59results about How to "Avoid oxygen inhibition" patented technology

The invention discloses a large-scale solvent-free electrospinning method for preparing micro-nano fibers of light-curing materials, which comprises the following steps: (1) configuring a spinning precursor solution of light-curing materials; (2) electrospinning micro-nano fibers: (1) The prepared spinning precursor solution is placed in the liquid storage mechanism of the electrospinning device connected to the spinning nozzle, and the spinning nozzle and the collecting pole of the electrospinning device are placed in a hypoxic environment for electrospinning. Spinning, in the process of electrospinning, the ultraviolet light source is used to irradiate the jet ejected from the spinning nozzle, and the light-curing material micro-nano fibers can be collected on the collecting pole of the electrospinning device. The method is simple to operate, effectively avoids the environmental pollution caused by the volatilization of organic solvents, is safe and environmentally friendly, and is suitable for large-scale production of micro-nano fibers of light-curing materials. The fibers are generally short and irregular, the curing is incomplete, and the technical problems that cannot be mass-produced.

The invention discloses a water-washable letterpress photosensitive resin composition and its products. Its main feature is that the photosensitive resin is a hydrophilic polyamide resin modified by a mercapto compound, and the mercapto compound includes: alkyl mercaptan, sulfur Alcohol esters, aryl mercaptans, etc., use the mercapto groups and the ethylenic unsaturated bonds of the surrounding active monomers for photocuring during exposure, which can effectively overcome oxygen inhibition and simplify the steps of "debonding" and "post-exposure". On the other hand, the cracking-type and hydrogen-extracting-type compound photoinitiators are used in the resin composition, and the photosensitive wavelength ranges of different photoinitiators are fully utilized to complement each other and improve the utilization efficiency of ultraviolet light. The photosensitive resin composition prepared by the above method is applied in water-washing letterpress, and has good sensitivity, dot reduction ability and image-text flushability.

The present invention discloses a UV-curing-based solvent-free electrostatic spinning apparatus. The apparatus comprises a high voltage power supply, a liquid storage mechanism, a spinning nozzle, an oxygen isolating mechanism, an ultraviolet light source and a collector; the anode of the high voltage power supply is connected with the spinning nozzle; the spinning nozzle is communicated with the liquid storage mechanism for storing spinning precursor solution; the collector is connected with the cathode of the high voltage power supply or directly grounded; the oxygen isolating mechanism comprises a sealing box, the inside of which is anoxic or mionectic; the spinning nozzle and the collector are positioned in the sealing box; the ultraviolet light source is positioned in the sealing box or ultraviolet light emitted by the ultraviolet light source can enters into the sealing box; and the ultraviolet light source can irradiate space between the spinning nozzle and the collector. The apparatus can be used for continuously preparing photo-curing material micro-nano fiber in batches. The apparatus is simple in operation and safe and environment-friendly, environmental pollution caused by organic solvent volatilization can be effectively avoided, and the apparatus is especially suitable for large-scale commercial production of the photo-curing material micro-nano fiber.

The invention belongs to the field of organic functional materials, and particularly relates to a heteropolycyle compound having photo-activity and a preparation method thereof, wherein the structureof the compound is represented as the formula (I). The heteropolycyle compound in the invention has excellent photo-activity, wherein the compound has a large specific surface area due to the heteropolycyle structure, so that oxygen inhibition is effectively overcome. The compound, used for initiating polymerization of a monomer, is high in conversion rate. The preparation method is gentle in reaction conditions, wherein the reactions are carried out under normal pressure, so that the method is simple in operation; the method employs accessible raw materials, is low in cost, is environment-friendly and pollution-free, and is suitable for large-scale industrial production.

The invention relates to a method for realizing different post-press processing effects on the surface of printed matter by using a variable data ink-jet printing method. The method of the present invention includes the following steps: 1) printing synergistic ink on surface A to form synergistic graphics; 2) drying the synergistic graphics; Pressing to form a complex; 4) UV curing the complex; 5) separating the complex. The method of the present invention is easy to operate, environmentally friendly and safe, and the process is simple. It is also suitable for absorbing or non-absorbing substrates, and can meet the needs of hot stamping on the surface of printed matter, local UV glazing, 3D grating, laser, embossment, shiny particle decoration, etc. Post-press digital enhancement needs.

The invention discloses a photocureable coating for teaching blackboards, which is composed of the following components: aliphatic polyurethane triacrylate, 1, 6-hexanediol diacrylate, ethylene glycol diglycidyl ether, alkyl modified organosiloxane, butyl hydroxytoluene, organic thermosetting polymethylurea resin, 4-acryloyl morpholine, 2-hydroxy-2-methyl-1-phenyl-1-acetone, sulfonyloxy ketone, Pigment BK7 and castor oil polyglycidyl ether. According to the photocureable coating for the teaching blackboard, the oxygen inhibition phenomenon of the photocureable coating is effectively avoided, the printing precision is high, and the photocureable coating for the teaching blackboard is high in curing hardness, high in adhesive force to a base material and resistant to scraping.