171 results about "Cutting agent" patented technology

The invention discloses a powder metallurgy transmission gear which is prepared from the raw materials containing the following components in percentage by weight: 1-5% of nickel, 1-3% of copper, 0.5-2% of molybdenum, 0.5-0.9% of graphite, 0.6-0.9% of lubricant, 0.3-0.5% of cutting agent and the balance of ferrum. The invention also discloses a manufacturing method of the powder metallurgy transmission gear. The powder metallurgy transmission gear has good self-lubricating performance, can meet the requirement on different parts with various specifications of a transmission gear of an automatic overrun clutch, and can greatly reduce the manufacturing cost and increase the utilization ratio of materials and the production rate.

The invention discloses a process for manufacturing the main drive inner core of a gasoline economizer for a motorcycle. The high-performance main drive inner core of the gasoline economizer for the motorcycle is manufactured with the powder metallurgy process including the material mixing process, the molding process and the sintering process and then with the mechanical processing process, the heat treating process, the surface treating process and the like. In the process of mixing the material, a small number of micronized wax is added to the material to be good for the molding of the work piece, and cutting agent of MnS is added to the material to be convenient for the subsequent mechanical processing of the work piece. The mixed material is molded at the high pressure of 600-800 Mpa so that the molded work piece has high density. The work piece is sintered at high temperature so that the copper powder permeates into the iron powder structure to improve the performance of the parts. In the invention, the material utilization ratio can be more than 95 percent, and the machining amount is less, thus the advantage that less cutting is needed in the powder metallurgy technology is fully reflected. The invention has the advantages of saving the material, simplifying the processing process and prolonging the service life of the work piece.

The invention discloses a combustion jet cutter used for steel structure member cutting. The combustion jet cutter consists of a jet cutter bottom, primer, a shell case, ignition agent, cutting agent and a nozzle, wherein thermite is based on plain thermit in the cutting agent; the plain thermit roughly accounts for 65-85wt% of the cutting agent; gas-forming agent is based on potassium nitrate which roughly accounts for 5-25wt% of the cutting agent; and slagging constituent and alloying agent roughly account for 7-20wt% of the cutting agent. During cutting, the combustion jet cutter is filled into a cutting gun, the cutting gun is held with a hand to aim at a cutting part, the jet cutter primer is triggered, inner ignition agent the jet cutter is ignited by the primer, the cutting agent is ignited by the ignition agent to generate high-temperature metallurgical melt and high-pressure gas, and a product is injected after being subjected to energy-gathering compression by the nozzle to locally melt the steel structure member so as to realize cutting. The jet cutter is mainly used for the quick thermal cutting and the underwater cutting of various steel structure members.

A preblend for making lactase tablets is prepared containing about 1-99% (preferably about 200-60%) by weight lactase and about 1-99% (preferably about 40-80%) by weight microcrystalline cellulose. Lactase used in the preblend may be in combination with up to about 4 parts (preferably about 0.5-2 parts) by weight cutting agent such as sugars, starches, cellulose, and inorganic salts for each part by weight lactase. About 0.5-4% by weight lubricant such as magnesium stearate may be present in the preblend. A preferred preblend contains about 9.6 weight percent lactase and about 90 weight percent microcrystalline cellulose, or about 2000 to about 9000 FCC lactase units and from about 40 to about 80 weight percent microcrystalline cellulose. Another preferred preblend contains about 9.6 weight percent lactase, about 30.0 weight percent microcrystalline cellulose and about 59.4 weight percent mannitol. Each preblend may also contain magnesium stearate. A preferred lactase is from Aspergillus oryzae and the microcrystalline cellulose preferably has an average particle size of about 10-200 μm.

The invention discloses a method for preparing oxytocin through solid phase polypeptide synthesis, comprising following steps: taking Rink Amide resin (comprising Rink Amide MBHA resin, Rink Amide Am resin) as raw material, taking amino acid protected by Fmoc, TBTU or HBTU/ HOBt as condensing agent, making up amino acid in sequence; adding peptide cutting agent for peptide cutting, adding for precipitation and getting reduced coarse product; adding basic matter, feeding air for oxidation or oxiding with H2O2 with pH being 7.5- 10.0, getting oxidized coarse product; separating and purifying by using C18 or C 8 column and getting final product. The method is characterized by low production cost, simple process, little pollution, high production rate and convenience for industrial production.

An aqueous cutting liquid comprises a cationic water-soluble resin having an amine value of 20 to 200 mgKOH/g, and at least one rheology control agent selected from the group consisting of an inorganic bentonite, an organic bentonite and an aqueous silica sol, wherein the content of a nonvolatile matter of the rheology control agent is 0.1 to 30 percent by weight of the amount of the nonvolatile matter of the cationic water-soluble resin. An aqueous cutting agent comprises the aqueous cutting liquid, and an abrasive grain, wherein the content of the abrasive grain is 100 to 1000 percent by weight of the amount of the nonvolatile matter of the aqueous cutting liquid. A hard and brittle material is cut by a cutting device using the aqueous cutting agent. The present invention provides an aqueous cutting agent which is excellent in dispersion stability of the abrasive grain and viscosity stability during cutting/slicing operations, aqueous cutting liquid usable for the aqueous cutting agent, and a cutting/slicing method excellent in cutting performance, cleanability and the like of the work material on cutting/slicing hard and brittle material by using the cutting agent.

The invention provides a lubrication cutting agent and a preparation method thereof. The lubrication cutting agent comprises: 10-40 parts of sulfurized cutting oil, 5-10 parts of naphthenic oil, 2-6 parts of triethyl phosphate, 1-4 parts of dinonyl naphthalene barium sulfonate, 0.2-1.5 parts of 1,2,6-butylated hydroxytoluene, 0.5-2.8 parts of dodecyl phenyl succinic acid, 1-5 parts of stearic acid, 0.1-1.2 parts of triethanolamine boric acid ester, 0.5-3.2 parts of sodium citrate, 0.3-1.2 parts of polyacrylamide, 12-18 parts of sodium dodecyl benzene sulfonate, 0.01-0.1 part of dodecenylsuccinic acid, 1-7 parts of oleamide, 5-13 parts of ethylenediamine tetraacetic acid tetrasodium, 0.2-0.8 part of chlorinated paraffin and 10-20 parts of hydrophilia polyhydric alcohols. The preparation method comprises steps of firstly, uniformly mixing a part of the components, and secondly, adding the rest components. The lubrication cutting agent provided by the invention has remarkable effects on improving the surface smoothness of a workpiece and alleviating abrasion of a cutter.

The invention discloses an iron core for an engine cooling fan and a manufacturing process thereof. The iron core is a powder metallurgical material prepared from the following raw materials by weight percent: 0.01-1.0% of phosphorus, 0.1-1.5% of free cutting agents, 0.2-2% of lubricating agents, 0.01-1.5% of binding agents and the balance iron powder. The manufacturing process of the iron core comprises the steps of material mixing, forming, sintering, sealing, reshaping, auxiliary machining and surface treatment. The invention has the following beneficial effects: a powder metallurgy process is simple and reliable, ensures that the production efficiency and material utilization are greatly improved, and is especially suitable for mass production; and the iron core product formed by a mould has the advantages of stable quality, high machining precision, low manufacturing cost, good sealing property, capability of reducing the weight of the engine when the iron core is used for the engine cooling fan, low energy consumption, obvious oil saving effect, improvement of the overall property of the engine cooling fan and the like, and is convenient and safe in assembly.

The invention publishes a kind of environmental plastic raceway. It is composed by polyether diatomic alcohol, polyether triatomic alcohol, TDI, PAPI, filling, ph chain cutting agent and others accessory ingredient. The invention also publishes the manufacturing methods. The process contains polyalcohol water after polyether, prepolymerization, adding filling and accessory ingredient, filtering and packaging. The construction contains cleaning up the base, lay down bottom, laying down frade lamella, spinkling colloidal particle, coating surface glue and marking out. The invention, environmental plastic raceway, has many advantages, such as innocuity, convenient manufacture, transport and construction, and good physics capability.

The invention provides a powder metallurgy material used for pressing and sintering an exhaust seat ring. The powder metallurgy used for pressing and sintering the seat ring comprises the following components in percentage by mass: 0.8 to 1.3 percent of C, 1.5 to 3.0 percent of Cr, 1.0 to 3.0 percent of Mo, 3.0 to 6.5 percent of Co, 0.5 to 2.0 percent of Ni, 0.8 to 1.5 percent of MnS, 0.05 to 0.3 percent of P, 0.2 to 0.5 percent of V, 0.2 to 3.0 percent of W, and the balance Fe and unavoidable impurities. After the W is added, a hard particles is formed, and the power metallurgy material has higher wear resistance, impact resistance, corrosion resistance, and abrasion resistance at a high temperature, so that the bench testing time of the exhaust seat ring can reach 450 hours. Due to the addition of fatty acid diamide, the problem of furnace chamber scaling in a sintering process is solved; and by adding an anti-segregation agent and a free-cutting agent, the segregation of a finished product is avoided, the cutting is facilitated, and the size precision and surface roughness of a cutting surface are ensured.

The preparation process of solid phase polypeptide synthesized eptifibatide includes the following steps: (1) connecting amino acids one by one with Rink Amide resin, Rink Amide MBHA resin or Rink Amide AM resin as initial material, and Fmoc protected amino aids as monomer, with the last peptide chain being S-benzyl mercapto propionic acid Map(SBzl); (2) adding peptide cutting agent (TFA/HBr/HAc/TIS/EDT) to cut peptide; (3) precipitating and collecting coarse reductant eptifibatide product in ether solvent; (4) dissolving coarse reductant eptifibatide product in water, regulating pH value with ammonia water to 7.5-10.0, introducing air for oxidation, and collecting coarse eptifibatide product; and (5) separating and purifying the coarse product in C18 column to obtain the target product. The present invention has high yield, and is suitable for industrial production.

The invention relates to oral ibuprofen pellet xerogel and a preparation method thereof. The oral ibuprofen pellet xerogel comprises ibuprofen pellets evenly distributed in a xerogel matrix, wherein the xerogel matrix contains a xerogel forming agent, a curing agent, a sweetening agent, an aromatic and a preservative. The oral ibuprofen pellet xerogel consists of, by weight, raw materials including ibuprofen 20-100 parts, filler 10-100 parts, binding agent 5-60 parts, pellet coating material 2-20 parts, xerogel forming agent 100-400 parts, cutting agent 5-30 parts, sweetening agent 10-2000 parts, aromatic 10-50 parts and preservative 1-15 parts. The oral ibuprofen pellet xerogel has the advantage of being high in pharmaceutical stability, exquisite in appearance, good in taste, convenient to take, high in bioavailability, good in patient (especially children) medication compliance, accurate in dosage, simple in preparation process, convenient to carry and transport and suitable for industrial production.

Methods are provided that include a method of a) placing a hydrojetting tool into a subterranean formation; b) introducing a jetting fluid that includes an aqueous base fluid, a stabilizing agent, and a cutting agent into the subterranean formation by use of the hydrojetting tool at a rate sufficient to create at least one fracture; c) introducing a slug fluid that includes an aqueous base fluid and a degradable diverting agent into an annulus formed between the hydrojetting tool and the subterranean formation; d) introducing a propping fluid that includes an aqueous base fluid and proppants coated with a consolidating agent into the annulus formed between the hydrojetting tool and the subterranean formation; and e) placing the proppants in the fracture.

The invention discloses a powder metallurgical gear. The powder metallurgical gear is prepared from water atomization iron powder, copper powder, molybdenum powder, vanadium powder, nickel powder, yttrium powder, aluminum powder, magnesium powder, cobalt powder, lead powder, steel slag powder, iron-melted furnace slag powder, ferroalloy slag powder, modified tree ash powder, graphite powder, amino resin, polyether modified silicone, hydroxypropyl methyl cellulose, zinc stearate, polyethylene glycol, ethylene bisstearamide, stearic acid, carbon fibers, glass fibers, boron nitride, epoxypropoxy propyl trimethoxysilane, silicon dioxide, manganese sulfide, acrylate, an inhibitor, a binder, an enhancer, a cutting agent, a lubricant, a coupling agent and a dispersing agent. According to the powder metallurgical gear, by means of specific composition proportion, the overall density is uniform, the compactness is high, the elongation and reduction of cross section are high, the abrasion resistance, strength and hardness are good, the material utilization rate is high, and the materials are suitable for rapidly producing high-performance gears on large scale.

The invention discloses a preparing method of thymic pentagon through solid-phase polypeptide, which comprises the following steps: (1) adopting CTC resin (or Wang resin) as original material, Fmoc protected amino acid as monomer, TBTU/HOBt (or HBTU/HOBt) as condensing agent to connect amino acid sequently; utilizing Boc-Arg-OH for the last peptide chain; adding the endope cutting agent in the product of step (1) to cut peptide; adding ether to deposit; collecting crude product; (3) adapting C18 or C8 pillar to proceed separating and purifying the crude product in the step (2) to obtain the object product.

The invention provides a solid phase synthesis method for a 2, 4, 6-trisubstituted-1, 3, 5-triazine derivative library. The method comprises the following steps that: aldehyde group resin reacts with primary amine in organic solvent; resin containing a secondary amine structure is obtained through reductive amination; the resin reacts with 2, 4, 6-trisubstituted-1, 3, 5-triazine so as to obtain resin connected with a triazine mother ring, and then the resin reacts with primary amine or secondary amine so as to have 6-chlorine replaced; finally a formed product is cut from the resin through a cutting agent, so as to obtain a 2, 4, 6-trisubstituted-1, 3, 5-triazine derivative with molecular diversity. The 2, 4, 6-trisubstituted-1, 3, 5-triazine derivative provided by the invention is moderate in synthesis condition, easy to get raw materials, high in yield and beneficial to high-throughput screening and the discovery of anti-cancer anticancer drug lead compounds.

The invention discloses a novel powder metallurgy transmission gear. The novel powder metallurgy transmission gear is prepared from water-atomized iron powder, copper powder, molybdenum powder, vanadium powder, nickel powder, yttrium powder, aluminum powder, magnesium powder, cobalt powder, lead powder, steel slag powder, cupola slag powder, iron alloy slag powder, modified tree ash powder, graphite powder, China wood oil-based alkyd resin, dimethyl silicone oil, ethylcellulose, zinc stearate, polyethylene glycol, ethylene bis stearamide, fatty acid, carbon fibers, glass fibers, boron nitride, epoxypropoxy trimethoxypropylsilane, silicon dioxide, manganese sulfide, acrylate, an inhibitor, a bonder, a reinforcer, a cutting agent, a lubricant, a coupling agent and a dispersant. Through the specific ingredient proportion, the novel powder metallurgy transmission gear is uniform in overall density, high in compactness, large in elongation and section shrinkage rate, good in wear resistance, strength and hardness, high in material utilization rate and suitable for large-batch rapid production of high-performance gears.

The invention provides a fluorine-containing oil-based drilling fluid extracting and cutting agent and a preparation method thereof. The preparation method comprises the following steps according to the ratio: a, adding 10-300g of acrylic ester and 0.1-60g of perfluoroalkyl ethyl acrylic ester into 1L of dimethyl sulfoxide solvent, and stirring at room temperature until acrylic ester and perfluoroalkyl ethyl acrylic ester are completely dissolved; b, adding 0.1-10g of azodiisobutyronitrile into a dissolved solution obtained in the step a, stirring until azodiisobutyronitrile is dissolved, then placing the dissolved solution in a thermostatic waterbath at the temperature of 25 DEG C, stirring and introducing nitrogen for 25-35 minutes; c, increasing temperature of a solution obtained in the step b to 50-80 DEG C, and reacting for 4-36 hours to obtain a polymer solution; and d, placing the polymer solution obtained in the step c into a mixed solution of absolute acetone and absolute ether in volume ratio of 1:1, and drying and smashing sediments to obtain the fluorine-containing oil-based drilling fluid extracting and cutting agent product.

The invention discloses an automobile shaft component powder metallurgy material. The automobile shaft component powder metallurgy material comprises the following raw materials of iron powder, chromium powder, molybdenum powder, copper powder, nickel powder, lead oxide powder, yttrium powder, titanium carbide powder, tantalum carbide powder, tin powder, zinc oxide powder, aluminum oxide powder, graphene powder, pentaerythritol, stearic acid, boron fibers, basalt fibers, polypropylene resin, hydroxypropyl methylcellulose, ethylene-bis-stearamide, polyethylene wax, epoxy propoxy propyl trimethoxy silane, silicon carbide, manganous sulphide, tributoxyethyl phosphate, an inhibitor, a binder, an enhancer, a cutting agent, a lubricating agent, a cross-linking agent, a dispersing agent and an adjusting agent. According to the automobile shaft component powder metallurgy material, by means of the specific composition proportion, the automobile shaft component powder metallurgy material is uniform in overall density, high in density, large in ductility and percentage reduction of area, good in wear resistance, strength and hardness and high in material utilization rate, and high-performance automobile shaft component powder metallurgy materials can be produced fast on a large scale.

The invention provides a method for synthesizing eptifibatide. The method comprises the steps of: (1) condensing Fmoc Rinklinker with AM resin having a degree of substitution of 0.8 to 1.2 mmol/g, so as to acquire a Fmoc-polypeptide resin, (2) mixing the Fmoc-polypeptide resin with a protective agent and removing the Fmoc protecting base so as to acquire a protected polypeptide resin, (3) condensing the protected amino acid of the Fmoc with the protected polypeptide resin by using the condensing agent, (4) repeating the step (2) to step (3) so as to acquire a hexapeptide resin, (5) condensing the hexapeptide resin with Mpa(Trt)-OH so as to acquire a heptamer resin, (6) separating the heptamer from the resin by using cutting agent so as to acquire the crude product of eptifibatide, and (7) oxidizing and cyclizing the crude product of eptifibatide in order to acquire the eptifibatide. The method of the invention can promote the yield of the eptifibatide, decrease the cost and promote the purity.

The invention provides an oil-based drilling fluid extracting and cutting agent and a preparation method thereof. The method comprises the following steps: maleic anhydride and styrene are subjected to a polymerization reaction under existence of a solvent and an initiator to obtain a mixture; the obtained mixture is subjected to a reaction under existence of an alcohols compound and a catalyst to obtain an extracting and cutting agent crude product; and the obtained extracting and cutting agent crude product is subjected to removal of an organic solvent, and then is dried and crushed to obtain the oil-based drilling fluid extracting and cutting agent. The oil-based drilling fluid extracting and cutting agent has a long straight chain alkyl group and contains a lot of polar groups, net structures are formed by the long chain alkyl group in an oil-based drilling fluid through association action, the polar groups in molecules are capable of interacting with other groups through electrostatic attraction or hydrogen bond, so that the net structure with larger specific surface area is formed, and the existence of the net structures effectively increases the dynamic cutting force of the drilling fluid.