148results about How to "Adjust hardness" patented technology

The invention discloses an epoxy acrylate modified waterborne alkyd resin and a preparation method and an application thereof. The method comprises the steps: firstly, synthesizing a waterborne alkyd resin from a polyol, a polybasic acid and an oil monomer by adopting a dehydration condensation reaction; then carrying out an epoxy resin ring opening reaction to graft onto the waterborne alkyd resin so as to modify the waterborne alkyd resin; followed by carrying out free radical solution polymerization of acrylic soft and hard monomers with the modified alkyd resin, and modifying the alkyd resin by using acrylic ester; and finally pumping out a part of a polymerization solvent to neutralize the obtained waterborne alkyd resin, adding a cosolvent, and dispersing the alkyd resin to prepare an aqueous dispersion by adopting a high-speed disk dispersion machine and with water as a dispersion medium. In the addition to retaining own excellent characteristics, the modified alkyd resin also has good dryness, adhesive power and corrosion resistance of epoxy resin and the acrylic resin advantages of excellent drying, water resistance, chemical medicine resistance, high hardness, good weathering resistance and the like, and effectively improves the alkyd resin performance of water resistance, weather resistance and the like.

The invention relates to an iron-based high-titanium wear-resistant surfacing flux-cored welding wire. Among a plurality of types of the prior wear-resistant surfacing welding wires and alloys, some alloys have favorable wearing resistance, and some alloys have great brittleness, lower toughness and easy cracking and are not suitable for the existence of low-impact grinding wear working condition.The iron-based high-titanium wear-resistant surfacing flux-cored welding wire comprises a low-carbon steel ladle clad and core powder as well as the following alloy elements in percentage by weight:1.0-3.0 C, 1.0-12.0 Ti, 0.5-9.0 V, 0.1-1.5 Si, 0.2-2.0 Mn, 0-3.0 B, 0.00-0.10 RE, 0-13.0 Cr, 0-1.0 Mo, 0-1.0 W, 0-2.0 Ni, 0-0.5 Nb and 0-0.5 Zr. The iron-based high-titanium wear-resistant surfacing flux-cored welding wire realizes the wear-resistant performance of the alloys mainly by carbides and borides formed by the alloy elements of C, Ti, V, and the like as well as a small amount of B element and adjusts the combination of the elements of C, Ti, V, Si, Mn, B, and the like to adjust the alloy hardness, enhance the toughness and lower the crack sensitivity.

The invention discloses powder metallurgy high-speed steel and a preparation method thereof. The method is simpler than the existing powder metallurgy high-speed steel preparation method, steps of high-speed steel mother alloy smelting, atomization for making powder and hot isostatic pressing are omitted, great equipment investment is not needed and the production cost of powder metallurgy high-speed steel is reduced. The impurity content of the powder metallurgy high-speed steel prepared by adopting the method provided by the invention is low and the using performance is excellent. The powder metallurgy high-speed steel provided by the invention is prepared through the steps of 1) preparing powder mixture: weighing raw materials according to set components and proportioning ratio, and mixing and ball-milling the raw materials in a roller-type ball mill to obtain the powder mixture; 2) molding: molding the powder mixture into pressed blanks through cold isostatic pressing; 3) sintering: sintering the pressed blanks in a vacuum or inert gas atmosphere by adopting a hot-pressing sintering technology, heating the pressed blanks to 1100-1250 DEG C during sintering, preserving heat for 30-90 minutes and keeping sintering pressure to be 10-40Mpa; 4) hot forging; 5) heat treatment.

A vibration damping foam rubber product with excellent vibration damping performance and antiageing nature is proportionally prepared from three-element ethylene propylene rubber, filler, softening agent, sulfurizing system and foaming system through pugging, sulfurizing at 140-180 deg.C for 5-10 min for primary sulfurizing-foaming to shape, and sulfurizing at 120-180 deg.C for 10-30 min for secondary sulfurizing-foaming to fixate its shape.

The invention discloses a UV (Ultraviolent) deglossing paint and a preparation method thereof. The deglossing paint contains the following components by weight percent: 10 to 20% of UV resin, 3 to 8 % of light initiator, 15 to 25% of UV monomer, 5 to 20% of deglossing powder or deglossing slurry, 30 to 55% of solvent, 0.3 to 1% of dispersing agent and 0.4 to 1% of organosilicon leveling agent. The method comprises the following steps of: dispersing the light initiator, the dispersing agent and the organosilicon auxiliary into the solvent in advance, then adding the deglossing powder or the deglossing slurry, uniformly dispersing the solvent added with the deglossing powder or deglossing slurry to the fineness smaller than 25 mum, and finally adding and uniformly dispersing the UV resin and the UV monomer. In the formula provided by the invention, the hardness and brittleness of a paint film are regulated by controlling the type and amount of the UV monomer and the UV resin, and the paint film has good hardness and becomes brittle hardly. According to the invention, the solvent and the dispersing agent are firstly used to disperse the deglossing powder uniformly, thus avoiding the interaction of the deglossing powder and resin components; and since the deglossing powder is uniformly distributed in the paint film, the paint film is basically free from the floating phenomenon.

The invention relates to an aeroengine case seam allowance size repairing method. The porosity and hardness of a coating and the content of oxides in the coating can be effectively adjusted by controlling the plasma spraying power and the heating process of spraying powder during flying, and heat stress of the coating is reduced. The hardness and thermal expansion coefficient of the prepared nickel-aluminum coating are equivalent with those of a case, the bonding strength of the coating is far higher than the stress strength of a case seam allowance under the given working condition, and the use working condition of the aeroengine case can be met.

The invention provides a UV curing resin. The UV curing resin comprises the following raw materials: polycaprolactone glycol, a polyhydroxy monomer, hydroxypropyl polydimethylsiloxane, aliphatic diisocyanate, hydroxy-terminated acrylic ester, a catalyst and a polymerization inhibitor. The UV curing resin is aliphatic polyfunctional urethane acrylate, and the backbone structure of the resin contains an internal cross-linked structure formed by the polyhydroxy monomer and the aliphatic diisocyanate; as the aliphatic diisocyanate is used, the internal cross-linked structure can not enable a paint film to be fragile while improving the hardness of the paint film; through reaction between the hydroxypropyl polydimethylsiloxane and the aliphatic diisocyanate, a siloxane structure is introduced into the backbone of the UV curing resin, so that the UV curing resin has excellent light transmittance. The invention also discloses a preparation method for the UV curing resin, as well as a UV curing coating prepared from the UV curing resin, and the UV curing coating also has high abrasion resistance and excellent light transmittance.

The invention discloses a high-transparency polyurethane elastomer, which is of a system of three components, namely a prepolymer component, a polymer component and a chain extender component, wherein in the prepolymer component, diisocyanate reacts with polyalcohol to generate a prepolymer, the NCO of which is 6 to 10 percent, the diisocyanate is preferably selected from toluene diisocyanate 80 (TDI-80), and the polyalcohol is polyepoxy propane ether polyalcohol, the number average molecular weight of which is in a range of 400 to 3,000 and the functionality of which is 2; and the polymer component is prepared from polyepoxy propane ether polyalcohol, catalyst and anti-ageing agent, wherein the molecular weight of the polyepoxy propane ether polyalcohol is 1,000 to 5,000, and the functionality of the polyepoxy propane ether polyalcohol is 2 or 3. When the product is produced, the temperatures of the polymer component and the chain extender component are controlled at 30 +/- 5 DEG C, the polymer component and the chain extender are mixed in a certain ratio and stirred uniformly, then the polymer component and the chain extender are mixed with the prepolymer component in a certain ratio, and the mixture is placed and cured for 20 to 30 minutes at the temperature of between 70 and 80 DEG C to obtain a product with excellent abrasion resistance and impact resilience. The high-transparency polyurethane elastomer is mainly used for manufacturing high-elasticity ice skate wheels or skateboard wheels.

The invention relates to an acidic and transparent silicone weather-resistant sealant for construction, and belongs to the technical field of adhesives. The acidic and transparent silicone weather-resistant sealant is prepared from the following components in parts by weight: 50-150 parts of hydroxyl terminated polydimethylsiloxane, 20-140 parts of methyl terminated polydimethylsiloxane, 10-60 parts of fumed silica, 5-40 parts of a cross-linking agent, 0.05-0.5 part of a catalyst and 0.05-5 parts of a composite anti-yellowing agent. The acidic and transparent silicone weather-resistant sealant has the advantages of high strength, good adhesive performance, excellent weather resistance, quick crosslinking curing at room temperature and the like, and can be widely applied to weather-resistant sealing of glass curtain walls, glass daylighting roofs and other constructional engineering.

The invention discloses a medicinal implant and a preparation method thereof, and relates to the fields of medicinal biology and material processing. The medicinal implant comprises an implant and a coating. The medicinal implant is characterized in that: the tantalum coating is coated on the surface of the implant, and the tantalum coating is made of one of tantalum elemental material and tantalum alloy material or tantalum/ceramic composite coating material. The preparation method comprises the following steps of: performing sandblast pretreatment and cleaning on a to-be-coated area of the implant by adopting a sandblast apparatus; and then coating the tantalum coating to the to-be-coated area of the implant by adopting a plasma coating device. The medicinal implant has the advantages of good biocompatibility, simple preparation process, high production efficiency, low production cost, wide matrix selection range, good process controllability, low influence of matrix tissues, high coating roughness, high thickness and wide porosity.

The invention relates to the field of chemical industry and new materials, in particular to aqueous nano zirconia particle paint and a method for preparing a paint film thereof. A preparation method of the aqueous nano zirconia particle paint comprises the steps of: with nano zirconia crystal particles as raw materials, modifying organic amino groups on nano particles with an amino silane coupling agent, dispersing the modified nano zirconia crystal particles in water, adjusting a pH value to acquire a transparent nano zirconia aqueous dispersion, and further adding aqueous double-functional groups or multi-functional groups of epoxy compound and a wetting agent to obtain the aqueous nano zirconia particle paint. The method for preparing the paint film of the aqueous nano zirconia particle paint comprises the steps of: coating the aqueous nano zirconia particle paint on the surface of a plastic substrate through dip coating, spin coating and spray finishing, and thermally treating at lower temperature to obtain an organic molecule-bridged nano zirconia particle film, wherein the thickness of the paint film can be adjusted through coating multiple times. The aqueous nano zirconia particle paint in the invention has simple and convenient preparation methods and good environmental-protection performance, and the acquired paint film has high zirconia content, good transparency, high refractive index and outstanding mechanical property and can be used as an optical paint film and a scratch-resistant paint film on the surface of the transparent plastic substrate.

The invention relates to a three-component polyurethane elastomer composition with high wear resistance, which comprises a prepolymer component, a polymer component and a chain extender component, wherein diisocyanate reacts with polyol to obtain a prepolymer of which the NCO content is 6%-10%, wherein the diisocyanate is preferably TDI-80, and the polyoxypropylene polyol of which the molecular weight is 400-3000 and the functionality is 2 is adopted; the polymer component is prepared from polyoxypropylene polyol of which the molecular weight is 1000-5000 and the functionality is 2 or 3, reinforcing agent, catalyst and anti-aging agent; and in the process of production, the temperature of the polymer component and the temperature of the chain extender component are controlled at 30+/-5 DEG C, after the polymer component and the chain extender component are mixed and stirred uniformly according to a certain proportion, the mixture is mixed with the prepolymer component according to a certain proportion, the mixture is placed and solidified at 70-80 DEG C for 20 minutes, and the obtained product has excellent wear resistance and impact resilience. The invention is mainly used for manufacturing high-elastic skate wheels or skateboard wheels.

The invention relates to antistatic organosilicon gel used for a heat-conducting gasket and a preparation method of the organosilicon gel. The organosilicon gel comprises an A component and a B component in a weight ratio of 1:1. The A component comprises following raw materials by weight: 95-99.84 parts of a basic material, 0.1-1 part of a catalyst, 0.05-2 parts of an adhesive and 0.01-2 parts of an antistatic agent. The B component comprises following raw materials by weight: 84-94.9 parts of the basic material, 5-15 parts of a cross-linking agent and 0.1-1 part of an inhibitor. The organosilicon gel prepared by the invention has good fluidity. After sulfuration, the organosilicon gel has excellent adhesive property, holding power and antistatic property.

The invention discloses an iron-doped zirconium oxide polishing solution, and relates to the technical field of preparation of polishing materials. The iron-doped zirconium oxide polishing solution is prepared from water-soluble inorganic zirconium salt, soluble trivalent ferric salt, alkali, zirconium carbonate, additives and a pH value modifier. The method comprises the preparation steps of material preparation, symbiotic solution preparation, symbiotic precipitate preparation, washing, drying, roasting, grinding and stirring dispersion; the method has the characteristics that the cutting rate is good and no obvious defects are generated on the surface of a polished material; the iron-doped zirconium oxide polishing solution prepared by using the method is suitable for the processing field of high-grade optical instruments, and particularly can be applied to polishing flexible glass.

The invention relates to special handwork plasticine for English course, which is used for showing English characters or words to be learned on a blackboard in forms of plasticine characters during English teaching at schools and kindergartens so as to enhance the teaching interestingness. The special handwork plasticine for English course is prepared from the following raw materials in parts by weight: 30 parts of resin clay, 10 parts of pectin, 0.5 part of bone glue, 5 parts of aloe gel, 40 parts of modified corn starch, 10 parts of glutinous rice flour, 5 parts of neodymium iron boron magnetic material powder, 3 parts of almond oil, 1 part of palm oil, 1 part of chamomile essential oil, 0.2 part of pericarpium granati extract, 0.5 part of refined salt, 3 parts of calcite powder, 20 parts of flour, 0.5 part of calcium stearoyl lactylate, 0.2 part of sodium tripolyphosphate, 0.2 part of polymethylphenyl siloxane liquid, 5 parts of kieselguhr, 0.5 part of food coloring and 10 parts of water. In the invention, the English characters or words to be learned are shown on the blackboard in forms of plasticine characters so as to enhance the teaching interestingness and realize the characteristics of environmental protection, no toxin, harm or crack, antibacterial property, good forming property, moderate hardness and convenience in demoulding.

The invention discloses a method for manufacturing a multi-scale structure aluminum/stannum-based bearing alloy, which is characterized in that coarse-crystalline raw mixed powder with the same components is added to mechanical alloying powder having a nano-phase composite structure. The method specifically comprises the steps that: high-purity Al and Sn powders with the grain size about 200 meshes are subjected to high energy ball milling based on certain mass ratio of the Al powder to the Sn powder under the protection of argon, so as to prepare Al-Sn alloy powder with the nano-phase composite structure; the Al and Sn powders are commonly mixed according to the same mass ratio above to obtain the raw mixed powder; the Al-Sn alloy powder is uniformly mixed with the raw mixed powder; the mixed powder is subjected to cold pressing molding to obtain a green compact; and the green compact is sintered under vacuum to prepare the Al-Sn bearing alloy with excellent tribological properties. The aluminum/stannum-based bearing alloy of the invention has a multi-scale structure, remarkably improved density and abrasive resistance, increased adjustable extent of hardness and high matching degree with shafts.

The invention belongs to the technical field of special welding and relates to an electroless welding rod. The electroless welding rod is composed of a welding agent pipe, welding agents, an ignition cap, a clamping end and a sleeve, wherein the welding agents are loaded in the welding agent pipe, one end of the welding agent pipe is connected with the clamping end, the other end of the welding agent pipe is inserted into the ignition cap to be encapsulated, and the welding agent pipe and the ignition cap are arranged in the sleeve with one end closed. The welding agents include, by mass, 58.0%-70.0% of CuO powder, 13.0%-18.0% of Al powder, 5.0%-6.7% of Si-Ca alloy powder, 5.0%-6.3% of CaF2 powder, 0.7%-1.5% of B powder, 4.8%-9.5% of Fe powder, and 0.4%-1.0% of Mn powder. The welding rod is small in size and convenient to carry, materials for manufacturing are easy to obtain, price is low, welding is easy, and welding of various materials such as ordinary steel, stainless steel and copper can be realized.

The invention provides an aerogel heat insulation sheet which comprises an aerogel layer and a glue layer coating the outer surface of the aerogel layer; the glue layer covers the whole outer surfaceof the aerogel layer and is prepared from the following raw material components in part by weight: 0.03-1.5 parts of carbon powder, 0.5-5 parts of glass fiber powder, 0.2-5 parts of a flame retardantand 4-35 parts of a structural adhesive. The aerogel heat insulation sheet provided by the invention has the benefits that as the glue layer covers the whole outer surface of the aerogel layer, powderon the surface of an aerogel material is fixed in the glue layer, so that the problem of falling-off of the powder on the surface of the aerogel material is solved. Therefore, the aerogel heat insulation sheet can be applied to the automobile field, and is used as a heat insulation material for an automobile battery, and the problems of pollution and damage to an automobile product due to powderdrop of the aerogel material are effectively solved.

The invention discloses a method for preparing cross-linked anti-fatigue and anti-wear polyurethane rubber. The cross-linked anti-fatigue and anti-wear polyurethane rubber comprises the following components in percentage by mass: 65-70% of polytetramethylene glycol, 6-10% of cyclic polypropylene oxide ether triatomic alcohol, 14-20% of toluene diisocyanate, 5-8% of 1,5-naphthalene diisocyanate, 1-3% of di-o-chlorodiphenylamine methane, 0.5-1.5% of trimethylolpropane, 0-0.5% of carbon black and 1-2% of molybdenum disulfide. The rubber has the advantages of high wear resistance, good resilience, good low-temperature resistance, high tensile strength, predominant hydrolysis resistance, good adhesion to metal, shock resistance and relatively good anti-fatigue performance.

The invention provides a ceria-zirconia oxide nanometer material dispersed in water medium. Water is used as a dispersion medium, solid solution nano-particles prepared from cerium oxide and zirconium oxide are used as dispersion-phase sol, wherein the nano-particle is a single crystal with the nanoscale being 2-8nm and is singly dispersed in the water medium; the mass of the CexZr(1-x)O2 nano-particles is 0.1-30% of the volume of the nanometer material sol, the content of the CexZr(1-x)O2 nano-particles can be further increased through evaporation and concentration or water can be added freely for dilution. The prepared ceria-zirconia oxide nanometer material has the nano-meter characteristics of remarkable small size effect and surface effect and the like, and can be used for an oxygen storage/release material of a three-way catalyst for automobile exhaust gas purification, a carrier of a supported catalyst or an assisted-catalysis material, optical glass, semiconductors, LED ultra-precision polishing materials, a surface layer thermal barrier or a wear-resistant material of a special plate, a catalytic promoter of a fuel cell anode, and an optimal property modifying agent for hydrogen storage, sensing, luminous and ceramic materials and the like.