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142results about How to "With viscosity" patented technology

Electromagnetic shielding conductive coating and preparation method thereof

The invention provides an electromagnetic shielding conductive coating and a preparation method thereof. The electromagnetic shielding conductive coating comprises film-forming substances, conductive powder, thickening agents, coupling agents and curing agents. The mass ratio of the film-forming substances to the conductive powder to the thickening agents to the coupling agents to the curing agents is 5-20:50-75:5-30:0.7-4:6.5-15. Auxiliaries are added into the film-forming substances and stirred to be completely dissolved, the thickening agents are added into mixture, the coupling agents are then added into the mixture, the conductive powder is added into the mixture after stirring, and the curing agents are added into the mixture, so that the electromagnetic shielding conductive coating is obtained. By means of composition and proportioning for the conductive coating, the prepared coating is excellent in electric conductivity and resistant to acid, alkaline and oxidization. Besides, the resistivity of the conductive coating prepared by the preparation method is continuously reduced, and conductive high molecular polymer for the conductive powder in the conductive coating is well compatible with organic resin, so that air bubbles and needle holes in the coating can be decreased.
Owner:KUNMING UNIV OF SCI & TECH

Method for preparing low molecular weight fish peptide through Bacillus natto fermentation method

A method for preparing a low molecular weight fish peptide through a Bacillus natto fermentation method comprises the following steps: taking fish to mince, adding water, adding maltose, glucose, lactose or sucrose to obtain a mixture; adjusting the pH value of the mixture, sterilizing at high temperature; cooling, inoculating Bacillus natto seed liquor to ferment; and centrifuging fermentation liquor, filtering, concentrating, drying and grinding to obtain a low molecular weight fish peptide product. The method uses fish as the raw material and utilizes the Bacillus natto fermentation technology to obtain the low molecular weight fish peptide. The product in the invention is very soluble in water, is digested and absorbed easily by human body and has various functions of reducing cholesterol in the blood, promoting lipid metabolism, preventing and curing hypertension and the like. The technology in the invention is also suitable for other low value aquatic product and high-grade aquatic product machine leftover pieces, thus fish resources can be fully utilized; and the technology is simple and easy, the investment is less, the cost is low, the effect can be realized fast, the added value is high and the method is suitable for large-scale industrial production.
Owner:全然之心(大连)商贸有限公司

Industrial secondary refrigerant

The invention relates to an industrial secondary refrigerant. The industrial secondary refrigerant is composed of, by weight, 80 to 99% of glycol alkyl ether or propylene glycol alkyl ether compounds, 0.1 to 5% of a corrosion scale inhibitor and 0.9 to 10% function-adjusting liquid. According to the invention, the secondary refrigerant is added with the environment-friendly corrosion scale inhibitor which is harmless to the environment and human body, and the corrosion scale inhibitor can adsorb on metal surface and forms a physical adsorption protective film, so dissolved oxygen is blocked from diffusion to the metal surface; meanwhile, a compact passivation antirust film is generated through oxidation reduction reaction of the corrosion scale inhibitor with the metal surface, so metal oxidation is inhibited; moreover, the industrial secondary refrigerant provided by the invention also selects and uses the glycol alkyl ether or propylene glycol alkyl ether compounds with low viscosity, so effects of cold carrying and heat exchanging are guaranteed. The industrial secondary refrigerant in the invention is suitable for being used as the secondary refrigerant applied in industry under minus 80 to 200 DEG C, and an indirect heat transfer system in chemical industrial production and medicinal synthesis process. The secondary refrigerant is non-toxic and harmless, has excellent and safe heat transfer property and good fluidity at low temperature, does not precipitate and scale, and has the characteristics of environmental protection, cold carrying, heat transfer, corrosion inhibition, bacterial inhibition, low viscosity, corrosion resistance, etc.
Owner:CHAOYANG GUANGDA CHEM

Preparation method of nano silicon dioxide/ hydroxyl silane coupling agent composite modified polyurethane super-hydrophobic membrane

The invention discloses a preparation method of a nano-silica/hydroxysilane coupling agent composite modified polyurethane super-hydrophobic membrane. The nano-silica/hydroxysilane coupling agent composite modified polyurethane super-hydrophobic membrane is prepared from the following main raw materials: polyol, isocyanate, a catalyst, a hydrophilic chain extender, a neutralizer, a micromolecule chain extender, a silane coupling agent, nano-silica, deionized water and a post-chain extender. According to the invention, a synthesized polyurethane system is modified by introducing nano silicon dioxide particles modified by a hydroxyl silane coupling agent. A hydroxyl group of the hydroxyl silane coupling agent can chemically react with an isocyanate group of a waterborne polyurethane system, and silane is introduced to modify the hydrophobicity of the polyurethane membrane from the chemical aspect. The hydrophobicity of the polyurethane membrane is modified from the physical aspect by a micro-nano structure formed after the membrane is formed by the nano silicon dioxide particles treated by the hydroxyl silane coupling agent. The water contact angle of the prepared polyurethane super-hydrophobic membrane can reach 145-155 degrees, the rolling angle is 5-7 degrees, and the application field of the polyurethane membrane is widened.
Owner:CHANGCHUN UNIV OF TECH

Liquid-state pipeline dredging agent

The invention discloses a liquid-state pipeline dredging agent. The dredging agent comprises the following components in percent by mass: pypocholoride, 0.05-5 percent of alkali metal hydroxides, 0.01-5 percent of sodium silicate, 0.05-10 percent of alkyl amine oxide, 0.05-10 percent of alkyldiphenyloxide disulfonates, 0.05-5 percent of fatty-acid soap, 0.05-0.5 percent of essence and the balance of deionized water, wherein available chlorine in the pypocholoride accounts for 0.1-8 percent. The disclosed liquid-state pipeline dredging agent has a certain viscosity, the wall built-up performance of the dredging agent is improved, and the acting time of the dredging agent and the blocking substances is prolonged for the slightly blocked or incompletely blocked pipeline; the liquid-state pipeline dredging agent does not contain aluminum skimmings, percarbonate, carbonate and other gas production compounds, and the danger caused by heat and gases generated by the sharp reaction is avoided; the liquid-state pipeline dredging agent is simple in preparation process, has no influence on the personnel and environment and is low in cost, convenient to use, safe and high-efficiency; and the liquid-state pipeline dredging agent can serve as a hard surface cleaning agent or bactericide.
Owner:WALCH GUANGZHOU COMMODITY

Method for recycling epoxy chloropropane in epoxy chloropropane wastewater and treating wastewater

The invention relates to a method for recovering epichlorohydrin from epichlorohydrin wastewater and treating the wastewater. The method includes the following main steps: preparing a pretreatment solution, standing and stratifying the wastewater, adsorbing the wastewater by activated carbon, and treating the wastewater by a membrane module. The pretreatment solution is prepared by reacting sodium chloride and epichlorohydrin wastewater, and the activated carbon is prepared by reacting bamboo charcoal, oxalic acid urea, water, polyurethane resin, ethanol, and N,N-dimethylformamide. The advantage of the present invention is that the solubility of epichlorohydrin in the saturated aqueous sodium chloride solution is small, and separation and purification can be obtained by standing for stratification. It not only solves the problems of high recovery cost and high energy consumption of epichlorohydrin, but also solves the problem of up-to-standard discharge or even zero discharge of waste water. At the same time, the by-product sodium chloride is rationally used, which improves the economic benefits of the enterprise. The method is easy to operate, the activated carbon can be reused, the recovery rate of epichlorohydrin is high, and the waste water can reach the standard of reused water.
Owner:郑巧丹
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