42results about How to "Good light curing effect" patented technology

The invention relates to a pyrazole oxime ester photoinitiator with a chemical formula (I). The photoinitiator has excellent application performance and extremely high photographic performance, can greatly improve the photocuring performance when being applied to photosensitive compositions and remarkably improve the production efficiency of the photosensitive compositions in the application fields, such as the preparation of color filters, and the like. The invention also relates to a preparation method of the pyrazole oxime ester photoinitiator and the application of the pyrazole oxime ester photoinitiator to the photosensitive compositions.

The invention provides a photosensitive resin composition for an insulating film. The photosensitive resin composition is advantaged by high sensitivity, high resolution, high reliability and excellent chemical resistance, and is applicable to a permanent insulating film without increasing the supplementation of photopolymerization initiators. The photosensitive resin composition for the insulating film is characterized in that as the necessary composition, the photosensitive resin composition comprises (i) alkali soluble resin with hydroxyl and a polymerizable unsaturated group in one molecule shown by the general formula (1) below, (ii) a photopolymerizable monomer with at least an alkene-attribute unsaturated bond, (iii) a photopolymerizable initiator and (iv) an epoxy composition.

The invention provides 3D (three-dimensional) printing post-processing equipment. A first sliding rail parallel to a beam is fixedly arranged on the beam of a base box body; a first sliding block is in sliding connection with the first sliding rail; the first sliding block is connected with a second sliding rail by a first fixed plate; the second sliding rail is arranged in parallel to an uprightcolumn; a second sliding block is in sliding connection with the second sliding rail; a motor is arranged on a second fixed plate; the motor is in transmission connection with a rotating shaft parallel to the second sliding rail; by respective movement of the first and second sliding blocks on the first and second sliding rails, movement of a processed object in the horizontal and vertical directions is implemented; by transverse movement of the first sliding block, switching of a receiving room, a cleaning room and a curing room can be completed, so that an automation degree is improved; theprocessed object is driven by the second sliding block and the motor to conduct the vertical and rotating motion, so that a cleaning effect is improved; a fan for cooling and dissipating heat is arranged in the curing room, and a reflector is arranged in the curing room to reflect emergent ultraviolet light into the curing room, so that a light curing irradiation effect on the processed object isimproved.

Disclosed is a photocurable/thermosetting resin composition wherein the volatile component is reduced by using no or less photopolymerization initiator. This photocurable/thermosetting resin composition can be cured by relatively small amount of ultraviolet irradiation and can be developed with an aqueous alkaline solution. This composition contains a carboxyl group-containing photosensitive resin (A), a maleimide derivative (B), a compound (C) having two or more epoxy groups and/or oxetanyl groups in one molecule, and a radically polymerizable compound (D) having a cyclic ether group or a morpholino group.

The invention relates to a radiation curable composition comprising (A) a component comprising a carboxyl group that may dissociate in the presence of an acid, (B) a cationically polymerizable compound, and (C) a cationic photoinitiator.

The invention belongs to the technical field of coatings, and discloses a water-based one-coating UV-cured epoxy acrylate coating and a preparation method thereof. The coating comprises the followingcomponents in percentage by mass: 25%-50% of epoxy acrylic resin, 10%-20% of a hydrophilic active monomer, 0.1%-3% of a water-based photoinitiator, 1%-7% of water-based silver paste, 1%-3% of water-based color paste, 0.5%-2% of a water-based additive and the balance of water, totaling 100%. By adopting a specific catalyst and a polymerization inhibitor, a paint film can be quickly cured at one time, and the cross-linking curing of the paint film is more sufficient; and a specific hydrophilic functional monomer is adopted, so that the stability of the water-based paint is further improved.

The invention aims to provides a photosensitive resin composition. The basic characteristics such as electrical insulation property are not destroyed. The photosensitive resin composition is exposed by a direct scanning device, the inner of the coating has a photo curing property and good sensitivity, the linear shape deterioration of a cured object is avoided, and excellent resolution is obtained. The photosensitive resin composition comprises (A) carboxyl containing photosensitive resin, (B) a polymerization initiator, (C) epoxy compounds, and (D) a coloring agent. The (B) polymerization initiator is represented by a formula, wherein in the formula, R1 represents H, a C1-C17 alkyl group, or a C1-C17 alkoxyl group, and R2 represents a phenyl group substituted by at least one of a phenyl group, a C1-C5 alkyl group, -O-CmH2m-CH3-, and -O-CnH2n-CpH2p-CH3, wherein m, n, and p all represent an integer from 1 to 5.

The invention discloses an optical hot-pressing film. The optical hot-pressing film comprises a base material and glue which is positioned on the base material; the optical hot-pressing film is obtained by coating the base material with the glue; the glue comprises the following raw materials in parts by weight: 31 to 52 parts of EVA hot-melt adhesive, 1 to 6 parts of terpene resin, 0 to 6 parts of rosin resin, 2 to 9 parts of dicyclopentadiene resin, 0 to 3 parts of isophthalic unsaturated polyester resin, 3 to 6 parts of diphenyl propane epoxy resin, 9 to 16 parts of a photoinitiator, 2 to 8 parts of an antioxidant, 12 to 26 parts of cashew nut shell oil-modified amine hardener, and 8 to 12 parts of optical curing monomers. According to the optical hot-pressing film, the production cost of an optical adhesive is greatly reduced; the optical hot-pressing film has excellent reworking property; moreover, a hot-melt pressure-sensitive adhesive has excellent optical performance.

The invention relates to a photocuring 3D printer. The photocuring 3D printer comprises a plurality of light-emitting sources, a grid plate, a lens and an LCD liquid crystal light-transmitting screen, wherein the multiple light-emitting sources are uniformly arranged and emit scattered light rays simultaneously; the grid plate is located above the light-emitting sources, a vertical light channel is formed in the position, corresponding to the position over one light-emitting source, of the grid plate, the light-emitting sources are located in the center of the light channel, and the light channel is defined by vertical light-proof side walls limiting light reflection; the lens is located above a light guide part, and a condensing lens unit is formed at the position, corresponding to the position over one light channel, of the lens; and the LCD liquid crystal light-transmitting screen is positioned above the lens, and the LCD liquid crystal light-transmitting screen is provided with a pixel dot matrix. According to the photocuring 3D printer, the control requirement for the light sources is simplified, the light uniformity is improved, and the product curing effect is improved.

The invention discloses silicon carbide reinforced silicon nitride ceramic and a preparation method thereof, and relates to the technical field of ceramic materials. According to the preparation method, the silicon powder is subjected to heating surface oxidation treatment, so that a SiO2 layer with relatively low absorbance and refractive index is formed on the surface of the silicon powder, the introduced oxygen content is removed through carbon thermal reduction, and meanwhile, the silicon carbide phase reinforced silicon nitride ceramic is generated. The silicon nitride ceramic prepared by taking the silicon powder as the raw material through a reaction sintering method has the characteristic of low shrinkage distortion, and the preparation of the silicon carbide reinforced silicon nitride ceramic with a complex shape can be realized by matching with a photocuring molding technology.

The present invention provides a black photosensitive resin composition which has excellent clarity and excellent blackness, thereby having high covering power. The black photosensitive resin composition contains (A) a carboxyl group-containing photosensitive resin, (B) a photopolymerization initiator, (C) a reactive diluent, (D) an epoxy compound, and (E) a colorant, wherein the (E) colorant contains (E1) a phthalocyanine colorant and (E2) a diketopyrrolopyrrole colorant.

The invention provides a fluorene photoinitiator, a preparation method thereof, a photocuring composition containing the fluorene photoinitiator and application of the fluorene photoinitiator in the field of photocuring. The fluorene photoinitiator has a structure shown as a formula (I), wherein R3 is selected from photoactive groups. A benzophenone alkyl substituent group is introduced to a No.9carbon atom position of a fluorene structure, and fragments formed by the initiator still have high stability and photocuring effect after initiation reaction; meanwhile, the introduction of the photoactive group R3 can improve the light absorption efficiency of the photoinitiator so that the improvement of the sensitivity of the photoinitiator is facilitated. In addition, due to the fact that thephotoinitiator is large in component and light in color, the photoinitiator further has the advantages of being not prone to migration and excellent in yellowing resistance, and therefore the photoinitiator further has the advantages of being almost free of VOC emission, low in smell and excellent in yellowing resistance.

The invention provides a fluorene initiator, a photocurable composition containing the same and an application of the fluorene initiator and the photocurable composition. The fluorene photoinitiator has a structure as shown in a formula (I). According to the photoinitiator, one or more alkyl ketone substituents are introduced to a fluorene structure, and two aryl ketone substituents are introducedto a No.9 carbon atom, so that fragments formed by the initiator still have relatively high stability and photocuring effect after initiation of an initiation reaction; meanwhile, due to the introduction of a plurality of photoactive groups R3, the number of free radicals generated by the photoinitiator per unit mass can be increased, and the sensitivity of the photoinitiator can be improved. Inaddition, due to the fact that the photoinitiator is large in molecular weight and light in color, the photoinitiator further has the advantages of being not prone to migration and excellent in yellowing resistance, and therefore the photoinitiator further has the advantages of being almost free of VOC emission, low in smell and excellent in yellowing resistance.

The present invention provides a method for manufacturing a wiring board having a protective film, by which voids can be prevented from being generated in the protective film and excellent heat resistance can be imparted to the protective film. The manufacturing method of the wiring board having the protective film comprises the following steps: a first coating film formation step, wherein a firstphotosensitive resin composition is sprayed on a wiring board having a substrate and a conductor provided on the substrate to form a first coating film, the viscosity of the first photosensitive resin composition is 10-50 seconds when measured by a rock field cup, and the film thickness of the first coating film after drying is less than or equal to the thickness of the conductor; a second coating film formation step, wherein a second photosensitive resin composition having a viscosity higher than that of the first photosensitive resin composition is applied to the surface of the first coating film to form a second coating film, and the sum of the film thickness of the first coating film after drying and the film thickness of the second coating film after drying is greater than the thickness of the conductor.

The invention discloses LED-UV ink for high-speed double-sided printing and a preparation method thereof. The LED-UV ink is prepared from the following raw materials: a prepolymer, a reactive diluent, a photoinitiator, a pigment, a filler, wax powder and an auxiliary agent. The prepared LED-UV ink can be rapidly cured in an LED-UV curing system, a cured ink film layer is high in glossiness and good in wear resistance, the ink does not contain volatile substances and is safe and environmentally friendly, and the printing efficiency and the printing quality are greatly improved.