45results about How to "Good stability at room temperature" patented technology

The present invention is directed to novel organometallic complexes as catalysts for the reaction of compounds with isocyanate and hydroxyl functional groups to form urethane and / or polyurethane and the process employing such catalysts. More particularly, the present invention is directed to novel complexes of zinc(II) with substituted amidines. These novel catalysts are useful for the production of urethanes and polyurethanes which are important in many industrial applications.

Disclosed is an aluminum alloy sheet resistant to deterioration through natural aging. The aluminum alloy sheet is an Al—Mg—Si aluminum alloy sheet containing 0.35 to 1.0 percent by mass of magnesium; 0.5 to 1.5 percent by mass of silicon; 0.01 to 1.0 percent by mass of manganese; and 0.001 to 1.0 percent by mass of copper, with the remainder being aluminum and inevitable impurities, in which the amount of dissolved silicon is 0.55 to 0.80 percent by mass, the amount of dissolved magnesium is 0.35 to 0.60 percent by mass, and the ratio of the former to the latter is 1.1 to 2. The aluminum alloy sheet may further contain 0.005 to 0.2 percent by mass of titanium with or without 0.0001 to 0.05 percent by mass of boron.

The invention provides a heat-resistant aluminum alloy die-casting demolding agent and a preparation method and an application method thereof. The heat-resistant aluminum alloy die-casting demolding agent is prepared from the following components in parts by weight: 20-30 parts of oxidized polyethylene wax, 10-20 parts of organic modified silicone oil, 5-15 parts of an anionic surfactant, 1-5 parts of a nonionic surfactant, 10-20 parts of volcanic ash, 1-5 parts of black corundum, 1-5 parts of triethanolamine and 20-50 parts of water. The heat-resistant aluminum alloy die-casting demolding agent provided by the invention is good in heat resistance, excellent in lubricating and demolding property and good in stability, and still has a good demolding property after thermal treatment within 400 DEG C. A demolded casting is high in smoothness and has very good room temperature placing stability.

This invention discloses a compositino of rare earth magnetic material of high working temperature and high thermo stabilizing with the general formula of Smx-oRo(Fe1-yMy)100-x-*N* in which, R1 is one or more one rare earth elements not including Sm, M is one or several in Nb, V, Ti, Co, Cr, Mo, Mn, Ni, Ca, Zr, Ta, Ag, Au, Al, Pb, Cu and Si, N is nitrogen, Sm is samarium, due to the exchange couple action of nm crystal retentive phase of Sm2R2-x(Re1-*M*)17Nbeta and soft magnetic phase of 2-Fe, the invented magnetic powers and adhesive magnts have high coercive force and high saturated magnetization intensity, especially the high coercive force.

The invention discloses a detecting method for immunosuppressive agents in dried blood spots, and further discloses a detecting kit for the immunosuppressive agents in the dried blood spots. The detecting method comprises the steps that the standard curve dried blood spots and the to-be-detected dried blood spots are mixed with an extracting solution and an internal standard solution correspondingly and then extracted, centrifuging is conducted, and supernate is taken; the supernate is blown dry and then redissolved through a redissolving solution, and detecting is conducted through a tandem mass spectrum method; according to the peak exceeding area specific value of standard samples to an internal standard object and the concentration of the standard samples, linear regression is conducted to obtain a standard curve equation of the immunosuppressive agents; the peak exceeding area specific value of to-be-detected samples to the internal standard object is substituted into the standardcurve equation, and the content of the immunosuppressive agents in the to-be-detected samples is calculated; the extracting solution is a water solution of methyl alcohol and / or acetonitrile; and theimmunosuppressive agents are one or more of cyclosporine A, tacrolimus, sirolimus and everolimus. The detecting method can effectively detect the four types of immunosuppressive agents simultaneously, and thus the detecting efficiency is improved.

The invention relates to a room-temperature-storage type acrylate underfill adhesive and a preparation method thereof. The underfill adhesive comprises, by weight, 50-70 parts of modified acrylate resin, 20-30 parts of acrylate monomer, 1.0-5.0 parts of initiator, 0.1-1.0 part of inhibitor, 0.1-5.0 parts of auxiliaries and 0-5.0 parts of pigment. The room-temperature-storage type acrylate underfill adhesive is low in system halogen content, safer and more environment friendly, low in guarant viscosity, good in wettability and high in reliability, fully meets requirements on production process and reliability of SMT (surface mount technology), has excellent stability at room temperature and can be stored and transported at room temperature without cold preservation, and transportation and use costs are greatly reduced.

The invention discloses an underfill which is flowable at room temperature and is rapidly solidified at a low temperature. The underfill is prepared from the following raw materials, by weight, 20-50 parts of a liquid epoxy resin, 5-20 parts of an active epoxy diluent, 0-60 parts of spherical silicon powder, 5-20 parts of a polyester or polyester polyol, 0.1-5 parts of a catalyst, 0.2-2 parts of a coupling agent, 0.1-2 parts of a pigment, and proper amounts of a defoaming agent and a flow assistant. The invention also discloses a preparation method of the underfill. The underfill flowable at room temperature and rapidly solidified at a low temperature, which is prepared according to the method of the invention, has the advantages of reasonable composition ratio, fast flow speed, low solidification temperature, short solidification time, easy reparation, and effective improvement of the technological efficiency of a production lien of electronic products.

The invention belongs to the technical field of medicines, and in particular relates to a new medicinal crystal form of dabigatran etexilate mesylate. Prepared dabigatran etexilate mesylate disclosed by the invention has the advantages that the chemical purity is 99.9%, the maximum impurity content is less than 0.1%, and the optical purity reaches 99.96%ee; and dabigatran etexilate mesylat is good in stability.

The invention discloses a method for improving the stability of copper ion ink and the conductivity of a copper film. The method comprises the following steps: dissolving a mixed ligand of anhydrous organic acid copper salt, alkylamine and hydramine in an anhydrous alcohol solvent, adding an alcohol-soluble binding agent to obtain a uniform and stable ink stock solution, adding a certain proportion of water prior to ink jet printing to prepare ink, printing the ink on a substrate in a ink jet printing manner, and performing heating and reduction in nitrogen to obtain the conductive copper film. The method adopts anhydrous organic acid copper salt and the anhydrous solvent and adjusts proportions of alkylamine and hydramine, so that the ink stock solution with good room temperature stability can be prepared, has no deterioration for at least three months, and is convenient to transport and store; an appropriate amount of water is added prior to the printing to prepare the ink to be printed into a pattern; the copper film with high conductivity can be obtained by the heating and the reduction in the nitrogen after drying; and the resistivity of the copper film obtained by the reduction at below 250 DEG C is only 3-10 times of that of bulk copper. The method is easy and simple to operate, and gives consideration to the room temperature stability of the ink and the high conductivity of the copper film.

The present invention provides a new chlorogenic acid composition. The chlorogenic acid composition has advantages of good stability at room temperature, high solubility, small reconstitution volume,more tolerable pH value of human body, etc., and is suitable for injection drug delivery system of subcutaneous / intramuscular administration. The preparation method can better meet safety during production, transportation and use processes and the more effective drug delivery system composition is provided for clinical application of chlorogenic acid.

The invention relates to a pouring sealant and a preparation method for the same. The pouring sealant consists of the following raw materials in percentage by weight: 30 to 60 percent of epoxy resin, 2 to 10 percent of a diluent, 0.5 to 5 percent of a silane coupling agent, 0.5 to 22 percent of a curing agent, 15 to 45 percent of compound silica micropowder and 0.5 percent of carbon black. The pouring sealant is high in flowing speed, antifoaming performance and adhesion and low in gap permeability, and is particularly applicable to the pouring of a complexly-structured component with a gap below which a circuit board is arranged, and the poured component is smooth in appearance and high in reliability.

The invention provides an epoxy resin-based mineral casting and a preparation method thereof. The mineral casting comprises 85-88 parts of aggregate, 7-9 parts of an adhesive, 4-5 parts of a filler and 1 part of an auxiliary agent, the total amount of all the components is 100 parts. The adhesive comprises epoxy resin and a curing agent. The preparation method comprises the following steps: (1) s1, preparing epoxy resin; s2, preparing the curing agent; (2) preparing aggregate particles; (3) sequentially adding a reinforcing agent and a filling material into a stirring device to obtain a mixture A; (4) weighing the s1 and the s2 according to the formula weight to obtain the adhesive; adding an adhesive into the mixture A to obtain a mixture B; (5) compacting the mixture B by high-frequency vibration to obtain a primary product; and (6) heating and curing the primary product, opening a mold and cooling to obtain a finished product. The compressive strength of the mineral casting reaches 160-180 MPa, and the elastic modulus of compression reaches 40-55 GPa; the preparation method is simple, easy to control and suitable for wide popularization and application.

A related low-temperature fast-curing impedance flame-retardant structural adhesive is composed of the following raw materials: 10 to 20 parts of self-synthesized flame-retardant epoxy resin gel, 25 to 35 parts of tricyclopentyl dimethoxy epoxy resin, 3 to 8 parts of a novel low-viscosity toughening agent, 20 to 30 parts of dipentaerythritol hexakis(3-mercaptopropionate), 4 to 6 parts of imidazoleadduct and 6 to 33 parts of ultrafine aluminum hydroxide. The structural adhesive prepared by the invention has the advantages of high low-temperature curing speed, easiness in single-component operation, good impedance performance, good flame retardance, low shrinkage, good bonding strength and the like, and is suitable for structural bonding of various micro motor inductance coils and associated difficult-to-bond materials.

The invention discloses a transfer factor powder spray and preparation process, which comprises the following constituents (by weight percent): transfer factor 0.5-50%, adhesive material 0-30%, filling agent 6.8-97.5%, phosphatides surface active agent 0-60%, amino acid 0-50% and absorption promoting agent 0-10%.

The invention belongs to the field of lithium batteries, and provides an aerogel flame-retardant microsphere for a high nickel ternary lithium battery electrolyte and a preparation method. The methodcomprises the steps that an aerogel flame-retardant microsphere inner layer material, namely, graphene oxide aerogel loaded nanometer magnesium hydroxide for the high nickel ternary lithium battery electrolyte is prepared; graphene oxide aqueous dispersion is atomized into a graphene oxide droplet microsphere through electrostatic spraying, distribution of graphene oxide in the microsphere body ofthe graphene oxide droplet microsphere formed through electrostatic spraying is extremely uniform, collection is conducted in an organic mixture, and a good sphere is obtained. By means of an ordinary spraying or fluidized bed, an aluminum hydroxide colloid is stuck to the surface of the microsphere and dried, and the aerogel flame-retardant microsphere for the high nickel ternary lithium batteryelectrolyte is obtained. The microsphere has the good normal temperature stability and high temperature sustainable flame retardance. In addition, at high temperature or in the burning process, graphene oxide aerogel makes contact with the electrolyte to form a circuit, the electrode internal resistance is increased, and the electrode voltage is lowered.

The invention relates to a preparation method of a lead-free halogen micron crystal as well as a product and application of the lead-free halogen micron crystal, and belongs to the technical field of preparation of the lead-free halogen micron crystal. The invention discloses a preparation method of a lead-free halogen micron crystal, which comprises the following steps: dissolving silver chloride (AgCl) and rubidium chloride (RbCl) in dimethyl sulfoxide, and extracting by an anti-solvent method to obtain the Rb2AgCl3 lead-free halogen micron crystal. The Rb2AgCl3 lead-free halogen microcrystal is prepared by using a normal temperature method and has the advantages of simple experimental steps and easiness in operation, compared with lead-containing halide, the prepared Rb2AgCl3 lead-free halogen microcrystal solves the problem of toxicity of lead, and particularly compared with cesium-lead-bromine, the luminous quantity of the Rb2AgCl3 lead-free halogen microcrystal prepared by the method is higher than that of cesium-lead-bromine under X rays when the Rb2AgCl3 lead-free halogen microcrystal is used as a scintillator material, and the service life of the Rb2AgCl3 lead-free halogen microcrystal is prolonged. And the process for preparing the micron crystal powder into the film is simple, and after the film is prepared, materials in the film are uniformly distributed, so that the imaging effect is better.

The invention relates to a sorafenib 2-aminopyrimidine eutectic A and a preparation method thereof. The crystal form preparation process is simple, improvement of the batch reproducibility is facilitated, and the stability of the crystal form in a raw material or preparation preparing process is ensured. Moreover, the sorafenib 2-aminopyrimidine eutectic A provided by the invention is excellent inroom temperature stability and convenient for long-term storage and transport, and the medicine quality and medication safety are ensured.

The invention relates to the technical field of waste drilling fluid treatment, in particular to a method for preparing a gel breaker for treating a waste drilling fluid. The preparation method is smooth in flow path, preparation parameters are easy to control, the pollution is relatively low and the yield is relatively high. The preparation method comprises the following steps: adding water glass into a reaction container, stirring by using water, adding hydrochloric acid to adjust the PH value, and allowing standing still for reacting; performing nitrogen protection, adding starch, and heating for reacting; adding carboxymethyl cellulose and a free radical initiator, and standing for reacting; performing recrystallizing suction filtration by using isopropanol; washing by using anhydrous ethanol and glacial acetic acid, drying and the like.

The present invention addresses the problem of providing: a liquid crystal composition having a liquid crystal phase in a wide temperature range, high [delta] n (refractive index anisotropy), and good normal temperature stability; and a liquid crystal display element, a sensor, a liquid crystal lens, an optical communication device, and an antenna using the same. A liquid crystal composition comprising one or more compounds represented by general formula (ii) having an isothiocyanate group (-NCS), the liquid crystal composition being obtained by using one or more compounds represented by general formula (i) having an indane structure or a tetrahydronaphthalene structure and an isothiocyanate group (-NCS) in combination with one or more compounds represented by general formula (i), the liquid crystal composition comprising one or more compounds represented by general formula (ii) having an isothiocyanate group (-NCS).

The invention provides a nasal spray containing human urinary kallidinogenase and a preparation method thereof. The nasal spray contains a pharmaceutical active ingredient human urinary kallidinogenase, a buffering agent, a pH regulator, an osmotic pressure regulator, a protease protective agent and an absorption promoter, wherein the buffering agent is selected from a disodium hydrogen phosphate-sodium dihydrogen phosphate buffering system; the pH value of the nasal spray is 6.0-7.0; the pH regulator of the nasal spray is selected from hydrochloric acid and sodium hydroxide; the osmotic pressure regulator is selected from sodium chloride; and the protease protective agent is selected from one or more of hydrolyzed gelatin or albumin; and the absorption promoter is selected from chitosan. The nasal spray is non-toxic and non-allergic to nasal mucosa, is easily absorbed by the nasal mucosa, has good stability, can remarkably improve the cerebral infarction condition, can be carried about, and is convenient for subsequent treatment of cerebral infarction patients.