36results about How to "Fast curing at low temperature" patented technology

The invention relates to a preparation method of repairing adhesive, in particular to a binder for repairing blade of a wind driven generator, belonging to the high polymer material field. The preparation method of double-component epoxy resin binder used for repairing blade is simple in operation and low in cost. The double-component epoxy resin binder for repairing blade which is made by the method of the invention has high tenacity, high shear strength, low heat and low shrink, thus being suitable for repairing and binding of large structural part; solidification is rapid, the binder can be rapidly solidified in 10-30 minutes at 5-25 DEG C and reach certain strength; and the binder is used for repairing defect of blade of wind driven generator.

The present invention relates to the technical field of adhesives, and relates to a one-component epoxy adhesive used for bonding LED backlight modules LENS, and a preparation method thereof. The one-component epoxy adhesive comprises the following components by weight: 30-40 parts of epoxy resin; 10-15 parts of an epoxy flexibilizer; 34-40 parts of polymercaptan; 20-30 parts of a filler; 5-7 parts of a promoter; 1-2 parts of a stabilizer; 0.5-1 part of a coupling agent and 1-2 parts of a water absorbent. Compared with the previous invention, the one-component epoxy adhesive has excellent heat and humidity aging resistance while maintaining low temperature curing performance.

The invention discloses a cashew phenolic aldehyde amide epoxy hardener for four-season-general type anticorrosive paint and a preparation method of the cashew phenolic aldehyde amide epoxy hardener. The cashew phenolic aldehyde amide epoxy hardener is composed of, by weight, one part of diethylenetriamine, 2.5-3 parts of dimer acids or fat single acids, 2.8-3.2 parts of anacardol, one part of the diethylenetriamine, and 0.9-1.2 parts of 96%-purity paraformaldehyde. Raw material composition, and the best matching and the feeding order of each material are optimized through a large number of experiments, and each component matching is scientific and reasonable. The method of mannich addition after amidation is utilized, the whole process is strong in operability, cost is low, production periods are short, productivity is high, the prepared cashew phenolic aldehyde amide epoxy hardener can be general in four seasons, drying is rapid, operation periods are short, anti-corrosion performance is good, and water-proof performance is excellent. The cashew phenolic aldehyde amide epoxy hardener can be widely used in the fields of pipe and storage tank storage corrosion prevention, adhesion agents, metallic top coats, chip heavy corrosion prevention and the like.

The invention relates to waterborne epoxy flash-rust preventing paint which is prepared from 30% to 33% of waterborne epoxy emulsion, 10% to 11% of waterborne epoxy curing agent, 40% to 46% of anti-corrosive filler, 1% to 2% of flash-rust preventing agent, 1% to 2% of dispersing agent, 1% to 2% of wetting agent, 1% to 2% of defoaming agent and the balance of water in percentage by mass. According to the waterborne epoxy flash-rust preventing paint disclosed by the invention, the waterborne epoxy emulsion and the waterborne epoxy curing agent which are modified by pure plant cardanol are utilized, so that a prepared paint film is high in film hardness, good in adhesive force, excellent in anti-corrosive performance and mechanical performance, safe and environment-friendly and has no pollution. According to the waterborne epoxy flash-rust preventing paint disclosed by the invention, the paint film is better in flash-rust prevention ability and wider in construction environment, and can resist to low-temperature curing.

The invention discloses a modified tertiary aliphatic amine type epoxy resin latency curing agent which is prepared by enabling urea or isocyanate to react with polyamine and tertiary aliphatic aminewith amino or hydroxyl in a solvent, removing the solvent and crushing the obtained solid. The prepared latency curing agent is simple and easy in material obtaining, simple and convenient in processand can be cured at a low temperature, and a cured product is light in color and has good adhesion strength.

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 preparing resin, in particular to a method for preparing water-soluble resin. The method for preparing the water-soluble resin is characterized by comprising the following steps of: adding 30 to 50 kilograms of raw materials into a reaction kettle at the temperature of between 190 and 210 DEG C under the pressure of between 1.3 and 1.7MPa, then adding 1 to 3 kilograms of sodium hydroxide and 50 to 70 kilograms of water into the reaction kettle to perform alkaline hydrolysis reaction for 2 to 4 hours, adding 0.2 to 2 liters of low molecular aldehyde substance and 0.3 to 1 liter of silane into the reaction kettle and further reacting for 4 to 5 hours, and obtaining the water-soluble resin after the reaction is finished. The method has the advantages that: the water-soluble resin prepared by the method thoroughly solves the pollution problem of adhesive for casting by using the water as a medium, and has the advantages of low-temperature quick curing, energy conservation, no pollution, no odor, high strength, good collapsibility, wet creep resistance, dry moisture absorption resistance and the like.

The invention relates to a fireproof coating for a rail transit locomotive/vehicle and a preparation method of the fireproof coating. The fireproof coating for the rail transit locomotive/vehicle is prepared by taking poly-alpha-methyl styrene modified epoxy resin, a fire retardant and the like as the components of the coating, taking modified amine and a curing agent accelerator as components ofa curing agent, and using a proper amount of a diluent in the construction. The main purpose is to obtain a fireproof coating product for the rail transit locomotive/vehicle, the thickness of a film of the fireproof coating product for the rail transit locomotive/vehicle is thin (less than or equal to 2.0 mm), the expansion coefficient is large, the structural strength of a carbon layer is high, the heat conductivity coefficient is low, the fire resistance is strong, the adhesive property is good, the spraying is convenient in the construction, and the comprehensive performances are excellent.

The invention relates to the field of polyurethane materials, in particular to a preparation method of a polyurethane pouring sealant, which comprises the following steps: preparing a component A; preparing the component B; and preparing the polyurethane pouring sealant: mixing the component A in the step S1 and the component B in the step S2 to obtain the polyurethane pouring sealant. The polyurethane pouring sealant provided by the invention has the characteristics of small viscosity, normal-temperature curing, and controllable curing speed and time, has excellent film performance, and also has good flexibility, water resistance, flame retardance and electrical performance, and can be applied to potting of electric appliance elements. The invention also provides a preparation method of the polyurethane pouring sealant. The preparation method is simple and rapid.

The invention relates to a low-temperature curing coating material composition for a carbon fiber substrate, wherein the low-temperature curing coating material composition comprises type 2-4 BPA or phenol formaldehyde modified epoxy resin, a phenolic curing agent, and a catalyst. According to the present invention, the application problem of the carbon fiber primary coat is solved; and the low-temperature fast curing is achieved (120 DEG C@15 min), the thickness of the one-time formed film is more than 100 [mu]m, the leveling is good, the PCI grade is more than 8, the hardness is high, and the pencil hardness is more than 1 H while the good corrosion resistance is provided.