42 results about "Thioxanthone" patented technology

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.

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 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 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.

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 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 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 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.

There is provided a radiation curable ink composition for ink jet, which contains a polymerizable compound, a polymerization initiator, and a thioxanthone sensitizing agent having a molecular weight of 300 or more, in which the polymerizable compound includes a monofunctional polymerizable compound and a difunctional polymerizable compound, the polymerization initiator includes phenyl bis(2,4,6-trimethylbenzoyl)phosphine oxide, the monofunctional polymerizable compound includes a hydroxyl group-containing monofunctional polymerizable compound, and a content of the difunctional polymerizable compound is 30% by mass or more with respect to a total amount of the ink composition.

The application discloses a method for electrocatalytically preparing 10-(4-biphenyl)-2-isopropyl thioxanthone sulfonium hexafluorophosphate, which uses 2-isopropyl thioxanthone as raw material to electrocatalytically prepare 10-(4-biphenyl)-2-isopropyl thioxanthone sulfonium hexafluorophosphate. In the method, an intermediate sulfoxide is obtained by adopting an anodic oxidation method under an electrocatalytic condition and using water as an oxygen source, thus avoiding the use of an additional oxidant and overcoming the defects of the prior art method, such as the need of an additional oxidant, high cost of production raw material and poor product quality.

Provided is a radiation-curable inkjet ink composition which is low in odor and has appropriate viscosity and curability as an inkjet ink. The radiation-curable inkjet ink composition includes: a polymerizable compound; a polymer thioxanthone polymerization initiator; and bis (2, 4, 6-trimethylbenzoyl)-phenylphosphine oxide, 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 mass% with respect to the total amount of the ink composition.

This invention provides a radiation-curable inkjet ink composition with good curability, blocking resistance of recorded materials, and odorless recorded materials. [Solution] A radiation-curable inkjet ink composition comprising a hydroxyl group-containing polymerizable compound (A), a monofunctional polymerizable compound (B) other than the hydroxyl group-containing polymerizable compound (A) having a glass transition temperature of 10°C or more and 90°C or less, and a polymer thioxanthone polymerization initiator (C).

This invention discloses an electrothermal material with high adhesion to polypropylene (PP) substrates. The material uses organic monomer molecules as film-forming materials, carbon materials as conductive media, 9-thioxanthone as a catalyst, and acid as an auxiliary agent. After heating and curing, an electrothermal material with high adhesion to polypropylene substrates can be prepared, belonging to the field of new material technology. Its characteristic is that the components, by weight ratio, are: 100 parts monomer A, 11-38 parts carbon materials, 1-1.8 parts catalyst, 0.5-2.2 parts acid, and 33-62 parts water. This invention also discloses its preparation method and application. After mixing the above components, the mixture is screen-printed onto a polypropylene substrate. After heating and curing, adhesion can be effectively improved, making it very suitable as a heating element in low-temperature heating scenarios such as automobiles, construction, and consumer appliances where a certain degree of substrate hardness is required.

To provide a curable resin composition for decorative films that offers high flexibility while also yielding a cured product with excellent surface hardness, scratch resistance, and chemical resistance. [Solution] A curable resin composition for decorative films comprising (a) a urethane (meth)acrylate having 2 to 9 unsaturated bonds, and (b) a photopolymerization initiator, wherein the (b) photopolymerization initiator comprises (b-1) a dialkyl peroxide having a thioxanthone skeleton represented by general formula (1), and the (b-1) component is 0.01 to 15 parts by mass per 100 parts by mass of the (a) component.

The invention discloses low-viscosity and high-strength optical fiber coloring ink based on a novel photoinitiator system as well as a preparation method, a use method and application of the low-viscosity and high-strength optical fiber coloring ink. The optical fiber coloring ink is prepared from the following components in parts by weight: 30 parts of polyurethane acrylate, 20 to 30 parts of epoxy acrylate, 10 parts of reactive diluent, 2 to 10 parts of coloring pigment, 1.5 to 3 parts of bis (2, 4, 6-trimethylbenzoyl) phenylphosphine oxide (BAPO), 0.5 to 1.0 part of isopropyl thioxanthone (ITX) and 0.3 to 0.8 part of 2, 4, 6-tri (dimethylaminomethyl) phenol (DMP-30). The optical fiber coloring ink provided by the invention has extremely low hydrogen evolution amount (24h, 100 DEG C) of 0.37 [mu] L / g. The optical fiber coloring ink has low viscosity (2020 mPa.s, 25 DEG C) and high tensile shear strength (13.7 MPa), and compared with existing optical fiber coloring ink, the viscosity is reduced by 50%, the tensile shear strength is improved by 20%, and the curing degree is improved by 8%.

A radiation-curable ink jet ink composition contains a polymerizable compound, a polymeric thioxanthone polymerization initiator, and bis(2,4,6-trimethylbenzoyl)-phenylphosphine oxide. The polymerizable compound contains no amine-modified oligomer, or the polymerizable compound contains an amine-modified oligomer, and an amount of the amine-modified oligomer is less than 5% by mass with respect to a total amount of the radiation-curable ink jet ink composition.

The invention provides a sample treatment method for determining a photoinitiator in a packaging material, and belongs to the field of sample treatment and detection. The sample treatment method comprises the following steps: extracting a system consisting of a to-be-detected packaging material and an extracting agent in a medium collision extraction instrument, and then carrying out solid-liquid separation to obtain a to-be-detected sample solution; the extracting agent is methanol; the material-liquid ratio of the area of the sample to be detected to the volume of the extracting agent is 1-10cm < 2 > / mL; the linear speed of the medium collision extraction instrument is 4 m.s <-1 >-5.5 m.s <-1 >; in the extraction treatment process, a cracking medium is 1 / 4 inch cylindrical ceramic beads; the time of single extraction treatment is less than or equal to 60 seconds, and the total time of the extraction treatment process is 1-3 minutes; the photoinitiator is at least one of 2-methyl benzophenone, 3-methyl benzophenone, 4-isopropyl thioxanthone and biphenyl benzophenone. The photoinitiator is at least one of 2-methyl benzophenone, 3-methyl benzophenone, 4-isopropyl thioxanthone and biphenyl benzophenone. Based on the sample treatment method, the sample can be quickly treated, the sample extraction rate is improved, and the condition of missing detection is avoided.

Provided is a curable composition for three-dimensional stereolithography, the curable composition containing 100 parts by mass of a radical polymerizable monomer (A), 5.0-400 parts by mass of an inorganic filler (B), 0.05-10.0 parts by mass of a photopolymerization initiator (C) containing an acylphosphine compound, 0.01-5.0 parts by mass of a polymerization inhibitor (D), and 0.01-10.0 parts by mass of a photosensitizer (E) including a thioxanthone compound represented by formula (1). The present invention also provides a method for producing an object by three-dimensional stereolithography and a method for producing a dental restoration, the methods using said curable composition for three-dimensional stereolithography. In the formula, Y1 to Y8 each independently represent a hydrogen atom, an alkyl group having 1-20 carbon atoms, or the like.

Provided is a radiation-curable inkjet ink composition having good curability, blocking resistance of a recorded material, and odor of the recorded material. A radiation-curable inkjet ink composition comprising: a polymerizable compound (A) containing a hydroxyl group; a monofunctional polymerizable compound (B) other than the hydroxyl group-containing polymerizable compound (A) having a glass transition temperature of from 10 DEG C to 90 DEG C (inclusive); and a polymer thioxanthone polymerization initiator (C).

Provided are an anti-plating composition and a dry film which have low exposure energy and high sensitivity, and a cured product which is formed therefrom, has excellent plating resistance, high resolution, and is free of lateral erosion and diffusion plating, and an electrode of a solar cell using the same. The electroplating-resistant composition comprises (A) a carboxyl group-containing resin, (B) a photosensitive monomer and (C) a photopolymerization initiator, and the photopolymerization initiator (C) comprises 4, 4 '-diphenyl-1, 3, 4, 5-tetramethyl-1, 3, 5-tetramethyl-1, the invention relates to an oxime ester photopolymerization initiator, which is prepared from 4, 4 '-bis (diethylamino) benzophenone, 2-isopropyl thioxanthone, 2, 4, 6-trimethylbenzoyl diphenyl phosphine oxide, 2-methyl-1-(4-methylthiophenyl)-2-morpholinyl propane-1-one and an oxime ester photopolymerization initiator as shown in a formula (1),