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 aims to provide a PVC (polyvinyl chloride) coating cured by using a UV (ultraviolet)-LED (light-emitting diode) light source and a preparation method of the PVC coating. The coating is prepared from the following raw materials by weight percent: 40-50% of polyurethane acrylate, 5-15% of modified acrylate oligomer, 5-10% of hyperbranched acrylate oligomer, 30-40% of acrylate reactive diluent, 3-7% of photoinitiator, 0.2-0.4% of auxiliary and 0-20% of color filler. The PVC coating has the advantages that the coating can be fast cured under the UV-LED light source, and has good adhesive force on PVC. The problems of slow curing speed and poor surface dryness of a photocured PVC coating under the UV-LED light source are completely solved.

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 belongs to the field of coatings, and specifically relates to a room temperature self-repairing coating and a preparation method thereof. The coating material includes the following raw materials in parts by weight: 60-80 parts of self-repairing polythiourethane resin matrix, 15-25 parts of photocurable resin 10-20 parts of photocurable monomer diluent, 2-5 parts of photoinitiator. The coating material of the present invention effectively improves the defects of existing self-healing coatings such as low self-healing rate, limited number of repairs, and the use of external energy or healing agents, and has the characteristics of anti-fouling, abrasion resistance, and impact resistance. Good overall performance advantages.

The invention relates to the field of optical anti-counterfeiting, and discloses a protective ultraviolet light curing coating composition with 100% solid content and its coating and application, wherein, based on the total weight of the coating composition, the coating composition includes 58 ‑88wt% cationically curable component not containing hydroxyl groups, 5‑20wt% cationically curable component containing hydroxyl groups, 2‑12wt% free radical curable component, 1‑6wt% free radical curable Cured surface modification components, and a compound initiation system of 2-10wt% cationic initiator and free radical initiator; the coating composition has the characteristics of low viscosity and fast curing speed. The formed protective coating can significantly improve the chemical resistance, bending resistance, scratch resistance and stain resistance of optical anti-counterfeiting products, thereby prolonging the circulation life of optical anti-counterfeiting products.

The invention discloses a low-energy UV-curable polyurethane acrylate prepolymer, a preparation method thereof, and a UV-curable coating. In parts by weight, the raw materials of the prepolymer include: 100 parts of diol polymer, 35-150 parts of diisocyanate 6-37 parts of carboxyl-containing chain extender, 5-40 parts of acrylate end-capping agent, 3-30 parts of mercaptan end-capping agent, 0.1-0.5 parts of polymerization inhibitor, and 0.1-0.5 parts of organotin catalyst. The prepolymer provided by the invention contains a mercapto group, which can effectively overcome oxygen inhibition, requires less energy for curing, and at the same time, the carboxyl group can inhibit the Michael addition reaction of the mercapto group and acrylate. The prepolymer has the advantages of fast UV curing speed, good toughness and stable storage.

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.