58results about How to "Avoid oxygen inhibition" patented technology

The invention relates to the technical field of coatings and particularly relates to an elastic-feeling coating. Ultraviolet (UV) light-cured elastic-feeling paper gloss oil is composed of the following components in parts by weight: 18-22 parts of UV elastic resin, 22-28 parts of monomer, 8-12 parts of active amine, 3-7 parts of photoinitiator, 5-10 parts of elastic powder, 3-7 parts of gas phase silica matting powder, 0.5-2 parts of assistant and 22-26 parts of solvent, wherein the monomer is a mixture of isobornyl acrylate and 1,6-hexanediol diacrylate. The ultraviolet light-cured elastic-feeling paper gloss oil provided by the invention is suitable for high-speed roller coating, thereby improving the working efficiency, reducing the coating operation difficulty and avoiding personal injury.

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 conductive micro-nanometer fiber stranded wire based on solvent-free electrospinning and a preparing method thereof. The conductive micro-nanometer fiber stranded wire comprises a photocuring material template stranded wire and a conductive macromolecule layer. The photocuring material template stranded wire is formed by winding micro-nanometer fiber cured by solvent-free electrospinning ultraviolet light. The conductive macromolecule layer is manufactured through an in-situ polymerization method and comprises conductive macromolecule layer bodies permeating into the template stranded wire and wrapping the template stranded wire. According to the conductive micro-nanometer fiber stranded wire, conductivity of the fiber stranded wire is further improved while excellent stretchability is kept, organic solvent does not need to be added in the electrostatic spun yarn preparing process, the preparing process is safer and more environmentally friendly, and the stranded wire is suitable for large-scale production.

The invention relates to a thioxanthone photoinitiator containing sulfydryl and initiator aid amine and a preparation method of the thioxanthone. The preparation method comprises the following steps: by using a thioxanthone derivative containing an epoxy group as a raw material, firstly, converting the epoxy group into a circular thiocarbonate group by adding carbon disulfide which is reacted with the thioxanthone derivative containing the epoxy group; and then, carrying out a ring-opening reaction with amine containing a benzene ring to obtain the thioxanthone photoinitiator containing sulfydryl and initiator aid amine, wherein the obtained compound is of a good photo-initiating effect; R1, R2 and R3 are independently selected from hydrogen, halogen, hydroxyl, and C1-C22 alkyl; R4 is selected from H, C1-C2 alkane groups or benzyl; and R5 is selected from aromatic alkyls such as benzyl, phenethyl, phenylpropyl, and phenylbutyl containing benzene rings.

The invention discloses a UV-curable electrospun colored micro-nanofiber stranded wire and its preparation method. Micro-nanofiber for being twisted into the stranded wire is colored. The micro-nanofiber contains a photo-curing polymer material and color phototherapy gel. The micro-nanofiber is prepared from a solvent-free electrospinning precursor solution. The electrospinning process is carried out in a mionectic UV-irradiation environment. The electrospinning precursor solution contains a liquid prepolymer of a photo-curing material, a photoinitiator and phototherapy gel, and contains no organic solvent. The stranded wire has rich and full colors, has good color fastness, is not easy to fade and has good tensile mechanical property. Meanwhile, there is no need to add an organic solvent during the electrospinning preparation process. The preparation process is safer and more environmentally-friendly. The preparation method is suitable for large-scale production.

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 the field of optical counterfeiting prevention, and discloses a protective ultraviolet curing coating composition with the solid content being 100%, a coating prepared from the same, and application of the coating. The coating composition comprises, on the basis of taking the total weight of the coating composition as a reference, 58-88 wt% of a component not containing hydroxyl and capable of being subjected to cationic curing, 5-20 wt% of a component containing hydroxyl and capable of being subjected to cationic curing, 2-12 wt% of a component capable of being subjected to free radical curing, 1-6 wt% of a surface modification component capable of being subjected to free radical curing, and 2-10 wt% of a composite initiation system of a cationic initiator and a free radical initiator. The coating composition has the characteristics of low viscosity and high curing speed; and through the formed protective coating, chemical resistance, bending resistance, scratch resistance and stain resistance of an optical anti-counterfeiting product can be obviously improved, and thus the circulation life of the optical anti-counterfeiting product is prolonged.

The invention discloses a photosensitive resin composition and a water washing resin plate. The photosensitive resin composition comprises the following ingredients in parts by mass: 55-75 parts of sulfydryl modified PVA (polyvinyl alcohol) resin, 60-80 parts of solvent, 22-45 parts of active monomer, 2-10 parts of plasticizer, 1-3 parts of photoinitiator, 0.01-0.05 parts of polymerization inhibitor and 0-0.1 parts of other assistant, wherein sulfydryl accounts for 0.5-10wt% of the sulfydryl modified PVA resin; and a degree of saponification of the PVA resin is 60-95mol%. Sulfydryl modified PVA is used as matrix resin in the photosensitive resin composition; sulfydryl and a carbon-carbon double bond of the active monomer are subjected to 'sulfydryl-ethylene' photocuring; oxygen inhibitioncan be effectively overcome; and steps of 'viscosity removal' and 'post exposure' in a platemaking process are simplified.

The invention belongs to the field of photosensitive polymer materials. After the hydrogen abstraction type photoinitiator absorbs light energy, bimolecular interaction occurs with the co-initiator in the excited state to generate active free radicals and initiate monomer polymerization. The inhibitory effect of oxygen molecules on free radical polymerization cannot be ignored. The present invention utilizes raw materials such as 4‑methylbenzophenone, N‑bromosuccinimide, different amines, and 1‑hydroxycyclohexyl phenyl ketone (184) to prepare a class of Polyfunctional one-component hydrogen abstraction photoinitiator. The invention has simple synthesis steps, low preparation cost, good solubility of the product, can directly replace benzophenone as a photoinitiator, has better performance than benzophenone, and has wide application prospects in the field of ultraviolet light curing.

The invention relates to a visible light curing coating and a preparation method thereof. The visible light curing coating comprises the following components in parts by weight: 100 parts of an acrylate compound and a vinyl ether compound, 0.01-2 parts of a fluorescent dye, 0.5-3 parts of a tertiary amine compound and 0.5-3 parts of a chlorotriazine photoinitiator, wherein a mass ratio of the acrylate compound to the vinyl ether compound is 4: 6 to 6: 4. According to the invention, the acrylate compound and the vinyl ether compound are used as a coating main body, and free radical polymerization reaction initiated by a ternary photo-initiation system consisting of the fluorescent dye, the tertiary amine compound and the chlorotriazine photoinitiator not only can overcome the oxygen inhibition phenomenon, but also has the advantages of low cost, no toxicity, rapidness and high efficiency, so the curing efficiency of acrylate and vinyl ether is greatly improved, and the coating with good quality can be obtained; and the coating has the advantages of being high in strength, good in adhesive force, good in thermal stability and the like, and the applicability of the coating is greatly improved.