480results about How to "With high and low temperature resistance" patented technology

The invention discloses an inorganic heat insulation load-bearing concrete, belonging to the technical field of heat preservation load-bearing concrete. The invention aims at solving the problem of providing a concrete which not only can meet the requirements of stress performance of structural components of buildings, but also has good heat preservation property. The adopted scheme comprises: the concrete comprises the components with mix proportion by weight (kg/m<3>): the ratio among composite lightweight doped-aggregate, cement, sand, carpolite, ceramsite, pulverized fuel ash, water and admixture is (6-225): (200-800): (300-700): (500-1600): (150-650): (10-600): (80-400): (0.1-200); wherein the composite lightweight doped-aggregate is one or mixture of more in vitrified micro-bead, vermiculite, expanded perlite and modified expanded perlite, and has the density of (50-180)kg/m<3>. Therefore, the load-bearing concrete can be widely applied to the field of building technology.

The invention relates to a method for making hydrogen-containing silicone oil, in particular to a method for making methyl phenyl hydrogen-containing silicone oil for the encapsulation of LEDs. The method is characterized in that the methyl-phenyl cyclic siloxane (Dn<Me, Ph>), the tetramethyl tetraethyl cyclic tetra-siloxane (D4<Me, Et>) and hydrocyclotetrasiloxane (D4<H>) are taken as monomers; under the protection of N2, right amount of an end capping agent is added into the monomer mixture to be copolymerized under the action of a catalyst, after the polymerization, the catalyst is filtered and recycled, the low molecular compound of the obtained clear solution is removed in decompression and high temperature conditions, the clear solution without low molecular compound is cooled to the room temperature, and the target product is obtained. The method has the advantages of available raw materials, low cost, moderate conditions, simple technique, simple operation, environmental protection and convenient industrialization. The product made by the method can be widely applied to the enterprises which manufacture and use the LEDs, etc.

The invention relates to a power cable insulating layer material and a preparing method thereof. The material comprises, by weight, 70 parts of polyvinyl chloride, 3 parts of ethylene-vinyl acetate copolymer, 10 parts of polyvinylidene chloride, 10 parts of methyl vinyl silicone rubber, 15 parts of GNA type chloroprene rubber, 5-6 parts of epoxy fatty acid essien ester, 1 part of barium stearate, 10 parts of aluminum hydroxide, 5 parts of compatilizer, 8-10 parts of fire resistant systems and 0.1 part of antioxygen. The prepared fire resistant cable material is obvious in synergistic effect, good in antioxidant effect, high in stability and obvious in fire resistant effect, and has wide application prospects.

The invention discloses a method for preparing an organic substance, in particular to a method for preparing methyl phenyl cyclosiloxane for LED packaging. The method takes methyl phenyl cyclic siloxane (Dn<Me, Ph>, n is equal to 3 and 4) and tetramethyl tetrahydric cyclotetrasiloxane (D4<H>) as monomers; under the protection of N2, an end-capping agent is added into the cyclosiloxane monomer which is subjected to pressure reduction and water removal to copolymerize under the action of a catalyst, then the filtration is performed to recover the catalyst, and the a low molecular compound in clear solution is removed under the condition of pressure reduction and high temperature and then is cooled to room temperature to produce a target product. The method has the advantages of easily-obtained raw materials, low cost, mild conditions, simple process, simple and convenient operation, no pollution, and easiness for industrialization. A product prepared by the method has good effect in the packaging process of LEDs.

This invention relates to a composite damp material with a metal rubber interlayer, in which a metal rubber layer is clamped between a base layer and a restriction layer, the lower surface of the metal rubber layer and the top surface of the base layer, the top surface of the rubber layer and the lower surface of the restriction layer are glued together by adhesives to prepare a composite damp material with a metal rubber interlayer, which replaces traditional rubber materials with metal rubber material having the advantages of anti-corrosion, anti-aging, high and low temperature resistant and not volatile in vacuum.

The invention relates to a colourful environmental-friendly synthesized polymer waterproof paint which comprises the following components in parts by weight: 3-7 parts of petroleum resin, 5-15 parts of styrene-ethylene-butylene-styrene (SEBS), 5-15 parts of styrene-butylene-styrene (SBS), 5-10 parts of thermoplastic polyurethane elastomer, 4-8 parts of terpene resin, 4-8 parts of poly-alpha-methyl styrene, 2-5 parts of tung oil, 10-15 parts of mica powder, 0.2-0.5 part of antiager D, 0.2-0.5 part of antioxidant 264, 0.2-0.5 part of defoaming agent, 0.3-0.5 part of ultraviolet absorber, 35-45 parts of 120 # solvent, 5-15 parts of butyl acetate and 1-3 parts of color paste. The paint has the characteristics of unique waterproof property, acid-base resistance, ultraviolet irradiation resistance, heat insulation, anti-aging property, high adhesion strength, water repellent, good leakage-resisting effect, heat resistance, frost resistance and good elongation; and the paint also has the advantages of wide application range, moderate price, environmental friendliness, durability and the like, and is convenient to use, thereby meeting the demand of people in a real life.

The invention relates to environmental protection paint, in particular to nano shell powder ecological functional flatly painted coating. The coating is prepared from shell powder (calcined), ash-calcium, kaolin, heavy calcium carbonate, hydrated magnesium silicate, titanium dioxide, vinyl acetate, hydroxyethyl cellulose, polyving akohol, polydimethylsiloxane, a water reducer and a defoamer. The coating solves the problem that indoor ornament or decoration paint is not environment-friendly. The coating has the characteristics that the coating is antifungal, purifies the air, prevents mildew, adopts a spiral pore structure, is 3.0mm in press coating thickness and high in glossiness, does not has obvious color aberration, is resistant to shock, abrasion, water, high and low temperature weather and aging, and ensures that the service life of a product reaches more than 20 years.

The invention relates to the technical field of composites and specifically relates to a graphene-like nano carbon nitride modified polytetrafluoroethylene friction material as well as a preparation method and application thereof. The graphene-like nano carbon nitride modified polytetrafluoroethylene friction material provided by the invention comprises the following preparation raw materials in parts by mass: 50-80 parts of polytetrafluoroethylene, 5-15 parts of polyimide, 5-10 parts of polybenzoate, 5-20 parts of aramid pulp, 5-15 parts of potassium titanate whiskers and 0.5-1.3 parts of graphene-like nano carbon nitride. The graphene-like nano carbon nitride modified polytetrafluoroethylene friction material prepared by adopting the raw materials with the proportions also has relativelylow mass wear rate and relatively high conversion efficiency on the basis of stable friction coefficient and is capable of meeting the demand for the friction material in an ultrasonic motor.

The invention provides a preparation method of a thermal insulation coating high-performance polyurethane elastomer. After the reaction of terminal hydroxyl polybutadiene liquid rubber and polyisocyanate, polyurethane is added for reaction for 3 to 4.5 hours at 85 to 90 DEG C to produce isocyanate-terminated prepolymer; a certain amount of heat insulating filler is added in the prepolymer and is mixed evenly to produce component A; chain extender, antioxidant, curing agent and solvent are mixed evenly according to a certain portion to produce component B; the component A and the component B with the weight portion of 3: 1 to 6: 1 are mixed, stirred evenly, cured at room temperature to produce the thermal insulation coating high-performance polyurethane elastomer. The process of the invention used to synthesize the thermal insulation coating high-performance polyurethane elastomer is more reasonable, the product has higher quality and better comprehensive properties. The test date shows that the tensile strength is 3.50 to 5.80MPa, the elongation at break is more than 220 percent, the bond strength is more than 10.0MPa, the glass transition temperature is less than 60 DEG C below zero, the solidification shrinkage rate is less than 0.1 percent. The product is mainly applicable to aerospace industry.

The invention relates to a data acquisition and communication system suitable for a small satellite controller local area network. The system comprises a power management module, a central control unit, a bidirectional bus transceiver, a control area network (CAN) bus controller and a CAN bus transceiver, and further comprises an analog/digital (A/D) acquisition module and an input interface filter circuit, wherein the power management module is used for supplying power to the whole system; the central control unit is used for controlling the bidirectional bus transceiver, the CAN bus controller and the A/D acquisition module; the bidirectional bus transceiver is used for performing chip level conversion; the CAN bus controller supports CAN bus technical regulations; the CAN bus transceiver is directly and electrically connected with a physical bus; the CAN bus controller and the CAN bus transceiver realize data communication through two data transceiving wires; the A/D acquisition module is used for acquiring analog data, converting the analog data into digital data and inputting the digital data to the central control unit; and the input interface filter circuit performs analog filtering. The A/D acquisition module is used for performing satellite analog acquisition to obviously extend a dynamic acquisition range and reduce energy consumption. The system has the advantages of the realization of the satellite digital and analog acquisition and communication, and high extendibility and reliability.

The invention relates to a preparation method of a Co3O4/PANI/MXene/PI electromagnetic shielding fabric. The preparation method comprises the steps: pretreating a PI fabric, and then carrying out plasma treatment; spraying MXene solution to the surface of the treated PI fabric for reaction; spraying Co3O4/PANI nanowire solution on the obtained MXene/PI composite for reaction; treating the obtainedCo3O4/PANI/MXene/PI composite in a PDMS (polydimethylsiloxane) solution. The preparation method is simple and has mild conditions, and the obtained electromagnetic shielding fabric has excellent conductivity and electromagnetic shielding performance.

The invention discloses a polyimide ultra-short fiber and a preparation method thereof and relates to the field of fiber preparation. According to the preparation method disclosed by the invention, batch preparation of polyimide fiber products with a fiber diameter nanoscale and a length micro scale can be realized. For the polyimide ultra-short fiber disclosed by the invention, the length of thefiber is 2 to 500mu m, the diameter of the fiber is 0.1 to 50mu m, and specific area is 2 to 30m<2>/g. By utilizing the physical and chemical properties at different heat treatment temperatures in thepreparation process of the polyimide fiber, dispersion and ultrashort properties of the fiber are realized more easily by adopting physical and mechanical methods in a state that the polyimide fiberis incompletely imidized; then complete imidization of the polyimide fiber is realized by high-temperature treatment; finally, the polyimide ultra-short fiber is obtained by a method of mechanical pulverization, lapping and shifting. The polyimide ultra-short fiber obtained by the preparation method disclosed by the invention has the characteristics of high and low temperature resistance, ultraviolet irradiation resistance, good insulating property and the like, and can be used for preparing a slurry coating solution, reinforcing resin, rubber and the like, forming pulp and the like.

The invention relates to a pole sealing device for a MH/Ni battery, comprising a pole (7). A nut (1), a disc gasket (2) coated by round structures in turn from top down, a ceramic gasket A (3), a sealing member (4), a pole sleeve (5), a ceramic gasket B (6) are coated on the surface of the pole (7). The pole (7), the ceramic gasket B (6) and the sealing member (4) are inserted into the pole sleeve (5) through the sealing member (4); the ceramic gasket A (3) is coated on the periphery of the pole sleeve (5), and fastened by the nut (1) and the disc gasket (2); the pole sleeve (5) is integrated with the battery shell by vacuum electron-beam welding. The invention settles the problem of pole sealing of MH/Ni batteries, and has the advantages of simple process, easy assembly, low cost and sound sealing performance, etc.

The invention discloses a novel thermal insulation material, and the composition comprises expanded perlite, cement, gypsum powder, fibers, redispersible rubber powder, casein glue, and the like. The thermal insulation material has the advantages of high strength, aging resistance, excellent thermal insulation effect, energy conservation, environmental protection, fire protection, sound insulation, low cost, convenient use, and the like. The novel thermal insulation material can be directly applied on buildings, containers, pipelines, reactors, household appliances and the like through a plurality of construction methods, thereby achieving the effects of thermal insulation and energy conservation.

The invention relates to an organic silicon rubber for LED packaging. In order to solve the problems that during direct physical blending of POSS (polyhedral oligomeric silsesquioxane) with vinyl silicone oil and hydrogen containing silicone oil, POSS has poor compatibility with vinyl silicone oil and hydrogen containing silicone oil and is very easy to precipitate, so that the light transmittance and mechanical properties of the product can be affected, the invention provides a preparation method of a POSS skeleton containing vinyl silicone oil. The method includes: mixing POSS with one or two of dimethyl polysiloxane and methylphenyl polysiloxane at any proportion to obtain a mixture, in the presence of a catalyst, carrying out end-capping with a vinyl end-capping reagent, and performing a polymerization reaction to obtain the POSS skeleton containing vinyl silicone oil. The preparation method is simple. The invention also provides application of the POSS skeleton containing vinyl silicone oil in LED packaging materials.

The invention relates to an aqueous anticorrosive epoxy coating for steelworks. The coating is composed of a component A and a component B, a weight ratio of the component A to the component B is 100:30, the component A is composed of 50-65 parts of an aqueous epoxy resin, 5-13 parts of deionized water, 0.4-0.9 parts of a dispersant, 0.1-0.6 parts of an antifoaming agent, 0.3-0.6 parts of a wetting agent, 4-10 parts of ultrafine zinc phosphate, 5-12 parts of titanium ash, 9-22 parts of hollow glass bead, 6-12 parts of silicon micro-powder, 3-6 parts of precipitated barium sulfate, 0.3-0.6 parts of a thickening agent, 1.2-2.5 parts of a metal corrosion inhibitor, and 0.1-0.2 parts of an in-tank bactericide; and the component B is an aqueous epoxy hardener. The coating is a completely-aqueous environmentally-friendly coating, contains no chemical solvents, has better wear and corrosion medium resistances than like coatings after film solidification, and can effectively reduce the product cost.

The invention relates to hydrogen-based silicone resin containing a trifunctional group chain element and a preparation method thereof. The hydrogen-based silicone resin containing the trifunctional group chain element has the following structural general formula: (R12HSiO1/2) a (R2SiO3/2) b, wherein a is not less than 3 and is of an integer, b is not less than 1 and is of an integer, the relation between a and b meets the condition that b/a is not less than 0.33 and not more than 4, R1 is of alkyl with 1-3 carbon atoms, and R2 is of phenyl or alkyl with 1-3 carbon atoms. The preparation method sequentially comprises the following steps of: 1) mixing trifunctional alkoxy silane, tetra-alkyl-dihydro-disiloxane, an organic solvent and an acid catalyst; 2) adding water to perform hydrolysis on the trifunctional alkoxy silane; and 3) evaporating out byproducts so as to get the hydrogen-based silicone resin disclosed by the invention. The hydrogen-based silicone resin disclosed by the invention can be used for cross-linking and curing reaction of LED (light-emitting diode) packaging materials and other addition type polysiloxane, and has the characteristics of high curing speed and smooth appearance of the obtained product.

The invention discloses a method for preparing phenyl silicone resin with high-refractive index. The method orderly comprises the following steps of (1) by taking silicone-alcohol and alkoxy silane as monomers, carrying out polycondensation under effect of a solid catalyst; (2) filtering out the solid catalyst in obtained reaction liquid after polycondensation is finished, and removing low-boiling-point substance to the reaction liquid to obtain the phenyl silicone resin with high refractive index. Compared with the prior art, the method has the advantages that 1, the method is simple in reaction process condition, easy to control and convenient to industrialize; 2, no solvent is added in the preparation process; and the method is environment-friendly and free of pollution; 3, the reaction process does not need hydrolysis reaction; and the reaction time is short; 4, the catalyst can be directly filtered after the reaction is finished; neutralization is not needed; the catalyst is removed by washing; the process is simplified; and wastewater discharge is also reduced; and 5, the refractive index of the prepared phenyl silicone resin is between 1.56 and 1.60; and the phenyl silicone resin has excellent performances such as high refractive index, high light transmittance, radiation resistance and high and low temperature resistance.