226results about How to "There are few types of use" patented technology

The invention related to a polyimide film with high visible light permeability, molecular structure formula of which is: (shown in figure). Preparation comprises steps of: dissolving primary diamine in a strongly polarnon-proton solvent, cooling the same by cold water to 5 DEG. C to 10 DEG. C, adding aromatic dianhydride, mixing, reacting 4h to 10h at 5 DEG. C to 10 DEG. C, acquiring homogeneous, transparent, sticky polyamic acid resin solution; wherein mol number of aromatic dianhydride is equal to that of primary diamine; adjusting viscosity of polyamic acid resin solution by N,N-dimethyl acetamide, forming film in a casting machine, heating to raise temperature, processing dehydration heat imidization, cooling, deciduating to acquire homogeneous and transparent polyimide thin film. The preparation method has mild reaction condition, sample to operate, low in cost and environmental friendly; mechanical property and thermal stability of the polyimide thin film are excellent with high visible light permeability reaching 94% and film thickness 50 micrometers.

The invention discloses a method for making 1, 4-double (2,4-diamino phenoxy) phenyl type self-toughening unsaturated polyimide powder. The method mainly comprises the following steps that: 1) 1, 4-double (2,4-diamino phenoxy) phenyl, aromatic series binary primary amine and aromatic series binary anhydride as well as an organic compound containing unsaturated double bond are stirred and react in a strong polar aprotic organic solvent system at a temperature of between 20 and 140 DEG C to obtain a brown and ropy thermoset polyamide acid solution capable of cross bonding and curing; 2) the obtained polyamide acid solution is dehydrated, mild-aminated, powdered, filtered, washed and dried to obtain the 1,4-double (2,4-diamino phenoxy) phenyl type self- toughening unsaturated polyimide powder.

The invention discloses a dabigatran compound and a preparation method and a medicinal composition thereof. The dabigatran compound is mesylate-hydrate of 3-[(2-{[4-(carbethoxyl amino-imino-methyl)-phenyl amino]-methyl}-1-methyl-1H-benzimidazole-5-carbonyl)-pyridine-2-radical-amino-ethyl propionate. The invention further relates to a preparation method of the compound and a medicinal composition taking the compound as an active ingredient. Compared with dabigatran mesylate, the compound has higher stability and is more suitable for preparing, storing and using medicinal preparations of various forms.

The invention discloses a high-efficient water-based well drilling fluid with fast absorption, strong inhibition and low damage, which comprises the following components: 100 parts of seawater or fresh water, 2-5 parts of inorganic salt, 0.2-0.8 part of coating inhibitor, 1.5-3.5 parts of fluid loss additive, 2-4 parts of strong inhibitor, 2-4 parts of lubricant, 0.1-0.5 part of shear strength improving agent and 30-150 parts of weighting agent. The well drilling fluid has strong inhibition and has good rheological property and stable system performance during the whole well drilling process,even a large quantity of highly easily hydrated and dispersed cuttings exist for invasion of sewage, the viscosity of the well drilling fluid is basically controlled to be about 50s.

The invention relates to a fluorine-containing imine matrix resin used for advanced composite material, which comprises the following components: 1wt%-15wt% of fluorine-containing polyimide low polymer powder, 5wt%-20wt% of fluorine-containing active polyimide powder, 60wt%-70wt% of multifunctional epoxy resin and 5wt%-20wt% of curing agent; the preparation method comprises the steps of feeding fluorine-containing diamine monomer, fluorine-free diamine monomer and strong-polar aprotic organic solvent, adding aromatic dianhydride solid powder, stirring and reacting at room temperature, adding a dehydrating agent and a catalyst, heating and reacting for 3 hours, adding a precipitant to precipitate out solid powder, cooling to room temperature, filtering, washing and drying, thus obtaining the fluorine-containing polyimide low polymer powder; preparing the fluorine-containing active polyimide powder in a same way; leading the two materials and the multifunctional epoxy resin to conduct bulk polymerization reaction, and then adding the curing agent after dissolution. The method has simple process, low cost and environmental protection effect, can finish the preparation process in standard equipment, and is applicable to industrial production.

The invention relates to a preparation method of 2, 2-bis-[3-amino-4-(2, 4-dinitrophenoxy) phenyl] hexafluoropropane, comprising: (1) heating to reflux and segregate water for 6-18h to treat 2, 2-bis-(3-amino-4-hydroxy phenyl and 2, 4-dinitro halogenated benzene at a mol ratio of 1.0:2.0 to 2.2, in a system of salt forming agent and organic solvent, (2) concentrating reaction liquid, cooling the reactant system, adding water, precipitating solid product, filtering, washing and drying to obtain 2, 2-bis-[3-amino-4-(2, 4-dinitrophenoxy) phenyl] hexafluoropropane crystal. The preparation method of 2, 2-bis-[3-amino-4-(2, 4-dinitrophenoxy) phenyl] hexafluoropropane has simple operation, high yield and purity, wherein the solvent can be recovered easily and repeatedly used. The invention has low generation of three wastes and environment-friendly property, which is suitable for industrial production.

The invention belongs to the technical field of agricultural pharmacology and discloses a wheat field weeding composition and a medicine preparation thereof. The wheat field weeding composition is composed of a component 1 and a component 2, wherein the component 1 is halauxifen-methyl and the component 2 is selected from flucarbazone, mesosulfuron, fenoxaprop-P-ethyl, clodinafop-propargyl, pinoxaden or isoproturon. In the wheat field weeding composition, the two components are compounded with each other so that a synergistic effect is achieved. Medicine effects are significantly improved. The wheat field weeding composition can effectively prevent and treat weeds in a wheat field and can be widely applied in the field of agriculture.

The invention relates to a polyimide coating with high-temperature resistance and a preparation method thereof. The polyimide coating is prepared from the following raw materials: a reactable polyimide resin solution, N,N,N',N'-tetraglycidyl-4,4'-diamino-3,3'-dimethyl diphenylmethane, dicyandiamide, nanoscale inorganic powder and an organic solvent. The preparation method comprises the following steps: mixing the first four components, heating the mixture to 80 DEG C, stirring to react for 0.5-1 hour, adding the organic solvent and uniformly stirring to obtain the polyimide coating. In the invention, the raw material resin has easily controlled molecular weight and easily adjusted molecular structure, thus favoring the preparation of the high-temperature-resistant polyimide coating with ideal performance; the preparation method has moderate reaction conditions, is performed under normal pressure and is simple to operate; and the preparation method has convenient raw material sources and low cost and is suitable for industrial production.

The invention provides a fan control method based on the NUMA computer system structure. In computer systems using an FPGA device, such as physical layer multi-partition computers, an NIOS II soft core is established in the FPGA to monitor server system temperature and control and manage operation of a fan cooling system. A custom PWM module IP core is further provided. The functions such as temperature function, a PWM fan control module, a fan speed detection module, DDR2 SDRAM storage control and Flash storage control are integrated in the NIOS II soft core of the FPGA. Compared to the fan control method based on the NUMA computer system structure is flexible to use, well extensible, highly practical, and easy to popularize.

The invention relates to a high temperature resistant composite matrix resin and a preparation method thereof. The high temperature resistant composite matrix resin comprises the following components: maleimide-based polyimide powder, diallyl compounds and bismaleimide resin powder. The preparation method of the high temperature resistant composite matrix resin comprises the following steps: mixing 1,4-bis(2,4-diaminophenoxy) benzene with strong polar aprotic organic solvent and adding raw materials such as maleic anhydride, and the like to prepare a resin solution; then adding a dehydrant, a catalyst and a precipitation agent and stirring the mixture to carry out reaction to separate solid powder; and placing the maleimide-based polyimide powder, the diallyl compounds and the bismaleimide resin powder into a reaction kettle to carry out melt polymerization reaction and dissolving the mixture in the organic solvent. The high temperature resistant composite matrix resin can be applied to glass-fiber reinforced composite materials and high-performance fiber-reinforced advanced composite materials such as carbon fiber, aramid fiber, and the like, and has simple process, low cost and no environment pollution, and can be prepared in general equipment, thereby being suitable for industrial production.

The invention relates to a polyimide carbon fiber tackifier with the molecular general formula shown at the right part. The preparation method of the tackifier comprises the steps as follows: quaternary primary aromatic amines and single anhydride are dissolved in strong-polarity aprotic organic solvent by the molar ratio of 1:2, mixed for reaction for 0.5-2 hours at the temperature of 0-20 DEG C; subsequently, binary primary aromatic amines and 2, 2-bi (3-amido-4-(4-cyano phenoxy) phenyl) Hexafluoropropane are added, mixed, dissolved and cooled by icy water bath; subsequently, binary aromatic anhydride is added and mixed for reaction for 2-4 hours at the temperature of 0-20 DEG C; subsequently, acidic catalyst and entrainer are added; after the heating refluxing water-diversion reaction for 5-12 hours, the entrainer is collected for recovery and reusing and transparent and sticky polyimide solution with uniform phase is obtained; the polyimide carbon fiber tackifier has excellent dimension stability, mechanic property and heat resistance; furthermore, the reaction condition of the preparation method is moderate, the reaction raw material has convenient source and low cost and is friendly to the environment.

The invention discloses an organic light emitting diode device, a display panel and a display device. The organic light emitting diode device is mainly characterized in that existing serial top-emitting OLED devices are improved, a homojunction structure is utilized and functional layers of the top-emitting OLED devices connected in series are improved, so that each function layer comprises a hole injection layer, a hole transmission layer, a hole side light-emitting layer, an electron injection layer, an electron transmission layer, an electron side light-emitting layer and at least one group of charge producing layers a and charge producing layers b located between the hole side light-emitting layer and the electron side light-emitting layer, the hole injection layer, the hole transmission layer and the hole side light-emitting layer are sequentially arranged on the side close to an anode, the electron injection layer, the electron transmission layer and the electron side light-emitting layer are sequentially arranged on the side close to a cathode. A first light-emitting unit ...and an Nth light-emitting unit of each serial top-emitting OLED device are of homojunction structures, the using categories of organic materials are decreased, injection potential barriers of charge carriers in the devices are eliminated, the charge carrier injection efficiency and the efficiency of the devices are improved, and drive voltage of the devices is reduced.

The invention relates to a high-temperature endurable active toughener powder used for epoxy resin, which comprises a general molecular structural formula as right, wherein -R1- is the diatomic linking group of aromatic series binary primary amine containing phenolic hydroxyl groups and -R2- is the diatomic linking group of aromatic series binary estolide molecule. The preparation method thereof comprises the steps of mixing the aromatic series binary primary amine, 2,2-Bis[4-(4-aminophenoxy)phenyl]propane and the aromatic series binary estolide with the mol ratio ranging from 1:1-5:2-6 in phenol solvent to react with each other at a temperature ranging from 100 to 150 DEG C for 5 hours and then pouring the obtained products into a precipitator stirred at a high speed to precipitate solid powder which is then filtered, washed, marinated, filtered and dried for preparing the high-temperature endurable active toughener powder for epoxy resin. The preparation method has the advantages of simple process and low cost, is environmental friendly, can finish the preparation process in universal equipment, and is applicable to industrial production.

The invention discloses a sample pretreatment method for detecting special nitrosamine in tobacco and tobacco products by LC-MS/MS (liquid chromatogram-mass spectrum/mass spectrum). The sample pretreatment method comprises the following steps of: (1) preparing ammonium acetate buffering solution; (2) drying and crushing the tobacco and tobacco products; (3) adding the ammonium acetate buffering solution in the crushed sample, and ultrasonically extracting; (4) carrying out high-speed centrifugation on the extracted sample at room temperature to obtain a first supernatant; (5) adding ethyl acetate in the first supernatant and carrying out extraction and purification, and then centrifuging to obtain a second supernatant; (6) taking the second supernatant, blow-drying by nitrogen and redissolving by deionized water to prepare sample to be detected; and (7) detecting tobacco special nitrosamine in the sample to be detected by virtue of LC-MS/MS. The sample pretreatment method disclosed by the invention has the advantages that the sample pretreatment method is simple and practicable; the tobacco special nitrosamine is dissolved out by the ammonium acetate buffering solution, and purified by the extraction of ethyl acetate solution, and proteins and interference substances are removed to obtain refined sample solution after impurity removal, thus the sample detection is high in accuracy, high in extraction efficiency, simple and convenient to operate, time-saving, and low in reagent consumption.

The invention relates to a polyimide paint for an optical fiber and a preparation method thereof. The paint comprises, by weight, maleimide polyimide, bimaleimide and polysiloxane imide containing phenolic hydroxyl group in a mass ratio of 1:0.1-0.2:0.5-2.0, and the balance of organic solvent; and a solid content of the paint is 10-30%. The preparation method comprises steps of: respectively preparing maleimide polyimide and polysiloxane imide containing phenolic hydroxyl group; and copolymerizing the two with bimaleimide. The raw material resins employed by the invention have easily controllable molecular weight and easily adjustable molecular structure, and are in favor of preparing polyimide paint for optical fiber, with ideal performances; and the method has advantages of simple process, low cost, environment-friendliness, a preparation process completed in a universal device, and suits for industrial production.

The invention discloses an industrial production method of Alogliptin benzoate raw material medicine. According to the method, ethanol/water mixed solvents are used as crystallization solvents; the ethanol/water mixed solvents and Alogliptin benzoate crude products are heated and flow back to a state that the solution is clear; the temperature is lowered, and crystal seeds are added; the gradient temperature reduction crystal separation is carried out; centrifugation and drying are carried out, and the Alogliptin benzoate raw material medicine is obtained. The adopted mixed solvents have low toxicity, and a better environment-friendly effect can be achieved. Compared with the method in the prior art, the industrial production method provided by the invention has the advantages that the solvent use type is reduced, the process is simple, the yield is high, and the production cost is reduced; through the method, the purity of the obtained Alogliptin benzoate finished product is at least 99.8 percent, the single impurity content is lower than or equal to 0.05 percent, the ethanol residue is low (lower than or equal to 0.1 percent) and is much lower than the limit of 0.5 percent of medical raw material medicine; impurities X generated by the reaction between phthalic acid and Alogliptin can be removed.

The invention discloses a GC-MS (gas chromatography-mass spectrometer) targeted tobacco sample sterol extraction method. The method comprises the following process steps: (1) freeze-drying a tobacco sample, and grinding the tobacco sample through a grinder; (2) adding 1.5ml of normal hexane in 50mg of ground tobacco sample, and performing ultrasonic extraction; (3) extracting the sample, performing high-speed centrifugation at room temperature, transferring a supernatant into a chromatographic bottle, and blow-drying with nitrogen to obtain a solution I; (4) adding 1.2ml of 80% methanol and 20% KOH solution into a precipitate; (5) performing high-speed centrifugation, transferring a supernatant into the chromatographic bottle, adding 1.0ml of normal hexane, and performing vibration and standing; (6) extracting a supernatant, adding 1.0ml of saturated NaCl, taking a supernatant as a solution II, combining the solution I and the solution II, blow-drying with nitrogen, and adding 0.5ml of chloroform for dissolution to obtain a tobacco sample sterol sampling analysis solution specially suitable for GC-MS measurement. The method has the advantages that the extraction method is optimally suitable for tobacco leaf sterol; the use amount of the sample is small and is only 50mg; few types of organic solvents are used, the use amount of the organic solvents is low, and the organic solvents are relatively cheap and small in toxicity; the extraction time is short, and the sample reproducibility is good.

The aplanatic lighted three-lens projecting display has two spectroscopes and at least one reflector to separate the incident white light into three color light beams and after the three color light beams are made to pass through separate aplanatic paths, they are projected to three light valves with output lens for image composition separately for regulation. Without using extending lens, the present invention has less variety of assemblies, and thus has relatively easy design and short development period.

The invention relates to a polyimide fiber spinning solution based on 2, 2-double [4-(2, 4-diaminophenoxy) phenyl group] hexafluoropropane and a preparation method thereof. The structural formula of components of the spinning solution is shown as below. The preparation method includes adding the 2, 2-double [4-(2, 4-diaminophenoxy) phenyl group] hexafluoropropane and a high-polar aprotic organic solvent into a reaction kettle, stirring for dissolution at the room temperature, adding phthalic anhydride, stirring for reaction for half an hour, cooling until the temperature is under 5 DEG C through an ice-water bath, adding 3, 3', 4, 4'-tetracarboxy benzophenone dianhydride, stirring for reaction for half an hour, adding pyromellitic dianhydride, maintaining the reaction temperature under 5 DEG C, and obtaining the solution after stirring for reaction for 2-4 hours. The polyimide fiber spinning solution based on the 2, 2-double [4-(2, 4-diaminophenoxy) phenyl group] hexafluoropropane and the preparation method thereof have the advantages that molecular weight of resin is easy to control, molecular structure is easy to regulate, preparation of high-performance polyimide fibers is facilitated, reaction condition of the preparation method is mild, and industrialization of products is facilitated.

The invention relates to a high-temperature resistant benzimidazole optical fiber coating and a preparation method of the coating. The coating comprises polyamic acid containing active vinyl, polybenzimidazole amic acid and high-polarity aprotic organic solvent. The preparation method comprises the following steps of dissolving benzimidazole diamine, diamine containing phenolic hydroxyl, and other aromatic diamine in the high-polarity aprotic organic solvent, cooling to 0 DEG C to 5 DEG C, adding aromatic diaanhydrid monomer, stirring and reacting for 5 to 10 hours, obtaining the polybenzimidazole amic acid solution, adding the polyamic acid solution containing the active ethenyl, stirring and uniformly mixing, and obtaining the high-temperature resistant benzimidazole optical fiber coating. The coating is simple in solidification process, good in high temperature resistance, and excellent in mechanical property and electrical property. The preparation method is simple, the reaction condition is mild, the process is easy to control, the preparation of the optical fiber coating with ideal performances is facilitated, and the industrialization prospect is good.