4results about How to "Promote curing reaction" patented technology

The application discloses a COF modified blue dye, a lens coating, a lens and a preparation method and application thereof, and belongs to the technical field of resin lenses. The preparation method of the COF modified blue dye comprises the following steps: step one, preparation of COF powder; and step two, preparation method of the COF modified blue dye: 1 part by weight of the COF powder is dispersed in 5-10 parts by weight of a 5-8 wt% HCl aqueous solution to obtain a COF dispersion liquid; 1-3 parts by weight of a blue dye is dissolved in 10-30 parts by weight of DMSO, and a blue dye dispersion liquid is obtained after uniform mixing; the COF dispersion liquid and the blue dye dispersion liquid are uniformly mixed, and then a polydimethylsiloxane stabilizer is added; and after freeze-drying and crushing, the COF modified blue dye is obtained. The lens coating obtained by the application has the advantages of uniform dispersion of the blue dye, excellent reflection of blue light, clear vision without distortion, no problems of spots and flow marks, high yield and suitability for industrial mass production.

This invention discloses a method for preparing epoxy resin, comprising the following steps: uniformly mixing a toughening agent and a curing agent to obtain a compound, wherein the curing agent is methylhexahydrophthalic anhydride and the toughening agent is ZIF-8; preheating bisphenol A type epoxy resin E51 at 60-80℃ for 15-20 min to obtain a pretreated epoxy resin; mixing the pretreated epoxy resin with the compound at 60-80℃; adding a defoamer and an accelerator under stirring; reacting at a constant temperature of 60-80℃ for 5-8 min to obtain a mixture; vacuum degassing the mixture, curing, and demolding to obtain the epoxy resin. The preparation method of this invention utilizes the synergistic effect of 2,4,6-tris(dimethylaminomethyl)phenol and ZIF-8 to toughen the epoxy resin, resulting in an epoxy resin with excellent mechanical properties, with an impact strength reaching up to 28.24 KJ / m². 2 .

This invention discloses a high thermal conductivity electrical casting refractory and its preparation method. The casting refractory contains, by weight: 75-90 parts inorganic filler, 7-13 parts bisphenol A type liquid epoxy resin, 2-5 parts aliphatic diglycidyl ether reactive diluent, 7-13 parts alicyclic anhydride curing agent, 0.2-1.2 parts monoalkoxy type titanate coupling agent, and 0.01-0.5 parts curing accelerator. The inorganic filler is a gradient particle size compound, comprising 80%-95% large-particle-size (500-2000 μm) quartz sand and 5%-20% small-particle-size (23-120 μm) alumina, modified by the coupling agent. The modified inorganic filler is mixed with resin, diluent, curing agent, and accelerator, and after degassing under reduced pressure, cured in stages at 80℃-160℃. This invention constructs a continuous thermal conductivity path with a thermal conductivity ≥2.0 W / (m·K) after curing. It also features high insulation, high mechanical strength, excellent heat resistance and flame retardancy. The process is simple and low-cost, and it is suitable for electrical equipment such as busbars, instrument transformers, and transformers.

The utility model discloses a combined type laminating device for leather processing, which relates to the technical field of leather processing equipment and comprises a workbench, a fixed seat is welded and mounted in the middle of the upper end face of the workbench, a mounting frame is mounted in the fixed seat, a movable compression roller is rotatably mounted in the mounting frame, and the movable compression roller is rotatably mounted in the workbench. A groove is formed in the position, corresponding to the lower portion of the movable pressing roller, of the workbench, a fixed pressing roller is rotationally installed in the groove, a hydraulic lifting device is fixedly installed at the top end of the fixed base, a pressing table which is in sliding limiting with the workbench is arranged at the rear end of the fixed base, and electric push rods are installed on the two sides of the pressing table. A mounting base is arranged above the pressing table, an ultrasonic pressing assembly is arranged in the mounting base, and the problems that after different leather materials are compounded through the laminating device, permeation and diffusion of an adhesive and leather fibers are insufficient, and air is prone to being left on an interface to form bubbles and hollowing are solved.