higher, crosslinking binding between the dye molecules and the ingredients of osier is prompted, the binding force is high, leachability resistance is good, the electronic cloud density of azo group hydrogen atoms is reduced, the shielding effect on azo groups is achieved, the photooxidation resistance stability of the azo groups in the structure of the dye molecules is improved, and finally, the color fastness to light of a dye is improved; and furthermore, osier is evenly dyed and has good color fastness to water, the difference between the color of the interior and the color of the exterior of osier is small, osier is evenly dyed without stains, and is bright and glossy, and the quality of the wickerwork made of osier is effectively improved.

The invention relates to a Salen catalyst using CN as an axial ligand, and a preparation method and application thereof. The method comprises the following preparation steps of (1) synthesizing Salen H2; (2) performing mixing reaction on the Salen H2 with metal M salt ethyl alcohol solution to synthesize Salen-M; (3) performing mixing reaction on the Salen-M and the metal cyanide solution to synthesize the Salen catalyst using CN as the axial ligand. Compared with the prior art, the method has the advantages that the cyano group with strong electron absorption capability is used as the axial ligand; the catalyst is stable; the deterioration and inactivation cannot easily occur; in a reaction process of catalyzing the copolymerization of carbon dioxide and epoxypropane to synthesize polycarbonate, the inhibition of the generation of cyclic carbonates byproducts is facilitated; the reaction window is widened; under the high-temperature polymerization condition, the activity of the Salen catalyst can be greatly improved.

The invention, discloses an alkenyl-and-esteryl-containing compound, a preparation method of the alkenyl-containing esteryl compound and bismaleimide resin modified by the alkenyl-containing esteryl compound, and relates to a compound, a preparation method thereof and bismaleimide resin modified by the compound. The invention aims at solving the problems of the existing bismaleimide resin that the water absorption rate is high; the bonding strength is low at high temperature and high damp and hot environment after curing; the curing temperature is high. A general structure formula is shown in the desciption. The preparation method is characterized in that terephthalyl chloride, 2-alkenyl phenol and a catalyst are added into a solvent; temperature rise reaction is performed; after the reaction, temperature reduction, filtering, precipitation, filtering, methanol washing and drying are performed. The bismaleimide resin modified by the alkenyl-and-esteryl-containing compound is prepared from bismaleimide and the alkenyl-and-esteryl-containing compound.

The invention relates to the field of chemical industry, and discloses a synthetic method of N-n-butyl-1,2-benzisothiazolin-3-ketone. The method comprises the following steps: S1) in an organic solvent, o-(methylthio) benzoic acid and an acyl chloride agent are subjected to a reaction to obtain o-(methylthio) benzoyl chloride; S2) the o-(methylthio) benzoyl chloride is dissolved in the organic solvent, a mixture of n-butylamine and the organic solvent is added and subjected to an amidation reaction to obtain N-n-butyl o-(methylthio) benzoyl chloride; S3) the N-n-butyl o-(methylthio) benzoyl chloride is dissolved in water, hydrogen peroxide is added, and the materials are subjected to an oxidation reaction to obtain N-n-butyl o-(methylthio) benzoyl chloride oxide; and S4) in the organic solvent, the N-n-butyl o-(methylthio) benzoyl chloride oxide and the acyl chloride agent are subjected to a ring-closure reaction to obtain the N-n-butyl-1,2-benzisothiazolin-3-ketone. The method can effectively avoid the generation of an O-substituted derivative, the ring-closure reaction is easily carried out, a target product is easily generated, and the cost is low.

The invention discloses a preparation method of anti-aging moisture-curing vinyl resin and belongs to the technical field of resin preparation. Cumarin prepared in the method is high in fluorescence quantum yield and stability, so that impact of ultraviolet radiation on the vinyl resin is lowered. In addition, cumarin has high antioxidation performance, and increase of crosslinking degree lowers aging degradation ability of the vinyl resin, so that the defect that the vinyl resin is prone to yellowing and pinking is improved, and anti-aging effect is realized. A PAE intermediate can polymerizeand generate a PAE emulsion during preparation of the vinyl resin and can be in covalent bond combining with hydroxyl in epoxy resin to form a crosslinked structure in the vinyl resin, so that dispersion stability of the PAE emulsion during curing is improved; after the PAE emulsion is modified through diethanol amine, molecular weight of PAE is lowered, which leads to decrease of viscosity of the emulsion, so that water loss of the vinyl resin in a humid condition during curing is intensified, the vinyl resin can maintain high strength after curing without being softened, and the vinyl resinhas wide application prospect.

The invention relates to a wool-like polyester filament and a preparation method thereof. The preparation method comprises the steps: firstly, terephthalic acid, 1,4-butanediol, fluorinated diacid, hexanediol with tertiary butyl side groups, and 2,5,6,6-tetramethyl-2,5-heptanediol are evenly mixed, and then an esterification reaction and a polycondensation reaction are carried out successively toprepare modified polyester; then a modified polyester POY filament is prepared from modified polyester flux according to a POY process; and finally a modified polyester DTY filament is prepared from the modified polyester POY filament according to a DTY process, and then the wool-like polyester filament is obtained. According to a prepared product, when the temperature is 100 DEG C, the dye-uptakeis 90.32-93.27%, and the K/S value is 22.15-23.42; after the product is placed at temperature of 25 DEG C and the relative humidity of 65% for 60 months, the intrinsic viscosity of the product is lowered by 17-20%; and the preparation method is low in cost and simple in process, and the prepared product is excellent in dyeing property and high in natural degradation speed, and has great application prospects.

The invention discloses a method for preparing a steel structure aqueous corrosion-resistant fireproof coating material and relates to a coating preparation method. The method comprises the followingsteps: establishing a melamine and phytic acid flame-retardant layer from molybdenum diselenide (MoSe2) nanosheets by using a layer-by-layer self-assembling method (LBL), and filling an aqueous epoxyresin with the functionalized molybdenum diselenide nanosheets, so as to obtain a steel structure aqueous corrosion-resistant fireproof coating. By adopting the method, the P-N system flame-retardantlayer is prepared, so that the flame retardancy of the aqueous epoxy resin can be improved; the phytic acid in the nano packing has great chelation potential energy, so that the coating can be connected in a relatively intense mode through the phytic acid, and the corrosion resistance and the durability of the coating can be improved; the problem that a nano particle is liable to aggregate becauseof the high surface energy can be also solved.

The invention relates to a high light fastness azo type red reactive dye. The dye adopts an azo structure as the chromophoric parent, takes chlorine or fluorotriazine, ethyl sulfone sulfate as the active group, and a pyrazolone heterocyclic structure is introduced into the azo dye with H acid as the coupling component. The dye is used for cotton fiber dyeing, and compared with the red dye using H acid as the coupling component, the sunlight fastness is increased by 1 grade to 1.5 grades, and the reactive dye has ideal light fastness.

The invention discloses an ortho-fluoro-azobenzene derivative and a preparation method thereof. The ortho-fluoro-substituted azobenzene derivative is prepared by a diazotization coupling method; two fluorine atoms are introduced into the ortho-position of azobenzene, so that the electronic cloud density of nitrogen-nitrogen double bonds can be effectively reduced; the red shifting of azobenzene molecular absorption spectroscopy can be realized; the stability performance of a cis-configuration is greatly improved. The method of synthesizing the ortho-fluoro-azobenzene through diazotization coupling reaction is simple and efficient; the yield is high; the obtained material has excellent optical performance, and is hopeful to be applied in the fields of light driving, light energy storage, supramolecular assembly and the like.

The invention discloses a fluorinated derivative based on azobenzene and a preparation method of the fluorinated derivative. An ortho-fluoro substituted azobenzene derivative is prepared by using a diazotization coupling method, two fluorine atoms are introduced at the ortho positions of azobenzene, so that the electron cloud density of nitrogen-nitrogen double bonds is effectively reduced, the red shift of the absorption spectrum of an azobenzene molecule is realized, and the stability of cis-configuration is greatly improved. Synthetizing ortho-fluoro substituted azobenzene through a diazotization coupling reaction is simple and efficient, the yield is relatively high, and the obtained material has excellent optical performance, and is expected to be applied in the fields of optical driving, light energy storage and supramolecular assembly and the like.

The invention relates to degradable ultra-light FDY fiber and a preparation method thereof. The method comprises the steps that terephthalic acid, propylene glycol, fluorine-containing dicarboxylic acid and dihydric alcohol with a trimethylsilyl side group are mixed evenly, then modified polyester is prepared through an esterification reaction and a condensation polymerization, and then the degradable ultra-light FDY fiber is prepared from modified polyester melt by means of a triangular or linear spinneret plate according to an FDY process; the fluorine-containing dicarboxylic acid is 2,2-difluoro-1,3-malonic acid or 2,2-difluoro-1,4-succinic acid or 2,2-difluoro-1,5-glutaric acid or 2,2,3,3-tetrafluoro-1,4-succinic acid, and the structural formula of dihydric alcohol with the trimethylsilyl side group is defined in the description, wherein R is -CH2-, -CH (CH3)- or -C((CH3)2)-. The cross section of the prepared ultra-light FDY fiber is shaped like a triangle or a Chinese character 'yi'. The method is simple in process, and the finally prepared fiber is good in degradable property and easy to recover and utilize.

The invention relates to the technical field of antibacterial coatings, and discloses a nano silver-chitosan-modified polybenzenesulfonamide antibacterial coating and a preparation method thereof. Theformula of the nano silver-chitosan-modified polybenzenesulfonamide antibacterial coating includes the following materials: 2,6-di-carboxybenzenesulfonyl chloride, ammonium nitrate, a catalyst, sodium hydroxide, concentrated sulfuric acid, an initiator, chitosan, nano silver and a dispersant. According to the nano silver-chitosan-modified polybenzenesulfonamide antibacterial coating and the preparation method thereof, sulfonyl imide groups in the polycarboxybenzenesulfonamide has strong reducing properties so that the antibacterial coating has good antibacterial properties, and since esterification is performed between a large number of active -OH groups which are contained in chitosan and carboxyl groups in polycarboxybenzenesulfonamide so as to form electron-withdrawing ester groups with high chemical energy; and through the electronic effect of the electron-withdrawing ester groups, the electron cloud density of the sulfonyl groups is reduced, the chemical energy of the sulfonyl groups is enhanced, and the chemical stability and thermal stability of the polycarboxybenzenesulfonamide are improved, so that the antibacterial coating has no easy oxidation by oxygen in the air or noeasy light degradation.

The invention discloses a flexible-chain-contained dikaryotic anthracene pyridine sulfoacid compound with a formula I or salt thereof. A fuchsin ink composition prepared from the compound and the salt thereof presents a color with extremely-high distinction and brightness on ink-jet recording paper, and has excellent solubility, and the filtering performance of paired filter membrane devices is good in the manufacturing process of the ink composition. In addition, after long-time storage, the ink composition has no crystallization, physical change or color change and the like, and the storage stability is good. A printed object using the fuchsin ink composition has the advantages that recorded materials are not selected, the colors of color images with photo colors can be restored and presented truly, the fastness properties such as the light resistance, the ozone resistance and the wet resistance are good, and the long-time storage of the images is stable.

The invention relates to fluorine-contained binary acid modified polyester FDY fibers and a preparation method thereof. Fluorine-contained binary acid modified polyester melts are spun to prepare thefluorine-contained binary acid modified polyester FDY fibers; the preparation method of the fluorine-contained binary acid modified polyester FDY fibers includes the steps that terephthalic acid, ethylene glycol, fluorine-containing binary acid, solid heteropolyacid powder which is roasted at high temperature and metallic oxide doped and modified Sb2O3 powder are mixed uniformly and then subjectedto an esterification reaction and a condensation polymerization reaction, wherein solid heteropolyacid is one or more SiO2-TiO2, SiO2-ZrO2, B2O3-Al2O3, TiO2-ZnO and SiO2-CaO, and after the fluorine-contained binary acid modified polyester FDY fibers are put for 60 months under the conditions that the temperature is 25 DEG C, and relative humidity is 65%, the intrinsic viscosity is decreased by 20-26%. The method is simple in technology, and the fluorine-contained binary acid modified polyester FDY fibers are high in natural degrading efficiency and good in quality.

The invention provides a benzocarbazole derivatives and an organic light-emitting device thereof and relates to the technical field of organic optoelectronic materials. The compounds have simple preparation method and are prepared from easy-to-obtain raw materials, have good stability and high carrier transmission efficiency. When being applied to OLEDs as a main material, the compounds can effectively reduce driving voltage, increase light-emitting efficiency of the devices and prolong service life of the devices. The compounds are a type of organic electroluminescence material having excellent performances.

The invention relates to the field of reactive dye, and particularly relates to a reactive dye substituted by benzene-containing sulfonamide and a derivative of the benzene-containing sulfonamide, anda preparation method of the reactive dye. The reactive dye substituted by the benzene sulfonamide and the derivative of the benzene sulfonamide has a structure represented by a general formula I. Inmolecules of the reactive dye, benzene sulfonamide and substituted benzene sulfonamide groups are directly connected with halogenated s-triazine molecules, and the electron-cloud density of carbon atoms on a triazine ring is reduced through an electron-absorbing effect, so that a nucleophilic substitution reaction occurs easily, therefore, reaction activity of the triazine structure is equivalentto reaction activity of aniline ethyl sulfonyl sulfate, the reaction rate of the dye at 60 DEG C is equivalent to the reaction rate at 90 DEG C, and energy-saving dyeing under mild conditions can be realized. In addition, the dye has high light fastness and has a wide application prospect.

The invention discloses ether bond bridged polysulfone sulfonated polyether sulfone, and a preparation method of ether bond bridged polysulfone sulfonated polyether sulfone and a method for preparinga proton exchange membrane prepared from ether bond bridged polysulfone sulfonated polyether sulfone. A repeating unit of ether bond bridged polysulfone sulfonated polyether sulfone comprises at leasttwo ether bond bridged sulfone groups, the sulfonic acid groups are more concentrated, and the existence of sulfone groups can further reduce the proton conductivity of benzene rings in which the sulfonic acid groups are located, and increase the proton conductivity and hydrolysis resistance stability of the proton exchange membrane. The polymer obtained by the invention has higher molecular weight, excellent solubility and high thermal stability; the ether bond bridged polysulfone sulfonated polyether sulfone is simple in preparation process, easy to control reaction conditions and suitablefor industrial production. The proton exchange membrane prepared from ether bond bridged polysulfone sulfonated polyether sulfone, disclosed by the invention, has higher proton conductivity, and a single cell assembled by the proton exchange membrane has highcell performances.

The present invention discloses an α-silane coupling agent and application thereof. The α-silane coupling agent has a structure formula of formula (I):

R₁ is alkyl with 1 to 6 carbon atoms; R₂ is alkyl with 1 to 6 carbon atoms; R₃ is alkyl with 1 to 6 carbon atoms; R₄ or R₅ is selected from one of hydrogen, alkyl with 1 to 18 carbon atoms, aryl, benzyl, ester-containing group, carbamido-containing group or heterocyclic alkane; R₄ and R₅ are the same or different. The α-silane coupling agent is applied to silicone rubber, which can be cured without adding a catalyst, and the curing speed is fast; the α-silane coupling agent has strong reactivity, the surface curing time is less than 2 minutes; and the α-silane coupling agent has good stability, which can be stored stably under conditions at room temperature for 6 months, and does not easily turn yellow.

The invention relates to a high-strength weather-resistant modified silane sealant and a preparation process thereof, and belongs to the technical field of sealant preparation. The method comprises the following steps: taking papermaking black liquor rich in lignin as a raw material; firstly, removing cellulose and hemi-cellulose by tartaric acid acidolysis; carrying out acid precipitation under the assistance of hydrochloric acid to obtain lignin; then preparing lignin colloidal spheres, namely dried substances, from lignin through a supramolecular self-assembly method; wherein the surface effective phenolic hydroxyl group content is improved; then, enabling salicylaldehyde and acetic anhydride to react under the action of sodium acetate through a Perkin method to generate coumarin; compounding coumarin with the dried substances to obtain a compound weather-resistant reinforcing additive, and finally mixing the compound weather-resistant reinforcing additive, silane modified polyetherresin and other auxiliary materials to finally obtain the high-strength weather-resistant modified silane sealant, which is high in strength, good in weather resistance and wide in application prospect.

The invention discloses a preparation method and application of a supported copper-based catalyst. The preparation method of the supported copper-based catalyst comprises the following steps: (1) dissolving a precursor in a solvent to obtain a precursor solution; (2) mixing the precursor solution with a porous solid carrier, carrying out equivalent-volume impregnation in a thermostat at 30-60 DEG C for 10-180 minutes, carrying out microwave radiation for 5-60 minutes at the microwave power of 1000-2000 W, and then carrying out vacuum drying at 40-60 DEG C for 3-8 hours; and finally, irradiating with blue light of 400-480 nm for 10-120 minutes to obtain the supported copper-based catalyst. The porous solid carrier is activated carbon, the precursor is copper salt and a boride auxiliary agent, and in the supported copper-based catalyst, the copper loading capacity is 0.5-30.0 wt%, and the boride loading capacity is 0.1-3.0 wt%; or the porous solid carrier is a porous boride carrier, and the precursor is copper salt. The invention provides the application of the prepared supported copper-based catalyst in acetylene hydrochlorination reaction, and the supported copper-based catalyst has high catalytic activity and high stability.

The invention belongs to the field of medicine synthesis and particularly relates to an osimertinib intermediate and a preparation method thereof. The provided osimertinib intermediate is a compound in a formula C and has a structural formula in the description, wherein R is alkyl or aryl; R1 is alkyl, more preferably, methyl. After the compound in the formula C is hydrolyzed, the compound and a compound in a formula E are subjected to a condensation reaction, a compound in a formula F is prepared, wherein R is alkyl or aryl; R1 is alkyl, more preferably, methyl.

The invention belongs to the technical field of polymer electrolyte, and particularly discloses a method for catalyzing primary amine-acrylate biaddition reaction and application of the method. According to the method, lithium salt is introduced into a reaction system of a primary amine monomer and an acrylate monomer to serve as a catalyst; lithium ions dissociated from the lithium salt are coordinated with carboxyl in the acrylate monomer to reduce the electron cloud density of double bonds, so that a secondary amine mono-addition intermediate product generated after the mono-addition reaction of the primary amine monomer and the acrylate monomer is catalyzed to perform a second-step addition reaction; the tertiary amine biaddition product is obtained. The lithium salt is utilized to catalyze the primary amine-acrylate biaddition reaction, the reaction efficiency is greatly improved, the conversion rate is high, the gel polymer electrolyte is prepared in situ by utilizing the reaction system, the method is simple and efficient, the reaction condition is mild, and the prepared gel polymer electrolyte material is stable in structure and has excellent electrochemical performance.

The invention relates to an ultra-bright polyester moderately-strong filament and a preparing method thereof. The ultra-bright polyester moderately-strong filament is prepared through metering of modified polyester melt, extruding of a spinneret plate, cooling, oiling, secondary stretching, primary heat setting and winding. A molecular chain of modified polyester comprises a terephthalic acid chain segment, an ethylene glycol chain segment, a fluorinated dibasic acid chain segment, a dibasic alcohol chain segment with a trimethyl silicon side group and a dibasic acid chain segment with a tertiary butyl side group. The ultra-bright polyester moderately-strong filament has the dye-uptake of 88.3-93.2% at the temperature of 125 DEG C and has the K/S value of 23.65-25.78, the fastness to soaping reaches the fifth grade, the dry friction fastness reaches the fifth grade, and the wet friction fastness is higher than the fourth grade; the intrinsic viscosity of the ultra-bright polyester moderately-strong filament is reduced by 15-20% after the filament is placed for 60 months at the temperature of 25 DEG C and the relative humidity of 65%. The method is simple in process, and the prepared polyester moderately-strong filament is good in degradability and dyeing performance.

The invention discloses a method for breaking yeast cell walls and preparing a yeast extract. According to the method, an enzymolysis wall breaking technology is adopted, the used enzyme is papain modified by biotin, and an enzymolysis accelerant diacetyl tartaric acid diglyceride is added; the wall breaking rate and the wall breaking efficiency are greatly improved, and the principle is that in the process of breaking protein in the yeast cell walls, the electron cloud density of a C-N bond in the protein is further reduced, and the protein and the papain modified by biotin are combined together, so that the wall breaking rate and the wall breaking efficiency are improved. The method is simple to operate, the utilization rate of yeast resources is improved, the production cost is reduced,and the method has relatively high practicability.

The invention discloses a method for catalyzing asymmetric synthesis of a chiral beta-alkynyl-beta-aminoketone derivative. A chiral binaphthol derivative shown in a formula (3) is used as a catalyst;in the presence of an organic solvent, a catalyst and an additive, alkynyl potassium fluoroborate represented by the formula (2) performs asymmetric 1, 4-addition reaction for an aza-ketene compound represented by the formula (1), and a beta-alkynyl-beta-aminoketone derivative shown as a formula (4) and containing a chiral center is generated, and the reaction formula is as follows as is shown inthe specification. A novel catalyst with a polyfluorobinaphthol skeleton is utilized, alkynyl potassium fluoborate with good functional group compatibility and stable properties is used as a nucleophilic reagent, and various chiral beta-alkynyl-beta-aminoketone derivatives are efficiently prepared under the action of various additives. The substrate is wide in application range, the reaction conditions are simple and mild, the obtained product with high optical activity can be further converted into multiple non-natural chiral beta-amino acid derivatives, and high scientific research and practical application value is achieved.