30results about How to "Does not affect reactivity" patented technology

The invention discloses a preparation method of triblock polymers with suspension nanometer zero-valent irons. The preparation method comprises the steps of utilizing an atom transfer radical polymerization(ATRP) method to synthetize triblock polymers of poly(t-butyl methacrylate), polymethyl methacrylate and polrvinyl benzene, hydrolyzing the poly(t-butyl methacrylate) to prepare polymethacrylicacid using trifluoroacetic acid, and finally sulfonating the polrvinyl benzene to prepare polystyrolsulfon acid using sulfuric acid acetyl. The method improves the original three-step reaction into aone-step reaction in the synthetic process of the polymers, thereby reducing the operation steps, reducing the consumption of raw materials, improving reaction stability and improving the productivity of aimed compounds; and adding trifluoroacetic acid in a hydrolysis process, so that the hydrolysis process is thorough and the reactivity and the suspension property of products are improved. The experiment results show that the triblock polymers comprise functional groups in required target products, the molecular weight can reach about 100 thousand, and the stabilization time of suspension effects of nanometer zero-valent irons can reach more than two months.

The invention discloses ultraviolet cured wood paint and a preparation method thereof. The raw material formula of the ultraviolet cured wood paint comprises the following components in percentage by weight: 30 to 35 percent of modified unsaturated polyester resin, 10 to 20 percent of polyester acrylate, 10 to 15 percent of 1,6-hexanediol diacrylate, 5 to 10 percent oftrimethylolpropane propoxylate triacrylate, 3 to 5 percent of polyhydroxyethyl methacrylate, 0.2 to 0.6 percent of settling agent, 10 to 20 percent of transparent powder, 3 to 6 percent of talcpowder, 0.5 to 1.5 percent of photoinitiator 1, 3 to 5 percent of photoinitiator 2 and 0.2 to 0.6 percent of flatting agent. The ultraviolet cured wood paint can be used as a transparent base coat, is low in cost, simple in preparationmethod and environmentally-friendly, has high transparency, high film performance, high rubbing property and high leveling property, and can create huge economic and social benefit.

The invention discloses a preservation method of a loop-mediated isothermal amplification reaction reagent mixture. The preservation method realizes long-term preservation of the loop-mediated isothermal amplification reaction reagent mixture at normal temperature or room temperature by adopting the following steps: adding a specific drying protective agent in the loop-mediated isothermal amplification reaction reagent mixture; and then carrying out vacuum drying or quick air drying of the mixture at a temperature lower than 80 DEG C. The preservation method has the advantages of low cost, simple operation and stable persistent activity of dried loop-mediated isothermal amplification reaction reagent mixture at the normal temperature, and the like. Therefore, the preservation method can effectively promote the application of loop-mediated isothermal amplification technology in the fields of medical treatment, inspection and quarantine, and the like, as well as the popularization of loop-mediated isothermal amplification kits.

The invention discloses a hydrofining method. The method consists of: mixing diesel oil with hydrogen, introducing the mixed gas into a first reactor, leaving the mixed gas and a hydrofining catalyst to undergo a contact reaction under a low temperature and a high space velocity, with the catalyst taking metal Mo and Co as active components, and having an average pore size of 20-40 angstroms and a total acid amount of 0.2-1.0mmol / g; and leaving the effluent of a first reactor to enter a second reactor, letting the effluent and a hydrofining catalyst to undergo a contact reaction under a high temperature and a low space velocity, with the catalyst taking metal W and / or Mo and Ni as active components, and having an average pore size of 40-70 angstroms and a total acid amount of 1.0-3.0mmol / g. The method employs appropriate catalysts according to different reaction types, and is in favor of lowering the catalyst cost without influencing reaction activity. The method provided in the invention can be used for producing diesel oil with a sulfur content of less than 50 micrograms / g.

The invention discloses a preparation method and application of an immobilized binuclear rhodium metal complex catalyst. The immobilized binuclear rhodium metal complex catalyst is prepared from a metallic organic framework ZIF-8 which is formed by Zn<2+> and 2-methylimidazole and serves as a carrier as well as Rh[2](esp)[2] which is axially modified by the 2-methylimidazole and is distributed onthe carrier ZIF-8. The preparation method comprises the following steps: enabling a mixed system containing the Rh[2](esp)[2], the 2-methylimidazole and a solvent to be subjected to reaction under theroom temperature condition to form the Rh[2](esp)[2] axially modified by the 2-methylimidazole, and then, adding the Zn<2+> into the mixed system to be subjected to reaction at room temperature to obtain the immobilized binuclear rhodium metal complex catalyst. The 2-methylimidazole is adopted as an organic ligand for synthesizing the ZIF-8, is self-assembled with zinc ions to form the metallic framework of the ZIF-8, and is in axial coordination with the Rh[2](esp)[2]; and after coordination, not only the reaction activity of the Rh[2](esp)[2] is not affected, but the reaction selectively for catalytic synthesis of N-H propane compounds is improved, and the universality is realized.

The invention discloses a preparation method of triblock polymers with suspension nanometer zero-valent irons. The preparation method comprises the steps of utilizing an atom transfer radical polymerization(ATRP) method to synthetize triblock polymers of poly(t-butyl methacrylate), polymethyl methacrylate and polrvinyl benzene, hydrolyzing the poly(t-butyl methacrylate) to prepare polymethacrylic acid using trifluoroacetic acid, and finally sulfonating the polrvinyl benzene to prepare polystyrolsulfon acid using sulfuric acid acetyl. The method improves the original three-step reaction into a one-step reaction in the synthetic process of the polymers, thereby reducing the operation steps, reducing the consumption of raw materials, improving reaction stability and improving the productivity of aimed compounds; and adding trifluoroacetic acid in a hydrolysis process, so that the hydrolysis process is thorough and the reactivity and the suspension property of products are improved. The experiment results show that the triblock polymers comprise functional groups in required target products, the molecular weight can reach about 100 thousand, and the stabilization time of suspension effects of nanometer zero-valent irons can reach more than two months.

The invention discloses a modifying method of solid epoxy resin, and especially relates to a modifying method for reducing the viscosity of the solid epoxy resin. The method comprises the following steps: carrying out mixing melting on base resin and bisphenol A under an oxygen isolation condition to obtain a molten material, adding a catalyst and a compound additive containing a phenolic hydroxyl group, and reacting to obtain modified solid epoxy resin. The modifying method reduces the viscosity of the epoxy resin, and widens the viscosity range of the epoxy resin under a fixed epoxy equivalent condition in order to enlarge the application range of the epoxy resin.

The invention relates to citric acid triester modified polyether polyol and application thereof in polyurethane waterproof coating, and belongs to the technical field of high polymer materials. According to the citrate modified polyether polyol, the citric acid triester is introduced into a polyether polyol molecular side chain through a chemical bond, and the preparation method of the citrate modified polyether polyol comprises the following steps: firstly, citric acid and alcohol react to prepare the citric acid triester, and then dianhydride acylation is performed to prepare anhydride acylated citric acid triester; and then reactions with triglycidyl ether and epoxypropane are conducted to prepare the citric acid triester modified polyether polyol. The citric acid triester is located on a molecular side chain of the polyether polyol, the reaction activity of the polyether polyol is not affected, meanwhile, the polyurethane material is endowed with excellent strength and elasticity, and the branched citric acid triester enables the polyether polyol to have low viscosity and have a good wrapping effect on a filler. The citric acid triester modified polyether polyol prepared by the invention has potential and wide application value in the field of polyurethane materials.

The invention provides an RNA protective agent, a kit containing the protective agent, application and a preservation method of RNA. The protective agent contains a trehalose solution with a concentration of 0.27M-1M. The protective agent provided by the invention can achieve the effects of long preservation time, temperature insensitivity and wide range of use temperature, an extracellular RNA sample treated by the protective agent has no influence to cDNA synthesis, PCR reaction and enzyme activity in sequencing and bank building. The protective agent provided by the invention can efficiently solve the RNA degradation, pollution and other problems encountered during long-term preservation or use of exRNA, and especially has important significance for preservation, repeated use and long-distance transportation of extracellular microRNA.

The invention aims to provide a pressure-controlling deaggregating synthetic method for a lithium iron phosphate positive electrode material. The method is suitable for the lithium iron phosphate positive electrode material with certain strength, with a coating layer on the surface of the material, and with small primary grain diameters. The pressure-controlling deaggregating synthetic method performs the reaction, uniform mixing and coating of the materials in gradient through an ultrasonic microwave reaction kettle; and a uniform reaction and a controllable process of the approximate nanoscale raw materials are finally realized. The prepared battery material is relatively high in particle uniformity and consistency; meanwhile, the powder is small in particles; and therefore, the lithium iron phosphate material is higher in the conductivity and the ion diffusion rate, and the electroelectroless performance of the material is greatly improved.

The invention provides an underground cross-linking type resin plugging agent prepared from seawater and application thereof. The underground cross-linking type resin plugging agent includes 3 wt% to7 wt% of sulfonated resol phenolic prepolymer, 2wt% to 4wt% of curing agent, 0.1wt% to 0.3wt% of coagulant, and the balance water. The sulfonated resol phenolic prepolymer sulfonate functional groupsimpart good water solubility of an anionic polymer in brine, and a phenoxy ether bond structure ensures the crosslinked body coating and water retaining capability. The cross-linking type resin plugging agent can be prepared from the seawater or saline with a higher degree of mineralization, can selectively enter a deep part of a high-permeability formation by general injection to delay the polycondensation and curing to form a thermosetting and thermal inertia resin gel which retains water highly. Under high temperature and high humidity formation conditions, the underground cross-linking type resin plugging agent can withstand formation differential pressure, water flow thrust and suction force of near-well zone negative pressure operation on the plugging agent for a long term.

The invention relates to a continuous preparation process of nickel-based butadiene rubber and rare-earth-based butadiene rubber, comprising: continuously introducing butadiene oil and one of nickel-based catalysts and rare-earth-based catalysts into a polymerization reaction unit of a polymerization device for polymerization reaction to obtain nickel-based or rare-earth-based butadiene rubber glue, and then introduce the glue into the coagulation unit for coagulation to obtain nickel-based or rare-earth-based butadiene rubber, wherein butyl oil includes butadiene monomer and solvent, which contains The content of oxygen compounds is less than or equal to 20mg / kg, and the water value is less than or equal to 50ppm; Among them, when preparing nickel-based butadiene rubber, the introduction of rare earth catalysts is stopped, and butyl oil and nickel-based catalysts are introduced into the polymerization reaction unit; When using butadiene rubber, the introduction of nickel catalyst is stopped, and butyl oil and rare earth catalyst are introduced into the polymerization reaction unit. Therefore, the present invention can realize the flexible switching production of nickel-based butadiene rubber and rare-earth-based butadiene rubber on the same set of polymerization device without shutting down to clean the kettle.