66results about How to "Fast curing reaction" patented technology

Broadly, the invention provides for newly available bio-derived formaldehyde free furanic materials for aggregate binding. The specific example case is aggregate binding for forms used in the metal casting process. The new materials make possible higher productivity and lower phenol, formaldehyde, urea, and/or furfuryl alcohol content in the metal casting form-making process. It is expected that the formulations will work well in other aggregate binding situations as well.

The invention provides a high-performance thermosetting epoxy resin adhesive for roads and bridges. The adhesive comprises a component A and a component B, wherein, the component A comprises the following components in parts by mass: 100 parts of epoxy resin, 25 to 33 parts of flexibilizer, and 5 to 10 parts of diluent; the component B comprises the following components in parts by mass: 80 to 120 parts of curing agent, 5 to 10 parts of accelerant, 0.5 to 2 parts of coupling agent, 1 to 10 parts of reinforcing agent, and 0.2 to 0.5 part of antifoaming agent; and the ratio of the component A to the component B is 100:100-100:120. According to the adhesive, a flexible long-chain aliphatic amine serving as the curing agent has a curing reaction with the epoxy resin to form a solid crosslinking structure, so that the epoxy resin adhesive is high in adhesion capability and water resistance; The toughness of the epoxy asphalt adhesive is improved by adopting the soybean oil-based polyurethane to be adapted to the flexibility of a steel plate, and the soybean oil-based polyurethane containing massive hydroxyl has good compatibility with the epoxy resin. The adhesive is applicable to adhesion and waterproofing of steel bridge decks, viaducts, cement concrete bridge decks, tunnels, expressways and other decks. The invention discloses a preparation method of the high-performance thermosetting epoxy resin adhesive.

The invention provides a two-component polyurethane coating, comprising an A component and a B component, wherein the A component comprises fatty acid-type alkyd resin, cellulose, zinc stearate, talcum powder, anti-settling agent, anti-foaming agent, flatting agent, drier and solvent; the B component comprises toluene diisocyanate (TDI) trimer, toluene diisocynate additive product and solvent. The invention also provides a preparation method of the two-component polyurethane coating. The two-component polyurethane coating takes saturated fatty acid-type alkyd resin as main film-forming substance, adds the cellulose and mixes with TDI trimer and TDI additive product as curing agent, so as to be helpful for accelerating the drying of the coating and ensure the mechanical properties of the film. The two-component polyurethane coating provided by the invention has short polishing time which is not more than 1.5 h, excellent film mechanical property, and achieves H-level hardness and 1-level adhesive force.

Broadly, the invention provides for newly available bio-derived formaldehyde-free furanic materials for aggregate binding. A specific example is aggregate binding for forms used in the metal casting process. The inventive binder formulations involve the use of 2,5-furan dimethanol and other “filler” components for high productivity and fast tensile development without formaldehyde, urea, urea-formaldehyde or formaldehyde containing compositions.

The invention relates to a bi-component composite adhesive for a solar power back panel, and a preparation method thereof. The adhesive consists of a component A and a component B, wherein the component A mainly comprises dipropylene glycol, hydroxypivalyl hydroxypivalate, 2,4-diethyl-1,5-pentanediol, terephthalic acid, phthalic anhydride, 1,12-dodecanoic acid, a hydrolysis-resistant stabilizing agent, ethyl acetate and a small amount of organotin catalyst, and the component B is an aliphatic polyisocyanate curing agent; the weight ratio of the component A to the component B is (10-16): 1. According to the bi-component composite adhesive, through a simple esterification synthesis reaction, high-hydrophobicity dibasic alcohol and long-carbon-chain dibasic acid are introduced to prepare polyester polyol which is good in temperature resistance and hydrolysis resistance; through the addition of the catalyst and the hydrolysis-resistant stabilizing agent, the curing reaction speed of the adhesive is further accelerated, and the hydrolysis resistance of the cured adhesive is further improved. The composite adhesive prepared by the invention is applied to the solar power assembly back panel to endow the solar power assembly back panel with better UV resistance, hydrolysis resistance and aging resistance.

The invention provides a photocurable adhesive, a preparation method and application thereof. The photocurable adhesive is prepared from acrylate-terminated hyperbranched polyester, polyurethane acrylate, epoxy resin, a reactive diluent, a silane coupling agent, a photoinitiator and a photosensitizer, wherein the reactive diluent comprises an acrylate reactive diluent and an epoxy compound reactive diluent, and the photoinitiator comprises a free radical photoinitiator and a cationic photoinitiator. Acrylate-terminated hyperbranched polyester, polyurethane acrylate and epoxy resin are taken asreaction monomers, the acrylate reactive diluent and the epoxy compound reactive diluent are compounded to form a mixed diluent, and under the action of a free radical photoinitiator and a cationic photoinitiator, a cationic and free radical dual-curing system can be carried out, and moreover, the compatibility of the components in the system is good, and the prepared adhesive is relatively goodin overall performance.

The invention belongs to the technical field of chemical synthesis and particularly provides a dicyandiamide type epoxy resin curing agent and a preparation method and application thereof. The dicyandiamide type epoxy resin curing agent comprises a compound of the structure shown in formula I. The curing agent is structurally a dicyandiamide derivative type, can be dissolved in multiple types of organic solvent and mixed solvent, contains various curing groups, can conduct a curing reaction with epoxy resin rapidly and lowers the curing temperature. The compound serves as a latent curing agent for obtaining a one-component adhesive, a cure product after curing is good in heat resistance, and the mechanical property is remarkably improved as well compared with dicyandiamide.

The invention relates to a halogen-free thermosetting resin composition and a prepreg and a printed circuit laminate employing the halogen-free thermosetting resin composition. An organic condensate of the halogen-free thermosetting resin composition comprises the ingredients in parts by weight (based on 100 parts): (A) 5-50 parts of cyanate resin; (B) 5-40 parts of polyphenylether resin; (C) 5-30 parts of phosphoric bisphenol polymer; (D) 30-60 parts of halogen-free epoxy resin. The prepreg and the printed circuit laminate made from the halogen-free thermosetting resin composition, provided by the invention, have high glass transition temperature, excellent dielectric properties, low water absorption rate, high heat resistance, high peel strength, excellent humidity resistance and good process processability, can achieve no halogen and flame retardance and reaches UL94 V-0.

The invention discloses solvent-free polyurea weather-resistant anticorrosion coating. The solvent-free polyurea weather-resistant anticorrosion coating comprises components A and component B. The components A are hexamethylene diisocyanate curing agents with the solid contents of 100% by weight; the components B comprise, by weight, 40-50 parts of parahelium polymers, 0.3-0.5 part of dispersing agents, 0.3-0.5 part of defoaming agents, 0.8-1 part of thixotropic agents, 3-5 parts of coupling agents, 7-10 parts of titanium dioxide, 7-10 parts of sericite and 23-42 parts of glass powder; a weight ratio of the components A to the components B is 27:100-34:100. The solvent-free polyurea weather-resistant anticorrosion coating has the advantages that the solvent-free polyurea weather-resistantanticorrosion coating can be used for the outer walls of above-ground steel storage tanks and the outer surfaces of non-heat-insulation steel overhead pipelines; the solvent-free polyurea weather-resistant anticorrosion coating is good in low-temperature flexibility and is ultrahigh in bond force with the surfaces of coated objects; the solvent-free polyurea weather-resistant anticorrosion coatingis sufficient in abrasion-resistant hardness and ultrahigh in ultraviolet aging resistance and salt spray resistance; the solid content of the solvent-free polyurea weather-resistant anticorrosion coating can reach 98% at least, and the solvent-free polyurea weather-resistant anticorrosion coating is wide in curing reactive environmental temperature interval; curing reaction can be quickly carried out without curing agents or accelerators; the solvent-free polyurea weather-resistant anticorrosion coating is free of sagging when thickly coated.

The invention discloses silk-screen UV glaze printing ink and a preparation method thereof, and belongs to the technical field of printing ink and preparation thereof. The printing ink is prepared from 28-32% of epoxy modified acrylate, 18-22% of urethane acrylate, 8-12% of tri(propylene glycol)diacrylate, 18-22% of 1,6-hexamethylene diacrylate, 6-10% of a 184 macroinitiator, 3-7% of an active-amine auxiliary photoinitiator, 0.8-3% of an organosilicone flatting agent, 0.8-3% of an organosilicone antifoaming agent and 3-7% of fumed silica, and is prepared by processes of mixing, stirring at a high speed, grinding, and the like. The preparation method is simple. The printing ink prepared by the method has a transparency effect and a matte effect, thus satisfying a conceive of applying the technical quality of blue and white porcelain and other famous porcelain in history to packaging and printing, and simulating the glaze quality, of the porcelain, that is mild and humid like jade. The printing ink provided by the invention has high environmental protection property. The VOCs smell residue totally reaches requirements of the national standards.

The invention provides a dual-curing unsaturated polyester white primer and a preparation method thereof. The dual-curing unsaturated polyester white primer is composed of a main paint, a diluter, an initiator, an accelerator and a curing agent. The main paint is composed of an unsaturated polyester resin, a defoaming agent, a dispersing agent, an anti-settling agent, a leveling agent, a polymerization inhibitor, a sanding agent, titanium white, a filler and an active solvent. The curing agent is composed of a TDI (toluene diisocyanate) addition product and polyurethane-grade butyl acetate. The diluter is composed of butyl acetate, styrene and toluene. The unsaturated polyester resin is an air-drying unsaturated polyester resin, thereby avoiding the phenomenon of undried and sticking paint film surface since oxygen can easily have the polymerization inhibition effect in the construction process. The polyurethane contained in the raw materials can increase the curing crosslinking points of the unsaturated polyester, enhance the crosslinking reaction density, increase the curing reaction speed, enhance the sanding property and shorten the application production cycle, has the advantages of excellent adhesive force and favorable anti-cracking effect in case of thick coating, and completely satisfies the furniture application requirements.

The invention relates to printing ink, in particular to silk-screening printing ink with high flexibility and high brightness. The silk-screening printing ink with high flexibility and high brightness is characterized by comprising the following components in percentage by weight: 44 to 48 percent of bifunctional polyurethane resin, 16 to 20 percent of tetra-functional polyester resin, 9 to 13 percent of amine modified acrylic resin, 11 to 15 percent of acrylic ester monomer, 1 to 4 percent of fluorocarbon surface modifier, 1 to 5 percent of macroinitiator BP, 1 to 3 percent of organic silicon defoaming agent, 1 to 4 percent of organic silicon polyether modified flatting agent and 1 to 4 percent of bentonite. The printing ink has extremely high flexibility; and a product is difficult to crack after the printing ink is printed on the product. The printing ink has excellent weather resistance, is difficult to yellow and has high brightness after the printing ink is dried to form a film.The printing ink - does not produce byproducts after curing reaction and has low mobility and volatility, so that the printing ink has high environment friendliness, and the odor residue of volatile organic compounds (Vocs) completely meets the national standard requirement.

The invention discloses a corrosion-resistant and wear-resistant coating for a mortar pump, and belongs to the field of chemical industry. Specifically, the corrosion-resistant and wear-resistant coating is prepared from the following substances: modified epoxy resin, a modified filler, a modified curing agent, polyoxyethylene polyoxypropylene ether, polyoxypropylene glycerol ether, triethyl-hexyl phosphoric acid, fatty acid polyethylene glycol ester, N-acetylimidazole, tri-(dimethylaminomethyl)phenol, ethylenediamine tetraacetic acid disodium, isopentyldiol, and propylene glycol monomethyl ether. The prepared coating has a high adhesive force to a metal pump body, is uniform in film forming, compact in structure, small in structure pore, and good in corrosion resistance, has good hardness, impact resistance and comprehensive performance, and can effectively improve service quality and prolong the service life of the mortar pump.

The invention relates to the technical field of vacuum electroplating, in particular to a vacuum electroplating UV photocuring prime coat and a preparation method thereof. The vacuum electroplating UVphoto-curing prime coat is prepared from the following components by weight percentage: 10-20 parts of epoxy acrylic resin, 10-15 parts of polyester acrylate and 10-15 parts of polyurethane acrylic resin; 0.3 to 0.5 part of an adhesion promoter; 15 to 25 parts of an active monomer diluent; 3-5 parts of a photoinitiator; and 30 to 40 parts of a cosolvent; and the adhesion promoter is vinyl trimethoxy silane. In the present application, an adhesion promoter is added into the vacuum electroplating UV photocuring prime coat; vinyl trimethoxy silane is subjected to a double bond addition reactionin the presence of a photoinitiator, and is copolymerized or grafted into a prepolymer, alkoxy and silica bonds are introduced, and the alkoxy increases the crosslinking point of the prepolymer duringcrosslinking and curing, so that the crosslinking density is improved, and the effect of improving the adhesive force of a cured coating is achieved.

The invention discloses a preparation method of vinyl-terminated liquid fluoroelastomer supportive of room-temperature quick curing. The preparation method includes: dissolving carboxyl-terminated liquid fluoroelastomer into an organic solvent; adding an epoxy group-vinyl compound into a system; in the presence of an alkaline catalyst, stirring for reaction for 4-20 h in nitrogen atmosphere, wherein reaction temperature is controlled to 50-120 DEG C, and reaction pressure is pressure generated by the system itself. Terminated vinyl of the vinyl-terminated liquid fluoroelastomer has quite high reaction activity, curing reaction speed is high, quick curing can be realized at room temperature, and curing agent options are diverse. Curing points are positioned at two ends of a liquid polymer, so that tensile strength and elongation rate of a curing product can realize optimal balance. The curing product has high resistance to chemical media and can be used in harsh environment. The preparation method is simple and easy to implement, free of danger, low in cost and high in yield.

The invention discloses a carbon fiber cloth adhesive for underwater or humid environment reinforcement engineering and a preparation method thereof. The adhesive is obtained by well mixing a component A and a component B. The component A is prepared from fluorinated epoxy resin, hydroxymethyl bisphenol A type epoxy resin, bisphenol S type epoxy resin, diglycidyl aniline, trimethylolpropane triglycidyl ether, a toughening agent, water-absorbent resin, a defoaming agent, a dispersing agent, active silica powder, carbon nanotubes, cement and fumed silica. The component B is prepared from aliphatic amide polyamine, isophorone diamine, a curing agent, DMP-30, a coupling agent, a defoaming agent, a dispersing agent, active silica powder, carbon nanotubes, cement and fumed silica. The adhesive prepared by the invention has the advantages of high water interface bonding strength, high colloid mechanical strength, good toughness, strong impact resistance and fatigue resistance, good construction performance and the like, and the bonding effect and durability of the carbon fiber cloth adhesive in water environment reinforcement engineering can be remarkably improved.

The invention relates to a method for producing environment-friendly density boards, and a special medium-low temperature solidifying agent, and belongs to the technical field of the production of medium density fiberboards. The technical scheme of the method lies in that the method comprises the following steps: mixing ammonium bisulfate and ammonium polyphosphate, wherein the mass proportion of the ammonium bisulfate to the ammonium polyphosphate is 0.6-1.5, a liquid water solution with different pH values is formed according to different proportions, the mass concentration of the ammonium bisulfate in the liquid water solution is 5-20%, and the mass concentration of the ammonium polyphosphate in the liquid water solution is 3-25%; determining the pH value of the liquid water solution according to the pH value of wood fibers of fiberboards of density boards in production, wherein the pH value of the wood fibers is 7.5-8, and the pH value of the corresponding liquid water solution is 5.2-6.0. According to the method disclosed by the invention, the production capacity is not lowered under the condition of lower than 30 DEG C by the same proportion, and besides, the application effects of physical and mechanical properties and using properties of products can be guaranteed; under the production condition of medium-low temperature and in the use of the special medium-low temperature solidifying agent, the degree of acidity cannot cause larger influence on devices, the low-temperature high-speed operation of the production line can be realized, and the service lives of the devices are prolonged.

The invention relates to a photochromic spectacle lens with a coating prepared from epoxy resin. The photochromic coating is formed by curing a composition consisting of hydrogenated epoxy resin, flexible epoxy resin, a cationic thermal curing agent, photochromic dye, an auxiliary agent and a solvent. The cationic thermal curing agent is applied, so that the coating curing temperature is reduced,the reaction temperature can be reduced to 80 DEG C or below, and the lens is not yellowed; the curing time of the coating is shortened, the reaction is rapid, and the epoxy resin can be completely cured within 0.5 hour; the curing agent does not react with the photochromic dye, so that abnormal color of the spectacle lens is avoided. The coating liquid prepared from the epoxy resin has good storage stability. The molecular structure of the hydrogenated epoxy resin adopted by the invention does not contain benzene rings, so that the fracture defect of double bonds is overcome, the outdoor weather resistance is greatly improved, and the yellowing resistance is very good; and the flexible epoxy resin is added to adjust the hardness of the coating, thereby adapting to the flexibility and hardness requirements of the spectacle lens coating and ensuring the high color change speed of the spectacle lens.

The invention provides plaster for an acid-resistant anti-corrosion carbon brick. The plaster comprises the following raw materials in percentage by mass: 10%-25% of furfuryl alcohol resin, 5%-15% of phenolic resin, 0.5%-3% of hexamethylenetetramine, the balance of one of calcined petroleum coke, electro-forged clean coal or asphalt calcined coke, and 3%-15% of external curing agent phosphoric acid. The plaster for the acid-resistant anti-corrosion carbon brick disclosed by the invention is rapid in solidifying reaction, low in heat release, stable in chemical performance in an acid environment, and not easy to permeate.