121results about How to "Appropriate toughness" patented technology

The invention relates to a water-based primer-topcoat braking paint and a preparation method thereof. The braking paint comprises the following materials by weight percentage: 30-40 of water-based acrylic resin, 2-10 of amino resin, 1-3 of neutralizing agent, 2-5 of compound rustproofing pigment, 1-3 of tinting pigment, 10-20 of filling agent, 0.1-0.5 of defoaming agent, 0.1-0.5 of flatting agent and 25-40 of deionized water, wherein the water-based acrylic resin is a free radical polymerization resultant which comprises the following materials by weight percentage: 10-30 of monomer containing hydroxy acrylic acid, 5-20 of monomer containing carboxyl acrylic acid, 2-8 of internal crosslinking monomer, 20-40 of other acrylic acid monomer, 15-30 of phenyl ethylene monomer, 1-5 of evocating agent and 40-50 of alcohol ether latent solvent. When the paint is prepared, the dispersion and the abrading condition of the pigments and the filling agents are reasonably controlled to ensure that each component of the paint fully plays the respective function. The paint ensures the corrosion prevention effect and the decoration of a coating and realizes the combination of a primer and a topcoat.

The invention discloses fast rush-repair mortar for a ballastless track filling layer and a preparation method and an application thereof. The fast rush-repair mortar comprises the following components in parts by mass: 0.95-0.99 part of cement, 0.01-0.05 part of cement expansion admixture, 0.001-0.0025 part of fiber, 0.35-1.4 parts of macromolecular emulsion, 1.5-2 parts of sand, 0.001-0.005 part of thickening time control agent, 0.0004-0.01 part of antifoaming agent, 0.0001-0.003 part of gas forming agent, 0-0.01 part of air entraining agent, 0-0.02 part of water reducing agent, 0-0.001 part of rheology modifier and 0-0.3 part of water, wherein the cement and the cement expansion admixture account for 1 part in total. The rush-repair mortar disclosed by the invention has the advantages of fast setting and early strength and excellent thermal adaptability and application property, and guarantees recovery of railway operation in a skylight period of 4 hours in a severe cold area.

The invention provides hydroxyl acrylic resin and a preparation method thereof. The hydroxyl acrylic resin is prepared by performing a reaction on the following raw materials in parts by weight: 60 to 90 parts of hard monomers, 10 to 30 parts of soft monomers, 5 to 20 parts of hydroxyl monomers, 0.5 to 5 parts of carboxyl monomers, 1 to 5 parts of initiators, and 1 to 5 parts of chain transfer agents. The dosages of the hard monomers are more, so that the hardness of the prepared hydroxyl acrylic resin is strengthened; the dosages of the soft monomers are proper, so that the proper toughness of the hydroxyl acrylic resin can be maintained. Compared with the prior art, the dosages of the hydroxyl monomers are reduced to some extent, so that the surface drying speed of the hydroxyl acrylic resin is further increased, and the hydroxyl acrylic resin has a higher glass-transition temperature. At the same time, the content of the hydroxyl is moderate, so that the hydroxyl acrylic resin can maintain excellent crosslink density and solvent resistance; moreover, the chain transfer agents are utilized to control the molecular weight of the hydroxyl acrylic resin, so that the hydroxyl acrylic resin is not only relatively higher in solid contents, but also lower in viscosity.

The invention provides an axle shaft steel. The axle shaft steel comprises the following chemical components in percentage by weight: 0.47 to 0.54 percent of C, 0.2 to 0.4 percent of Si, 0.7 to 0.9 percent of Mn, less than or equal to 0.02 percent of P, less than or equal to 0.02 percent of S, 0.02 to 0.04 percent of Al, 0.02 to 0.06 percent of V, 0.15 to 0.3 percent of Cr, less than or equal to 0.2 percent of Ni, less than or equal to 0.2 percent of Cu, less than or equal to 0.00025 percent of H, less than or equal to 0.002 percent of O, less than or equal to 0.007 percent of N, and the balance of iron and impurities. The invention also provides a preparation method for the axle shaft steel. The axle shaft steel provided by the invention not only has higher proper strength and toughness,but also ensures the production cost to be lower than that of the axel shaft prepared through repeated thermal treatment in the prior art.

The invention provides a wheel steel which contains the following chemical components measured by simple substances on the basis of the total weight of the wheel steel: 0.07-0.12wt% of C, 0.01-0.15wt% of Si, 1.1-1.3wt% of Mn, 0.01-0.04wt% of Ti, 0.001-0.004wt% of Ca, 0.015-0.065wt% of acid-soluble Al, not larger than 0.025wt% of P, not larger than 0.015wt% of S and 97.31-98.87wt% of Fe. The invention also provides a preparation method of the wheel steel and a wheel, wherein the wheel is made of the wheel steel provided by the invention. The wheel steel provided by the invention has proper higher strength and toughness.

The invention relates to a composite biomaterial containing cross-linked hyaluronic acid derivative and hydroxylapatite and a preparation method thereof. The composite biomaterial is characterized by containing the cross-linked hyaluronic acid derivative and the hydroxylapatite. The composite biomaterial can be obtained by uniformly mixing hyaluronic acid or soluble salt of the hyaluronic acid with the hydroxylapatite and then carrying out the cross-linked reaction, or can be obtained by firstly preparing the cross-linked hyaluronic acid derivative and then uniformly mixing the cross-linked hyaluronic acid derivative with the hydroxylapatite. The composite biomaterial has good biological compatibility, has suitable rate of biodegradation, mechanical property, pore diameter and porosity, and can be used as the cytoskeleton to be applied to bone or cartilage tissue engineering.

A composite suppository for treating pile, phlebitis and phlebeurysma is prepared from micro-granular diosmin and hesperidin, matrix for suppository and additive.

The invention belongs to the field of communication materials, and in particular relates to an adhesive sheet for a copper-clad laminate. The adhesive sheet with a controllable area, a smooth surface, a uniform easy-to-control thickness and suitable toughness and viscosity is prepared by mixing uniformly resin, an inorganic filler and an auxiliary agent, then hot pressing, sintering, turning, and the like. According to actual application scenes, various types of composite adhesive sheets are prepared by selecting of the suitable resin and inorganic filler, and prepregs with various polymer matrixes, different dielectric properties and different surface structures can be well composited. In particular, due to the use of glass fiber and other reinforcing materials, the dielectric properties of the adhesive sheet can be adjusted to a large extent, and the practicability and universality of the adhesive sheet can be effectively enhanced. In the invention, the adhesive sheets and the prepregs are well compatible and strong in adhesion, and a prepared multilayer board has good thermal and mechanical performances, high stability and low hygroscopicity, and can meet comprehensive performance requirements of different communication fields on the copper-clad laminate.

The invention relates to an ultraviolet light or electron beam-cured resin composition for a blue-ray disc. The cured resin composition can be obtained by the following steps of: based on the parts by weight of a prepolymer, mixing 20-80 parts by weight of urethane acrylate resin prepolymer, 10-50 parts by weight of active monofunctional monomer, 0-10 parts by weight of bifunctional monomer or multifunctional monomer (preferably 1-10 parts by weight of bifunctional monomer or multifunctional monomer), 0-8 parts by weight of photo initiator and 0.2-5 parts by weight of aid; stirring uniformly;and filtering. Blue laser light with the wavelength of about 405 nanometers can pass through an euphotic layer obtained by curing the cured resin composition, so that information recording can be carried out on the blue-ray disc and the blue-ray disc can be recycled.

The invention discloses a layered facial mask. The layered facial mask contains a two-layer structure and a three-layer structure. The two-layer structure comprises a facial mask inner layer and a facial mask outer layer. The three-layer structure comprises a facial mask inner layer, a facial mask middle layer and a facial mask outer layer. The facial inner layers contain active component layers respectively. The facial middle layer is a storage layer. The facial mask outer layers are water supplementing protection layers. In the two-layer facial mask, because active components concentrate in the facial mask inner layer close to skin, the diffusion distance of the active components of the facial mask to a face is shortened, the transdermal absorption ratio in unit time is raised, and residual of the active components is reduced. Because the three-layer facial mask contains the active component storage layer, the active components release slowly, and thus the facial mask can be used for multiple times. The azone content is controlled, and the facial mask is beautiful. The hydrolyzed collagen content is adjusted, and facial mask molding is easy and the toughness is proper. The matrix part of the facial mask outer layer has a water supplementing function. Because the different layers of the facial mask employs the same matrix, the facial mask is milky or transparent and has uniformity.

The invention discloses a complex ceramic and a preparation method and application thereof and relates to the technical field of ceramic materials in order to solve the technical problem that the existing ceramic material is relatively weak in antibacterial ability and relatively poor in health-caser effect. The complex ceramic is mainly prepared from the following raw materials in percentage by weight: 1 to 10 percent of MgO, 2 to 10 percent of SiO2, 5 to 10 percent of MnO2, 1 to 10 percent of Al2O3, 5 to 10 percent of Cr2O3, 5 to 10 percent of ZrO2, 10 to 40 percent of SiC, 1 to 5 percent of TiO2, 0.5 to 2 percent of free carbon, 1 to 5 percent of negative ion powder, 1 to 5 percent of germanite, 2 to 5 percent of pelelith and 5 to 10 percent of kaolin. The complex ceramic provided by the invention is applied to household appliances, so that the household appliances have the functions of household appliances as well as a health-care effect and can radiate far infrared rays and negative ions, and after corresponding household appliances are used for a long time, human metabolism is enhanced, fatigue is eliminated, ageing is resisted, and functions of a human body are improved.

A copper-base alloy material contains Ti (0.4-2.9 wt.%), B (0.2-1.3 wt.%), Sn (0.1-0.9 wt.%), Ce (0.01-0.06 wt.%) and Cu (the balance). Its advantages are excellent antiwear nature, and electric and thermal conductivities, higher tension strength and elastic extreme, proper toughness, lower expandability, easy machining and welding, and sealing performance with resin.

The invention discloses an epoxy resin zinc-rich heavy-corrosion protection powder coating which is prepared from the following raw materials in parts by weight: 40-70 parts of epoxy resin, 3-5 partsof a solidifying agent, 0-35 parts of titanium dioxide, 0-40 parts of barium sulfate, 0.8-1.5 parts of an acrylic acid flow agent, 0.4-2.5 parts of an acrylic acid wetting agent, 0-1.8 parts of benzoin, 0-1.2 parts of stearic acid, 0-5 parts of a flatting agent, 0-1 part of polyethylene wax, 0-1 part of polyamide wax, 0-1 part of a defoamer, 0-1 part of polytetrafluoro-ethylene wax, 0-1 part of acharge regulator, 0-1 part of organobentonite, 0-2 parts of a catalyst and 5-40 parts of zinc powder. The epoxy resin zinc-rich heavy-corrosion protection powder coating provided by the invention hasgood chemical resistance, mechanical performance, leveling performance, storage stability and salt spray resistance and realizes the heavy corrosion protection technical effect.

The invention discloses a positive electrode active material, a positive electrode plate and a lithium ion secondary battery. The positive electrode active material comprises secondary particles formed by aggregation of primary particles, the primary particles are lithium transition metal oxides, and transition metal sites of the lithium transition metal oxides comprise nickel and doping elements;and the Young's modulus E of the primary particles satisfies 175 GPa < = E < = 220 GPa. By adopting the positive electrode active material provided by the invention, the lithium ion secondary batterycan have relatively high energy density and high-temperature cycle performance at the same time.

The invention provides a heat treatment technology for stainless steel workpieces. The heat treatment technology comprises the following steps: quenching, heating a stainless steel workpiece to 930-960 DEG C, keeping the temperature for 2.5-3.5 h, oil-cooling the stainless steel workpiece, and taking out the stainless steel workpiece when surface temperature of the stainless steel workpiece is less than or equal to 110 DEG C; carrying out medium-temperature tempering, putting the quenched stainless steel workpiece into a heating furnace and heating to 400-450 DEG C, keeping the temperature for 8-10 h, taking out the stainless steel workpiece and air-cooling the workpiece to room temperature. According to the stainless steel heat-treatment technology, oil quenching is carried out after heating so as to reduce stress generated during the cooling and avoid deformation and simultaneously enhance surface hardness of the stainless steel workpiece. Through medium-temperature tempering, a tempered troostite is obtained, and high elasticity and yield point and proper toughness are achieved.

The present invention relates to a preparation method of enteric-coated soft capsules. The enteric-coated soft capsules comprise contents and capsule shells. The contents are fish oil or a combination of the fish oil and other components. The preparation method comprises the following steps: coating liquid is added in a process of glue melting of glue skin, vacuum-pumping and pressure maintaining glue melting are conducted, then the vacuum-pumping is conducted to enable glue liquid to be free of bubbles, and the glue liquid is put still at 65-70 DEG C to be subjected to a heat preservation for a standby application; the obtained glue liquid is used to form the soft capsule shells; and the contents are wrapped in the soft capsule shells formed by the glue liquid using a pill pressing machine to prepare the enteric-coated soft capsules. The obtained enteric-coated soft capsules can prevent corrosion of the glue skin by medicinal liquid, increase a shelf life of the products, show no oil leakage and penetration phenomena, increase disintegration time and are full of toughness.

The invention discloses application of a skin care composition in diabetic foot care or sutured wound surface care. The skin care composition is comprised from, in percentage by weight, the followingcomponents: 1%-20% of a film-forming agent, 0.5%-10% of a thickener, 0.5%-10% of a plasticizer, 0.01%-2% of a bacteriostatic agent, 0.01%-2% of a skin-conditioning agent and the balance of solvent. After the skin care composition is applied on the skin, a transparent thin film with suitable tenacity and strength can be formed, the transparent thin film further has good wet fastness, abrasion resistance, water resistance and antibacterial activity, therefore, the damaged skin can be isolated from the outside world, is not prone to be damaged by abrasion or infected by pathogenic bacteria, remains moist and is not prone to chap, and thus damaged skin healing is facilitated; thus a very good effect of protecting diabetic feet and a sutured wound surface can be achieved, a hard-to-heal wound surface of the foot skin of a diabetic patient is prevented, and disease cause development of the diabetic feet is blocked to a certain extent; meanwhile, deterioration of a sutured wound of the sutured wound surface can be prevented, healing of the sutured wound is facilitated, and it is convenient to observe the healing condition of the wound surface.

The invention discloses an art type epoxy resin zinc-rich anti-corrosion powder coating. The art type epoxy resin zinc-rich anti-corrosion powder coating comprises the following raw materials in partsby weight: 40-70 parts of epoxy resin, 3-5 parts of curing agent, 0-35 parts of titanium dioxide, 0-40 parts barium sulfate, 0-1 part of acrylic leveling agent, 0-1 part of acrylic wetting agent, 0-1part of benzoin, 0-1 part of stearic acid, 0-5 parts of flatting agent, 0-1 part of polyethylene wax, 0-1 part of polyamide wax, 0-1 part of defoamer, 0-1 part of polytetrafluoroethylene wax, 0-1 part of electric charge conditioning agent, 0-1 part of organic bentonite, 0-2 parts of catalyst, and 5-40 parts of zinc powder. The art type epoxy resin zinc-rich anti-corrosion powder coating not onlyrealizes the technical effect of anti-corrosion, but also can make a coating layer produce pattern effects of sand pattern, crinkle pattern, hammer pattern, etc., so as to cover the defect caused by unevenness of the substrate surface, therefore, the coating has a very high decorativeness, and is suitable for popularization and application.

A biodegradable magnesium alloy nerve conduit for nerve defect repair has multiple lines of through holes in the tube wall thereof, the through holes in each line are axially arranged along a circular tube at equal distances, and the through holes in adjacent lines are arranged in a staggered way. A method for preparing the nerve conduit includes steps of: (step 1) processing a 45-degree conical surface at one end of a magnesium alloy tube blank, carrying out extrusion, and obtaining a magnesium alloy intermediate tube material; (step 2) obtaining a capillary tube after carrying out multi-pass rolling and drawing on the magnesium alloy intermediate tube material; (step 3) carrying out stress relief annealing on the capillary tube, laser cutting and punching, and obtaining a porous conduit; and (step 4) carrying out acid pickling on the porous conduit, and then carrying out electrochemical polishing treatment, and obtaining the nerve conduit.

The invention discloses a pressure resistant built-up water storing module comprising pressure bearing plate, pressure bearing column and side plate. Pressure bearing plate and side plate form a cube. Pressure bearing plate is sliced with splice plates on which main water-passing hole and auxiliary water-passing hole are provided and the edge of which are provided with sliced circular groove and snaps. Wherein sliced plates are connected via slicing buckle; Side plate is provided with water permeable zone, and the bottom and top of side plate are provided with snap groove. Side plate and pressure bearing plate are connected via snap and snap groove; On main water-passing hole pressure bearing column is provided. Pressure bearing columns of the opposed direction can be dismantled and connected with each other. Pressure bearing column is hollow and frustoconical. The bottom of pressure bearing column and main water-passing hole can be dismantled and connected together. Water storing module adopts pressure resistant pvc based composite plastic and is prepared with PVC, MBS, modified EVA, wood fiber, nano silica,calcium carbonate, talc and glass beads. The pressure resistant built-up water storing module can be thoroughly dismantled and has simple structure, conducive to transportation with low cost. At the same time, module structure and materials have strong pressure bearing capability and long service life.

The invention relates to a grapefruit and egg white icing powder which is composed of the following components by weight: 50%-55% of white granulated sugar, 32%-36% of maltodextrin, 5%-7% of grapefruit powder, 3%-5% of egg white powder, 2%-5% of pregelatinized starch and 0.02%-0.04% of monascus yellow color which are dosed and mixed. A method for preparing grapefruit and egg white icing by the grapefruit and egg white icing powder is simple, convenient and quick. A certain amount of water is added into the grapefruit and egg white icing powder, and the mixture is directly stirred to prepare the grapefruit and egg white icing which is hard in quality, stable in foam, durable and proper in toughness and flexibility. Various flowers and three-dimensional patterns can be made by flower extruding and modeling. The grapefruit and egg white icing powder is attractive in appearance, sweet and sour, has fresh grapefruit taste, is a cake decoration with good color, fragrance, taste and nutrient and has double value of observation and edibleness.