37results about How to "Slow expansion" patented technology

The invention discloses a water-based ultra-thin fire-retardant coating for steel structures. The fire-retardant coating comprises components as follows: a binder emulsion, an intumescent flame retardant system, filler, deionized water and additives, wherein the additives comprise a dispersing agent, an antifoaming agent, a mold inhibitor, an anti-flash-rust agent, a coalescing agent, a leveling agent and a thickener; the intumescent flame retardant system comprises a dehydration catalyst, a carbonizing agent and a foaming agent. The invention further designs a preparation method of the water-based ultra-thin fire-retardant coating for the steel structures. The components are mixed sequentially to be prepared into the water-based ultra-thin fire-retardant coating for the steel structures in a vertical sand mill and a dispersing tank. The prepared coating is large in adhesive force, high in hardness, good in fireproof property, good in anti-scratch performance and excellent in weather resistance and water resistance, the surface layer of the coating is fine and smooth, the decoration performance is improved significantly, and the preparation method is low in energy consumption and has the advantages that the harm to human bodies and the pollution to the environment during preparation are small and the like.

The invention relates to a low-expansion-rate nano-level water absorption microsphere and a preparation method thereof. The prepration method comprises the following steps: preparing a water-phase mixed liquid: uniformly mixing acrylamide, acrylic acid, a cationic monomer, a crosslinking agent and water, and then adding an alkaline substance, thus obtaining the water-phase mixed liquid; preparingan oil-phase mixed liquid: uniformly mixing an oil solvent, a hydrophobic monomer and an emulsifier, thus obtaining an oil-phase mixed liquid; performing polymerization: homogenizing the oil-phase mixed liquid, then feeding nitrogen to remove oxygen, adding an initiator to initiate the polymerization, and controlling temperature of a system to not exceed 70 DEG C through refrigeration equipment; performing post-treatment: after the polymerization reaction is ended, adding nonylphenol polyoxyethylene ether into the reacted mixed liquid, thus obtaining the low-expansion-rate nano-level water absorption microsphere. The microsphere obtained by the method is small in particle size distribution range, low in expansion rate within 30 to 100 nm; the expansion is started within 1 to 2 hours; the low-expansion-rate nano-level water absorption microsphere is particularly applicable to blocking of a special compact bottom layer block.

The invention relates to the fields of manufacturing and application of heat-resistant, heat-insulating, flame-retardant and high-temperature expansion materials, specifically to a hydrogel with fireproof and cooling functions and a preparation method thereof. The hydrogel comprises the following components in parts by mass: 0.05-20 parts of a hydrogel thickening agent, 5-35 parts of a freezing point depressant, 1-30 parts of an expanded foam material, 1-15 parts of an expanded flame retardant, 0.01-1 part of a foaming agent, 1-15 parts of a gas generating agent and 0.01-1 part of a bactericide. The hydrogel provided by the invention has the following innovations: when the hydrogel directly acts on the surface of a comburent, the hydrogel can be adhered to the surface of the comburent; meanwhile, foams can be generated on the surface of the comburent and contain water, so the water can be sealed in the foams to continuously exert cooling and fire extinguishing effects; after the wateris dried, an expansion flame-retardant layer can be formed to provide continuous heat-insulation and flame-retardant functions; and the functions of fire extinguishing, cooling, heat insulation and fire reburning prevention are achieved.

The invention discloses ductile cast iron for a brake disc of a heavy-duty truck, which consists of the following components in percentage by weight: 0.5 to 0.6 percent of molybdenum, 0.008 to 0.02 percent of antimony, 3.6 to 3.8 percent of carbon, 2.0 to 2.5 percent of silicon, 0 to 0.4 percent of manganese, 0 to 0.02 percent of sulfur, 0 to 0.04 percent of phosphorus, 0.03 to 0.06 percent of magnesium, 0.02 to 0.05 percent of rare earth, and the balance of iron. The ductile cast iron has the characteristics of having high thermal fatigue property and wear-resisting property under the use condition of cold and heat circulation, prolonging the service life of the brake disc of the heavy-duty truck, having high strength, low carbide content, good toughness and small heat stress, and greatly improving thermal fatigue strength.

The invention discloses an internet website information search method and a search system. The internet website information search method includes the steps that a search engine obtains internet website update data, builds an index according to website data synchronously obtained and stores the index into an index database; and the search engine receives search requests of internet websites, retrieves corresponding search results from the index database according to the received search requests and returns the search results to the internet websites for display. The search system comprises the search engine independent of the internet websites, a first synchronous module and a search receiving and sending module. The first synchronous module and the search receiving and sending module are arranged on one side of the internet websites. The search engine comprises a second synchronous module, an index building module, the index database and an index module. Through adoption of the internet website information search method and the search system, search efficiency, search accuracy and search timeliness of website information search can be improved.

The invention relates to a novel steel structure fireproof paint. The paint comprises the following components by weight: 20-30 parts of a flame retardant, 30-40 parts of a film-forming base material, 20-25 parts of an expansion agent, 20-30 parts of a binding agent, 0.5-1 part of a preservative, 6-8 parts of a charring agent, 1-1.5 parts of a leveling agent, 0.5-1 part of a mould inhibitor, 10-12 parts of a stabilizer, 5-8 parts of a dispersant and 30-40 parts of water. The formula involved in the invention obviously improves the fire resistance of the paint, and the paint has the advantages of high transparency, stable chemical properties, high mechanical strength, and good heat resistance, etc.

The invention provides a base makeup product suitable for oily skin, and a preparation method thereof, and belongs to the technical field of cosmetics. The base product suitable for oily skin comprises an oil-water balance composition, a coloring agent, an emulsifier, a thickening agent, an emollient, a humectant, a functional additive and deionized water; and the oil-water balance composition is composed of a film-forming agent, a filling agent, a barrier repairing agent and a cooling sedative. The oil-water balance composition is applied to the base product suitable for oily skin and mixed with other components disclosed by the invention for use, and compared with a common oily skin base product, the oil-water balance composition can well regulate and control the skin state in multiple dimensions, control the oil outlet condition inside and outside, and establishes a barrier to achieve the consistent effect.

The invention relates to a surgical instrument for dilating the cervix uteri in a gynecological operation, in particular to a cervix uteri dilating instrument capable of dilating the cervix uteri and clamping the cervix uteri at the same time. The cervix uteri dilating instrument is composed of a cervix uteri dilating rod capable of realizing spiral expansion and a cervix holding forceps body, wherein the cervix uteri dilating rod is composed of a shell and a rod core; the cervix uteri dilating rod is inserted into the inner opening of the cervix uteri, and the forceps body is closed to clamp the cervix; the rod core is inserted into the shell of the cervix uteri dilating rod, the rod core gradually enters the threaded part of the shell by rotating a rod core handle clockwise, and when the rod core goes deep into the conical part of the shell, the top end of the shell of the cervix uteri dilating rod gradually expands outwards, so the inner opening of the cervix is slowly expanded; the dilation degree of the shell of the cervix uteri dilating rod is controlled along with the insertion depth of the rod core; and the rod core handle is rotated anticlockwise, the shell is gradually folded, the forceps body is opened, and the cervix uteri dilating rod is taken out by retreating. The instrument can dilate the cervix uteri in a controllable and closed mode, so local stimulation is small; the cervix uteri dilating rod does not need to be replaced in a dilating process or to be inserted into the uterine cavity repeatedly, so influence on the form in the uterine cavity is small, and infection risks are few; and fracture is avoided when the instrument is taken out, cervix uteri traction force is small, and cervix uteri damage is small.

The invention relates to a slow-expansion plugging material used in the field of oilfield drilling. The preparation method comprises the following steps: sequentially adding distilled water, a water-soluble polymeric monomer, a water-soluble initiator, a water-soluble cross-linking agent and an inorganic reinforcing agent, stirring and mixing at a high speed at 0-5 DEG C under the protection of nitrogen, slowly heating until the system becomes viscous, pouring the viscous system into a prepared oil-engine system of an oil-soluble polymeric monomer, an oil-soluble initiator and an oil-soluble cross-linking agent, and carrying out heating reaction to prepare the slow-expansion plugging material. The product disclosed by the invention has an obvious expansion delaying effect, and the expansion retarding and plugging material still has relatively strong expansion capacity after 48 hours.

The invention discloses an embolism microsphere capable of being secondarily expanded. The invention relates to a water-based adhesive which is prepared from vinyl pyrrolidone, acrylic acid, sodium acrylate, methacrylic acid, sodium methacrylate, acrylamide, 2-acrylamide-2-methyl propanesulfonic acid, 2-acrylamide-2-methyl propanesulfonic acid sodium salt, allylamine, allylamine hydrochloride, dimethyl diallyl ammonium chloride and water. The preparation method comprises the following steps: carrying out cross-linking polymerization on one or more monomers in methyl acryloyl ethyl sulphobetaine to obtain a microsphere, carrying out primary expansion on the microsphere in pure water at 20 DEG C for 1-2 hours until the diameter is 2-3 times that of the microsphere in a dry state, taking out the microsphere, putting the microsphere in a PBS (Phosphate Buffer Solution) with a pH value of 7.4 at 37 DEG C for 48-72 hours, and carrying out secondary expansion, so that the diameter of the microsphere expanded again is increased by 10-30% compared with that of the microsphere expanded for the first time, and the diameter of the microsphere expanded again is increased by 10-30% compared with that of the microsphere expanded for the first time. According to the present invention, the suppository can primarily swell in water or a drug solution, can swell again in the blood vessel environment at the body temperature after being conveyed to the embolism position in the blood vessel, has characteristics of slow swelling speed, limited swelling rate, safety and controllability, can fully fit the shape of the blood vessel, can strengthen the embolism effect, and can easily achieve permanent embolism;

The invention provides a novel fireproof coating for a steel structure. The novel fireproof coating comprises the following components in parts by weight: 20 to 30 parts of magnesium hydroxide, 20 to30 parts of ammonium polyphosphate, 30 to 40 parts of amino resin, 10 to 20 parts of propylene resin, 20 to 25 parts of an acrylic emulsion, 20 to 30 parts of a viscosifying agent, 0.5 to 1 part of apreservative, 6 to 8 parts of a carbon-forming agent, 1 to 1.5 parts of a leveling agent, 0.5 to 1 part of a mildewproof agent, 10 to 12 parts of a stabilizing agent, 5 to 8 parts of a dispersant and30 to 40 parts of water. According to a formula provided by the invention, the fire resistance of the coating is significantly improved; and the coating provided by the invention has the advantages ofhigh transparency, stable chemical properties, high mechanical strength, good heat resistance, etc.

The invention relates to a microwave maser, and concretely relates to a long-service-life micro-column array graphite and metal composite cathode structure for the microwave maser, and a preparation method thereof. The invention aims to solve the technical problems that the existing micro-column graphite cathode structure loses the effect of stably emitting electron beams due to the fact that a convex emission structure is seriously consumed and even completely loses the convex emission structure, and the porous structure of a graphite material is easy to release gas after being bombarded by electron beams, so the vacuum degree of the system is reduced, the coupling efficiency of beam waves is reduced, and the insulativity of system devices is reduced. The cathode structure comprises a micro-column array graphite cathode, and the micro-column array graphite cathode comprises a knife-edge-shaped annular graphite cathode base body and a plurality of graphite micro-columns arranged on the surface of a knife edge of the knife-edge-shaped annular graphite cathode base body in an array mode. The cathode structure is characterized in that metal coatings are uniformly adhered to the surface of the knife-edge-shaped annular graphite cathode base body and the top ends and the side walls of the graphite micro-columns, and the metal coatings are made of refractory metal.

The invention discloses an incision balloon dilator special for pleuroperitoneal cavity surgery. The incision balloon dilator further comprises a plurality of dilating rings, wherein the same balloon is arranged on the arc-shaped inner sides of the dilating rings; one side of each dilating ring is fixedly connected with a plurality of shaping wires; the shaping wires are arranged to limit the corresponding portions of the balloon to form a concave structure when the balloon expands; a plurality of liquid discharging holes are formed in the concave structure; liquid discharging branch pipes are fixedly connected to the liquid discharging holes; a liquid discharging annular pipe is arranged in the balloon; one end of each liquid discharging branch pipe is fixedly connected to the liquid discharging annular pipe; a liquid discharging main pipe is fixedly connected to the side wall of the liquid discharging annular pipe; and one end of the liquid discharging main pipe penetrates through the balloon. According to the scheme, tissue fluid generated at the contact position of an incision and the balloon dilator is discharged, other complications caused when the tissue fluid drips into the body of a patient are avoided, the balloon makes contact with the incision, and therefore the incision tissue is prevented from being damaged.

The invention discloses an upper limb multi-joint linkage rehabilitation therapeutic apparatus, and relates to the technical field of joint therapeutic apparatuses. The apparatus comprises: a support frame; a connecting shoulder fixedly connected to the lower part of the support frame; a shoulder joint assembly at least comprising a shoulder ring and a shoulder sleeve which are hinged to each other, wherein the shoulder ring is vertically fixed below the connecting shoulder, and a first traction assembly is further hinged between the shoulder ring and the shoulder sleeve; and an elbow joint assembly connected to the lower part of the shoulder joint assembly. The first traction assembly at least can perform active traction, and enables the shoulder sleeve to relatively deflect by 45 degrees; and a plurality of massage head assemblies are uniformly distributed on the shoulder joint assembly and the elbow joint assembly.

The invention discloses an on-line repairing method for weld defects of an in-service GIS shell of a transformer substation. The method comprises the following steps: detecting an SF6 gas pressure leakage alarm signal in the operation process of the GIS equipment, and finding a gas leakage area of the GIS shell on site; in the vicinity of the gas leakage area, measuring the direction and the size of the weld defect by using an ultrasonic flaw detector; carrying out finite element modeling, analysis and calculation on the GIS shell and then carrying out defect safety evaluation; marking welding seam defects, and performing groove treatment; filling the groove is filled with metal glue, and trimming the surface appearance to be consistent with the surface of the weld joint; and applying a reinforcing plate to the weld defects for reinforcing and repairing. According to the on-line repairing method, gas leakage defect treatment can be completed on the premise that equipment is not disassembled, normal operation of the equipment is not affected, and the efficiency and economical efficiency of gas leakage defect treatment are remarkably improved.

Disclosed are benzamide derivatives useful in slowing the expansion of cancer cells.

The invention discloses a fireproof coating for steel, and belongs to the field of industrial cleaning agents. The fireproof coating for steel comprises, by weight, 30-50 parts of acrylic resin, 20-30parts of TBA epoxy resin, 10-20 parts of an intumescent flame retardant, 5-10 parts of oxidized paraffin, 3-5 parts of titanium dioxide, 1-3 parts of bentonite, 1-3 parts of dimethicone, 2-5 parts ofammonium molybdate and 100-200 parts of deionized water. The coating has the advantages of large amount of generated carbide, small amount of formed smoke, strong coating adhesion and good acid and alkali resistance.

The invention relates to a preparation method of a novel fireproof coating for a steel structure. The preparation method comprises the following steps: 1) proportioning according to weight parts and selecting the following raw materials for subsequent use: 20 to 30 parts of ammonium polyphosphate, 30 to 40 parts of film-forming basic material, 20 to 25 parts of expanding agent, 20 to 30 parts of viscosity agent, 6 to 8 parts of charring agent, 1 to 1.5 parts of leveling agent, 0.5 to 1 part of mildew inhibitor, 0.5 to 1 part of preservative, 10 to 12 parts of stabilizing agent, 5 to 8 parts ofdispersing agent and 30 to 40 parts of water; adding the water, the ammonium polyphosphate, the film-forming basic material, the viscosity agent, the charring agents and the dispersing agent into a dispersion cylinder; 2) stirring for 30 to 40 minutes to obtain an evenly-mixed mixture; grinding the mixture obtained in the step (2) and sieving the mixture by using a 120-mesh sieve; adding the expanding agent, the mould inhibitor, the leveling agent, the stabilizing agent and the preservative into the mixture obtained in the step (3) and fully mixing, dispersing the mixture for 35 to 45 minutesat rotation speed of 550 to 650r/min and then discharging to obtain the fireproof coating for the steel structure.