68results about How to "Other performance impact" patented technology

The invention relates to the design and synthesis of a poly carboxylic acid water reducing agent, the coagulating time of which can be controlled. The poly carboxylic acid water reducing agent is prepared by co-polymerize the following three monomers in water: the monomer a occupying 30 to 70 percent and indicated by a general expression 1, the monomer b occupying 10 to 50 percent and indicated by the general expression 2, and the monomer c occupying 10 to 40 percent and indicated by the general expression 3. The coagulating time is controlled by the monomer a which is made by condensing maleic anhydride and polyoxyethylene monoalkyl ether. The length of a polyoxyethylene monoalkyl ether chain controls the change of the coagulating time: the longer the chain, the shorter the coagulating time is; and the shorter the chain is, the longer the coagulating time is. The monomer a does not contain inhibitive substances in the process of synthesis, therefore, the water reducing agent is easy to be controlled in the coagulating process. The poly carboxylic acid water reducing agent is suitable for the construction of concrete under different temperature conditions: under higher temperature, the water reducing agent with longer coagulating time can be adopted, and under lower temperature, the water reducing agent with shorter coagulating time can be adopted. The poly carboxylic acid water reducing agent has good adaptability to cement and admixtures and has the advantages of low mixing quantity, good slump constant hold facility and water segregation resistance, and the like.

The invention relates to antibacterial paint and a production process, which comprises raw materials with following parts by weight of 1-10 parts of antibacterial agent. 2-30 parts of organic silicate, 10-40 parts of silane coupling agent and 40-90 parts of water, wherein antibacterial agent is triclosan and pyridine thione. The preparation process comprises adding water with required quantity in a liquid mixing container, adding organic silicate with required quantity into water, adding silane coupling agent after evenly agitated, continuing to agitate to make solution evenly mix, adding anti-bacterial agent of triclosan and pyridine thione, and continuing to agitate for 20 minutes. The invention solves the technical problem that fungicide and addition agent which are adopted by current anti-bacterial paint can affect environment and the health of persons, and has significant mildew proof, anti-bacterial and bacterial inhibiting property. And anti-bacterial material which is adopted belongs to no toxic material, has no harmful affect to environment and human health, and can realize anti-bacterial effect with long-term and high efficiency.

The invention provides a high-specific-surface-area Fischer-Tropsch synthesis catalyst and a preparation method and application of the high-specific-surface-area Fischer-Tropsch synthesis catalyst. Organisms with different types and contents are added into different stages of catalyst preparation by a traditional coprecipitation method, for example, micromolecule organisms are added in the precipitation process so as to inhibit the aggregation of particles in the precipitation process, so that the dispersion degree of the whole system is improved; macromolecule organisms are introduced into a filter cake so as to inhibit the clustering of particles in the thermal treatment process, and can play a role of pore forming when being removed in a baking process; meanwhile, with the combination of the use of a high-thermal-stability additive, the contraction and collapse of a framework of the catalyst in the thermal treatment process can be prevented effectively; the method can be used for obviously improving the specific surface area of the Fischer-Tropsch synthesis ferrous catalyst, so that the activity of the catalyst can be improved greatly.

The invention relates to a vane pump, which comprises a stator where an oil inlet arc-shaped groove and an oil discharge arc-shaped groove are formed, a rotor eccentrically accommodated in the stator, a plurality of vane grooves radially formed in the rotor and a plurality of vanes, wherein each vane is respectively suitable for stretching out and returning in corresponding vane groove in a reciprocated manner. A circular oil duct is formed in the rotor or in a side plate on one side of the rotor, communicated with the oil discharge arc-shaped groove on the one hand and with the rear end of each vane groove on the other hand for applying oil discharge side pressure on the inner end surface of the vane so that the differential pressure between the inner and the outer end surfaces of the vane is generated when the pump is started at a low speed. The upstream end of the oil inlet arc-shaped groove is arranged in a position of zero clearance rotating along with the rotary direction for 90 degrees plus a lag angle of relative to a zero degree position. The invention has the advantages of excellent vane pump performance, simple structure, low manufacturing cost and reliable performance.

The invention relates to a high-peeling strength polyethylene conveying belt and a manufacturing method thereof. A jointing layer is arranged between polyester fabric and a polyethylene layer, and the jointing layer is an ethylene grafted methyl methacrylate copolymer. The manufacturing method comprises the following steps of: crushing the ethylene grafted methyl methacrylate copolymer into powder at low temperature; carrying out heat treatment on the polyester fabric; coating the ethylene grafted methyl methacrylate copolymer powder on the upper surface of the polyester fabric, and carrying out heat setting at 170-190 DEG C to enable the modified polyethylene to be combined with the polyester fabric to form the jointing layer; coating polyethylene powder on the upper surface of the jointing layer to form the polyethylene layer; and compacting the fabric through a hot compression roller, and then cooling the fabric to room temperature to obtain the polyethylene conveying belt. The invention has the advantages that the ethylene grafted methyl methacrylate copolymer is used as the jointing layer to enable the polyethylene to have polar groups, and the peeling strength is greatly improved by combining chemical bonds and the polyester fabric.

The invention relates to an automotive starter carbon brush material and a preparation method thereof. The carbon brush material is prepared from, by mass, 60-64 parts of copper powder, 32-38 parts of graphite, 3-6 parts of molybdenum disulfide, 1-1.5 parts of tin powder, 0.4-0.6 part of carbonyl iron powder and 0-0.9 part of a friction component; and the graphite is a combination of micro-fine graphite and colloidal graphite, and the mass ratio of the micro-fine graphite to the colloidal graphite is (0.66-1.5): 1. According to the automotive starter carbon brush material and the preparation method thereof, by introducing the carbonyl iron powder to strengthen a matrix, the micro-fine graphite and the colloidal graphite in different particle sizes are selected to be matched so that the graphite distribution uniformity and the interface bonding capacity between the graphite and the matrix can be improved, a specific preparation process is used in cooperation, and the carbon brush material with good electric conductivity and abrasion resistance is obtained; and meanwhile, a carbon brush has good heat conduction performance and mechanical performance, the service life of the carbon brush is prolonged, and the application prospects are wide.

The invention discloses a method for reducing a cobalt-base Fischer Tropsch synthesis catalyst. The method comprises a gas replacing and catalyst drying process, a reducing process and a passivating process. In the passivating process, mixed gas of water vapor or oxygen-containing organic steam and hydrogen is switched in a reduction system, wherein the volume concentration of the water vapor or the oxygen-containing organic steam in the mixed gas is in the range of 1 to 5 percent; the airspeed of the mixed gas is in the range of 500 to 2,000h<-1>; the passivating temperature is in the range of 180 to 280 DEG C; and the passivating time is in the range of 4 to 16h. For the cobalt-base Fischer Tropsch synthesis catalyst reduced by the method, when the high activity in the stationary phase is kept, the initial activity is also reduced.

The invention discloses a baster-batch special for a buried polyethylene drainage pipeline. The baster-batch is prepared by the following steps of: mixing spheroid inorganic powder and needle flake-shaped inorganic powder according to a certain proportion to form composite inorganic powder; preheating, then adding a coupling agent and uniformly mixing; then adding a lubricant, a plasticizer, active monomer, an initiator, an antioxidant and a polyethylene carrier, highly mixing and discharging; and blending and extruding through double screws and pelletizing. When the filling masterbatch prepared by the invention is used for pipes of small and medium apertures, the weight of every meter of the pipe can be reduced by 5-7 percent. When the masterbatch is used for a large-aperture pipe, the amount of the added masterbatch can reach 40-50 percent; compared with other spheroid inorganic powder masterbatch filled pipelines of the same specification, the modulus can be improved by about 30 percent; and compared with other needle flake-shaped inorganic powder masterbatch filled pipelines of the same specification, the impact property can be improved greatly.

The invention provides an antibacterial coating which comprises a nano silver/ kaolin antibacterial agent and a zinc oxide/kaolin antibacterial agent, wherein a weight ratio of the nano silver/ kaolin antibacterial agent to the zinc oxide/kaolin antibacterial agent is 0-1. The invention also provides a method for preparing the antibacterial coating.

The invention relates to an emulsifier for high-iron emulsified asphalt and a preparation method thereof. The emulsifier comprises the following raw materials in part by weight: 35.6 to 63.0 parts of alkylamine emulsifier, 20.2 to 38.3 parts of polyxyethylated alkylphenol emulsifier, 0.3 to 1.1 parts of aid 1, 0 to 1.0 part of aid 2 and 5.0 to 8.0 parts of aid 3. The emulsified asphalt prepared from the emulsifier can be used in a relatively wide temperature range and can be cooled rapidly without breaking emulsion. The emulsifier has the outstanding characteristics that: an emulsifier which is suitable for different temperature environments can be compounded by adjusting the composition proportion of the emulsifier and the problems of poor thermal stability of the high-iron emulsified asphalt and easy emulsion breaking are solved; and the emulsifier has high thermal stability, a small using amount and a wide application range, is easy and convenient to operate during use, can be prepared into high-stability high-iron emulsified asphalt and can lower the cost of an emulsion additive by about 20 percent.

The invention relates to the technical field of engineering plastic toughening modification, in particular to a matte organic silicon high-impact toughening agent and a preparation method thereof. The preparation method comprises the steps that organopolysiloxane core emulsion and acrylate rubber emulsion serve as main raw materials, shell monomer mixed liquid and an initiator B are added for an emulsion polymerization reaction, and matte emulsion is prepared; the matte organic silicon high-impact toughening agent obtained by demulsifying and drying not only has the low glass transition temperature and low-temperature impact strength of organic silicon rubber, but also has the characteristics of high temperature resistance, weather aging resistance, oil resistance, easiness in processing and the like of acrylate rubber; and when AS resin is used for producing ASA resin, after the matte organic silicon high-impact toughening agent is added, the surface of the ASA resin becomes uneven and rough microscopically, when light irradiates the surface of an ASA resin material, part of the light is absorbed and refracted into the material, and the other part of the light generates diffuse reflection on a rough interface of the resin and rubber, so that matt effect can be achieved.

A flatting agent for a polyester hydroxyalkylamide type powder coating and a preparation method thereof. The flatting agent comprises the components of acrylic resin synthesized from (methyl) glycidyl acrylate and other monomers, C10-C18 long-chain diacid, wax or wax analog, and a metal salt or organic metal complex. The flatting agent provided by the invention is obtained by grinding and mixing acrylic resin, C10-C18 long-chain diacid, wax or wax analog, and metal salt or organic metal complex according to the proportion at room temperature. The flatting agent provided by the invention can be used in a polyester-hydroxyalkylamide type powder coating to form a good flatting film after curing, and does not generate unfavorable influences on other performances of the film.

The invention discloses diatomite modified concrete and a preparation method thereof. The diatomite modified concrete is composed of the following components in parts by weight: 15-20 parts of cement,1-5 parts of diatomite, 6-8 parts of water, 25-30 parts of river sand, 40-45 parts of crushed stones and 0.2-0.5 part of a water reducer. The diatomite modified concrete disclosed by the invention has the advantages that diatom is doped in concrete in a certain ratio, the diatomite is pretreated in advance in a process of preparing the concrete, the prepared concrete solves the problem that initial shrinkage of high-strength concrete is large, and brittleness of the high-strength concrete can be effectively reduced without reducing strength of the high-strength concrete.

The invention relates to a work starting method for slurry bed Fisher-Tropsch synthesis, which is characterized in that a proper amount of a reduced ft synthesis catalyst and a reaction solvent are weighted and placed in a slurry bed reactor, after airtight and gas displacement, the hydrogen mixed gas containing water vapor or organic matter steam containing oxygen is introduced and a stirring device is switched on, the volume concentration of water vapor or oxygen-containing organic matter steam is 1-5%, the volume space velocity of the gas mixture is 500-2000h<-1>, the temperature is heated to 250-350 DEG C, the pressure is controlled at 2.5-3.5 MPa, the temperature and the pressure can be reduced after 1-3 hours to reach the Fisher-Tropsch synthesis reaction condition, and the synthesis gas is switched for Fisher-Tropsch synthesis reaction. The work starting method is used for keeping the high activity during the stable period of a cobalt-based Fischer-Tropasch synthetic catalyst, and reducing the initial activity of the catalyst.

The invention provides an antibacterial polyester finishing coat used for color coating sheet steel, and a preparation method, belonging to the field of coil coatings. The method comprises the following steps: adding part of polyester finishing coat components, all saturated polyester resin components, all antibacterial agent component, part of finishing coat diluter component and part of assistant components into a sand mill, uniformly grinding all the components, then adding the ground materials into a high speed dispersion machine and adding the remaining materials in the formula, consequently, the antibacterial polyester finishing coat finished product is obtained after high speed stirring. The finishing coat has the advantages of highly efficient antibacterial property due to the containing of the antibacterial agent, no effect on other properties of the polyester finishing coat, no need of complicated equipment for the preparation, no need of the adding of the sand mill and the high speed dispersion machine due to that the sand mill and the high speed dispersion machine are the indispensible ready equipment in coil coating production industry and color coating sheet steel industry, and simple preparation technology.

The invention relates to a fixation structure on a small-scale universal airplane, and particularly to a plug-in equipment fixing device for a small-scale universal airplane. The plug-in equipment fixing device comprises a transitional mounting plate fixedly mounted on an airplane floor through a fixing device, wherein the transitional mounting plate is mounted above a fairing at the lower part of the airplane; an equipment via hole is formed in the fairing; the equipment via hole is located under the transitional mounting plate and corresponds to the transitional mounting plate. The plug-in equipment fixing structure is designed by regarding the small-scale universal airplane body as a basis and combining the installation position of airplane onboard equipment and the spatial position of an airplane belly, so that an infrared detection suspension cabin can be uploaded on the airplane, the use requirements such as aerial survey and aerial photo of the airplane and air patrol for farming , forestry , husbandry and fishing industries are satisfied, and the multi-purpose of the small-scale universal airplane is expanded.

The invention discloses a planar vertical double-diffusion metal-oxide-semiconductor (VDMOS) device and a manufacturing method thereof. The method comprises: a gate oxide layer is generated on an epitaxial layer and polysilicon layers are generated on the gate oxide layer; the polysilicon layers are etched to form polysilicon gates; ion implantation is carried out to form doped polysilicon gates; photoresist masks are formed on the surfaces of the doped polysilicon gates and the gate oxide layer; the doped polysilicon gates are etched to form polysilicon gate grooves; and thermal oxidation is carried out on the polysilicon gate grooves and the doped polysilicon gate surfaces to form oxide layers. According to the invention, with the change of the structure of the polysilicon gate, the doped polysilicon gates are divided into two parts by the oxide layers, so that the gate-drain capacitance is reduced under the circumstance that no other parameters are affected.