68results about How to "Slow down the curing speed" patented technology

A method for increasing mechanical strength of a dielectric film includes: providing an initial dielectric film containing porogen; irradiating the initial dielectric film with first UV light having a first wavelength which is substantially or nearly similar to a maximum light absorption wavelength of the porogen for removing the porogen; and then irradiating the porogen-removed dielectric film with second UV light having a second wavelength which is shorter than the first wavelength, thereby increasing mechanical strength of the dielectric film.

The invention relates to a method for preparing polyurethane hot melt adhesive capable of achieving quick positioning. The preparing method includes the steps that 1, reactive tackifier and hydrogenated bisphenol A are added into a reaction still, dehydration is conducted for 2 hours at the temperature of 110 DEG C and the pressure intensity of -0.095 MPa, the mixture is cooled to 70 DEG C, a catalyst and polyisocyanate are added, stirring is conducted at the rotation speed of 400-700 r/min, a reaction is conducted for 1-3 hours at the temperature of 70 DEG C-80 DEG C, then a silane modifier is added, a reaction is conducted for 2-5 hours at the temperature of 70 DEG C-80 DEG C, and modified prepolymer at the sending end of silane is obtained; 2, dehydration is conducted on polyester polyol, polyether polyol and acrylic resin for 2 hours at the temperature of 120 DEG C and the pressure intensity of -0.095 MPa, after dehydration is conducted, the polyisocyanate is added, stirring is conducted at the rotation speed of 400-700 r/min, a reaction is conducted for 1-3 hours at the temperature of 100 DEG C-120 DEG C, then the prepared modified prepolymer at the sending end of the silane, antioxygen and the catalyst are added, the temperature is raised to 110 DEG C, vacuumizing is conducted till the pressure intensity is below -0.095 MPa, air bubble removing is conducted for 30 minutes, discharging and sealed packing are conducted, and the polyurethane hot melt adhesive capable of achieving quick positioning is obtained.

The invention discloses a scraping coating type polyurea elastomer corrosion-resistant and wear-resistant material and a preparation method thereof. The scraping coating type polyurea elastomer corrosion-resistant and wear-resistant material is characterized by comprising an ingredient A and an ingredient B, wherein the ingredient A is prepolymers with NCO end groups obtained through the reaction between 30 to 40 mass percent of polyether polyol and 60 to 70 mass percent of polyisocyanates; the ingredient B is prepared from 30 to 40 mass percent polyaspartic acid ester, 60 to 70 mass percent of filling materials and a small number of auxiliary agents through high-speed dispersion grinding. In the use process, the prepared ingredient A and the prepared ingredient B are weighed according to the weight ratio of 1:4, and are then uniformly mixed; next, scraping coating construction is performed. The material has the characteristics of high mechanical intensity, corrosion resistance, wear resistance, good anti-seeping performance, aging resistance, proper reaction speed, no solvent, convenient construction and the like. The scraping coating type polyurea elastomer corrosion-resistant and wear-resistant material is particularly suitable for industrial and mining enterprise equipment and spare part anti-corrosion wear-resistant liners.

The invention relates to a high-temperature cured two-component pouring sealant and a preparation method thereof, and the heat-conducting pouring sealant is prepared by an A component and a B component according to the weight ratio of 100: 80-100: 125, wherein the A component comprises the following raw materials by weight percent: 45.00%-85.00% of heat-conducting powder, 14.00%-50.00% of low-viscosity liquid silicon oil, 0.15%-15.00% of silane curing agent, 0.005-0.02% of inhibitor, and 0.00-5.00% of color toner; and the B component comprises the following raw materials by weight percent: 45.00%-85.00% of heat-conducting material, 14.00%-55.00% of the low-viscosity liquid silicon oil, 0.04%-1.00% of catalyst and 0.00-5.00% of the color toner. The preparation method of the heat-conducting pouring sealant comprises the following steps: respectively preparing the A component and the B component, uniformly mixing the A component with the B component according to the weight ratio of 100: 80-100: 125 during the use, and heating and curing for 2 hours at the temperature of 60-80 DEG C for preparation.

The invention relates to a preparation method of a polyurethane hot melt adhesive adhered with a lower surface energy material. The polyurethane hot melt adhesive prepared by the method provided by the invention has favorable flexibility and body tensile strength, can overcome the influence of an expansion factor difference between different materials, and is uniform in stress distribution so as to adapt to base materials in different types; an anti-dropping performance is good: the times for dropping a roller is higher than 300 times; the adhesion strength is high: the adhesion strength of PEI and a nickel-plated steel disc is higher than 6.0MPa; salt spray resistant and ageing-resistant performances are good: no damage is caused after a salt spray test is carried out for 500 hours, and no remarkable intensity attenuation is caused after a dual-85 test is carried out for 1000 hours.

The invention discloses an air filtration membrane with functions of killing bacteria and removing formaldehyde. The air filtration membrane is of a three-layer nanofiber membrane composite structure, wherein the upper layer is an activated carbon nanofiber membrane, the middle layer is a pure TiO2 nanofiber membrane, and the lower layer is a nano-silver antibacterial fiber membrane; the pure TiO2 nanofiber membrane is prepared from a high polymer material/TiO2 precursor composite nanofiber membrane through heat treatment, and the high polymer material/TiO2 precursor composite nanofiber membrane is prepared with an electrospinning method; the activated carbon nanofiber membrane is an electrospun activated carbon nanoparticle/high polymer material composite nanofiber membrane; the nano-silver antibacterial fiber membrane is an electrospun nano-silver particle/high polymer material composite nanofiber membrane. The air filtration membrane not only can filter solid particulate pollutants very well, but also is good in breathability, and can remove and decompose formaldehyde in air and filter and kill harmful bacteria in air, thereby guaranteeing health of a respiratory system better.

The invention relates to an anaerobic plane sealant which has an effect of increasing the curing speed on an aluminum and aluminum alloy material, and a preparation method of the anaerobic plane sealant. The invention mainly provides a novel approach of promoting the curing speed of the anaerobic plane sealant on aluminum and aluminum alloy without influencing the storage stability. The method comprises the step of adding a proper amount of water and dimethyl sulfoxide into an anaerobic curing sealant containing polyurethane-methacrylate prepolymer, free radical polymerizable monomer, organic peroxide, an accelerant and a stabilizer. The preparation method provided by the invention is simple and convenient, and the anaerobic plane sealant has excellent storage stability, and can still be used for quickly well adhering aluminum and aluminum alloy at a low-humidity environment.

The invention discloses a method for preparing large-diameter high-sphericity polymer hollow micro-spheres. The method has the advantages that curing speed reducing and rotary curing processes are organically combined with one another, curing containers are sealed in procedures for preparing polymer hollow micro-spheres by the aid of microfluidic technologies, the quantities of dual-emulsion particles in external water phases and the quantities of preliminarily added organic solvents are changed, diffusion of the organic solvents towards the external water phases can be suppressed by the aid of the solubility of the organic solvents in the external water phases, the curing speeds of dual-liquid droplet can be reduced, and spheroidization of the dual-emulsion particles can be promoted; horizontal inclination angles, rotation modes and the rotational speeds of rotary flasks are controlled, accordingly, dispersion states of the dual-emulsion particles in the external water phases can be controlled, adhesion, coalescence and emulsion breaking of the dual-emulsion particles due to mutual collision can be prevented, non-spheroidization tendency of the dual-emulsion particles can be lowered, and the large-diameter high-sphericity polymer hollow micro-spheres can be prepared; the large-diameter high-sphericity polymer hollow micro-spheres can be applied to laser inertial confinement fusion physical experiments.

The invention discloses a portable thermal-insulation cup, and belongs to the technical field of articles of daily use. The portable thermal-insulation cup comprises a cup body, an inner cup lid, an outer cup lid, a locking device, a detection device, a base, an infrared sensing switch and a controller; the cup body is internally provided with an inner cavity, the inner cup lid is arranged at the upper portion of the cup body, and the outer cup lid is hinged to the upper portion of the inner cup lid, and is provided with a first lug which is matched with the locking device to lock the outer cup lid; the locking device comprises a second lug, a pressing rod, an electromagnet, an elastic part and a second overturn shaft; the detection device is inset at the upper edge of the inner cup lid; the base is arranged at the bottom of the cup body, and is provided with an electric appliance mounting cavity; the infrared sensing switch is arranged at the outer circumference surface of the base; the controller is arranged in the electric appliance mounting cavity. According to the portable thermal-insulation cup, automatic opening and locking of the outer cup lid are achieved, and the problem that the cup opening is easily contaminated when a lid of a traditional thermal-insulation cup needs to be unscrewed with hands is solved.

The invention discloses a self-polymerized consolidated pressure-resistant permeation-increasing temperature-resistant sand preventing agent. The self-polymerized consolidated pressure-resistant permeation-increasing temperature-resistant sand preventing agent comprises the following components, in percentage by mass: 30-40% of a resin compounding system; 40-50% of an organic solvent; 5-7% of a coupling agent; 5-8% of a filler; 4 to 5% of a curing agent, and 5 to 8% of an emulsifier; wherein the sum of the mass percentages of the components is 100%; the curing agent is p-nitrobenzoic anhydrideand tetrachlorophthalic anhydride which are mixed in equal mass; the filler is high-temperature-resistant multi-mineral fine powder and phenolic fiber; and the high-temperature-resistant multi-mineral fine powder is a mixture of magnesium oxide, aluminum oxide and silicon oxide; the resin compounding system is formed by compounding epoxy resin E-44, epoxy resin E-51, phenolic resin F-51 and polyvinylpyrrolidone K30. The sand preventing agent is mainly used for chemical sand control of high-temperature and high-pressure wells, can be injected into stratums without moving tubular columns, andachieve the purposes of sand control and sand consolidation.

The invention provides an additive with urea formaldehyde, a preparation method and a urea formaldehyde resin adhesive. The additive is provided by the invention. The raw material of the additive is comprised of the dispersion medium, the dried egg white of the degreased bean and the complexing agent, the weight ratio of the raw material is: 70-80 of dispersion medium, 20-35 of dried egg white of the degreased bean, 1-3 of complexing agent, the complexing agent is consisted of the aluminium sulphate and the zirconium carbonate with the weight ratio of 0.4-2.4:1. The additive provided by the invention contains dried egg white of the degreased bean, and then both the bond strength of the prepared veneer is increased and the formaldehyde emission of the preparing artificial slabs is effective decreased when adding the additive into the urea formaldehyde.

The present invention relates to silane crosslinking catalyst comprising: —75 to 85 wt.-% of an olefin acrylate interpolymer and—15 to 25 wt.-% of a hindered amine light stabilizer (HALS) having a number average molecular weight Mn of 1500 to 4000 g/mol; and—optionally up to 5 wt.-% wax, wherein the silane crosslinking catalyst is free of tin, carboxylic acid(s) and sulphonic acid(s), all weight percentages with respect to the total weight of the silane crosslinking catalyst.

The invention relates to a high-solid-content and low-viscosity polyaspartic acid ester primer-topcoat coating suitable for high-pressure airless spraying and a preparation method thereof. The high-solid-content low-viscosity polyaspartic acid ester primer-topcoat coating comprises the following components in percentage by mass: 30-40% of polyaspartic acid ester resin; 10%-20% of polyester resin;0.3%-1.5% of a dispersing agent; 0.3%-1.0% of a defoaming agent; 1%-3% of a dehydrating agent; 0.3%-0.8% of a leveling agent; 0.4%-1.5% of an anti-sagging agent; 1%-3.0% of an ultraviolet absorber; 34%-45% of pigment; 10%-25% of a filler; 6%-10% of a solvent; 20%-29% of curing agent. Conventional high-pressure airless spraying equipment can be adopted for construction, it is guaranteed that the mixed paint can be normally constructed after 30 min at the environment temperature of 30 DEG C, the surface of a paint film is leveled normally, the defects of pinholes, shrinkage cavities, bubbles andthe like are avoided, the weather resistance, gloss retention, color retention and weather resistance are excellent, the solid content is high, and the requirements of environment-friendly paint aremet; the one-time film forming thickness can reach 150-350mu m, the surface drying and hard drying time is fast, and the working life is long.

The invention provides an electric water heater and belongs to the technical field of water heater water tanks. The electric water heater comprises a shell. Three inner containers are arranged in the shell from top to bottom. A heat insulation layer is arranged between the shell and the inner containers. The three inner containers are adopted in the electric water heater, according to the principle that hot water ascends and cold water descends, the positions of connecting pipes among a water inlet, a water outlet and the inner containers are ingeniously arranged so that hot water can rapidly and preferably reach the hot water outlet position, and the purpose of rapidly taking hot water is achieved. A common water heater is only provided with one temperature sensor to detect the temperature of a water outlet, however, the electric water heater is provided with multiple temperature sensors and multiple heating devices in the different inner containers to achieve classified heating, and therefore control can be more accurate. The electric water heater has the beneficial effects that the water temperature increasing speed is high, the heat preservation effect is good and lasting, and use is safe and healthy.

The invention relates to an epoxy cured 70:30 polyester resin excellent in levelability and solvent resistance, and a preparation method thereof, and belongs to the technical field of power paint chemistry. According to the preparation method, long chain flexible raw materials such as tetradecanedioic acid are adopted, so that polyester melting viscosity is reduced effectively, and coating film surface levelability is improved; high-functionality fluorine-containing end-capping reagent tetra(3, 4, 5, 6-tetrafluorophthalic acid) pentaerythritol ester is adopted for polyester end capping to reduce polyester resin carboxyl end group activity, reducing curing speed with E-12 epoxy resin, prolonging gelling time, ensuring enough leveling time, and achieving excellent cured coating film levelability; the end capping reagent is extremely high in functionality, so that cured coating film crosslinking density is large; end capping reagent self fluorine content is high, so that the cured coatingfilm possesses excellent resistance on routine organic solvents; the epoxy cured 70:30 polyester resin is applied in powder paint, so that coating layers excellent in levelability and solvent resistance are obtained. The raw materials are easily available, operation of the preparation process is simple and convenient, the preparation method is suitable for large scale production, and it is benefical for improvement of powder paint popularization and applications.

The invention relates to an energy-saving paint and a preparation method thereof. The paint comprises epoxy acrylate, butyl acetate, ethylene glycol, sodium fatty alcohol sulfate, polyurethane acrylate, polyester acrylate, a polyfunctional monomer, a pigment, a leveling agent and a dispersant. The paint prepared through mixing above components and processing the obtained mixture has the advantages of good adhesion, low cost of materials, realization of energy saving, emission reduction, few raw materials and wide raw material sources in the making process, certain environmental protection meaning, difficulty in color fading, no pollution to environments, very good water resistance, bright color, smooth surface and very good practical effects.

The invention belongs to the technical field of coatings, and particularly discloses a solvent-free environment-friendly coating and a preparation method thereof, which comprises the following raw materials in percentage by mass: 50-60% of polyester resin and 2-10% of hydroxyalkyl amide, 15-25% of auxiliary materials, 10-15% of pigment and filler and 3-5% of nano calcium carbonate, 3% -5% of hollow glass beads and 0.02% -0.1% of a curing inhibitor, 0.1-0.5% of a lubricant, 0.5-2% of a flatting agent and 0.5-1% of benzoin, 0.5-1% of an ultraviolet absorbent and 0.5-1% of an anti-ultraviolet absorbent; and the auxiliary material comprises high-gloss barium sulfate, precipitated barium sulfate and calcium carbonate; the pigment filler comprises titanium dioxide and mica powder. According to the invention, the polyester resin is selected as the main raw material and is safe and non-toxic hydroxyalkyl amide (HAA)) is a curing agent, and nano calcium carbonate and hollow glass beads are added, a curing inhibitor and a lubricant, so that the problem that a pinhole phenomenon of an HAA system coating is easy to occur is solved, the comprehensive performance of the coating is improved, andthe dispersibility, leveling property and weather resistance are improved.

The invention discloses a production method of bamboo floor, which comprises the steps of material selection, cooking treatment and drying of bamboo battens, finish planing of the bamboo battens, sorting, adhesive coating and assembly, hot press and surface finishing. The production method is characterized in that: after the bamboo battens are subjected to finish planing, separation of surface patches from bottom patches is carried out, adhesive is coated and the color selection of the surface patches is carried out. According to the production method disclosed by the invention, the problems of difficulty in controlling the color difference and the like in the traditional production process of the bamboo floor are solved; and the production method has the advantages of simple work procedures, convenience in operation, small color difference and the like.

The invention relates to an LED lamp. The LED lamp comprises a tube and a metal lamp holder capable of being used for high-frequency heating, wherein the tube comprises a straight part and necked parts arranged at two ends of the straight part, and smooth transition sections are arranged between the necked parts and the straight part; a lamp belt adheres to the straight part by the aid of an adhesive, and a patch power supply and LED light-emitting units are arranged on the lamp belt; the metal lamp holder is arranged outside the necked parts and is closely connected with the necked parts by the aid of welding mud; the metal lamp holder is 10-12 mm long, the necked parts are 6-8 mm long, and the gap between the metal lamp holder and the necked parts is 1-2 mm; the patch power supply is arranged in the position close to one end of the straight part, and the distance between the patch power supply and the end of the straight part is 3-5 mm. The LED lamp is simple in structure, high in lighting efficiency and low in rejection rate, comprises few components, is beneficial to industrial production line production and has unique technical advantages in aspects of breaking through the production bottleneck and substantially increasing the profit margin of products, and the welding mud is efficient and quick to solidify.

An aqueous UV free radical curable inkjet ink contains a liquid phase A dispersed in a continuous liquid phase B by a polymeric dispersant; wherein the liquid phase A contains at least a photoinitiator, a colour pigment, and one or more polymerizable compounds, and the continuous liquid phase B contains water and optionally one or more organic solvents.

The invention discloses a system and method for eradicating flow marks and water inclusion marks of a spraying-free material during processing and forming, wherein the system comprises a mold, an electromagnetic induction coil and a high-frequency alternating current generation device; the mold is used for injection molding of the spraying-free material; the electromagnetic induction coil is disposed on the surface of the mold; and the high-frequency alternating current generation device is electrically connected with the electromagnetic induction coil. According to the system and the method in the invention, the mold is heated in an electromagnetic heating manner, so that the mold is rapidly heated to the temperature close to or higher than the melting temperature of resin in the spraying-free material; on the one hand, the curing speed of the fluid spraying-free material in a mold cavity is reduced; on the other hand, the viscosity of the fluid spraying-free material in the mold cavity is reduced; the shear strength of powder in the fluid spraying-free material in the mold cavity is greatly reduced; the arrangement and curing time of the powder in the cavity is prolonged; the arrangement intensity of the powder is obviously reduced; and the problems of the flow marks and the water inclusion marks of the spraying-free material during processing and forming can be completely eradicated.

The invention discloses a method for changing the curing speed of raw lacquer, and belongs to the technical field of polymer coatings.Inorganic salt is added into the raw lacquer. The inorganic salt comprises one or more of sodium chloride, potassium chloride, copper chloride, calcium chloride, magnesium chloride, sodium sulfate, potassium sulfate, copper sulfate, sodium phosphate, sodium nitrate, sodium bicarbonate, sodium carbonate, potassium carbonate, sodium sulfite or sodium hydrogen sulfite. On the premise of not destroying the structure of the water-in-oil emulsion, the laccase activity is regulated by using inorganic salt for the first time; The drying time of the paint liquid is prolonged and recovered, the problem of film formation waste caused by long-term storage and transportation of the paint liquid can be avoided, but the drying time of the paint liquid can be recovered or shortened by adding sodium carbonate and/or sodium chloride again in actual use.