174 results about "Trimethyl benzene" patented technology

The present invention discloses a high-gloss environmentally friendly UV-curable luminous ink and a preparation method thereof, which belongs to the technical field of UV-curable luminous ink. The ink comprises the following raw materials in parts by weight: 78 to 84 parts of bio-based polyurethane prepolymer, 38 to 45 parts of bio-based acrylate monomer, 10 to 15 parts of modified 2,4,6-trimethylbenzoylphenylphosphonic acid ethyl ester as UV curing initiator, 11 to 16 parts of luminous powder, 7 to 10 parts of micro powder filler, and 4 to 8 parts of auxiliary agent; the bio-based polyurethane prepolymer is obtained by reacting castor oil, resorcinol, fructose and 1,5-pentamethylene diisocyanate in a weight ratio of 8 to 12:2 to 3:13 to 17:4 to 9. In the above manner, the prepared high-gloss environmentally friendly UV-curable luminous ink is coated on a substrate and then subjected to UV light curing treatment (curing energy 2800mJ / cm 2 ), the thickness of the cured film can be controlled more loosely, and the cured film thickness can be controlled at 8-12μm. The cured film has good coating appearance, friction resistance, stain resistance and gloss.

The invention discloses an aluminum substrate UV matt finish paint and a preparation process thereof, and relates to the technical field of paints.The aluminum substrate UV matt finish paint is prepared from, by mass, 10%-20% of modified polyurethane acrylate, 25%-32% of high-functionality aliphatic polyurethane acrylate, 18%-30% of special modified epoxy acrylate resin, 0.5%-2% of dispersing agent, 0.1%-0.5% of defoaming agent, 1%-3% of anti-settling powder and the balance water. The paint is prepared from the following components in percentage by weight: 10 to 15 percent of magnesium silicate mineral, 1 to 10 percent of matting powder, 0.2 to 1 percent of 1-hydroxycyclohexyl phenyl ketone, 0.5 to 3 percent of trimethylbenzoyl-diphenyl phosphine oxide, 1 to 3 percent of acrylate flatting agent, 0.2 to 1.2 percent of polyurea modified polyurethane rheological agent and 5 to 15 percent of trimethylolpropane triacrylate. According to the UV matte finishing paint disclosed by the invention, through compounding of ternary resin and enhancement of nano silicon dioxide, a rigid and tough cross-linked network is constructed, a paint film is free of cracks when being bent at 180 degrees, the adhesive force reaches grade 0, and a coating is resistant to acid and alkali etching liquid and free of corrosion by cooperating with a silane coupling agent and a light stabilization system, and the color difference is delta Elt after the UV matte finishing paint is subjected to high temperature of 260 DEG C; and 1.5, the anti-yellowing performance is excellent.

The invention discloses a preparation method of silicone rubber and the silicone rubber, and belongs to the field of silicone rubber. The preparation method comprises the following steps: dispersing fumed silica in an acid solution to obtain a fumed silica solution, dispersing chitosan in a dilute acid solution to obtain a chitosan solution, mixing the fumed silica solution and the chitosan solution, stirring, centrifuging, washing and drying to obtain a coated product; mixing the coated product, magnesium hydroxide, raw rubber, a cross-linking agent, a vulcanizing agent and a catalyst, heating and kneading, and vacuumizing to obtain initial silicone rubber; the preparation method comprises the following steps: dissolving 1-hydroxycyclohexyl phenyl ketone into an organic solvent to obtain a solution A, mixing acrylic acid, phenyl bis (2, 4, 6-trimethylbenzoyl) phosphine oxide and titanium dioxide to obtain a solution B, soaking initial silicone rubber into the solution A, taking out, airing, soaking into the solution B, and carrying out ultraviolet curing, cleaning and airing to obtain the silicone rubber. The heat-conducting property, the mechanical property and the wet friction property of the silicone rubber are greatly improved.

The invention belongs to the technical field of UV visbreaking polymers, and particularly relates to a UV visbreaking film and a preparation method thereof. Wherein the UV viscosity-reducing film sequentially comprises a base film (1), a first viscosity-reducing adhesive layer (5), a second viscosity-reducing adhesive layer (4) and a release film (3) from bottom to top, the first viscosity-reducing adhesive layer (5) and the second viscosity-reducing adhesive layer (4) both comprise a photoinitiator, the photoinitiator in the first viscosity-reducing adhesive layer (5) is 1-hydroxy-cyclohexyl phenyl ketone, and the content of the photoinitiator in the formula of the adhesive layer is 0.1%-10% by mass; a photoinitiator in the second viscosity-reducing adhesive layer (4) is bis (2, 4, 6-trimethylbenzoyl) phenyl phosphine oxide, and the content of the photoinitiator in the adhesive layer formula is 0.1-10% by mass; in the preparation method, ultraviolet irradiation precuring is carried out, so that the UV viscosity-reducing film has light selectivity and high cohesion strength, and the residual adhesive is remarkably reduced.

A UV curable inkjet ink including a free radical polymerizable compound and an acyl phosphine oxide initiator wherein the acyl phosphine oxide initiator includes an acyl group selected from the group consisting of a benzoyl group substituted by an urea group or an oxalylamide group; a 2,6-dimethyl benzoyl group substituted in position 3 by an urea group or an oxalylamide group; a 2,6-dimethoxy benzoyl group substituted in position 3 by an urea group or an oxalylamide group; a 2,4,6-trimethyl benzoyl group substituted in position 3 by an urea group or an oxalylamide group; and a 2,4,6-trimethoxybenzoyl group substituted in position 3 by an urea group or an oxalylamide group wherein the urea group and the oxalylamide group include a tertiary amine group positioning a phosphorus atom of the acylphosphine oxide initiator in a 1 to Z position, where position 1 is defined as that of the phosphorus atom and position Z is defined as the nitrogen atom of the tertiary amine group with Z representing an integer of at least 11; and that the acyl phosphine oxide initiator contains no more than two photoinitiating moieties having a phosphine oxide group.

The invention relates to the field of filter materials, and discloses a denitration catalyst-loaded filter bag and a preparation method thereof, the filter bag comprises interface modifier impregnated modified polytetrafluoroethylene fiber and a catalytic additive loaded on the modified polytetrafluoroethylene fiber, the interface modifier is prepared by carrying out hydrolysis-polycondensation on ethyl orthosilicate, perfluorooctyl ethyl trimethoxy silane, trimethyl borate and 3-(2, 3-epoxypropoxy) propyl trimethoxy silane, and the interface modifier is prepared by carrying out hydrolysis-polycondensation on ethyl orthosilicate, perfluorooctyl ethyl trimethoxy silane, trimethyl borate and 3-(2, 3-epoxypropoxy) propyl trimethoxy silane; the catalytic additive is prepared by using polyether PluronicF127, 1, 3, 5-trimethylbenzene and dopamine as raw materials through emulsion-induced interface assembly and externally introducing mesoporous silica to prepare a hollow spherical catalyst carrier, then loading cerium and manganese precursors onto the surface of the hollow spherical catalyst carrier, and coating with a titanium dioxide shell layer. The filter bag prepared by the invention has good denitration activity, sulfur resistance, water resistance, hydrophobicity and friction resistance.

The present application discloses an antibacterial hydrogel dressing with integrated constant temperature photothermal effect and controlled drug release function, as well as its preparation method and application, which belongs to the field of medical biomaterial technology. The antibacterial hydrogel dressing with integrated constant temperature photothermal effect and controlled drug release function provided by the present application includes: a dressing and an antibiotic drug compounded on the dressing; the dressing is woven from photothermal water gel fiber and thermosensitive hydrogel fiber; the photothermal water gel fiber is made of photothermal dye, proton donor and phase change material as the core layer and sodium alginate as the shell layer; the thermosensitive hydrogel fiber is made of N-isopropyl acrylamide, methylene bisacrylamide, phenyl-2,4,6-trimethylbenzoyl lithium phosphinate and sodium alginate. The hydrogel dressing prepared by the present application has an inherent temperature control mechanism, can release drugs on demand and in a concentrated manner, has excellent antibacterial effect, and has broad application prospects in the preparation of biomedical materials.

The present invention relates to a novel polymorph of (1R,2R,3aS,3bR,10aS,10bR,11S,12aS)-5,10b-difluoro-1-(((fluoromethyl)thio)carbonyl)-11-hydroxyl-2,10a,12a-trimethyl-7-phenyl-1,2,3,3a,3b,7,10,10a,10b,11,12,12a-dodecylhydrocyclapenta[5,6]napththo[1,2-F]indazole-1-furan-2-carboxylate ester as shown in formula (I), a preparation method therefor, and a use thereof. The crystal form of the present invention has characteristics such as a significant pharmaceutical effect, good stability, high yield, and high purity, and is beneficial for the selection and design of a drug administration route and the determination of a drug preparation process parameter, thereby improving drug production quality.

The application discloses an organic compound biological probe and a preparation method and application thereof, and belongs to the field of fluorescent probes. The structural formula of the organic compound biological probe is as follows, and the preparation method comprises the following steps: adding 2,4-dihydroxybenzaldehyde and anhydrous potassium carbonate into anhydrous acetonitrile or DMF, then dropwise adding 1,4-dibromobutane to obtain a colorless oily compound 1 through reflux reaction; dissolving the compound 1 and triphenylphosphine in anhydrous acetonitrile to obtain a solid compound 2 through reflux reaction; dissolving 1,1,2-trimethyl-1H-benzo[e]indole and iodoethane in anhydrous acetonitrile to obtain a compound 3 through reflux; dissolving the compound 3 and the compound 2 in anhydrous ethanol, adding piperidine, and then performing reflux reaction and purification to obtain the organic compound biological probe. The organic compound biological probe can self-assemble into nanoparticles with a size of about 1.6 nm in water, has strong anti-photobleaching ability, and integrates red light and near-infrared dual-channel imaging, pH detection, mitochondrion targeting and chemotherapy.

The invention discloses an industrial packaging coating integrating anti-counterfeiting, antibacterial and pathogen detection functions and a preparation method thereof, and relates to the technical field of industrial packaging coatings. The coating is prepared from modified polyurethane acrylate, ethyoxyl ethyoxyl ethyl acrylate, 1, 6-hexanediol diacrylate, hydroxyethyl methylacrylate, trimethylolpropane triacrylate, epsilon-polylysine, carbon quantum dot-microencapsulated spiropyrane, a water-based flatting agent, 2, 4, 6-trimethyl-1, 3-pentanediol diacrylate, a water-based curing agent, a defoaming agent, a defoaming agent and a solvent. The cleaning agent is prepared from 2, 4, 6-trimethylbenzoyl diphenyl phosphine oxide, a dispersing agent, lauryl sodium sulfate, pathogen microcapsules and ethyl acetate. The three functions of anti-counterfeiting, antibiosis and pathogen detection are integrated into a single coating, the limitation that a traditional packaging material is single in function is broken through, the anti-counterfeiting reliability is improved, no harmful substance is migrated out, and efficient pathogen screening is achieved; safety standards are met, harmful substance migration is avoided, and the base material is matched with various base materials such as films and fibers and is mechanically strengthened.

The invention relates to the technical field of organic synthesis, and discloses a preparation method of trimethylbenzoquinone, which comprises the following steps: mixing a reaction solution containing unsym-trimethylbenzene and an organic solvent with a catalyst, and adding an oxidizing agent to carry out oxidation reaction to obtain trimethylbenzoquinone, wherein the catalyst comprises a pyridine compound and methylrhenium trioxide. According to the method, the unsym-trimethylbenzene is adopted as a raw material, the methylrhenium trioxide and the pyridine compound are adopted as catalysts, the trimethylbenzoquinone is prepared through oxidation of the oxidizing agent, the product yield is high, and the consumption of the oxidizing agent is low.

This invention discloses a photosensitive supramolecular fluorescent polymer, its preparation method, and its anti-counterfeiting application in water, using trifluoroethyl methacrylate, hexafluorobutyl acrylate, 4-(acryloyloxy)butyl4-(2-methyl-3-(2-(2-methylbenzo[b]thiophen-3-yl)-4-oxo-5,6-2H-4H-thiaran[2,3-)b]thiaran-3-yl)benzo[b]thiophen-6-yl)-4-oxobutyrate, 4 This polymer was prepared by a simple one-step free radical copolymerization method using 1,1-(acryloyloxy)butyl3-(3,3,4,4,5,5-hexafluoro-2-(2-methyl-1,1-dioxide benzo[b]thiophene-3-yl)cyclopent-1-en-1-yl)-2-methylbenzo[b]thiophene-6-carboxylate 1,1-dioxide and phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide (photoinitiator-819) as raw materials. The polymer exhibits excellent multicolor light-switching performance, high stretch ratio, high self-healing efficiency, strong substrate adhesion, and antifouling properties, especially demonstrating excellent stability under strong acid, strong alkali, and high salt environments. The synthetic route is simple, and it has great application potential in underwater anti-counterfeiting and encryption technologies.

The invention relates to a calcipotriol nano-composite, difunctional integrated hydrogel for treating psoriasis as well as preparation and application of the difunctional integrated hydrogel. The preparation method comprises the following steps: loading calcipotriol on amino-modified mesoporous silica, and then carrying out a one-pot reaction on the amino-modified mesoporous silica, methacrylated gelatin, dopamine methacrylamide, sodium pirolinate carboxylate and phenyl (2, 4, 6-trimethylbenzoyl) lithium phosphate to obtain the difunctional integrated hydrogel. The hydrogel disclosed by the invention is UV-responsive drug-loaded hydrogel, can be quickly cross-linked and adhered to the surface of skin after being irradiated by UV, has the properties of high light transmission, drug sustained release, moisture retention and stable structure, and meets the clinical requirements of synchronous and integrated drug treatment and UV irradiation while remarkably improving the bioavailability of an externally applied drug; organic combination and mechanism complementation of two treatment modes are realized, so that the psoriasis is treated more efficiently.

The present invention belongs to the field of photodynamic therapy technology, and more particularly to a BODIPY compound, a preparation method and its use as a photosensitizer. The present invention provides a series of novel small molecule compound photosensitizers with BODIPY dimer as basic skeleton and pure type I photodynamic. By the combined action of heavy atoms, 2,4,6-trimethylphenyl groups and limited structure R groups introduced at specific positions, the reactive oxygen species yield is increased, and the regulation of pure type I photosensitizer is carried out by regulating energy levels. Compared with common photosensitizer molecule indocyanine green (ICG), the reactive oxygen species yield is about 50 times that of ICG, has higher photothermal stability, can significantly increase the applicability of photodynamic agents, and the preparation method is simple, the reaction efficiency is high, the yield is high, and there is good industrial application prospect.

A preparation method of the methacrylated gelatin with the dual functions comprises the following steps: firstly, preparing collagen methylated polymethacrylate, then mixing 5% of collagen methylated polymethacrylate, 0.2% of trimethylbenzoyl phosphonate, 10 mg / ml of a herba houttuyniae extract and 20 micrograms / ml of nifedimab, and carrying out uniform mixing, so as to obtain the methacrylated gelatin with the dual functions, the collagen methylated polymethacrylate and the trimethylbenzoyl phosphonate, the herba houttuyniae extract, the nifedimab and the collagen methylated polymethacrylate, the herba houttuyniae extract and the nifedimab. The methacrylated gelatin is prepared under ultraviolet irradiation, and the loose cross-linked network structure of the methacrylated gelatin can realize continuous release of drugs, so that the demand of continuous and stable drug delivery is met; in addition, the gelatin methacrylamide, the herba houttuyniae extract and the nintedanib are combined to relieve hemorrhagic intestinal adhesion and can regulate inflammation and anti-fibrosis functions.

The present invention discloses a hydrogel material for antibacterial and tissue repair and its preparation method and application, which belongs to the field of biomedical material technology. The preparation method of the hydrogel material includes: deionized water dissolving phenyl (2,4,6-trimethylbenzoyl) lithium phosphate, heating in a water bath under a light-proof environment, obtaining a photoinitiator solution, adding phenylboronic acid grafted methacryloyl gelatin, heating and fully dissolving, obtaining a bio-ink precursor A; polyvinyl alcohol is added to the photoinitiator solution, heated and stirred and fully dissolved, obtaining a bio-ink precursor B, adding magnesium manganese doped vacancy bismuth oxide nanomaterial and mixing evenly, obtaining a bio-ink precursor C, mixing with the bio-ink precursor A, and the obtained mixed bio-ink is formed by injection extrusion and light curing. The hydrogel material of the present invention can increase ROS production and enzyme-like activity, realize antibacterial sequential treatment, and has important application potential in promoting the repair of infected tissues.

The present invention relates to the manufacturing of dimethylphenols, particularly 2,5-dimethylphenol, respectively trimethylphenols, particularly 2,3,6-trimethylphenol, from 2,5-dimethylfuran and acetylene, respectively propyne, particularly in MAP gas, in the presence of a platinum catalyst. This invention offers a sustainable synthesis of β-tocopherols, respectively α-tocopherols.

The invention discloses an odorless scratch-resistant elastic bending UV (ultraviolet) excimer skin-touch varnish, which relates to the technical field of coatings and comprises the following components in percentage by mass: 10-30% of functional acrylate resin, 10-30% of a solvent, 10-30% of a solvent, 10-30% of a solvent and 10-30% of a solvent. 40 to 80% of modified polyurethane acrylate resin; 0.1-1% of a leveling agent; 0.1-1% of a defoaming agent; 0.1-4% of an organosilicon auxiliary agent; 0.5 to 2% of 2, 4, 6-trimethylbenzoyl diphenyl phosphine oxide; 0.5 to 7% of 2-hydroxy-4 '-(2-hydroxyethoxy)-2-methyl propiophenone, and the balance of water; 0.3-1% of a wetting dispersant; 2-5% of UV anti-settling slurry; 1-5% of wax powder; and 5-30% of nano sol. According to the UV quasi-molecular skin-touch varnish disclosed by the invention, through the combined action of an odorless resin system, fluorosilicone modified and enhanced three-functional-group elastic resin, nano-zirconia phase change toughening and a crosslinkable fixing auxiliary agent, multiple pairs of performance contradictions of elasticity and hardness, instant effect and durability, odorless effect and stability and the like in a traditional elastic bending UV coating are successfully solved; and the high-performance skin-touch coating with excellent elastic bending property, lasting high scratch resistance, real odor removal effect and good stability is obtained.

The invention discloses a mass spectrometric detection method for C3-alkylphenol separated by an acetonitrile-ammonia water mobile phase and application, and relates to the technical field of environmental detection.The mass spectrometric detection method comprises the steps that according to the petroleum content range in a sample, a corresponding sample pretreatment process is selected to prepare a sample; the method comprises the following steps: detecting a standard sequence sample, a conversion factor calibration sample and a sample by utilizing LC-HRMS (Liquid Chromatography-High Resolution Mass Spectrometry) under an acetonitrile-ammonia water mobile phase system, and simultaneously collecting MS1 data and MS2 data; calculating the standardized concentration of the first component and the concentration of the second component which flow out together according to the MS1 data; calculating the concentration of propyl phenol according to the MS2 data; according to the MS1 data of the co-outflow single component, calculating the conversion factor of the co-outflow first component, and calculating the concentration of trimethylphenol by combining the standardized concentration of the co-outflow first component and the concentration of propyl phenol. The detection limit of the method for 12 C3-alkyl substituted phenol isomeride single components is lower than 1.0 [mu] g / L, the adding standard recovery rate is 77-103%, the sensitivity is high, and the accuracy is good.

The invention provides a solvent-free oxidative coupling method for preparing 2, 2 ', 3, 3', 5, 5 '-hexamethyl biphenyl (HMBP), the method comprises the following steps: in the presence of a metal salt catalyst and an amine auxiliary agent, trimethylphenol is subjected to oxidative coupling to obtain 2, 2', 3, 3, 5, 5 '-hexamethyl biphenyl, the catalyst is selected from one or more of the following groups: salts of iron, copper, cobalt, nickel and zinc; and / or the amine auxiliary agent is selected from one or more of the following groups: organic amine and ammonia water.

The invention relates to light-cured 3D printing glass and a preparation method thereof. The light-cured 3D printing glass is characterized by being prepared from the following raw materials in percentage by weight: 65-70wt% of micro-nano glass powder and 30-35wt% of a resin raw material, wherein the resin is prepared from the following raw materials in percentage by weight: 40 to 55 percent of hydroxyethyl methacrylate (HEMA), 25 to 40 percent of bisphenol A diacrylate, 13 to 25 percent of 1, 6-hexanediol diacrylic acid (HDDA), 3 to 10 percent of diethyl phthalate (DEP), 0.5 to 2.5 percent of phenyl bis (2, 4, 6-trimethylbenzoyl) phosphine oxide and 0.3 to 1.5 percent of dispersing agent; wherein the ratio of HEMA to bisphenol A diacrylate is defined as 1: 0.45-1: 1, the ratio of bisphenol A diacrylate to HDA is defined as 1: 0.3-1: 0.9, and the ratio of HDA to DEP is defined as 1: 0.15-1: 0.7. The light-cured 3D printing glass slurry has the advantages that after the light-cured 3D printing glass slurry prepared by the invention is printed and sintered by a DLP method, the glass density is greater than or equal to 96%, the curing shrinkage rate is less than or equal to 4%, the shrinkage rate after sintering is less than or equal to 15%, the bending strength reaches up to 110 MPa, and the transmittance is greater than or equal to 85%.

The invention discloses a preparation method and application of a functional degradable soybean oil-based bionic porous composite bone scaffold. The method comprises the following steps: taking epoxidized soybean oil acrylate as a bio-based base material, compounding isobornyl methacrylate to improve the defects of high viscosity and low photosensitivity of the bio-based base material, adding a photoinitiator containing ethyl 2, 4, 6-trimethylbenzoyl phenyl phosphonate and phenyl bis (2, 4, 6-trimethylbenzoyl) phosphine oxide, compounding, and carrying out aging treatment to obtain base resin; mixing calcium lignosulphonate into the base resin to prepare composite photosensitive resin, and printing a triple-period extremely-small curved surface structure through a digital light processing technology and a 3D printing technology to finally obtain the functional degradable soybean oil-based bionic porous scaffold. The scaffold has calcium lignosulphonate-mediated controllable photo-thermal response behaviors of near-infrared light illumination regulation and bone scaffold component dependence under the condition of simulating the in-vivo environment of a human body, so that a controllable photo-thermal response-mediated remote shape memory function is realized, and meanwhile, a mild, safe and controllable photo-thermal curative effect can also be realized. Besides, calcium lignosulphonate promotes degradation of the composite scaffold by preferentially dissolving and generating a microporous structure on the surface of a matrix while improving the hydrophilic performance of the scaffold, and continuously releases calcium ions, so that the scaffold shows enhanced biomineralization ability and promotes cell proliferation and osteogenic differentiation. The research provides a solution with potential for the soybean oil-based biological photosensitive material in the digital light processing preparation technology and the multi-functional application of the bionic porous bone scaffold so as to deal with complex and irregular bone defects.

A radiation-curable ink jet ink composition includes a hydroxyl group-containing monofunctional monomer and / or an ether cyclic structure-containing monofunctional monomer, a nitrogen-containing heterocyclic structure-containing monofunctional monomer, a bifunctional monomer, and a polymerization initiator, in which the bifunctional monomer includes a vinyl ether group-containing (meth)acrylate represented by Formula (1), a content of the vinyl ether group-containing (meth)acrylate is 20% by mass or greater with respect to a total amount of the ink composition, and the polymerization initiator includes ethyl phenyl(2,4,6-trimethylbenzoyl)phosphinate.H2C═CR1—CO—OR2—O—CH═CH—R3  (1)

A radiation curable ink composition for ink jet according to one embodiment of the present disclosure contains a polymerizable compound and a photopolymerization initiator, where the photopolymerization initiator includes (2,4,6-trimethylbenzoyl)bis(p-tolyl)phosphine oxide, a content of the (2,4,6-trimethylbenzoyl)bis(p-tolyl)phosphine oxide is 3% by mass or more with respect to a total amount of the ink composition, the polymerizable compound includes a monofunctional polymerizable compound, and a content of the monofunctional polymerizable compound is 70% by mass or more with respect to a total amount of the polymerizable compound.

A radiation curable ink jet composition includes polymerizable compounds and a photopolymerization initiator, the polymerizable compounds include a monofunctional monomer, a content of the monofunctional monomer with respect to a total mass of the polymerizable compounds is 90 percent by mass or more, and the photopolymerization initiator includes ethyl (2,4,6-trimethylbenzoyl)phenylphosphinate.

The invention discloses a novel photoinitiator as well as a preparation method and application thereof, a thiophenol group substituted by methyl, ethyl or isopropyl is introduced into a molecular structure of the photoinitiator, so that the absorption wavelength of the photoinitiator is adaptive to a UV-LED light source of 365-405nm, and the problem that the existing photoinitiator is insufficient in matching with the UV-LED light source is solved. The preparation method comprises the following steps: carrying out acylating chlorination on 2, 4, 6-trimethylbenzoyl phenylphosphonic acid through thionyl chloride, condensing the 2, 4, 6-trimethylbenzoyl phenylphosphonic acid and substituted p-thiophenol in an organic solvent, and purifying to obtain a target product, and the preparation process is simple and convenient to operate and suitable for industrial production. The obtained photoinitiator shows good compatibility and efficient curing efficiency in a UV-LED photocuring system, can be widely applied to the fields of printing ink, photocureable coatings, UV adhesives and the like, and has important significance in promoting popularization of a UV-LED curing technology.

This invention provides a method for preparing phenyl-substituted 2-methyl-1H-indene derivatives via Stille coupling reaction, comprising: reacting brominated 2-methyl-1H-indene, trialkylphenyltin, palladium catalyst, and additives in an organic solvent; and after post-treatment following reaction to obtain the phenyl-substituted 2-methyl-1H-indene derivatives; wherein the trialkylphenyltin is at least one of trimethylphenyltin and tributylphenyltin; the palladium catalyst is at least one of Pd(PPh3)4, Pd2(dba)3, and Pd(dba)2; the additive is at least one of lithium chloride, cesium fluoride, and potassium fluoride; and the organic solvent is at least one of DMF, 1,4-dioxane, and NMP. This invention uses brominated 2-methyl-1H-indene and trialkylphenyltin as raw materials, and prepares the target product by reaction in an organic solvent in the presence of a palladium catalyst and additives. It exhibits good substrate adaptability and is simple to operate.

The invention discloses a method for detecting flavor substances in a tobacco extract, which comprises the following steps: adding a sample into a headspace bottle by adopting a headspace solid-phase microextraction-GC / MS (Gas Chromatography-Mass Spectrometer) combined method, then adding a saturated chloride aqueous solution, sealing and uniformly shaking, and then detecting by adopting a solid-phase microextraction-GC / MS combined instrument. According to the method, the saturated chloride is added to dilute the sample to increase the ion concentration in the solution, so that volatile aroma substances are promoted to be separated out from the sample, and the one-time detection sensitivity of the three aroma substances including terpinene, 1, 1, 6-trimethyl-1, 2, 3, 4-tetrahydronaphthalene and (E)-1-(2, 3, 6-trimethylphenyl) butyl-1, 3-diene is higher.

The present invention addresses the problem of providing an active energy ray-curable inkjet printing ink composition containing (2,4,6-trimethylbenzoyl)bis(p-tolyl)phosphine oxide as a photopolymerization initiator, the active energy ray-curable inkjet printing ink composition having sufficiently enhanced curability and preferably yielding a cured product having improved solvent resistance. As a solution, there is provided an active energy ray-curable inkjet printing ink composition having a viscosity of 5-80 cps at room temperature, wherein the ink composition contains 10 mass% or more of a monofunctional monomer with respect to the ink composition, 1-15 mass% of an amine-modified oligomer with respect to the ink composition, and (2,4,6-trimethylbenzoyl)bis(p-tolyl)phosphine oxide, and the ink composition contains a sensitizer when further containing a black pigment.

The invention provides white photocuring ink-jet ink and a preparation method thereof, and belongs to the technical field of ink-jet ink. The white photocuring ink-jet ink is prepared from the following components in parts by mass: 30 to 60 parts of monofunctional photocuring monomer, 10 to 20 parts of polyfunctional acrylate monomer, 5 to 25 parts of white pigment, 5 to 15 parts of photoinitiator composition and 0 to 15 parts of resin, wherein the photoinitiator composition is prepared from a compound of a light elimination type ketoxime ester photoinitiator and 2, 4, 6-trimethylbenzoyl phenyl ethyl phosphonate, and the photoinitiator composition is prepared from a compound of a light elimination type ketoxime ester photoinitiator and 2, 4, 6-trimethylbenzoyl phenyl ethyl phosphonate. According to the invention, the light elimination type ketoxime ester photoinitiator and the 2, 4, 6-trimethylbenzoyl phenyl ethyl phosphonate are compounded for use, and the synergistic effect of the photoelimination type ketoxime ester photoinitiator and the 2, 4, 6-trimethylbenzoyl phenyl ethyl phosphonate improves the photosensitive efficiency, the deep curing performance and the surface drying performance of the white photocuring ink-jet ink, and the white photocuring ink-jet ink is not easy to yellow.