17results about How to "Promote curing reaction" patented technology

The invention discloses a super-amphiphobic anti-waxing epoxy composite coating as well as a preparation method and application thereof. The preparation method comprises the following steps: firstly, modifying nano silicon dioxide by fluorine-containing silane to obtain fluorine-containing silane modified nano silicon dioxide; preparing a fluorine-containing modifier with an epoxy group through a mercapto-alkene click reaction, blending the fluorine-containing modifier with epoxy resin to obtain modified epoxy resin, and finally blending the fluorine-containing silane modified nano silicon dioxide with the modified epoxy resin to obtain the composite coating. The water and diesel oil contact angles of the composite coating prepared from the composite coating are both larger than 150 degrees, the rolling angle is smaller than 5 degrees, the composite coating has super-amphiphobic performance, the anti-wax precipitation efficiency is larger than or equal to 75%, the adhesive force of the coating is smaller than the first level, the salt spray resistance time is larger than 1200 h, and the stability is good.

The invention relates to the technical field of refractory materials, in particular to a preparation method of a self-curing tundish dry material, which comprises the following steps of: mixing, forming, drying, sintering, cooling and grinding raw materials of the tundish dry material, and mixing the obtained tundish dry material bulk material and a gel material according to a preset proportion; the tundish mold is filled with the fireproof bulk materials obtained through mixing, layered filling is adopted, vibration and degassing treatment are conducted on each layer of fireproof bulk materials to obtain a degassed fireproof solid material, curing treatment is conducted on the degassed fireproof solid material to obtain a cured fireproof layer, and the curing strength of the cured fireproof layer is detected to obtain the actual curing strength; and for the condition that the actual curing strength cannot meet the standard curing strength requirement, the standard curing strength requirement is met by adjusting vibration parameters or adjusting grinding power. By adjusting the grinding power and the vibration parameters, the curing strength of the self-curing tundish dry material meets the curing requirement.

The utility model discloses a coating composite all-in-one machine, relates to composite board technical field, including all-in-one machine shell, all-in-one machine shell inner bottom surface is equipped with concave frame, second support leg inner bottom surface is equipped with the chute, the surface of chute is in sliding connection with slider, the upper surface of push block is equipped with first telescopic pole, and the upper surface of push block is equipped with second telescopic pole. A pneumatic glue injection gun is installed on the lower surface of the glue box, a nozzle is arranged at the glue outlet end of the pneumatic glue injection gun, a heating plate is installed on the lower surface of the lifting frame, third pneumatic telescopic rods are installed on the two side faces of the lifting frame, and clamping blocks are fixedly connected to the telescopic ends of the third pneumatic telescopic rods. Through the arrangement of the concave frame, the push block, the push plate, the telescopic block, the pneumatic glue injection gun, the lifting frame, the third pneumatic telescopic rod, the clamping block, the heating plate and the PLC, the purpose of improving the working efficiency is achieved.

The invention discloses a magnesium-aluminum alloy casting coating and a preparation process thereof. The casting coating comprises a prime coating and a surface coating, the prime paint is prepared from the following raw materials in parts by mass: prime aggregate, an alcohol solvent, a flatting agent and a dispersing agent; the bottom layer aggregate is mixed aggregate of magnesia powder and refractory aggregate; the surface layer coating is prepared from the following raw materials in parts by mass: surface layer aggregate, a binder, a suspending agent, a dispersing agent and water. According to the casting coating disclosed by the invention, magnesia powder adopted by the prime coating is mixed with refractory aggregate with a specific particle size, aggregate with a specific particle size is adopted by the surface coating, and the curing speed and uniformity of the coating are improved through the synergistic effect of the prime coating and the surface coating in combination with specific raw material proportioning and process; the consistency and the reliability of the coating performance are ensured, the problems of high cooling speed and local advanced crystallization in the magnesium alloy casting process are effectively solved, and the overall performance and the production efficiency of castings are improved.

The invention relates to a resin composition as well as a preparation method and application thereof. The resin composition comprises mixed resin, an accelerant and curing agents, the mixed resin comprises epoxy resin and functional resin, the functional resin comprises polar groups with the dipole moment larger than 0.7, the mass fraction of the polar groups in the functional resin is 3%-15%, and the curing agents comprise a medium-temperature curing agent and a low-temperature curing agent. The resin composition can be rapidly cured at the temperature of 120 DEG C or below, meanwhile, a prepreg prepared from the resin composition is excellent in latency, and a composite material further prepared from the resin composition has excellent heat resistance.

A self-catalytic imide ring-containing phthalonitrile resin and a preparation method and application thereof, relate to the technical field of aromatic heterocyclic resins, and specifically to a self-catalytic imide ring-containing phthalonitrile resin and a preparation method and application thereof. It is necessary to solve the problems of high melting point, inappropriate curing speed and complicated preparation process of existing self-catalytic phthalonitrile resins. Unsaturated double bonds and imide rings are introduced into the structure of the self-catalytic imide ring-containing phthalonitrile resin, and dimethyl is introduced on the benzene ring at the same time. Method: 4-amino-3,5-xylenol, 4-nitrophthalonitrile and anhydrous potassium carbonate are stirred in a non-protonic solvent, reacted, the product is washed with water, and dried to obtain 4-(4-amino-3,5-dimethylphenoxy)phthalonitrile; then glacial acetic acid is added, heated to reflux, cooled to precipitate the product, washed with water, and dried to obtain the target product. The resin has a moderate curing speed and a relatively low melting point. The resin of the present invention is used for modifying epoxy resins.

The present invention provides a hot-melt benzoxazine resin composition, a prepreg, a composite material and a preparation method thereof, wherein the hot-melt benzoxazine resin composition comprises the following components by weight: 30-80 parts of benzoxazine resin, 10-50 parts of epoxy resin, 10-30 parts of toughening agent, 2-15 parts of flame retardant, 10-25 parts of curing accelerator and 1-15 parts of epoxy diluent. The hot-melt benzoxazine resin composition, prepreg, composite material and a preparation method thereof have the characteristics of high heat resistance, strong mechanical properties, good flame retardancy, low product porosity and the like, and meet the requirements of aviation applications.

The present invention discloses an intelligent all-round photosensitive 3D printing secondary curing device, comprising a stand and a processing cylinder, the stand is slidably connected to a lifting frame, a loading tray is fixed under the lifting frame, and a plurality of suction nozzles are distributed circumferentially under the loading tray; the processing cylinder is concentric with the loading tray, a plurality of supporting springs are provided at the bottom of the processing cylinder, and a vibration motor is also provided at the bottom of the processing cylinder; compared with the prior art, the present invention improves curing efficiency and quality, optimizes surface finish and aesthetics, enhances workpiece performance and stability, reduces processing dead angles and improves uniformity, improves the degree of automation and ease of operation, and improves environmental protection and energy saving, and shows remarkable effects.

The invention discloses an epoxy resin coating as well as a preparation method and application thereof. The epoxy resin coating comprises the following components in parts by weight: 80-120 parts of epoxy resin, 40-60 parts of a curing agent, 10-20 parts of filler, 5-10 parts of a catalyst and 20-40 parts of a solvent, the curing agent is prepared from 2-amino-4-sulfonamide phenol and octopamine according to the weight ratio of 1 to (0.5 to 2.5). The epoxy resin coating prepared by the invention can be cured at 100 DEG C or below, and still has good wear resistance and aging resistance.

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 .

The invention discloses a coating as well as a preparation method and application thereof and a coated product. According to the coating provided by the invention, the epoxy resin is cured by utilizing the polysilazane compound, so that the corrosion resistance and the high-temperature resistance of the coating can be remarkably improved: the main chain of the polysilazane compound contains an N-H bond, so that the curing reaction of the epoxy resin can be promoted, and the crosslinking density of the epoxy resin is improved; a side group contains at least one of a benzene ring and a naphthalene ring, the overall temperature resistance of an epoxy resin cured product is improved through a skeleton conjugation effect, and the side group contains a C1-C10 long straight-chain alkane group which can also provide better processability for polysilazane. The epoxy resin is obtained by reasonably proportioning bisphenol A epoxy resin, novolac epoxy resin and hyperbranched epoxy resin, and the crosslinking degree of the resin can be increased, so that the thermal stability of the resin is improved. A coating layer formed by the coating has the characteristics of high density, high heat resistance, high moisture resistance and high adhesion, and can meet the requirements of extreme environments such as high humidity and heat, salt spray corrosion and the like.

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 present invention relates to a bio-based coating and a preparation method thereof. Specifically, the present invention provides a bio-based coating, which is composed of the following components: 40-50 parts of bio-based polyurethane, 20-30 parts of chitosan-modified graphene oxide, 1-3 parts of surfactant, 1-2 parts of leveling agent, and 50 parts of solvent. Wherein the bio-based polyurethane is synthesized by condensation of castor oil, diphenylmethane-4,4'-diisocyanate and 2,6-diaminopyridine. The present invention synthesizes bio-based polyurethane by condensation of castor oil, diphenylmethane-4,4'-diisocyanate and 2,6-diaminopyridine, and a large number of cross-linked hydrogen bonds can be formed between the urea groups contained in the obtained bio-based polyurethane, which has good mechanical strength and self-repairing function, and chitosan-modified graphene oxide is added to the coating. On the one hand, chitosan can prevent graphene oxide from self-aggregating in the coating, and on the other hand, the addition of graphene oxide significantly improves the mechanical properties and antifouling properties of the coating.

The invention relates to luminous geopolymer mortar for a building outer wall and a preparation method thereof, and belongs to the technical field of inorganic cementing materials, the luminous geopolymer mortar for the building outer wall is composed of a powder material and a liquid material, and the powder material and the liquid material are used after being uniformly mixed according to the mass ratio of (13-20): 10; according to the luminous geopolymer mortar for the building outer wall, the 28-day compressive strength is 57.1-60.4 MPa, the 28-day breaking strength is 11.2-13.4 MPa, the 28-day dry shrinkage rate is 0.08-0.13%, the 28-day tensile bonding strength is 3.4-3.8 MPa, the 100-time circulation compressive strength loss rate in the aspect of freeze-thaw resistance is 0.9-1.5%, the 100-time circulation tensile bonding strength loss rate is 1.1-1.6%, the afterglow time is 1507-1618 min, and the luminous intensity is 1843-1909 mcd / m < 2 >.

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.

The present application discloses a UV light-curable ink and a method for using the same in manufacturing a flexible printed circuit board. Specifically, the method comprises the following steps: preparing an ink mixture; applying the ink to the flexible printed circuit board, and then sequentially drying, pre-baking, exposing, and developing the ink; and UV curing the treated flexible printed circuit board, first using ultraviolet light and visible light alternately. The method described in the present invention can solve the problem of incomplete curing in thicker coatings. The product of the present invention has good flexibility and stability in complex processing, and is particularly suitable for applications requiring thicker coatings.