33results about How to "Improve photoinitiation efficiency" patented technology

The invention discloses water-based UV black ink with super-high solid content and a preparation method thereof. The black ink comprises the following components in percentage by weight: 20%-60% of high-functionality water-based polyurethane acrylate, 5%-8% of compound photoinitiator, 15%-35% of hydrophilic acrylate diluted body or prepolymer, 10%-25% of solvent and 5%-15% of nano-carbon black pigment. The light curing time of the water-based UV black colored paint of the invention is shorter than 5 seconds, the bottom layer can be completely cured, the comprehensive properties of adhesive force, hardness, toughness and the like are excellent, and the water-based UV black colored paint can be widely applied to the fields of ink, wood paint and the like; the solid content is as high as 80%;and the water-based UV black ink has short drying and curing time, simple construction technology and high production efficiency, can be diluted by water or ethanol or other nontoxic solvents for regulating the viscosity, is suitable for various production modes and production requirements, and is environment-friendly and nontoxic.

The invention discloses a macromolecular photoinitiator containing diphenyl ketone groups and a preparation method of the macromolecular photoinitiator. The general structural formula of the macromolecular photoinitiator containing the diphenyl ketone groups is shown in the formula (I), wherein R1 refers to a methyl group or hydrogen; R2 refers to an alkyl group, hydrogen, an ethoxyl group or a hydroxypropyl group; R3 refers to an alkyl group, hydrogen or an ethoxyl group; R4-8 and R'4-7are separately selected from hydrogen or an alkyl group; R9 refers to a methyl group or hydrogen. The designed and synthesized macromolecular photoinitiator is obtained through copolymerization of a synthesized special polymerizable photoinitiator. According to the adopted polymerizable photoinitiator, two diphenyl ketone units contained in each molecule are fixed on two sides of a rigid triazine ring and are not contacted with each other, so that the probability of combination of adjacent free radicals is greatly decreased, and the photoinitiation efficiency is improved; meanwhile, the polymerizable photoinitiator contains amido hydrogen supply units, and accordingly, comonomers containing hydrogen supply components such as tertiary amine and the like are not required to be added additionally during preparation of the macromolecular photoinitiator.

The invention discloses an assisted initiator amine-containing polymerizable thioxanthone carbazole visible light photoinitiator and a preparation method thereof. The preparation method comprises that a compound containing polymerizable and epoxy groups is added into an amine compound, the mixture undergoes a reaction, the amine is removed so that alcohol containing polymerizable and assisted initiator amine groups is obtained, the alcohol or the alcohol and pyridine are added into chloroform, a mixture of PBr3 and chloroform is dropwisely added into the mixture, the mixture undergoes a reaction, the reaction product is treated to form a bromo-compound containing polymerizable and assisted initiator amine groups, thioxanthone carbazole and alkali are added into N, N-dimethyl formamide (DMF), the mixture is stirred to form a uniform mixture, the bromo-compound, cupferron and the N, N-dimethyl formamide mixture are dropwisely added into the reaction system, the reaction system undergoes a reaction, and the reaction product is treated to form a product. The visible light photoinitiator avoids yellowing and toxicity caused by the micromolecule assisted initiator, reduces oxygen inhibition influences and improves a curing rate and cured film stability.

The invention belongs to aromatic ketone compounds, specifically relating to an aromatic ketone coumpound photoinitiator for ultraviolet light radiation solidification and method of manufacturing the same. The method consists of the following two typical steps: a first step of coverting the organic carboxyl acid coumpound into the corresponding acyl chloride intermediate under the action of thionyl chloride, and then the intermediate, without a separation and purifying process, directly performing Friedman-Crafts acylation reaction with biphenyl or disubstituted benzene compounds under the action of the equivalent or catalytic amount of Lewis acid type promotor to couple and obtain aromatic ketone coumpounds; a second step of performing soda treatment to a hydroxy-substituted aromatic ketone raw material to obtain its ion salt, the salt reacts with halogenated hydrocarbon, acyl chloride or other electrophilic reagents to obtain aromatic ketone compounds.

The invention provides a dioxime ester photoinitiator, a preparation method, a photosensitive resin composition and application. The dioxime ester photoinitiator has a structure shown in a general formula (I). Since the dioxime ester photoinitiator contains a polymerizable group, the dioxime ester photoinitiator can form a polymer cured product with a large molecular weight by means of a polymerization reaction during application so that photoinduced migration can be effectively reduced. At the same time, due to the special structure, the dioxime ester photoinitiator has high initiation efficiency. Therefore, the dioxime ester photoinitiator having the structure above has the advantages of being unlikely to migrate, high in photoinitiation efficiency and the like.

The invention relates to polycyclic amine modified (branched) polyether acrylate and a preparation method and application thereof. The polycyclic amine modified (branched) polyether acrylate is prepared by taking heteropolycyclic amine with diphenyl ketone and polycyclic tertiary amide structure as a modifier for Michael addition reaction and introducing the polycyclic tertiary amide structure into part of double bonds of (branched) polyether acrylate. The polycyclic amine modified (branched) polyether acrylate is low in viscosity and curing shrinkage rate and high in curing speed, overcomes the defect that conventional active amine is large in smell, prone to amide migration and yellowing and is a photocuring material having great prospect.

The invention relates to a benzophenone fragment and p-nitrodiphenylethene fragment-containing tree like visible light photoinitiator and synthesis and application thereof, belonging to the field of photoinitiators. The tree like visible light photoinitiator comprises the typical chemical structural general formulae shown in the description, wherein n1 and n2 in molecular structural formulae (I) and (II) represent 1-6, wherein in the molecular structural formula (I), the (I) is prepared through reacting 4-(4'-bromohydrocarbylstyyl) nitrobenzene with 3,5-dihydroxylbenzyl alcohol to obtain a product of 3,5-di((4'-nitrobenzenevinyl)benzene alkoxide)benzyl alcohol, and then reacting the 3,5-di((4'-nitrobenzenevinyl)benzene alkoxide)benzyl alcohol with 4-bromomethylbenzophenone under alkaline conditions; and in the molecular structural formula (II), the (II) is prepared through reacting 4-bromohydrocarbylbenzophenone with 3,5-dihydroxylbenzyl alcohol to obtain a product of 3,5-di((4'-benzoyl)benzene alkoxide)benzyl alcohol, and then reacting the 3,5-di((4'-benzoyl)benzene alkoxide)benzyl alcohol with 4-(4'-hydroxylstyryl)nitrobenzene under alkaline conditions. The benzophenone fragment and p-nitrodiphenylethene fragment-containing tree like visible light photoinitiator has the maximum absorption in a visible light region and can be used as the photoinitiator to form a photosensitive system together with a triethanolamine auxiliary agent and used for visible light polymerization of alkene monomers in a solution or used as photocuring materials.

The invention belongs to the technical field of coatings, and relates to a weather-resistant ultraviolet curing solvent-free spraying open transparent primer. The weather-resistant ultraviolet curing solvent-free spraying open transparent primer comprises the following components in percentage by mass: 10-30% of urethane acrylate resin, 10-20% of polyester acrylic resin, 0.1-0.3% of an antifoaming agent, 0.2-1% of a wetting dispersant, 0.1-1% of a leveling agent, 0.1-0.5% of a base material wetting agent, 2-5% of a first photoinitiator, 2-5% of a second photoinitiator, 0.1-0.5% of a thixotropic agent, 0.1-1% of fumed silica, 5-20% of talcum powder, and 40-60% of a UV reactive diluent. The UV primer is safe, environmentally friendly, low in VOC content, good in construction performance, capable of being recycled and excellent in paint film performance.

The invention relates to a vinyl chloride-vinyl acetate resin-based benzophenone macromolecular photoinitiator and a preparation method thereof. The preparation method comprises the following steps: synthesizing an isocyanate-terminated intermediate PU-1 containing a carbamate structure from N-methyldiethanolamine and diisocyanate, and reacting the PU-1 with hydroxyl ternary vinyl chloride-vinyl acetate resin and p-hydroxybenzophenone in sequence to obtain the target product PV-PU. The macromolecular photoinitiator prepared by the preparation method has a general formula structure shown as formula (I) shown in the specification. The same molecular chain contains benzophenone and tertiary amine structures at the same time so that the efficiency of generating active species through photosensitive decomposition can be improved; meanwhile, the photoinitiator contains a vinyl chloride-vinyl acetate structure and a polyurethane structure so that compatibility with an initiating system is improved, surface migration of the photoinitiator is greatly reduced, the color developing property on pigment is excellent, the adhesive force on a substrate is good, and the photoinitiator can be usedas a special functional material for vinyl chloride-vinyl acetate resin and can be widely applied to the fields of UV photocuring, wood lacquer, PVC base materials, ink printing and the like.

The invention relates to self-cross-linking waterborne light-curing polyurethane, a preparation method and applications thereof, wherein the polyurethane is mainly obtained by carrying out a reactionon components including polyol and isocyanate, wherein the polyol comprises unsaturated polyol containing tertiary amine groups and carbon-carbon double bonds, polyol containing photosensitive groups,polyalcohol and polyol containing carboxyl groups, and the polyurethane simultaneously contains carbon-carbon double bonds and photosensitive groups so as to be subjected to spontaneous polymerization and cross-link curing under ultraviolet irradiation without the addition of a photoinitiator. According to the invention, the polyurethane structure is flexible in design, and the overall chemical structure and the composition of each unit can be adjusted according to requirements, so that a polyurethane coating film with excellent performance is obtained.

The invention relates to a visible light initiation system, especially to a preparation method for a high-efficiency biocompatible radical photopolymerization visible light initiation system, belonging to the technical field of photocuring preparation of medical hydrogels. The visible light initiation system is added into a photocured hydrogel precursor solution for preparation of a photocured hydrogel. On the basis that the total weight of the photocured hydrogel precursor solution is 100%, the system comprises, by weight, 0.5 to 1% of the first component--a photosensitizer, 0.5 to 1% of a second component--a coinitiator which is water-soluble sericin or silk peptide having undergone oxidation treatment by hydrogen peroxide, and / or 0.5 to 1% of a third component--a photosensitive synergist which is one selected from a group consisting of an iodonium salt, a sulfonium salt and a phosphonium salt.

The invention belongs to the technical field of photocuring materials, and particularly relates to a preparation method and application of modified titanium dioxide serving as a photoinitiator, a Ti-OH bond structure on the surface of a titanium dioxide particle is converted into a Ti-F bond structure, then the Ti-F bond structure on the surface of the titanium dioxide particle is converted into a titanium-carboxylic ester structure, and thus, the modified titanium dioxide is prepared. The prepared modified titanium dioxide has remarkable activity of photo-initiation of polymerization and crosslinking of acrylate monomers or / and resin, and can be used as a photoinitiator to be applied to the photo-curing fields of white photo-curing coatings, printing ink and the like.

The invention relates to the field of encapsulating materials and particularly provides an encapsulating adhesive, a preparation method therefor, an encapsulating body and a preparation method therefor. The encapsulating adhesive is mainly prepared from the following raw materials in parts by mass: 40-60 parts of difunctional acrylate, 10-30 parts of trifunctional acrylate, 10-50 parts of acrylateprepolymer, 1-15 parts of ultraviolet photoinitiator and 1-8 parts of photosensitizer. The encapsulating adhesive has the advantages of high curing efficiency, high curing speed, environment-friendliness, low cost and the like, has no need of high temperatures during curing and cannot quench quantum dots.

The invention relates to a self-crosslinking water-based photocurable polyurethane and its preparation method and application. The polyurethane is mainly obtained by reacting components including polyols and isocyanates, and the polyols include unsaturated polyols containing tertiary amino groups and carbon-carbon double bonds, polyols containing photosensitive groups, polypolyols and carboxyl-containing polyols. alcohol. The polyurethane contains carbon-carbon double bonds and photosensitive groups at the same time, and can be spontaneously polymerized and cross-linked and cured under ultraviolet light irradiation without adding a photoinitiator. The structural design of the polyurethane of the present invention is relatively flexible, and the overall chemical structure and the composition of each unit can be adjusted according to requirements, so as to obtain a polyurethane coating film with excellent performance.

The invention belongs to the field of radiation curing new materials, and relates to an aromatic ketone compound, in particular to a monosubstituted or polysubstituted polyfunctional group aromatic ketone compound, a preparation method thereof and a photopolymerization composition containing an ethylenically unsaturated compound system, which takes the compound as an effective component. The invention provides monosubstituted and polysubstituted polyfunctional group aromatic ketone compounds. The polyfunctional group aromatic ketone compounds have a general formula structure as shown in (I). The invention also discloses a preparation method and an application of the polyfunctional aromatic ketone compound. According to the invention, industrial-grade raw materials which are low in cost and easy to obtain are used as a starting point to prepare the monosubstituted or polysubstituted functionalized aromatic ketone compound in a breakthrough way, and the compound is applied to a photoinitiator in radiation curing, so that the problems of toxicity and VOCs pollution of the photoinitiator are solved, and the economic competitiveness of the photoinitiator is strived; the overall cost is reduced, and the photo-initiation efficiency is improved.

The invention discloses a free radical photoinitiator containing a single vinyl ether group or a single propenyl ether group, and a preparation method thereof. The method comprises the following steps of: firstly adding diisocyanate, hydroxyl single vinyl ether or hydroxyl single propenyl ether into a reaction container and performing an ammonia esterification reaction; after reacting, adding a small-molecular free radical photoinitiator containing hydroxyl radicals, a solvent, a polymerization inhibitor and a catalyst into the reaction container and continuously performing the ammonia esterification reaction; and removing the solvent after reacting, thereby obtaining the free radical photoinitiator product containing the single vinyl ether group or the single propenyl ether group. Based on the vinyl ether group or the propenyl ether group, the free radical photoinitiator can be used for overcoming the defect of other polymerizable photoinitiators which are easy to polymerize automatically and poor in photostability, and has the good storage stability. When the free radical photoinitiator is used for a free radical photo-curing system, the free radical photoinitiator also has the advantages of low mobility and high stability. The free radical photoinitiator which is reliable and safe can be applied to UV (ultraviolet)-cured adhesives, coating materials and printing inks. Thus, the free radical photoinitiator has the great significance for the application and the popularization of photo-curing products in food packaging and medicine packaging.

The invention relates to a compound type odor-less light initiator and an ultraviolet curing coating material. The compound type odor-less light initiator is prepared from the following components in percentage by weight: 30 to 70 percent of zinc oxide and 30 to 70 percent of macromolecular light initiator, wherein the macromolecular light initiator is prepared from a hydroxy-containing light initiator, isocyanate and hydroxy-containing acrylic acid. The compound type odor-less light initiator disclosed by the invention is capable of effectively solving a smell problem generated by volatile organic small molecules released after photolysis of an organic light initiator, the initiation efficiency is high, and the conversion rate of the ultraviolet curing coating material can be increased, so that the smell and volatile organic matters released by residual unreacted raw materials in the ultraviolet curing coating material can be further reduced, and a paint film after photopolymerization is odor-less and is good in performance.

The invention discloses a method for preparing polymer Michler's ketone photoinitiators, which is shown in the following formula. The method comprises the following steps: synthesizing Michler's ketone containing two methyl tertiary amines by using 4,4'-difluorobenzophenone and piperazine as raw materials, dissolving the resulting Michler's ketone and a diepoxy monomer in an organic solvent, and allowing polymerization reaction for several hours under heating to produce the polymer Michler's ketone photoinitiator. The photoinitiator contains both Michler's ketone and amine co-initiator in themain chain and exhibits excellent photoinitiation property. Compared with the micromolecular photoinitiators, the polymer photoinitiator has the advantages of low mobility and toxicity and is widely used in painting, microelectronics and optical fields.

The invention belongs to aromatic ketone compounds, specifically relating to an aromatic ketone coumpound photoinitiator for ultraviolet light radiation solidification and method of manufacturing the same. The method consists of the following two typical steps: a first step of coverting the organic carboxyl acid coumpound into the corresponding acyl chloride intermediate under the action of thionyl chloride, and then the intermediate, without a separation and purifying process, directly performing Friedman-Crafts acylation reaction with biphenyl or disubstituted benzene compounds under the action of the equivalent or catalytic amount of Lewis acid type promotor to couple and obtain aromatic ketone coumpounds; a second step of performing soda treatment to a hydroxy-substituted aromatic ketone raw material to obtain its ion salt, the salt reacts with halogenated hydrocarbon, acyl chloride or other electrophilic reagents to obtain aromatic ketone compounds.

The invention discloses a thioxanthone dicarboamide compound and a preparing method and application thereof. The structural formula of the thioxanthone dicarboamide compound is shown in the specification. The thioxanthone dicarboamide compound is used as a UV-LED photoinitiator for photopolymerization of a vinyl unsaturated resin system, and can be applied to the photocuring field, the photopolymerization field and the photocrosslinking field.

The invention discloses an assisted initiator amine-containing polymerizable thioxanthone carbazole visible light photoinitiator and a preparation method thereof. The preparation method comprises that a compound containing polymerizable and epoxy groups is added into an amine compound, the mixture undergoes a reaction, the amine is removed so that alcohol containing polymerizable and assisted initiator amine groups is obtained, the alcohol or the alcohol and pyridine are added into chloroform, a mixture of PBr3 and chloroform is dropwisely added into the mixture, the mixture undergoes a reaction, the reaction product is treated to form a bromo-compound containing polymerizable and assisted initiator amine groups, thioxanthone carbazole and alkali are added into N, N-dimethyl formamide (DMF), the mixture is stirred to form a uniform mixture, the bromo-compound, cupferron and the N, N-dimethyl formamide mixture are dropwisely added into the reaction system, the reaction system undergoes a reaction, and the reaction product is treated to form a product. The visible light photoinitiator avoids yellowing and toxicity caused by the micromolecule assisted initiator, reduces oxygen inhibition influences and improves a curing rate and cured film stability.

The invention relates to the field of packaging materials, and specifically provides a packaging glue and a preparation method thereof, a packaging body and a preparation method thereof. The encapsulant is mainly prepared from the following raw materials in parts by mass: 40-60 parts of difunctional acrylate, 10-30 parts of trifunctional acrylate, 10-50 parts of acrylate prepolymer, ultraviolet photoinitiator 1‑15 parts and photosensitizer 1‑8 parts. The packaging adhesive has the advantages of high curing efficiency, fast curing speed, environmental protection and low cost, and does not require high temperature during curing, and will not quench the quantum dots.

The invention discloses a macromolecular photoinitiator containing diphenyl ketone groups and a preparation method of the macromolecular photoinitiator. The general structural formula of the macromolecular photoinitiator containing the diphenyl ketone groups is shown in the formula (I), wherein R1 refers to a methyl group or hydrogen; R2 refers to an alkyl group, hydrogen, an ethoxyl group or a hydroxypropyl group; R3 refers to an alkyl group, hydrogen or an ethoxyl group; R4-8 and R'4-7are separately selected from hydrogen or an alkyl group; R9 refers to a methyl group or hydrogen. The designed and synthesized macromolecular photoinitiator is obtained through copolymerization of a synthesized special polymerizable photoinitiator. According to the adopted polymerizable photoinitiator, two diphenyl ketone units contained in each molecule are fixed on two sides of a rigid triazine ring and are not contacted with each other, so that the probability of combination of adjacent free radicals is greatly decreased, and the photoinitiation efficiency is improved; meanwhile, the polymerizable photoinitiator contains amido hydrogen supply units, and accordingly, comonomers containing hydrogen supply components such as tertiary amine and the like are not required to be added additionally during preparation of the macromolecular photoinitiator.

The present invention relates to coating field, more specifically, the present invention relates to a kind of UV coating and preparation method thereof, by weight, the preparation raw material of described coating comprises 45-60 parts of N-alkylmaleimide modified Urethane acrylate, 10-35 parts acrylate monomer, 0.05-1 part initiator. The dosage of UV paint initiator described in this application is low, and the odor is low, reaching the A in the French VOC label + standard.

The invention belongs to the technical field of photocurable materials, and in particular relates to a preparation method and application of modified titanium dioxide as a photoinitiator. The invention first converts the Ti-OH bond structure on the surface of the titanium dioxide particle into a Ti-F bond structure , and then transform the Ti-F bond structure on the surface of the titanium dioxide particles into a titanium-carboxylate structure, thereby preparing the modified titanium dioxide. The prepared modified titanium dioxide has significant activity of photoinitiating the polymerization and crosslinking of acrylate monomers or / and resins, and can be used as a photoinitiator in the photocuring fields of white photocurable coatings and inks.

The invention relates to a visible light initiation system, especially to a preparation method for a high-efficiency biocompatible radical photopolymerization visible light initiation system, belonging to the technical field of photocuring preparation of medical hydrogels. The visible light initiation system is added into a photocured hydrogel precursor solution for preparation of a photocured hydrogel. On the basis that the total weight of the photocured hydrogel precursor solution is 100%, the system comprises, by weight, 0.5 to 1% of the first component--a photosensitizer, 0.5 to 1% of a second component--a coinitiator which is water-soluble sericin or silk peptide having undergone oxidation treatment by hydrogen peroxide, and / or 0.5 to 1% of a third component--a photosensitive synergist which is one selected from a group consisting of an iodonium salt, a sulfonium salt and a phosphonium salt.

The invention belongs to the technical field of high polymer materials, and particularly relates to a polymerizable thioxanthone water-based photoinitiator and a preparation method and application thereof, and the polymerizable thioxanthone water-based photoinitiator contains a polyaminoamine structural unit, a thioxanthone structural unit and a phosphoric acid structural unit, the thioxanthone structural unit and the phosphoric acid structural unit are randomly connected with N in the polyaminoamine structural unit. According to the thioxanthone water-based photoinitiator, linear polyaminoamine serves as a macromolecular main chain, linear polyamide, a phosphate group, thioxanthone and an amine structure are contained on the macromolecular main chain at the same time, the number of curing sites is larger, and the curing degree is higher. Moreover, the thioxanthone water-based photoinitiator can participate in two stages of a one-pot dual-curing process in an acrylic acid group / methacrylic acid group UV photocuring system, not only can be used as a nucleophilic reagent and alkali in a first-stage reaction, but also can induce free radical polymerization in a second-stage reaction.

The invention provides a bis-oxime ester photoinitiator, a preparation method, a photosensitive resin composition and an application. The bis-oxime ester photoinitiator has a structure represented by general formula (I). Since the above-mentioned bis-oxime ester photoinitiator contains a polymerizable group, it can form a polymer cured product with a relatively large molecular weight through a polymerization reaction during application, thereby effectively reducing the mobility induced by light. At the same time, due to the particularity of its structure, it has a relatively high initiation efficiency. Therefore, the bis-oxime ester photoinitiator with the above structure has the advantages of being difficult to migrate and having high photoinitiation efficiency.

The invention relates to a photopolymerization initiating system, in particular to a free radical photopolymerization initiating system based on amino acid derivatives and a method for initiating free radical photopolymerization, belonging to the technical field of free radical polymerization. A free radical photopolymerization initiating system based on amino acid derivatives, based on the total weight of the water-soluble photopolymerization system as 100%, the free radical photopolymerization initiating system includes the following components in weight percentage: the first component: photosensitive agent, 0.01-1%; the second component: co-initiator, 0.25-1.25%, and the co-initiator is a nitrogen-terminal non-phenyl substituted carboxy-terminal blocked glycine derivative. The co-initiator of the present invention is a glycine derivative with non-phenyl-substituted carboxy-terminal closure at the nitrogen end, which is a colorless compound without chromophoric groups; the photoinitiating system has high tolerance to environmental alkali; The photoinitiation efficiency is excellent.