36results about How to "Fast cross-linking and curing" patented technology

The invention relates to a preparation method of a pressure-sensitive adhesive, and particularly relates to a preparation method of a solvent-free ultraviolet-curable organosilicone-modified pressure-sensitive adhesive. The method comprises the steps of: preparation of an organosilicone-modified polyurethane acrylate prepolymer and preparation of the pressure-sensitive adhesive. The pressure-sensitive adhesive is free of any organic solvents, and can be coated at normal temperature, dried without heating and rapidly cross-linked and cured.

The invention provides a metal glitter paint: calculated in parts by mass, its raw materials include 30-40 parts of epoxy resin, 8-15 parts of aluminum silver paste, 8-12 parts of polyamide wax liquid, 5-12 parts of amino resin, 25-35 parts of organic solvent; the molecular structure of epoxy resin includes pyrrolidone ring. Aluminum silver paste is easily dispersed in the epoxy resin adopted in the present invention and has good dispersion stability, and its reason may be that the pyrrolidone ring in the epoxy resin adopted in the present invention can form a complex with the aluminum powder in the aluminum silver paste , so as to prevent the aggregation and settlement of metal particles, and at the same time inhibit the formation of metal salts between metal particles and resin, so as to avoid the resin from agglomerating into blocks.

The invention discloses a self-layered gradient fluorine-silicon-based superhydrophobic coating and a preparation process thereof. The self-layered gradient fluorine-silicon-based superhydrophobic coating material is composed of A component and B component, and the A component is composed of fluorine-silicon Resin, dilution solvent, dispersion solvent, modified nano-SiO 2 Powder, modified nano silica sol, coupling agent, defoamer and leveling agent, the B component is aliphatic polyisocyanate. The method can solve the shortcomings in the prior art such as complex preparation process of the superhydrophobic coating, long drying time, high cross-linking and curing temperature, and double layers on the bottom surface. The water contact angle of the superhydrophobic coating prepared by the invention can reach more than 151°, and the rolling angle is about 3°. The preparation process is simple and easy, no expensive and complicated equipment is needed, and adhesion, superhydrophobicity, and good flexibility are taken into account.

The invention discloses a polycarbodiimide crosslinking agent, its preparation method, application and composition containing it. The polycarbodiimide crosslinking agent comprises a compound shown in formula (1) and a water-soluble organic solvent; wherein: in the compound shown in formula (1), R 1 It is a divalent aliphatic hydrocarbon group with 1-18 carbon atoms or a divalent alicyclic hydrocarbon group with 3-13 carbon atoms, R 2 It is a divalent aliphatic hydrocarbon group with 1-10 carbon atoms, R 3 is H, an alkyl group with 1-5 carbon atoms or an alkoxy group with 1-5 carbon atoms, and n is 1-10. The polycarbodiimide crosslinking agent provided by the present invention has high reactivity at room temperature, can quickly crosslink and solidify, and has broad application prospects in the field of water-based coatings / adhesives.

The invention relates to a preparation method for a grain size controllable monodisperse polyvinyl alcohol gel microsphere. The preparation method comprises the following steps: preparing a disperse phase solution and a continuous phase solution; controlling the flowing speed, flow and viscosity of the disperse phase and the continuous phase; obtaining polyvinyl alcohol solution drops in different grain sizes and in uniform diameter size after converging the disperse phase with the continuous phase; and solidifying the drops, thereby obtaining the grain size controllable monodisperse polyvinyl alcohol gel microspheres. The invention also relates to a preparation device for the grain size controllable monodisperse polyvinyl alcohol gel microsphere and the prepared monodisperse polyvinyl alcohol gel microsphere. The microsphere prepared according to the invention has a better surface morphology and a grain size range of 50-600 microns. The preparation device is convenient to assemble and disassemble; the size controllable preparation for a monodisperse polyacrylamide microsphere is realized by changing the size of a capillary tube or controlling the flowing speed or viscosity of the disperse phase and the continuous phase; and the grain size distribution coefficient CV is less than 5%.

The invention discloses a polyacrylate pressure-sensitive adhesive emulsion for a polyethylene protection film and a preparation method thereof. The environment-friendly pressure-sensitive adhesive emulsion employs a single component, can realize good cross-linking and curing only through heating and drying without addition of other cross-linking agents and uses a polymerization type emulsifier to reduce a variety of adverse problems caused by emulsifier migration. The environment-friendly pressure-sensitive adhesive disclosed in the invention has good adhesion on the polyethylene film and can realize good balance among initial viscous force, peeling strength and cohesive force.

The invention discloses Pt / C / PTFE (Polytetrafluoroethylenetype) type hydrophobic catalyst microspheres with the controllable particle diameterd and a preparation method of the Pt / C / PTFE type hydrophobic catalyst microspheres. The preparation method is characterized by comprising the following steps: respectively preparing a dispersed-phase solution and a continuous-phase solution, introducing the dispersed-phase solution into a capillary tube, cutting the continuous-phase solution by using the dispersed-phase solution to form dispersed-phase solution droplets with uniform sizes, controlling the particle diameters of the dispersed-phase solution droplets by changing the size of the capillary tube, the flow of the dispersed-phase solution, the flow of the continuous-phase solution or the viscosity of the continuous-phase solution, curing and sintering the dispersed-phase solution so as to obtain the Pt / C / PTFE type hydrophobic catalyst microspheres. The prepared microspheres have the advantages that the spherical degree is good, the size is uniform, the particle-diameter range is 150-1500mum, the dispersion coefficient CV is less than 5%, the hydrophobic characteristic and the porous characteristic are achieved, and simultaneously the adjustment and the control of the particle diameters of the Pt / C / PTFE type hydrophobic catalyst microspheres are also realized.