64results about How to "Exothermic stable" patented technology

The invention relates to a room-temperature cured flexible epoxy adhesive and a preparation method thereof. The room-temperature cured flexible epoxy adhesive is characterized by being prepared from a component A epoxy resin and a component B epoxy curing agent; in a utilization process, the component A epoxy resin and the component B epoxy curing agent are selected at the weight ratio of the component A epoxy resin to the component B epoxy curing agent of (1.15 to 1.20) to 1; after the component A epoxy resin and the component B epoxy curing agent are sufficiently mixed, the room-temperature cured flexible epoxy adhesive is obtained, wherein the component A epoxy resin is prepared from the following components in parts by weight: 100.5 to 115 parts of epoxy resin, 0.5 to 20 parts of a reactive diluent and 0.5 to 20 parts of an epoxy accelerant; the component B epoxy curing agent is prepared from the following components in parts by weight: 5 to 15 parts of an alicyclic amines curing agent, 28 to 100 parts of a polyether amines curing agent, 10 to 80 parts of a curing accelerant and 0.5 to 2 parts of a bonding accelerant. The adhesive prepared by the method can be cured at room temperature, is high in bonding strength and good in low-temperature flexibility, and can be used for elastic bonding.

The invention provides a thermal storage type thermoelectric direct conversion device. Thermal conduction connection between a lithium and sulfur hexafluoride reactor and the hot junction of an alkali metal thermoelectric converter is kept excellent, a water tank is arranged outside the alkali metal thermoelectric converter, a heat insulating material is arranged between the alkali metal thermoelectric converter and the water tank, a circulating water pump is arranged in the water tank, a heat insulating layer is arranged between the lithium and sulfur hexafluoride reactor and the water tank, a capillary evaporator is an annular cavity and is sleeved on the cold junction of the alkali metal thermoelectric converter, the top of the capillary evaporator is provided with a small hole communicated with the water tank as a cooling water inlet, the inner surface of the capillary evaporator is coated with a layer of high water-absorption material, the lateral surface of the capillary evaporator is provided with a steam outlet hole and is connected with an output pipeline entering a return pipe, water vapor is condensed into water in the reflow pipe and the water flows back into the water tank through the water inlet of the water tank, and an electrode of the alkali metal thermoelectric converter extends out of the shell of a battery. The thermal storage type thermoelectric direct conversion device has the advantages of reasonable and compact design, large thermal storage density, stable heat release and high power, and is independent of the outside and can supply power for a long time.

The invention relates to the technical fields of smart home, internet of things, cloud platform and voice recognition, and specifically discloses an intelligent clothing identifying and mite killing wardrobe which comprises a wardrobe main body and a control host; an external camera, a microphone, a loudspeaker and a touch display screen are arranged outside the control host; a temperature and humidity sensing probe is arranged inside the wardrobe; a PTC heating plate is arranged at the inner bottom of the wardrobe main body; an inner circulating fan is arranged above the PTC heating plate; anexhaust fan used for communicating air inside the wardrobe with the air outside the wardrobe is arranged on the top of the wardrobe; single or multiple built-in cameras used for ensuring that a monitoring horizon covers a space contained in the wardrobe are arranged in the wardrobe; and the digital intelligent management and application of the clothing are realized through a program and an Internet. The wardrobe provided by the invention has the functions of intelligently identifying clothing and intelligently killing mites; on this basis, an intelligent virtual fitting function and an intelligent costume matching pushing function are realized through the internet and a cloud server, and various functions that the intelligent wardrobe can be connected, viewed and controlled through a mobile terminal are further realized.

The invention relates to a medium-temperature cured prepreg resin matrix for rapid molding and a preparation method of the medium-temperature cured prepreg resin matrix and mainly solves the technicalproblem of relatively low medium-and-low-temperature curing reaction speed of the existing medium-temperature cured prepreg resin matrix. The problem is solved by preferably selecting a curing system, epoxy resin and a toughening agent. The epoxy resin matrix provided by the invention can be cured within 3h at 80 DEG C, can be cured within 15min at 20 DEG C and can be stored at room temperature for more than one month, and the cured resin matrix is high in glass transition temperature and capable of meeting demands of industries such as sporting and leisure products, automobiles and yachts for rapid molding.

The invention relates to a preparation method for a high-performance room-temperature calcium-based composition phase-change energy storage material. The preparation method includes the following steps: (1) calcium chloride or hydrate of the calcium chloride is dissolved in water according to the molar ratio of 1:6, so that calcium chloride solution is prepared, and the calcium chloride solution is placed under the constant temperature of 30 DEG C to 40 DEG C for later use; (2) calcium bromide or hydrate of the calcium bromide is dissolved in water according to the molar ratio of 1:6, so that calcium bromide solution is prepared, and the calcium bromide solution is placed under the constant temperature of 30 DEG C to 40 DEG C for later use; (3) the calcium chloride solution and the calcium bromide solution are mixed according to a proportion to form mixed solution, and are constantly stirred, so that the calcium chloride solution and the calcium bromide solution are sufficiently and uniformly mixed into the form of fluid; (4) nucleating agent and functional additive are added into the mixed solution, and the prepared brine compound is filled into a container and packaged. The low-temperature phase-change material prepared by the invention has the advantages that: the price is low, the latent heat of phase change is 160J/g to 200J/g, the phase-change temperature is between 17 DEG C and 28 DEG C, repeated tests prove that the performance of the phase-change energy storage material is stable, and phase separation does not exist. The phase-change energy storage material can be widely applied to energy efficiency in buildings, heating and temperature regulation in interior decoration, solar energy utilization, energy efficiency in vegetable greenhouses and other aspects.

The invention relates to a composition and an application of a hydrogenation catalyst. The catalyst at least comprises nickel, zinc oxide, an auxiliary agent one, an auxiliary agent two, an auxiliary agent three, and an auxiliary agent four. The catalyst is mainly composed of nickel and zinc oxide. Nickel is in an oxidation state, a metal state, or a mixture of various valence states. Zero-valence nickel in the catalyst accounts for 50-98mol% of nickel in the catalyst. The auxiliary agent one is one or more selected from manganese oxide and molybdenum oxide. The auxiliary agent two is one or more selected from potassium hydroxide, magnesium oxide and calcium oxide. The auxiliary agent three is one or more selected from alumina or silicon oxide. The auxiliary agent four is one or more selected from graphite, talcum powder or stearate. With the catalyst, a yield of low-carbon hydrocarbon is low; hydrogen consumption is low; a heavy component yield is low; and product separation process is simplified. Reduction control of the catalyst is simple, and machine is easy to start.

The invention relates to an epoxy resin composition suitable for being adopted at low temperature. The composition comprises a polyfunctionality epoxy resin, biphenol A polyether epoxy resin, thermoplastic resin, a curing agent and an interfacial modification agent, wherein the composition is prepared from, by mass, 100 parts of polyfunctionality epoxy resin and biphenol A polyether epoxy resin, 20-40 parts of thermoplastic resin, 30-50 parts of the curing agent and 2-5 parts of the interfacial modification agent. The epoxy resin composition has the good manufacturability, the cured product has the advantage of being not likely to crack at low temperature, and the prepared carbon fiber composite material has the advantages of improving micro-crack resistance, being good in interface bonding force and the like, and is suitable for the fields of aircraft structural component manufacutirng, fuel storage tank and other military low temperature wind tunnels.

The invention discloses a phase change heat storage material, which consists of a main material barium hydroxide and an additive barium chloride, wherein the main material and the additive play a role in preventing overcooling and preventing phase separation. A preparation method of the material comprises the following steps: (1) heating and melting pure barium hydroxide; (2) adding the additive barium chloride, and fully mixing the mixture evenly into a fluid substance; and (3) filling the mixture into a container to perform packaging. The phase change heat storage material has the advantages of large phase change latent heat, stable heat release process, fewer additive types, simple preparation method and convenient production; besides, the phase change heat storage material is easy forpackaging after being melted into the state of an even fluid substance.

The invention relates to a kind of polyvinyl-chlorid blend with impact modification. The invention mainly solves the problem that bad compatibility and bad binding force of nucleus and shell cause the bad impact property of polyvinyl-chlorid blend with impact modification in modifying polyvinyl-chlorid with putamen material by previous technology. In the invention, use acrylic acid carbalkoxy polymer and acrylic acid carbalkoxy-methyl methacrylate copolymer compatiblizing agent as nucleus, use methyl methacrylate as shell, and nucleus-shell are connected with compatiblizing agent. The invention can solve the problems mentioned above through the technical proposal of impact modification polyvinyl-chlorid with acrylate putamen polymer described above, and it can be used in industrial production.

The invention relates to a production method of an acrylic ester copolymer emulsion, in particular to a production method of a high-solid-content ultra-high-molecular-weight acrylic ester copolymer emulsion. According to the production method, an emulgator, a wetting agent, an emulsification dispersing agent, a pH conditioning agent and an oxidation-reduction initiator system are introduced into acrylic ester mixed monomer emulsion polymerization, by adopting one-time feeding, the oxidation-reduction system and an ultra-low temperature emulsion polymerization technology, an acrylic ester copolymer with high solid content (50-55%) and ultra-high molecular weight (the Mw range is 9.5 million-10.50 million, and the intrinsic viscosity eta range is 16-20) is prepared, a traditional old technology for producing a foaming conditioning agent is successfully replaced, and the adverse factors are overcome that the traditional foaming conditioning agent is generally low in molecular weight, widein distribution range, poor in flowability and low in melt strength, and the density of the finished product is difficultly lowered. The prepared emulsion is high in solid content, spray drying is easily achieved, the product moisture is easy to control, the energy is saved, and the consumption is lowered.

The invention relates to a dual-component solvent-free epoxy damping adhesive for marine use and a preparation method thereof. The preparation method comprises the following steps: (1) preparing a component A: uniformly mixing epoxy resin, modified polyether amine and an active diluent while stirring, adding a defoaming agent, a dispersant and a coupling agent, further uniformly mixing while stirring, adding a flame retardant, stirring for 10 minutes, and milling twice with a three-roller mill to obtain the A component; (2) preparing a component B: uniformly stirring an epoxy curing agent, polyether amine and an accelerator to obtain the component B; and (3) preparing a coating: uniformly mixing the component A obtained in the step (1) and the component B obtained in the step (2) at a weight ratio of 100: (10-30) to obtain the product, wherein the modified polyether amine is obtained by reacting bisepoxyl epoxy resin and polyether amine. Compared with the prior art, dual-component solvent-free epoxy damping adhesive has the advantages of long pot life, stable heat release, good flame retardancy, no VOC (Volatile Organic Compounds) and good adhesion, is convenient to construct and is cured at room temperature; the material has high loss factor at room temperature and is corrosion-resistant and vibration-proof.

The invention discloses a cleaning protective agent for a porcelain bottle of a transformer substation and a preparation method thereof. The cleaning protective agent for the porcelain bottle of the transformer substation comprises the following components in parts by mass: 4-10 parts of fluorosilicone polymer, 90-95 parts of thinner and 0.01-0.04 part of curing agent, wherein the fluorosilicone polymer comprises the following components in parts by mass: 50-80 parts of ethyl acetate, 10-25 parts of prefluor-4-methyl-2-amylene, 5-20 parts of methyl methylacrylate, 2-15 parts of silane coupling agent and 0.1-0.6 part of azodiisobutyronitrile. The preparation method comprises the following steps of: adding the ethyl acetate, the azodiisobutyronitrile, the ethyl methylacrylate, the silane coupling agent and the prefluor-4-methyl-2-amylene to a reaction kettle, refluxing, reacting, cooling to obtain the fluorosilicone polymer, adding the prepared fluorosilicone polymer, the thinner and the curing agent to a stirrer in sequence, and uniformly stirring to obtain the cleaning protective agent for the porcelain bottle of the transformer substation. The preparation method has the advantages of low cost, convenience in operation and high efficiency.

The invention discloses components of a phase-change thermal storage material and a preparation method of the phase-change thermal storage material. The phase-change thermal storage material consists of semi-refined No.58 industrial paraffin as a main material, and dodecanoic acid (lauric acid) as an additive. The preparation process comprises the following steps that: the semi-refined No.58 industrial paraffin is melted by heating at a temperature of 56 DEG C to 68 DEG C, and the dodecanoic acid (lauric acid) as the additive is added after the paraffin is completely melted, and is uniformly stirred; a mixture is re-heated to raise the temperature in the stirring process, so that the mixture is fully and uniformly stirred into a fluid shape; and finally, the fluid-like product is poured into a container to be encapsulated. The low-temperature phase-change thermal storage material provided by the invention has the advantages that the phase-change latent heat is high, the phase-change temperature is between 54 DEG C and 57 DEG C, as proved by repeated tests, the performance is stable, and the phase separation phenomenon cannot occur, and the like.

A high-toughness double-component epoxy structural adhesive comprises a component A and a component B which are mutually independent, the component A comprises 30-70 wt% of epoxy resin, 10-20 wt% of an active diluent, 0-15 wt% of an active toughening agent, 10-30 wt% of a filler and 1-5 wt% of an auxiliary agent, and the component B comprises 60-90 wt% of a curing agent, 3-10 wt% of an active toughening agent, 1-5 wt% of a coupling agent, 1-8 wt% of an auxiliary agent and 10-20 wt% of a filler. The component A and the component B are mixed according to the volume ratio of 1: (0.8-1.2) to obtain the high-toughness double-component epoxy structural adhesive. The component A and the component B of the structural adhesive are long in independent storage period, after the component A and the component B are mixed, the curing rate is low, heat release is stable, volume shrinkage is small, formed colloid defects are few, the epoxy structural adhesive obtained through mixing is quite excellent in toughness, T peel strength, impact peel strength and lap joint shear strength for metal bonding, and after curing, a sea island structure is formed, so that the structural adhesive has excellent impact resistance.

The invention belongs to the field of thickeners, and discloses a copolymer thickener. The copolymer thickener is a poly(alpha,beta-unsaturated carboxylic acid/N-alkyl acrylamide/N-vinyl pyrrolidone) crosslinking copolymer; the mass ratio of N-alkyl acrylamide to alpha,beta-unsaturated carboxylic acid to N-vinyl pyrrolidone is (3 to 18):(65 to 87):(4 to 25). The copolymer thickener has the advantages that the copolymer thickener is easily dispersed into water; a hydrogel has proper elasticity and ductility, the sticking is easy, and the skin smoothness and tightness effects are both realized. The invention also provides a preparation method of the thickener.

The invention relates to a stearic acid-based high-performance medium-temperature phase change energy storage material, which comprises the following raw materials by weight: 39-95% of pure stearic acid; and 5-61% of an additive. The preparation method comprises the following steps of: (1) mixing the pure stearic acid with the additive, and melting the mixture completely under a temperature condition of lower than or equal to 80DEG C; (2) carrying out stirring and mixing the materials fully and uniformly; and (3) performing packaging. The medium-temperature phase change energy storage material provided in the invention has the advantages of abundant raw materials, simple preparation, as well as great phase change latent heat (160J/g-220J/g), and can be applied to temperature regulation and thermal energy storage in a temperature range of 30-70DEG C, and especially has broad application prospects in daily necessity heat preservation, water heater energy storage, temperature control and regulation of electrical equipment and other aspects.