117results about How to "Promote curing reaction" patented technology

The invention discloses a method for preparing a methyl phenyl vinyl silicone resin, which comprises the following steps of: under a condition of a nitrogen atmosphere at the temperature of between 30 and 45 DEG C, dissolving a certain amount of methyl trimethoxy silane, vinyl trimethoxy silane and alkyl dimethoxy silane in ethanol; adjusting the pH of the system to between 2.8 and 3.5; after full reaction, adding the methyl trimethoxy silane, the vinyl trimethoxy silane, the alkyl dimethoxy silane and deionized water into the mixture to perform isothermal reaction for 0.5 to 1 hour at the temperature of between 50 and 60 DEG C; raising the temperature to between 72 and 78 DEG C, performing the isothermal reaction again for 8 to 10 hours, and then dropping an end capping agent and deionized water into the mixture; performing reaction at the temperature of between 72 and 78 DEG C for 6 to 10 hours to obtain a white emulsion; and standing the mixture until complete demixing, separating the mixture to obtain an oily matter at a lower layer, and performing vacuum drying on the oily matter to obtain a product of the methyl phenyl vinyl silicone resin. In the method, the process is simple, the product is easy to separate and purify, the reactions are mild and are easy to control, and the processability is greatly improved.

The invention relates to a modified cyanate adhesive film and a preparation method thereof, belonging to the field of modified cyanate adhesive films and preparation methods thereof. The invention aims at solving the technical problems that the surface of the cyanate adhesive film prepared by using the existing cyanate adhesive film preparation method is apt to be crystallized during placing at room temperature, the mechanical performance is low and the curing temperature is high. The modified cyanate adhesive film is prepared by using the following components in parts by weight: 60-100 parts of cyanate resin, 5-40 parts of epoxy resin, 1-50 parts of toughened resin, 1-10 parts of activated thinner and 1-5 parts of accelerator. The preparation method comprises the following steps of: 1) weighing raw materials; 2) preparing matrix resin; 3) preparing adhesive; and 4) preparing the modified cyanate adhesive film. The modified cyanate adhesive film and the preparation method thereof are used in the fields of aerospace and electronic information.

The invention discloses a high-temperature resistance carbon fiber/epoxy resin composite material, a preparation method and use. The method comprises the steps of preimpregnation material preparation and composite material curing forming. Through introducing a kind of latent accelerating agents of fatty amine hydrofluoride, the method reduces the forming time of the composite materials in a mold, effectively improves the production efficiency, reduces the production cost, and can not shorten the storage period of the preimpregnation materials. Through the high-temperature heat treatment, the invention further improves the crosslink density of the resin, and is favorable for improving the vitrification conversion temperature of the composite materials, and at the same time, the high-temperature heat treatment can effectively eliminate the inner stress produced by fast curing. The prepared composite material has good mechanical property and abrasion resistance performance, the vitrification conversion temperature of the composite material is between 190 and 210 DEG C, and the 180 DEG C high-temperature environment resistance requirements can be met.

The invention provides a water-based self-drying casting paint, and a preparation method and an application method. According to the invention, 1-3% of sodium-based bentonite and water 1-1.5 times the weight of bentonite are uniformly stirred with high speed; the mixture is added in a sealed container and is subjected to standing, where the mixture is sufficiently wetted and activated, such that a liquid A is prepared; 0.1-0.4% of sodium carboxymethyl cellulose is dispersed by using ethanol with a concentration no lower than 95% according to a weight ratio of 1:1; water with an amount 30-50 times that of the mixture is added; the mixture is uniformly stirred and is subjected to standing and sufficient initiation; the mixture is mixed with the liquid A; the obtained mixture is stirred with a proper amount of water; a composite suspension is prepared by grinding by using a colloid mill; the suspension is mixed and grinded with 60-71% of mullite, 0.05-0.1% of a wetting agent, and 4-6% of a modified phosphate binder, such that a pasty paint is prepared; and the pasty paint is diluted by using water, such that the paint is obtained. After a reaction with an alcohol-based paint comprising magnesia powder, the paint can be self-dried. Therefore, cost of independent use of an alcohol-based paint or a water-based paint is greatly reduced, and the influence to the environment is greatly ameliorated.

The invention discloses a carbon fiber-based precoated sand material for selective laser sintering and a preparation method thereof. The carbon fiber-based precoated sand material comprises chopped carbon fibers, crude sand, an organic binder, a curing agent, a lubricant, a coupling agent and a dispersant. The preparation method comprises the following steps of carrying out surface modification treatment on the chopped carbon fibers, heating the crude sand, adding resin, adding a part of calcium stearate and a prepared coupling agent aqueous solution, adding a chopped fiber-containing urotropine curing agent, adding the rest of the calcium stearate, carrying out cooling and carrying out screening and sand discharge to obtain the product. The carbon fiber-based precoated sand material has the advantages that 1, the carbon fibers have thermal conduction effects, limit integral shrinkage of a sintered part to a certain degree and reduce warp phenomenon in molding, and 2, through laser sintering, the precoated sand substantially improves resin precoated sand thermostability, promotes curing reaction of phenolic resin at locals in the sintered layer and between the sintered layers and obviously improves laser sintering forming part blank strength.

The invention belongs to the technical field of concrete, and particularly relates to an electromagnetically-induced self-repairing epoxy resin type microcapsule for cement concrete cracks and a preparation method thereof. The microcapsule consists of an epoxy resin microcapsule body and a curing agent microcapsule body. According to the microcapsule and the preparation method thereof, a paraffin/petroleum resin/polyethylene wax/iron powder mixture serves as a capsule wall, and epoxy resin and a low-molecular polyamide curing agent serve as a capsule core of the microcapsule; and when concretegenerates the cracks, the propagation tip stress of part of the cracks is large, so that the capsule wall of the microcapsule can be broken, the epoxy resin or the low-molecular polyamide curing agent inside the capsule flows out and is diffused to enter the cracks, curing reaction is generated to form a cross-linked product, so that the cracks can be repaired in time, cracks which are not repaired in time can enable the capsule wall of the microcapsule to be heated and melted under the action of an applied electromagnetic field, and the epoxy resin or the low-molecular polyamide curing agentis diffused to enter the cracks, so that the cracks can be repaired. The epoxy resin microcapsule has the advantages of being capable of endowing the concrete with stronger crack self-repairing capability and capable of prolong the service life of the concrete.

The invention relates to the technical field of sealants, in particular to a solvent-resistant epoxy modified polyurethane sealant and a preparation method thereof. The sealant is prepared from, by weight, 20-40% of an epoxy modified polyurethane prepolymer A, 10-30% of a low-viscosity polyurethane prepolymer B, 29.4-59.4% of an inorganic filler, 0.01-30% of a thixotropic agent, 0.01-2% of a curing promoter, 0.01-2% of a water removal stabilizer and 0.01-2% of an adhesion promoter. The epoxy modified polyurethane sealant has excellent chemical corrosion resistance and mechanical properties, through a chemical corrosion test in the industry standard of a membrane-type gas meter, after liquid immersion, the mechanical properties, mass change rate and volume change rate of the sealant can allbe kept at a very small change rate, the adhesive sealing effect is good, and the sealant can keep the good adhesive sealing function during long-term use in the gas meter.

The invention discloses a quick-setting epoxy grouting mortar suitable for summer first-aid repair construction. The quick-setting epoxy grouting mortar is formed by mixing of a resin component A, a curing agent component B and a bone powder component C in a mass ratio of 1:(0.2-0.26):(5-7) during use. Specifically, the component A comprises the following components by weight: 100 parts of modified epoxy resin, 1-15 parts of an alcohol ether composite diluent, 1-3 parts of a coupling agent, and 0.5-3 parts of a rheological agent; the component B comprises the following components by weight: 16-23 parts of a modified polyamine curing agent, and 1-3 parts of an accelerator; and the component C comprises the following components by weight: 1-23 parts of dolomite powder, 15-46 parts of bariumsulfate powder, 10-121 parts of cement, 385-588 parts of sea sand, and 0.1-1.5 parts of a defoamer. The quick-setting epoxy grouting mortar provided by the invention has the technical characteristicsof short curing time, high hour strength, and no flash polymerization during high temperature construction, at the same time is non-toxic and harmless, and is simple to prepare, and is widely applicable to concrete structure repair with quick-setting and early strength requirements and construction of installation and anchoring projects, especially suitable for summer repair construction.

The invention relates to a solvent-free epoxy anti-permeability barrier coating.The solvent-free epoxy anti-permeability barrier coating comprises components A and components B.The components A comprise, by weight, 80-100 parts of epoxy resin, 5-15 parts of flexibility improving resin, 5-15 parts of diluents, 0-1 part of defoaming agents and 0.1-0.5 part of leveling agents; the components B comprise, by weight, 80-100 parts of modified amine curing agents and 0-5 parts of silane coupling agents.The solvent-free epoxy anti-permeability barrier coating is mainly used for waterproof treatment on cement base planes and has the advantages of low viscosity, high elongation, adhesion and toughness and the like.

The invention provides a silicon alky quenching EVA heat fusion glue compound which grafts the active silane group on the EVA resin macro-chain by squeezing or fusion reaction and uses the silane group to do cross bonding reaction to improve the heat preservation and adhesion property of the heat fusion glue series.

The invention relates to the field of high polymer materials, in particular to an epoxy sealing agent for a timber product. The epoxy sealing agent for the timber product comprises a first component and a second component; the first component comprises, by mass percentage, 49-56% of non-ionic water-borne epoxy emulsion, 16-19% of epoxy-acrylic emulsion, 3.2-8.7% of first auxiliary and 16.3-31.8% of water, wherein the mass ratio of the non-ionic water-borne epoxy emulsion to the epoxy-acrylic emulsion is 3:0.8-1.2, and the sum of the mass percentages of the compositions of the first component is 100%; the second component comprises, by mass percentage, 14.8-24.6% of water, 75-85% of water-borne epoxy hardener and 0.2-0.4 % of second auxiliary, wherein the sum of the mass percentages of thecompositions of the second component is 100%. The sealing agent not only has a good sealing effect, but also has a better rib swelling resistance effect; meanwhile, compact paint film is formed, so that the hardness of timber is enhanced in disguised form, and construction attachment of subsequent water paint is not affected; no organic solvent exists, and VOC emission is low, so that the sealingagent is more environmentally friendly. The invention further discloses a preparation method and application of the sealing agent.

The invention relates to low-temperature quick-drying dual-component automotive trim paint, which is used for solving the problems of long baking time, high baking temperature and low hardness in the conventional automobile plastic trim paint. The low-temperature quick-drying dual-component automotive trim paint consists of a component A and a component B, wherein a mass ratio of the component A to the component B is 4:1; the component A consists of the following substances in part by mass: 60 to 80 parts of hydroxy acrylic resin mixture, 5 to 25 parts of solvent A, 5 to 10 parts of filler, 0.1 to 0.5 part of defoamer, 0.1 to 0.15 part of flatting agent, 0.4 to 0.8 part of drier, 0.5 to 1.5 parts of light stabilizer and 0.5 to 1 part of light absorber; and the component B consists of the following substances in part by mass: 50 to 60 parts of curing agent, 4 to 8 parts of curing accelerator and 35 to 55 parts of solvent B. According to an automotive interior trim part sprayed by the automotive trim paint, the baking time can be reduced by nearly 50 percent, the baking temperature is reduced by about 20 DEG C, and the hardness of pencils is improved to 2H; and the low-temperature quick-drying dual-component automotive trim paint has the characteristics of improving production efficiency and quality of products along with energy conservation.

The invention relates to a stable curing repair system for polluted soil. The system consists of a dispensing tank, a chemical storage box, a centrifugal pump, a spraying device, a reaction tank, a recovery tank, a circulating pump, a backhoe excavator and a movable gantry mixer; the system can be used for rapidly repairing the polluted soil by adopting repair chemicals with different forms, types and concentrations at different temperatures according to the characteristics of the different polluted soil; the system is mainly suitable for the soil polluted by heavy metals such as Cr, Cd, Pb, Zn and Cu. The stable curing repair system is reasonable in arrangement, wide in application scope, rapid in reaction speed, short in repair period, good in flexibility, safe and stable in operation and economically feasible, and can be used for heterotopic or in-situ repair of the polluted soil; the repaired soil can meet the relevant standard, and comprehensive resource utilization of the polluted soil can be realized, so that the system has good environmental protection benefit and social benefit.

The present invention combines microwave heating technology and traditional press. The microwave hot forming apparatus includes pressing unit, microwave heater, upper and lower molds and demolding unit. The microwave heater is set inside the upper mold and/or in the bottom of the lower mold, microwave acts on the material via the energy locking port and microwave transparent window in the bottom board to heat the material via its dielectric loss. While heating, the material is microwave heated to cure and form. The present invention has the simultaneous heating of inside and outside of the material, and the heating is homogeneous, fast and high in efficiency. The present invention combines formation, curing and stoving.

The invention belongs to the field of composite material, and specifically discloses a latent curing system used for moulding prepregs at a medium or low temperature and a method for preparing the latent curing system. The latent curing system comprises 10-50 parts of epoxy resin, 50-100 parts of a latent curing agent, 40-80 parts of a liquid room-temperature reactive curing agent, and 1-10 parts of an accelerant. The preparation method comprises the following steps: uniformly mixing the latent curing agent and the liquid room-temperature reactive curing agent; adding epoxy resin and the accelerant to carry out a reaction at the temperature of 60 to 100 DEG C for 2-6 hours; and finally obtaining a paste liquid that is the latent curing system used for moulding prepregs at a medium or low temperature. According to the invention, the latent curing system is used for moulding at a medium or low temperature, the curing temperature of the latent curing agent is reduced, and the pasty form is beneficial to uniformly dispersing the latent curing system in the epoxy. The latent curing system is simple in operation of preparation technology and is suitable for large-scale industrial production.

The invention provides an anti-aging glass fiber reinforced plastic material. The anti-aging glass fiber reinforced plastic material is prepared from the following raw materials in parts by weight: 100 parts of unsaturated polyester resin, 2-8 parts of styrene, 1-3 parts of a curing agent, 1-3 parts of an accelerant, 80-120 parts of glass fibers, 10-40 parts of an illite functional powder material, 1-3 parts of a coupling agent I, 1-2 parts of zinc oxide and 5-6 parts of graphene. The preparation method comprises the following steps: pickling illite powder, washing with water to be neutral, drying, and modifying with a coupling agent II to obtain the illite functional powder material. The illite functional powder material is added and compounded with other raw materials, so that the crosslinking degree between macromolecular chains can be increased; the anti-aging glass fiber reinforced plastic material is particularly suitable for marine environments such as ships, and the salt fog resistance, the aging resistance and the strength of the anti-aging glass fiber reinforced plastic material are remarkably improved compared with those of a common glass fiber reinforced plastic material.

The invention discloses a high-frequency copper-clad plate composition applied to an antenna base material. The high-frequency copper-clad plate composition contains the following raw materials in parts by weight: 25-50 parts of an organic polymer, 30-65 parts of an inorganic filler, 5-10 parts of a crosslinking agent, 3-10 parts of a curing agent and 2-5 parts of a coupling agent. A copper-clad plate base material prepared from the high-frequency copper-clad plate composition has the advantages of low dielectric constant and dielectric loss, good heat resistance, low thermal expansion coefficient, low water absorption rate and the like and can meet the requirements of a communication antenna to printed circuit board base materials.

The invention relates to the technical field of flame retardant modification, and provides a high-heat-conduction halogen-free expansion flame-retardant epoxy resin pouring sealant and a preparation method thereof. The preparation method comprises the following steps: preparing a first epoxy component, namely mixing epoxy resin, a toughening agent, an epoxy active diluent, a dispersing anti-settling agent and a defoaming agent for forming a first mixture, mixing zinc oxide and boron nitride to obtain a high-heat-conduction filler component, adding the high-heat-conduction filler component intothe first mixture for forming a second mixture, preparing a halogen-free expansion flame-retardant filler component by using crystalline II type diammonium polyphosphate and dipentaerythritol, addingthe halogen-free expansion flame-retardant filler component into the second mixture, and carrying out mixing and defoaming to obtain a first epoxy component; preparing a second epoxy component, namely mixing methyl tetrahydrophthalic anhydride, methyl hexahydrophthalic anhydride, a curing accelerator and a defoaming agent, and then carrying out defoaming to obtain a second epoxy component; and mixing the first epoxy component and the second epoxy component, carrying out defoaming, and then carrying out curing twice. The preparation method has simple operation and low production cost, and theprepared epoxy resin pouring sealant has excellent thermal conductivity and flame retardance.

The present invention discloses a pipeline hot melt adhesive and a preparation method thereof. The pipeline hot melt adhesive comprises the following components by weight: 20%-46% of a tackifying resin, 10%-25% of a maleic anhydride graft copolymer, 0.5%-2% of an antioxidant and 28%-65% of base resin, wherein the base resin comprises 10%-40% of a styrene-butadiene-styrene block copolymer and 60%-90% of an ethylene-vinyl acetate copolymer. The hot melt adhesive is prepared in two steps: 1, mixing styrene-butadiene-styrene block copolymer with ethylene-vinyl acetate copolymer, and pelletizing by a twin-screw extruder; and 2, mixing the raw materials in a kneader by using a mixing method. The invention has the advantages of simple formula, method and technology and low cost. The obtained hot melt adhesive has stable performance and good bonding performance, can be applied to metal pipeline anticorrosion repair, and has good economic benefit and industrial production prospects.

The invention relates to the field of coatings and solves the problems of the existing oil-based orange-grain paints, such as heavy pollution, heavy odor, slow drying and poor hardness of water-based orange-grain paints, and is specifically a new type of water-based two-component epoxy orange-grain paint. The water-based two-component epoxy orange paint includes main agent A and component B, and the weight ratio of the main agent A and component B is 5:1; wherein the main agent A includes the following substances in weight ratio: epoxy 40-60 parts of emulsion; 10-30 parts of water; 0.5-1.5 parts of dispersant; 0.1-0.5 parts of defoamer; 5-20 parts of titanium dioxide; 10-20 parts of filler; 0.5-2 parts of auxiliary agent; wherein component B includes the following substances by weight ratio: 5-15 parts of water-based amine curing agent; 5-10 parts of water; 0.2-0.5 part of defoamer; The better the compatibility of oxygen orange grain paint, the better the curing reaction is, and it can fully penetrate into the inner core to achieve a more complete curing degree, fast drying, strong three-dimensional effect, clear orange grain, high mechanical strength, and Environmental friendly.