31results about How to "Moderate curing time" patented technology

The invention provides an adhesive for grade-E0 medium density fiberboards. The raw materials of the adhesive include formaldehyde, polyvinyl alcohol, urea and tripolycyanamide. The production process of the adhesive comprises: firstly, adding all formaldehyde into a reaction kettle, regulating the pH value of formaldehyde solution to 7.5 to 8.5 by using sodium hydroxide solution, adding the 40 to 50 percent of polyvinyl alcohol and urea and adding 80 to 90 percent of tripolycyanamide and adding the 10 to 20 percent of urea; secondly, adjusting the pH value to 5 to 6 by using formic acid, reacting for 20 to 30 minutes till a cloud point, regulating the pH value to 705 to 8.5 with caustic soda solution, and adding the 10 to 20 percent of tripolycyanamide and 20 to 30 percent of urea; and finally, adding 10 to 20 percent of urea, regulating the pH value of the adhesive to 6.6 to 7.5, and discharging. The adhesive has the advantages that: the free formaldehyde content is very low, and the manufactured medium density board is of grade E0; the curing time is proper, the storage stability is high, and the normal-temperature storage period is about 1 month; and the manufactured medium density board has high internal combining strength and high waterproof and dampproof performance.

The invention relates to a photocurable 3D printing material as well as a preparation method and application thereof. The photocurable 3D printing material is prepared from the following raw materialcomponents in parts by weight: 20 to 80 parts of photocurable resin, 10 to 60 parts of photocurable active diluent, 1 to 10 parts of photo-initiator, 0.1 to 20 parts of thixotropic agent and 0.1 to 5parts of auxiliaries, wherein the thixotropic agent is at least one of attapulgite, montmorillonite, bentonite, fumed silica, polyamide wax and mica powder; the photocurable resin is at least one of aliphatic polyurethane and aliphatic epoxy resin. The photocurable 3D printing material has high thixotropy, and can be applied to the nozzle printing process of FDM (Fused Deposition Modeling). Compared with an SLA (Stereolithigraphy Apparatus), the photocurable 3D printing material has the advantages that the production cost of 3D printing products can be lowered effectively, high molding speed and high precision are achieved, complex-contour or large-sized 3D printing products can be made.

The invention relates to a new maintenance material of pavement crack, comprising the raw materials according to weight part as follows: 100 parts of 107 base glue, 1-10 parts of cross linker, 1-5 parts of tackifier, 5-50 parts of plasticiser, 1-100 parts of reinforcing filler, 0.1-0.5 parts of catalyst. The preparation method of the material is as follows: putting dimethyl silicone polymer base glue, reinforcing filler, plasticizer, tackifier and cross linker into a vacuum kneader to be uniformly mixed, obtaining component A; uniformly mixing catalyst and cross linker, obtaining component B; mixing components A and B according to the proportion of 1: 0.01-0.03, obtaining the material. The material has good weather resistance, aging resistance, ultraviolet resistance and self-levelling performance; the material does not need heat construction, has good repairing function for the pavement crack; the preparation method is simple; the invention can be widely applied to repairing and maintaining crack on asphalt, cement concrete pavement and correlative building.

The invention discloses a novel inorganic intumescent steel structure fireproof coating and a preparation method thereof, and belongs to the field of fireproof coatings, and the novel inorganic intumescent steel structure fireproof coating is characterized in that the fireproof coating mainly comprises the following raw materials in parts by dry weight: 5 to 6 parts of solid sodium silicate, 25 to44 parts of liquid sodium silicate, 20-40 parts of aluminum hydroxide, 3-10 parts of low-melting-point glass powder, 5-20 parts of magnesium oxide, 0-10 parts of redispersible latex powder, 0.1-5 parts of a waterproof agent, 0.1-1 part of a defoaming agent and 0-20 parts of water. Compared with the prior art, the method has the advantages of high expansion layer strength, small smoke amount, good film forming and fireproof performance, low cost, simple preparation process, convenient operation and the like.

The invention provides a preparation method of a continuous carbon fiber reinforced aluminum-based composite material. According to the preparation method provided by the invention, the thickness of an aluminum layer adhered to the surface of the carbon fiber can be controlled by adopting a method of adhering curing aluminum powder to the surface of continuous carbon fiber through organogel, so that the content and the spacing of the carbon fiber in a composite material after hot pressing sintering can be controlled, the carbon fiber can be parallelly distributed in an aluminum matrix, and analuminum-based composite material with high carbon fiber content can be prepared. The preparation method disclosed by the invention is low in cost and easy to operate and is capable of realizing industrialized production; the strength of the carbon fiber reinforced aluminum-based composite material obtained through the preparation method provided by the invention is obviously superior to that of the carbon fiber reinforced aluminum-based composite material prepared through an existing infiltration method, and a wide application prospect is obtained.

The invention discloses a low-cost, long-reserved time and high-performance modified asphalt and a preparation method thereof. The modified asphalt is an A and B dual-component system, wherein the component A is an epoxy resin and polyethyleneglycol diglycidylether mixture; and the component B comprises an emulsifier, matrix asphalt, a solidification agent and activated waste rubber powder. The preparation method comprises the following steps: adding the activated waste rubber powder into the matrix asphalt, adding the emulsifier and the solidification agent under a high temperature condition, carrying out shearing emulsification to obtain the component B, and fully mixing the component A and the component B of the modified asphalt to obtain the low-cost, long-reserved time and high-performance modified asphalt. Long reserved time is realized through selecting the specific epoxy resin solidification agent and regulating the solidifying rate of an epoxy system in order to meet road pavement and engineering maintenance with long reserved time requirements. The matrix asphalt and the waste rubber powder are used, so the production cost is reduced, and the low-temperature cracking resistance and stability of the modified asphalt are improved.

The invention provides a hot-melt-type marking coating. The coating is prepared from, by weight, 80-120 parts of thermoplastic resin, 20-40 parts of a bone material, 5-15 parts of pigments, 3-10 partsof a reflective material, 0.02-0.05 part of a whitening agent, 0.01-0.03 part of a defoaming agent, 2-6 parts of a novel mercaptan curing agent, 1-2 parts of an anti-settling agent, 1-4 parts of Twain and 0.03-0.06 part of a graphene-oxide-modified benzophenone UV anti-ultraviolet agent. The hot-melt-type marking coating prepared by means of the method has the advantages of being short in film forming and curing time and drying time, good in stain resistance, great in dustproof property, excellent in reflection effect, uniform in viscosity and good in anti-shedding performance after long-termstorage, safe, environmentally friendly, long in service life and the like, and has a broad application prospect.

The invention, which relates to the field of building materials, discloses a high-elasticity aging-resistant waterproof adhesive and a preparation method thereof. The waterproof adhesive is prepared by mixing a component A and a component B according to a weight ratio of 1: 1. The component A is prepared from 1200 to 2000 parts of bisphenol A type epoxy resin, 150 parts of reactive diluent, 120 to190 parts of non-reactive diluent, 45 to 80 parts of toughening agent and 120 to 140 parts of fumed silica; and the component B comprises 1200-2000 parts of modified phenolic aldehyde amine, 45-90 parts of a silane coupling agent, 2-6 parts of a defoaming agent, 24-30 parts of a flow stopping agent and 80-190 parts of fumed silica. The waterproof adhesive can reduce the thermal expansion coefficient and the shrinkage rate of a cured product, improve the surface hardness and the compression strength, reduce the heat release temperature in the curing process and play a thickening role, and canbe used in vertical wall surfaces, inclined roofs, ceilings and the like; and the mechanical strength, the elasticity modulus, the thermal aging performance and the weather resistance after curing areoptimized.

The invention discloses a marble glue adhesive for construction engineering and a preparation process thereof. The marble glue adhesive comprises a component A and a component B, wherein the weight ratio of the component A to the component B is 10:3; the component A consists of the following raw materials in parts by weight: unsaturated polyester resin, a reinforcing filler, a polymerization inhibitor, an accelerant, reinforcing chopped fiber, polyethylene glycol methacrylate, a diluent and a thixotropic agent; and the component B consists of the following raw materials in parts by weight: a filler curing agent, a plasticizer, an emulsifier and a thixotropic agent. The preparation method disclosed by the invention comprises the following steps: preparing the unsaturated resin, polyethyleneglycol methacrylate, the component A, the component B and the marble glue adhesive. The marble glue adhesive disclosed by the invention has excellent tensile shearing strength and impact strength, and has the advantages of convenient source of raw materials, simple production process, moderate curing time for obtained products, stable storage, small odor, high hardness, good toughness, excellentadhesive strength, good elasticity, excellent resistance to yellowing, moisture and heat, and the like.

The invention discloses an epoxy resin mortar comprising the following materials by weight: 90 parts of epoxy resin, 23-25 parts of curing agents, 26-28 parts of diluents, 170-190 parts of acid-resisting powder materials and 310-330 parts of aggregates. The epoxy resin mortar has appropriate curing time under high-temperature and dry climates and also has good compression strength and insulating property.

The invention discloses vacuum infusion resin and a preparation method and application thereof. The vacuum infusion resin comprises toughening epoxy resin accounting for 50-70% of the total mass of the vacuum infusion resin and a curing agent accounting for 30-50% of the total mass of the vacuum infusion resin. The vacuum infusion resin has the advantages that the toughening epoxy resin enhances the toughness of the vacuum infusion resin and lowers the viscosity of the vacuum infusion resin, and later process operations are facilitated; tetramethyl guanidine is used as the curing agent of the toughening epoxy resin and is moderate in curing time and curing temperature, and the cured vacuum infusion resin is low in viscosity and excellent in performance; the vacuum infusion resin is low in viscosity, high in toughness, simple in preparation method and widely applicable to pouring field of medium- and high-voltage electric insulating parts and has a long working life under 40 DEG C.

The invention provides a composition of a two-component marking coating and a preparation method thereof. The composition of the two-component marking coating comprises a component A and a component B, and the mass ratio of the component A to the component B is 3-3.5: 1. The component A is prepared from the following raw materials, by weight: 17 to 20 parts of acrylic resin, 15 to 18 parts of polycaprolactone polyol,1 to 1.8 parts of nano-zinc oxide loaded graphene oxide, 10 to 15 parts of modified hollow glass beads, 5 to 8 parts of titanium dioxide, 0.3 to 0.6 part of a silane coupling agent, 30 to 35 parts of fillers, 0 to 1.5 parts of pigment, 0.5 to 0.8 part of a dispersing agent, 0.2 to 0.3 part of a leveling agent and 0.1 to 0.3 part of a defoamer. The component B is a hexamethylenediisocyanate tripolymer. A coating film corresponding to the two-component marking coating is high in strength, toughness and hardness, has relatively high wear resistance and weather resistance, ishigh in bonding strength with a pavement, and is long in service life.

The invention provides a long-acting anti-icing coating for a high-pressure facility and a preparation method of the long-acting anti-icing coating. The long-acting anti-icing coating is prepared from the following raw materials in parts by weight: 1) a primer comprising 100 parts of hydroxyl-terminated polysiloxane, 10 to 20 parts of fumed silica, 5 to 15 parts of aluminum hydroxide, 5 to 15 parts of decabromodiphenyl ethane, 2 to 5 parts of a cross-linking agent, 0.1 to 0.5 part of a catalyst, 0.3 to 1.0 part of a coupling agent and 100 to 150 parts of 120# gasoline; and (2) a surface coating comprising 3-10 parts of low surface energy resin, 3-8 parts of nano silicon dioxide, 1-3 parts of a cross-linking agent, 0.1-0.3 part of a catalyst and 50-80 parts of ethyl acetate. According to the long-acting anti-icing coating disclosed by the invention, the primer and the surface coating are combined, so that the long-acting anti-icing coating has excellent super-hydrophobic property and good durability.

The invention discloses a large-volume and room-temperature cured epoxy resin glue filling material which is divided into glue filling formulas of different quality grades and can reach a maximum of grade 150 kg. The formula of grade 150 kg is prepared by the following raw materials by weight: 100 parts by weight of epoxy resin, 12 parts by weight of dibutyl phthalate, 8 parts by weight of acetone, 4.15% of triethylene tetramine and 0.2 percent of DMP-30. The epoxy resin glue filling material disclosed by the invention adopts a manner of mechanical mixing and stirring of bisphenol A epoxy resin, a non-reactive diluent, a fatty amine curing agent and an accelerant at a normal temperature; through performing an amplification experiment step by step, the dosages of a diluent and a curing agent are optimized; on the premise of ensuring the appropriate curing time, the curing reaction temperature is reduced to below 55 DEG C, so that the curing reaction heat and the curing temperature riseare greatly reduced, and the problem of high explosive polymerization possibility of the epoxy resin in the normal-temperature curing under large volume is solved.

The invention discloses an adhesive and a preparation method thereof. The adhesive comprises the following ingredients (by mass): 168.55 phr of a rubber compound, 25-40 phr of bonding resin and 250-450 phr of gasoline. The rubber compound comprises the following ingredients (by mass): 100 phr of butyl rubber, 50 phr of N660 and 18.55 phr of other systems. According to the invention, the rubber compound, bonding resin and gasoline are adopted, and the mass ratio of the rubber compound to bonding resin to gasoline is strictly controlled within the range of 1:0.15-0.24: 1.48-2.67. Thus, it can beensured that fluidity of the prepared adhesive is appropriate and viscosity of the adhesive at room temperature is within the range of 20,000-40,000 centipoises. In addition, when the prepared adhesive is in use, the curing time as required is proper, the adhesive effect is good, and the adhesive can meet the use requirement.

The invention discloses a dedicated press-clip type wiring box for a cadmium telluride thin film assembly. The wiring box includes a box body, a bottom board and a pedestal buckled to each other so asto form a mounting cavity. A diode is mounted in the mounting cavity. The box body is provided with a sunken mounting groove used for accommodating the diode. The mounting groove is provided with a boss protruding from the box body and formed on the back face of the box body. A plurality of radiating fins are arranged on the periphery of the boss. The box body is provided with a wire slot reaching the mounting groove from the edge of the box body. A cable is connected with the diode via the wire slot. The bottom board is in a shape corresponding to that of the mounting groove and can be nested in the mounting groove so as to form a plane with the bottom part of the box body. The middle part of the bottom board is provided with a sub box body which has a hollow bottom part. The box body with provided with a neck within the mounting groove. When the box body buckles with the bottom board, the neck is disposed in the bottom hollow part of the sub box. The edge of the bottom board is connected with a wire slot cover board capable of being spliced with the wire slot. The pedestal is provided with a pin, so that the pin is in associated connection with the neck when the pedestal is nested in the hollow part of the sub box.

The invention discloses a dedicated press-clip type wiring box for a cadmium telluride thin film assembly. The wiring box includes a box body, a bottom board and a pedestal buckled to each other so asto form a mounting cavity. A diode is mounted in the mounting cavity. The box body is provided with a sunken mounting groove used for accommodating the diode. The mounting groove is provided with a boss protruding from the box body and formed on the back face of the box body. A plurality of radiating fins are arranged on the periphery of the boss. The box body is provided with a wire slot reaching the mounting groove from the edge of the box body. A cable is connected with the diode via the wire slot. The bottom board is in a shape corresponding to that of the mounting groove and can be nested in the mounting groove so as to form a plane with the bottom part of the box body. The middle part of the bottom board is provided with a sub box body which has a hollow bottom part. The box body with provided with a neck within the mounting groove. When the box body buckles with the bottom board, the neck is disposed in the bottom hollow part of the sub box. The edge of the bottom board is connected with a wire slot cover board capable of being spliced with the wire slot. The pedestal is provided with a pin, so that the pin is in associated connection with the neck when the pedestal is nested in the hollow part of the sub box.

The invention relates to a magnetorheological porous soft mold and a plate forming device. The magnetorheological porous soft mold comprises an elastic base body with pores; and magnetic particles integrally formed in the elastic base body, wherein the magnetic particles are distributed in the elastic base body in a dispersed mode and located outside the pores. The elastic base body comprises at least two forming sections; all the forming sections are internally provided with the pores, and the porosity of at least one forming section is larger than that of the other forming sections, so that the elastic modulus of the forming sections with the large porosity is smaller than that of the forming sections with the small porosity; or at least one forming section is internally provided with the pores and at least one forming section is not internally provided with the pores, so that the elastic modulus of the forming sections with the pores is smaller than that of the forming sections without the pores. Through the design of the structure, when a blank is in complete contact with a special-shaped female mold, the stress of the whole blank is uniform, and the situation that the blank is broken due to the fact that the forming force is too large when a deeper part is formed is avoided.

The invention discloses a glass ionomer cement compound used for the dental department the matrix component of the glass ionomer cement compound comprises silicon-aluminum-fluorine glass powder and polycarboxylic acid liquor, wherein the polymerizable monomer of the polycarboxylic acid comprises 55-70 parts by weight of acrylic acids, 25-30 parts by weight of itaconic acids and 5-15 parts by weight of alkyl olefine acids. The invention prepares a tricarboxylic acid copolymer, the tricarboxylic acid copolymer is dissolved in water to prepare the polycarboxylic acid liquor used for the glass ionomer cement, the polycarboxylic acid liquor and the commercially available silicon-aluminum-fluorine glass powder are mixed and cured, and therefore, the prepared glass ionomer cement has the characteristic of high mechanical strength. Compared with the prior art, the glass ionomer cement compound can effectively improve the bending strength and the compressive strength of the glass ionomer cement, and the application range of the glass ionomer cement in the field of dental department restoration is expanded.

The invention provides an inorganic gelling material made from coal ash and waste glass and a preparation method of the inorganic gelling material. The inorganic gelling material comprises, by weight, 65-75 parts of silicate superfine powder and 25-35 parts of modified waste glass superfine powder. The preparation method includes mixing and grinding the coal ash, slaked lime and the waste glass, adding water, evenly stirring the mixture into a material ball, drying and cooling the material ball after hydrothermal treatment, and grinding the material ball into the silicate superfine powder; mixing and grinding the waste glass, granulated blast-furnace slag, silica sand, modifying agent and water to obtain the modified waste glass superfine powder; mixing the silicate superfine powder with the modified waste glass superfine powder, and grinding the mixture to obtain the inorganic gelling material. High-temperature calcination is not needed and heat consumption is low in the preparing process of the inorganic gelling material, utilization rates of the coal dust and the waste glass are high, curing time of the obtained material is proper, and the obtained material has high curing strength and high sulphate attack resistance.

The invention discloses an amido amine epoxy curing agent which comprises the following components in parts by weight: 30-55 parts of fatty acid, 30-60 parts of fatty amine, 5-20 parts of an epoxy modifier and 0.2-4 parts of an accelerant, the fatty acid is one or a mixture of more of C16-C20 higher fatty acid, oleic acid, linoleic acid, abietic acid and tall oil; the fatty amine is one or a mixture of more of diethylenetriamine, triethylene tetramine, tetraethylenepentamine and pentaethylenehexamine; the epoxy modifier is one or a mixture of more of C12-C14 alkyl glycidyl ether, 1, 4-butanediol diglycidyl ether, o-cresol glycidyl ether and trimethylolpropane triglycidyl ether. The amido amine epoxy curing agent is moderate in curing reaction time, low in viscosity and convenient to operate, has excellent adhesive force on a humid surface, and is particularly suitable for the field of civil engineering in a humid environment.