78 results about "Thioxanthone" patented technology

The invention discloses a preparation method and application of a PDMS photoresist based on femtosecond laser two-photon polymerization. The feasibility of a photoresist formula is verified through micro-nano structure processing. The preparation method of the photoresist comprises the following steps: dissolving isopropyl-9H-thioxanthone and 2-isopropyl thioxanthone in tetrahydrofuran, so as to form a photoinitiator solution; then mixing the PDMS precursor with a photoinitiator solution, stirring for 12 hours in a dark place to ensure the uniformity, and removing bubbles through THF evaporation and ultrasonic treatment to finally obtain the high-quality PDMS photoresist. According to the method, by accurately controlling the ratio of the photoinitiator to the PDMS, the photosensitivity and the processability of the photoresist are remarkably improved. And in combination with a femtosecond laser two-photon polymerization technology, micro-nano processing of a high-resolution (submicron-level) three-dimensional complex structure is realized, and the method is suitable for the fields of micro-fluidic chips, biomedical devices, optical devices and the like.

The invention discloses a disubstituted oxygen / thioxanthone efficient visible light initiator and a preparation method of the disubstituted oxygen / thioxanthone efficient visible light initiator. Meanwhile, the invention discloses a preparation method of the novel disubstituted oxygen / thioxanthone efficient visible light initiator. The prepared disubstituted oxygen / thioxanthone efficient visible light initiator is used as a photoacid generator molecule to be applied to a photoinitiator of a prepolymer containing mercaptan-olefin free radical photopolymerization system. The structural formula of the disubstituted oxygen / thioxanthone efficient visible light initiator is shown in the specification.

Latent photoinitiator compounds are described, as well as compositions containing such compounds and their uses in photoinitiated methods for producing photoresist structured.

The invention discloses a photostimulation response material which is characterized in that a < 7 > H-benzo [c] carbazole group or a < 7 > H-dibenzo [c, g] carbazole group is connected to the site 2 of 9-thioxanthone to construct a thioxanthone derivative, and the thioxanthone derivative is doped in a polymethyl methacrylate matrix to form a composite film, so that the photostimulation response material has a remarkable photostimulation response characteristic; the light color of the film is changed after the film is subjected to ultraviolet radiation for 10 seconds, afterglow emission of s level appears, and the film can be applied to the technical field of information encryption and security anti-counterfeiting.

A process for the preparation of a compound of the sterically hindered alkoxyamine class is described, the process comprises the step of alkylating a sterically hindered hydroxylamine compound to a corresponding sterically hindered alkoxyamine by reacting said sterically hindered nitroxyl compound with a compound capable of producing a carbon-central alkyl radical, typically a territorial or secondary alkyl radical, the compounds capable of generating carbon-center alkyl radicals are selected from thermal radical initiators that form radical species in the temperature range of 40 DEG C to 200 DEG C, and from photoinitiators that undergo light excitation when irradiated with UV light or visible light in the range of 180 to 700 nm, in particular UV light in the range of 180 to 380 nm, the compounds capable of generating carbon center alkyl radicals are typically selected from the class of organic peroxides, azo compounds, benzoyl derivatives, benzophenone derivatives, thioxanthone derivatives, benzoin derivatives, benzoyl phosphine oxide derivatives, and the like. The invention relates to a peroxide, for example, selected from the group consisting of diacyl peroxides of formula (A), peracid esters of this formula (A), and oxalic acid peracid esters of formula (D) R-CO-O-O-Z-R (A), r-Z ''-X-CO-CO-O-O-Z''-R (D) wherein each R independently represents a primary or secondary alkyl or cycloalkyl group, preferably comprising from 1 to 15 carbon atoms, and X is oxygen-O-or peroxy-O-O-, Z represents CO or an alkylene group bonded to a quaternary carbon atom, the quaternary carbon atom being an alkylene group of formula (C) R '-C-R' (C), wherein each R'is selected from alkyl groups having 1 to 15 carbon atoms, and Z "represents the alkylene group bonded to a quaternary carbon atom having the formula (C). The described process produces the corresponding O-alkylated derivatives of the sterically hindered hydroxylamines, typically compounds of the class referred to as N-O-alkyl HALS, with very high selectivity and conversion and without the need for the use of catalysts, in particular metal catalysts.

To provide an active energy radiation-hardenable inkjet ink which has excellent internal curability of the ink and which can be suppressed in yellowing during image formation, and to provide an image forming method.SOLUTION: Active energy radiation-hardenable inkjet ink is provided, containing a polymerizable compound, a polymerization initiator, and a gelling agent. The active energy radiation-hardenable inkjet ink includes at least one trifunctional monomer as the polymerizable compound, the content of the trifunctional monomer is more than 20 mass% relative to the active energy radiation-hardenable inkjet ink, and the active energy radiation-hardenable inkjet ink includes at least a thioxanthone-modified acrylate as the polymerization initiator.SELECTED DRAWING: Figure 1

The invention relates to a super-crosslinking photosensitive material as well as a preparation method and application thereof. According to the photosensitive material, photosensitive molecules such as 2, 4, 5, 6-tetra (9-carbazolyl)-isophthalonitrile, 1, 3-dicyano-2, 4, 5, 6-tetra (diphenylamino)-benzene, anthraquinone, thioxanthone and the like are used as a basic structural unit as a skeleton; according to the preparation method, p-xylylene dichloride, 1, 4-di (bromomethyl) benzene, 1, 3, 5-tri (bromomethyl) benzene or biphenyl xylylene dichloride is used as a cross-linking agent, and photosensitive molecules are bonded with the cross-linking agent to obtain the super-crosslinked photosensitive material with the photosensitive property. The photosensitive material is applied to the asymmetric alpha-hydroxylation reaction of beta-keto ester, and an asymmetric alpha-hydroxylation reaction process with oxygen as an oxidizing agent is developed. The method provided by the invention is environment-friendly and has relatively high stereoselectivity.

The invention relates to the field of ink preparation, in particular to a UV curing ink coating composition and a preparation method thereof. The composition is prepared from the following components: 40 to 66 parts of polyurethane acrylate, 8 to 30 parts of monoacrylate, 4 to 6 parts of 2-isopropyl thioxanthone, 1 to 7 parts of ethyl 4-methylaminobenzoate, 1 to 3 parts of oxidized polyethlene wax, 10 to 15 parts of carbon black, 1 to 2 parts of a stabilizer, 5 to 8 parts of a photoinitiator, 1 to 1.2 parts of a flatting agent, 0.4 to 0.8 part of a de-foaming agent and 1 to 3 parts of a dispersing agent. The stability of the ink is improved by classifying the components according to attributes, adopting a means of mixing and dispersing for multiple times, detecting intermediate products and finished products, including particle size agglomeration state, distribution state, viscosity, Zeta potential and surface tension value, and dynamically optimizing the preparation process.

The invention relates to a pyrrolidinyl bifunctional catalyst bonded with a photosensitizer as well as a preparation method and application of the pyrrolidinyl bifunctional catalyst. The catalyst has a structure of a nitrogen four-tooth chiral center and a thioxanthone photosensitive structural unit; according to the preparation method, a chiral tetradentate ligand and a photosensitizer are bonded through a chemical bond and then complexed with metal salt, and the metal complex catalyst with a chiral catalytic center and a photocatalytic center is obtained. The catalyst is applied to an asymmetric epoxidation reaction of chalcone, and an asymmetric epoxidation reaction process taking oxygen as an oxidizing agent is developed. The method provided by the invention is environment-friendly and has relatively high stereoselectivity.

The invention discloses a benzophenone photoinitiator. The structure of the benzophenone photoinitiator is shown as a formula (I) or a formula (II): (I) and (II), wherein Rn is single substitution or multi-substitution on a benzene ring, and Rn is selected from one of hydrogen atom, alkyl, N-alkyl, O-alkyl, S-alkyl, Se-alkyl, Si-alkyl, aromatic ring group and acyloxy. The photoinitiator not only has a benzophenone structure, but also has a part of thioxanthone structure, so that compared with traditional benzophenone photoinitiators and thioxanthone photoinitiators, the photoinitiator is more excellent in ultraviolet absorptivity, photo-initiation efficiency, solubility and the like, is more environment-friendly, is wider in application range, and can be widely applied to the field of photoinitiators. The raw materials are easy to obtain, the production cost is low, and industrial production and application are facilitated.

The application discloses a preparation method of azirin analogs. The preparation method is as follows: taking 2-vinylaniline compounds as starting materials, directly irradiating under 350nm-380nm light, or taking 9-thioxanthone as a photocatalyst, irradiating under 380nm-410nm blue-violet light, and reacting the starting materials in an organic solvent to obtain azirin analogs through purification. The azirin analogs can be efficiently prepared in one step. The reaction condition is mild, the process is simple, the operation is convenient, the photocatalyst and the starting materials are cheap and easy to obtain, the obtained product can be used as a skeleton of a catalyst, and various new catalysts or ligands can be developed, which has important significance for the research and development of catalysts.

The invention provides advertisement inkjet UV ink for a PVC soft film and a preparation method thereof.The advertisement inkjet UV ink for the PVC soft film comprises an active diluting monomer, color paste and photoinitiators, the photoinitiators comprise the first photoinitiator and the second photoinitiator, the first photoinitiator is diphenyl-(2, 4, 6-trimethylbenzoyl) phosphorus oxide, the second photoinitiator is 2, 4, 6-trimethylbenzoyl) phosphorus oxide, and the active diluting monomer is an acrylic monomer. The content of the photoinitiator is 7%-10% in percentage by mass, and the content of the 2, 4-diethyl thioxanthone is 10%-20% in percentage by mass; the color paste is different in color, the content ratio of the first photoinitiator to the content ratio of the second photoinitiator are different, and when the color paste is black, the content ratio of the first photoinitiator to the content ratio of the second photoinitiator is (8-9): 2; when the color paste is cyan or magenta, the content ratio of the first photoinitiator to the second photoinitiator is (7-8): (0.1-1); when the color paste is yellow, the content ratio of the first photoinitiator to the second photoinitiator is 8: (1-2). The problems that existing UV ink cannot be completely cured under low light curing energy, and slag falling and white point exposing are prone to occurring are solved.

The invention relates to the field of layer structures, and particularly discloses a high-light-transmittance and high-flexibility hard coating film and a preparation method thereof. The invention discloses a hard coating film with high light transmittance and high flexibility. The first initiator is prepared from polybutadiene A-polyurethane-acrylate resin, polybutadiene B-polyurethane-acrylate resin, high-transmittance nano particle-acrylate composite resin and a second initiator, and the second initiator is prepared from 2-methyl-1-(4-methylthiophenyl)-2-morpholine-1-acetone and 2-isopropyl thioxanthone. The hard coating film obtained by the invention has a layer structure and has the double characteristics of high light transmittance and high flexibility, the pencil hardness is not lower than 3H, the elongation at break is not lower than 4.9%, the light transmittance is not lower than 92.5%, the toughness value is not lower than 0.949 MJ / m < 3 >, the application range is wide, and the hard coating film has high use value.

The invention discloses a method for preparing an oxygen / thioxanthone compound. 2-aryloxy group / sulfanyl aromatic formaldehyde is heated and reacted in the presence of tetrabutylammonium iodide, water, and a solvent to prepare the oxygen / thioxanthone compound. The present invention uses inexpensive and readily available tetrabutylammonium iodide as a catalyst. In the presence of water, the oxygen / thioxanthone compound is efficiently prepared in a one-pot, one-step process by directly annulating the 2-aryloxy group / sulfanyl aromatic formaldehyde. This method has the advantages of not requiring transition metals, having a wide substrate range, low cost, and being environmentally friendly. It avoids the limitations of using hazardous reagents, transition metal catalysts, and multi-step reactions, and is conducive to industrialized production.

The application discloses a photosensitive mass spectrometry probe, a preparation method thereof and application thereof in mass spectrometry detection, and belongs to the technical field of organic chemistry and analytical chemistry. The photosensitive mass spectrometry probe is constructed by bonding an active reaction group on the basis of thioxanthone oxime phenyl sulfonate structure, and can realize rapid labeling of an analyte and on-line efficient photolysis of a labeled product, so that the labeled product with a sulfonic acid group is released. The application also provides a preparation method of the photosensitive mass spectrometry probe, which is simple and feasible to synthesize the photosensitive mass spectrometry probe with the target structure, and has good guidance and implementability. In the application of the photosensitive mass spectrometry probe in metabolite labeling and mass spectrometry detection, the detection sensitivity is improved, ion suppression effect caused by excessive labeling reagents is reduced, high-throughput and high-sensitivity detection and analysis of low ionization efficiency analytes are realized, and the photosensitive mass spectrometry probe has a wide prospect.

The present invention provides a radiation-curable inkjet ink that has low odor and suitable viscosity and curability for use as an inkjet ink. [Solution] A radiation-curable inkjet ink composition comprising a polymerizable compound, a polymer thioxanthone polymerization initiator, and bis(2,4,6-trimethylbenzoyl)-phenylphosphine oxide, wherein the polymerizable compound does not contain an amine-modified oligomer, or the polymerizable compound contains an amine-modified oligomer, and the content of the amine-modified oligomer is less than 5% by mass of the total amount of the ink composition.

The application belongs to the field of fluorescent sensing, and discloses a sulfur rhodamine peroxynitrite probe containing an indole bottom ring, a preparation method and application thereof. The new compound SR-In of the application is not fluorescent due to PET effect, and generates a new fluorescent substance, thioxanthone, after reacting with peroxynitrite. Since the spectral range of sulfur rhodamine and thioxanthone is completely different, the fluorescent signal can be greatly changed before and after detection, and high-sensitivity detection of peroxynitrite is realized. In addition, the indole bottom ring in the structure of SR-In can only be combined with peroxynitrite and oxidized into thioxanthone, so SR-In does not react with other common active oxygen in the organism, and good peroxynitrite selectivity is shown.

The application belongs to the technical field of photoinitiators and preparation methods, and particularly relates to a preparation method of a macromolecular photoinitiator. The macromolecular photoinitiator is prepared from glycidyl methacrylate, methyl methacrylate, butyl acrylate, hydroxyethyl acrylate, 4-benzoylbenzoic acid, 2-carboxythioxanthone, N,N-dimethylglycine, monomethoxypolyethylene glycol, monohydroxypolycaprolactone and methacrylic acid. In the preparation, a tetra-acrylate polymer containing an epoxy group and a hydroxyl group is first prepared, and then double photoinitiation structure grafting, tertiary amine structure grafting, segment grafting and epoxy closure are sequentially performed, and the feeding amount of each stage is corrected through the initial epoxy value, the first residual epoxy value and the second residual epoxy value. The method connects the benzophenone structure, the thioxanthone structure and the tertiary amine structure to the same polymer molecular chain, reduces the content of unreacted small molecules and the migration and precipitation amount, improves the photocuring gel rate and shortens the surface drying time.

To provide a photoresist composition and a pattern formation method.SOLUTION: A photoresist composition includes: a nonionic thioxanthone compound, a nonionic oxime compound, or a combination of a nonionic thioxanthone compound and a nonionic oxime compound; a polymer comprising a first repeating unit of formula (3) and a second repeating unit of formula (4a); a basic quencher; a photoacid generator; and a solvent. In formula (3), Z is a non-hydrogen substituent including an acid-labile site. In formula (4a), Z2 is a hydrogen atom or a substituted or unsubstituted C1-C5 alkyl group.SELECTED DRAWING: Figure 1D

A kind of high photosensitivity slurry of pure copper photocuring 3D printing and preparation method thereof.The high photosensitivity slurry of pure copper photocuring 3D printing composition includes pure copper powder, active diluent, photoinitiator and auxiliary agent.The active diluent is acrylate monomer, and the photoinitiator includes two groups, one group is cleavage type alpha-amino ketone and its derivative, and the other group is thioxanthone and its derivative group.The thioxanthone photoinitiator has higher molar extinction coefficient in the ultraviolet light around 360nm-405nm wavelength, can compete with copper powder for ultraviolet light to avoid the high light absorption coefficient of copper powder to reduce the light initiation efficiency.At the same time, after thioxanthone absorbs ultraviolet light, energy transfer occurs with alpha-amino ketone, so that alpha-amino ketone photoinitiator jumps to excited triplet state, indirectly realizes slurry photopolymerization, greatly improves the light initiation efficiency, improves the photosensitivity of slurry, and solves the problem of high ultraviolet absorbance of copper powder.

The objective is to provide a polymerization initiator mixture that, when incorporated into a polymerizable composition containing a radical polymerizable compound, yields a cured film with excellent curability under LED lamps and low coloration. [Solution] (a) A polymerization initiator mixture containing a photopolymerization initiator represented by the following formula (1) and a sensitizer, wherein the sensitizer is a compound having a thioxanthone skeleton, The polymerization initiator mixture is characterized in that the content of the sensitizer is 1% by mass or more and less than 30% by mass, based on 100% by mass of the polymerization initiator mixture (a). [Formula 1] JPEG2026121013000010.jpg3064

The present invention relates to a curable composition comprising: a) a cationically polymerizable component, b) a cationic photoinitiator component comprising at least one iodonium salt, c) a photosensitizer component comprising at least one multifunctional halogenated thioxanthone. It further relates to processes for curing such compositions, cured products thus obtained and uses of such products.

The application discloses a method for preparing fluorine-containing diphenylmethane compounds by using sulfur hexafluoride as a fluorination reagent, and belongs to the technical field of organic chemical synthesis. The preparation method comprises the following steps: (1) mixing a photocatalyst, a solvent and a reducing agent, and performing ultrasonic treatment to obtain solution A; mixing a reaction substrate and the solvent to obtain solution B; the photocatalyst is one or more of 4CzIPN, Ir[dF(CF3)ppy]2(dtbpy))PF6, 9-thioxanthone and 10-phenylphenothiazine; the reaction substrate is a compound with a structural formula of R1 and R2 are both H, alkoxy or halogen; (2) mixing the obtained solution A and solution B in a sulfur hexafluoride gas atmosphere, and performing reaction under blue light illumination, and the fluorine-containing diphenylmethane compounds are obtained. The method has the beneficial effects that the fluorine-containing diphenylmethane compounds are efficiently prepared by using sulfur hexafluoride as the fluorination reagent, and by selecting raw materials and catalysts with certain proportions; the reaction raw materials are cheap; the preparation process is safe, mild, has good substrate compatibility and high preparation efficiency.

The present disclosure relates to a photoinitiating composition suitable for UV-LED light irradiation comprising: a) a photoinitiating system suitable for LED light irradiation having a wavelength in the range of 340-420 nm; b) a dispersing medium; wherein the dispersing medium comprises an organic solvent which is miscible with water, wherein the photoinitiating system comprises an α-aminoketone and a photosensitizer having absorption in the wavelength range of 340-420 nm, wherein the photosensitizer comprises thioxanthone or derivatives thereof, and wherein the thioxanthone derivatives are substituted thioxanthone, optionally with alkyl, alkoxy, halogen, carboxyl, ester group, amide group or any combination thereof.

The invention discloses a 3D printing photosensitive resin material based on epoxy resin and a preparation method of the 3D printing photosensitive resin material, and relates to the technical field of 3D printing. The preparation method comprises the following steps: sequentially adding 1, 4-epoxy cyclohexyl methacrylate, 2-hydroxyethyl acrylate, tetraethylene glycol diacrylate, a photoinitiator 819, bis (4-(diphenyl sulfonium) phenyl) thioether-bis hexafluoroantimonate, modified nano titanium dioxide, a photosensitizer and organic silicon epoxy resin into a reaction container, carrying out ultrasonic dispersion, uniformly mixing, and carrying out cryopreservation to obtain the 3D printing photosensitive resin material. The modified nano titanium dioxide is prepared by coating the modified nano titanium dioxide with 2-isopropyl thioxanthone; the photosensitizer is a thioxanthone derivative. The 3D printing photosensitive resin material prepared by the preparation method disclosed by the invention has excellent mechanical properties and low volume shrinkage.

The application discloses a preparation method and application of PDMS photoresist based on femtosecond laser two-photon polymerization, and verifies the feasibility of the photoresist formula through micro-nano structure processing. The preparation of the photoresist is achieved by dissolving isopropyl-9H-thioxanthone-9-ketone and 2-isopropyl thioxanthone in tetrahydrofuran to form a photo initiator solution. Then, the PDMS prepolymer is mixed with the photo initiator solution, and stirring is carried out in the dark for 12 hours to ensure uniformity, and bubbles are removed through evaporation of THF and ultrasonic treatment, and finally high-quality PDMS photoresist is obtained. Through accurate control of the ratio of the photo initiator and the PDMS, the photosensitivity and processing performance of the photoresist are significantly improved. Combined with the femtosecond laser two-photon polymerization technology, high-resolution (submicron level) and three-dimensional complex structure micro-nano processing is realized, and the method is suitable for the fields of microfluidic chips, biomedical devices and optical devices.

The present invention provides a photocurable resin composition that can be cured with visible light, can be used as an adhesive or a sealant for members that include polyethylene naphthalate (PEN) and do not readily transmit ultraviolet light, and also has excellent acidic aqueous solution resistance. This photocurable resin composition includes (A) an oligomer that has at least one (meth)acryloyl group, (B) a thioxanthone photoinitiator, and (C) a tertiary amine that has at least two aromatic rings in the molecule thereof.

The application belongs to the technical field of free radical regulated luminescent material, and particularly relates to a kind of 2-chlorothioxanthone-based photochromic material taking polyol as host and a preparation method and application thereof.The material realizes dynamic color change and luminescence regulation through photo-generated free radicals.The application takes 2-chlorothioxanthone as guest molecule, and systematically investigates photochromic behavior of 2-chlorothioxanthone in different polyol host substrates.First, luminescent material is prepared taking sorbitol as host substrate, and it is observed that 2-chlorothioxanthone doped material presents photochromic phenomenon from blue to yellow under excitation of 365 nm ultraviolet lamp, and is accompanied by afterglow decay.Ultraviolet-visible absorption spectrum analysis confirms generation of photo-generated free radical species.The application provides a series of photochromic materials, reveals core role of photo-generated free radical in dynamic luminescence regulation, and lays a foundation for novel luminescent material design of photo-generated free radical.

This invention relates to a pyrrolidinyl bifunctional catalyst linked to a photosensitizer, its preparation method, and its application. The catalyst possesses a nitrogen-tetradentate chiral center and a thioxanthone photosensitizing structural unit. In the preparation method, a chiral tetradentate ligand is chemically linked to a photosensitizer, followed by complexation with a metal salt to obtain a metal complex catalyst with both a chiral catalytic center and a photocatalytic center. This catalyst is applied to the asymmetric epoxidation reaction of chalcone, developing an asymmetric epoxidation process using oxygen as the oxidant. This invention is environmentally friendly and exhibits high stereoselectivity.

The invention discloses a disubstituted oxygen / thioxanthone efficient visible light initiator as a photoacid generator molecule applied to a photoinitiator of a prepolymer containing vinyl free radical photopolymerization system, the visible light initiator takes oxygen / thioxanthone as a main skeleton, and the structural formula is shown in the specification. The novel disubstituted oxygen / sulfur heterocyclic anthrone high-efficiency visible light initiator not only shows better solubility in an organic solvent and resin, but also shows higher polymerization efficiency in a light curing system, so that the application range of the novel disubstituted oxygen / sulfur heterocyclic anthrone high-efficiency visible light initiator in a free radical light curing system is widened.