38results about How to "Meet preparation" patented technology

The invention discloses high temperature-resistant heat-bonding enamelled wire paint and a preparation method thereof. The high temperature-resistant heat-bonding enamelled wire paint consists of patient base resin such as modified co-polymerized nylon and phenolic resin, mixing dissolvent and assistant. The high temperature-resistant heat-bonding enamelled wire paint meets the requirement of heat-resistant condition more than 180 DEG C, the appearance of the finished product is brown thick liquid, the weight solid part is 18-28%, and the rotating viscosity is 800-2000mPa.s at 25 DEG C. The patient is used for the outer layer of a high temperature-resistant coil wire material, and can be solidified with polyesterimide base paint at the same furnace temperature.

The invention relates to a cephalosporin ester drug particle in a non-gel state after meeting water, and a preparation method and an application of the drug particle, and belongs to the technical field of pharmaceutical preparations. The drug particle comprises the following raw and auxiliary materials: a cephalosporin ester drug with the bulk density of 0.1-0.3g/ml, and the following auxiliary materials accounting for the mass percentage of the cephalosporin ester drug as follows: 2-4.5% of micropowder silica gel, 2-4.5% of anti-gel adjuvant, and 12-16% of disintegrating agent, wherein the anti-gel adjuvant is a glidant and/or a lubricant with the bulk density greater than 0.50g/ml. According to the cephalosporin ester drug particle in the non-gel state after meeting the water, and the preparation method and the application of the drug particle, the problem that the dissolution rate is relatively low due to the fact that gelatinization is severe when the cephalosporin ester drug is dissolved out in the water in the prior art is solved, the dispersity and the hydrophilicity in a dissolution-out process are good, no gelatinization exists, and the dissolution rate is increased greatly.

The invention provides a process for making powder through a stainless steel waste corner sheet metal. The powder is prepared by using an atomization method. The process comprises the following stepsthat S1, raw materials are sorted and graded; S2, cleaning and dewatering are conducted; S3, the technology ratio is formulated, smelting is conducted, and ingredients are added; S4, atomization for powder making is conducted; S5, dewatering and drying are conducted; and S6, screening and detection are conducted. The process has the beneficial effects that stainless steel edge corner waste materials are recycled, waste of the materials is reduced, the using ratio of stainless steel edge corner waste materials is increased, the metal powder is prepared by using the stainless steel waste cornersheet metal, so that the processing cost is low, and the raw materials are sufficient; and the metal powder is prepared by using the atomization method, so that the production efficiency is high, mostmetal and metal alloy powder thereof can be prepared, the metal powder quality is controllable, and using requirements of 3D printing and additive manufacturing are met.

The invention relates to a polymer, a chip and a preparation method and application thereof. The polymer comprises a repeating unit A and a repeating unit B with specific structural characteristics. The biochip can load biological components with higher density, meets the requirements of continuously developing biomolecule preparation and/or analysis, and is good in stability.

The invention provides a preparation method of amlodipine besylate degradant impurities. The method comprises the following steps: a) preparation of a compound 1: generating corresponding imine, namely, the compound 1 by using an acetylacetic ester compound SM1 as a raw material and using lower alcohol as a solvent under the condition of an ammonia source; b) preparation of a compound 2: performing a Hantzsch reaction on a compound SM2, the compound 1 and o-chlorobenzaldehyde SM3 as raw materials, so as to obtain the compound 2; c) preparation of a compound 3: removing R-base protection from the compound 2, so as to obtain the compound 3; d) preparation of a compound TM: removing R' from the compound 3, so as to obtain the compound TM. The invention provides a synthesis method of the amlodipine besylate degradant impurities and provides the preparation method of a reference substance for the study on the quality of amlodipine besylate, so that the important guiding significance is provided for safe medication of the amlodipine besylate.

The invention discloses a linkage type liquefiable sandy soil triaxial sample in-situ solidification sample preparation instrument. The instrument comprises a No.1 slurry storage box, a No.1 peristaltic pump, a No.1 grouting pipe, a No.2 slurry storage box, a No.2 peristaltic pump, a No.2 grouting pipe, a No.1 rubber plug, a sand sample compaction cylinder, a compaction cylinder pipe hoop, a composite plug, a percolate outlet pipe, a No.2 rubber plug, an organic glass dish, a No.3 rubber plug, a surplus slurry outlet pipe, a percolate collection dish and a surplus slurry collection dish. The linkage type liquefiable sandy soil triaxial sample in-situ solidification sample preparation method comprises the steps that sandy soil with the soil particle size ranging from 0.075 mm to 4 mm is putinto all sand sample compaction cylinders, a cylindrical sample with the set diameter range and the adjustable height range is formed after layered compaction, grouting is conducted through the peristaltic pumps according to related requirements, and therefore, a solidified sandy soil cylindrical sample meeting the standard requirements is obtained. The solidification effect and integrity of theprepared sample are improved, the sample preparation efficiency is improved, the sample preparation precision is improved, and the application range is widened.

The invention discloses a preparation method of a MoNiB metal ceramic thread element. The preparation method comprises the following steps that Mo-Ni-B metal mixed powder is prepared; a steel tubular core rod is machined; a metal mold is prepared; the steel tubular core rod is placed in the mold, and the space among a outer mold, a core mold and a lower mold is filled with the Mo-Ni-B metal mixed powder; the metal mold filled with the powder is placed into a pressure chamber of press equipment, static pressure molding is performed, and demolding is performed to form a composite molding body with the steel core hollow round rod inside and the Mo-Ni-B metal mixed powder on the outer layer; the composite forming body is machined into a thread element blank; the blank is subjected to vacuum sintering, and a finished blank is obtained; and the finished blank is subjected to finish machining, and the steel-based MoNiB composite metal ceramic product thread element finished product is obtained. The MoNiB metal ceramic thread element has ultrahigh corrosion resistance and wear resistance at the same time.

The invention relates to the technical field of pressure sensor modules, and in particular, relates to a pressure sensor module which comprises a shell; an air inlet pipe is arranged on the right sideof the lower end of the shell, and a wire outlet pipe is arranged on the right side of the upper end of the shell; a first cavity, an installation cavity and a third cavity are sequentially formed inthe shell from bottom to top, the first cavity is communicated with the air inlet pipe through an airflow channel, the installation cavity is communicated with the wire outlet pipe through a wiring hole, and a sealing plug is arranged in the wire outlet pipe. Under the condition that the maximum deformation of a pressure chip is not changed, through the arrangement of a second cavity and the first cavity, the pressure chip deforms downwards in the reverse direction under the small pressure and deforms upwards in the forward direction under the large pressure, and the sensitivity and the measuring range of the pressure sensor module are improved in proportion under the condition of low cost.

The invention discloses a crack-containing rock material preparation test device and a use method. The crack-containing rock material preparation test device comprises a bottom plate, a static side plate and a movable side plate, the static side plate is fixed on the bottom plate, the side end of the static side plate is connected with one side of the triangular auxiliary baffle, and the other side of the triangular auxiliary baffle is fixed on the bottom plate; the movable side plate is movably arranged on the bottom plate, and a crack placement cavity is formed between the movable side plate and the static side plate; the static side plate and the movable side plate are provided with at least one group of crack placement structures; the fracture placement structure comprises at least one group of fracture structures, and the fracture structures are located in the fracture placement cavity; connecting pieces used for limiting displacement of the movable side plate in the horizontal direction are arranged at the connecting positions of the static side plate and the movable side plate. The triangular auxiliary baffle is provided with at least two adjusting bolts, and the adjusting bolts penetrate through the triangular auxiliary baffle and are in contact connection with the movable side plate. Compared with traditional rock-like modeling equipment, the modeling equipment has more flexible model size control capability, and is convenient to demould and simple to operate, and the modeling equipment is long in service life and wide in application range.

The invention relates to a method and a system for machining a micro-nano structure with an array anti-reflection function. According to the method and system, the problems that the efficiency is lowand the precision and consistency are poor in the anti-reflection micro-nano structure of a large-breadth transparent curved surface component achieved through laser single-point machining are solved.The method comprises the steps of determining the manufacturing focal depth h of each micro-nano structure; segmenting the surface of a to-be-machined curved surface part into a plurality of sub-regions; determining the number of machining light beams in the array machining light beams when each sub-region is machined; laser beam splitting shaping; and machining each sub-region in sequence, and machining an edge region. The system comprises a laser, and an SLM spatial light modulator, a Fresnel lens group, a scanning galvanometer and a field lens which are sequentially arranged in an emergentlight path of the laser. By utilizing the system and the method provided by the invention, the manufacturing efficiency of the array microstructure can be greatly improved.

The invention provides a preparation method of fosfluconazole. The method comprises the following steps: preparing fluconazole dichlorophosphate: under the protection of nitrogen, controlling the temperature to be-10 DEG C to 0 DEG C, slowly dropwise adding phosphorus oxychloride into a dichloromethane solution of triethylamine, maintaining the temperature to be-10 DEG C to 0 DEG C, performing stirring for 1 hour, slowly dropwise adding a dichloromethane solution of fluconazole, and monitoring the completion of the reaction by TLC; maintaining temperature between-10 DEG C and 0 DEG C, adding water and stirring for 30 minutes, adding inorganic base until the pH value of the water phase is at least 8; and performing standing stratification, separating out the fluconazole, wherein the organicphase contains the fluconazole dichlorophosphate, the fluconazole is prepared through the fluconazole-fluconazole dichlorophosphate-fluconazole dibenzyl phosphate-fosfluconazole ammonium salt-fosfluconazole process, the yield is increased, all intermediates are controllably prepared, the raw materials can be recycled, and raw material waste and organic waste pollution are reduced.

The invention discloses a metal-wrapped short fiber cloth forming device and a using method thereof. The metal-wrapped short fiber cloth forming device comprises a vapor deposition device; a fiber raw material penetrates through the vapor deposition device; the vapor deposition device is used for depositing a metal layer on the surface of the fiber raw material; the fiber deposited with the metal layer penetrates into a fiber cutting device; a discharge hole of the fiber cutting device and a discharge hole of a resin injecting device are connected with the inlet end of a mixing device; a magnetic field generating device is arranged on the outer side of the mixing device; the outlet end of the mixing device is connected with a feeding hole of a cloth rolling device; and the cloth rolling device is used for rolling and forming to obtain finished short fiber cloth. According to the invention, the metal layer is deposited on the surface of the fiber raw material, so that the fiber has the conductivity; the short fiber and the resin are mixed in the mixing device; the orientation distribution of the fiber in a cloth mixture is adjusted by utilizing a magnetic field, so that the fiber is distributed according to controllable orientation, and the performance requirements of the short fiber cloth under different working conditions are met; and the structure and the process are simple, and the production cost is relatively low.

The invention relates to a pharmaceutical composition, which comprises (+)-(4S)-11-succinyl oxyethyl-4-ethyl-4-hydroxy-1H pyran[3',4',6,7]indolizine[1,2-b]quinoline-3,14-(4H,12H)-dione or its pharmaceutically acceptable salt, a stabilizing agent and a pH conditioning agent, wherein the pH value is 6.0-7.2.