140results about How to "Improves tarnish resistance" patented technology

The invention relates to a multi-layer-color denture and base integrated carving block as well as manufacturing and use methods thereof. The carving block comprises two resin layers with a lower base layer and an upper denture layer. The manufacturing method comprises the following steps: performing color matching on the base layer and the denture layer, performing injection molding, and trimming and forming. According to the method, a user can be freed from a heavy and harmful conventional denture base manufacturing process, and a layer-rich denture and base integrated product conforming to a natural tooth form can be manufactured at the same time in a one-time manufacturing process through a CAD/CAM (computer-aided design/computer-aided manufacturing) technology in the existing dental industry.

The invention discloses nano-SiO2-modified aluminum profile polyester powder coating with high weathering resistance and the preparation method thereof. The nano-SiO2-modified aluminum profile polyester powder coating is characterized in that nano-SiO2 is reacted with hydrolyzed silicane coupling agent; an acrylic acid monomer is subjected to in-situ polymerization with the coupling agent grafted with the nano-SiO2 surface, thus achieving in-situ polymer grafted modification on the nano-SiO2 surface and greatly improving the dispersion stability and the resin compatibility of the nano-SiO2; and the modified nano-SiO2 powder is added into polyester powder coating. The polyester powder coating can be used for electrostatic spraying aluminum profile surface to solve the aging problem of the organic coating of aluminum profile exposed to outdoor UV rays, thus greatly improving the anti-aging performance, tarnish resistance, etc. The weathering resistance of the polyester powder coating is improved by 100 to 250 percent as compared with unmodified polyester powder coating, thus improving the use performance and the use service life of aluminum profile coating.

The invention relates to argentiferous gold-simulating copper alloy and a preparation method thereof and belongs to the technical field of alloy materials. The argentiferous gold-simulating copper alloy aims to solve the technical problems of poor color change resistance and gold-simulating effect of copper alloy in the prior art, and mainly comprises, by weight, 1%-20% of Ag, 0.5%-40% of Zn, not more than 1% of Si, not more than 1% of RE, 0.4-5.0% of color matching agents and the balance Cu. The preparation method includes: melting the raw materials at the temperature of 1200-1300 DEG C, performing annealing treatment at the temperature of 500-600 DEG C, forging and performing hot rolling so that the argentiferous gold-simulating copper alloy is obtained. The argentiferous gold-simulating copper alloy is high in color change resistance and good in gold-simulating effect and has the advantages of capability of achieving apparent color and luster of 14K-18K gold, simple technical process, good processability and easiness in processing.

The invention provides a nontarnishing multi-element nickel, tin and brass alloy and a preparation method thereof. The alloy comprises the following components in percentage by mass: 70.0-75.0% of Cu, 0.1-0.6% of Al, 0.5-1.3% of Ni, 0.7-1.5% of Sn, 0.02-0.2% of Si, and 0.05-0.20% of Mn. The alloy also comprises 0.003-0.01% of Cr, 0.003-0.01% of B, 0.005-0.015% of RE, and the balance Zn, wherein Cr, B and Re account for 0.015-0.03% of the total content. The preparation method comprises the steps of smelting, casting, hot rolling, primary rolling, first intermediate annealing, acid pickling, finish rolling low-temperature annealing, and other processing to obtain the material. The nontarnishing multi-element nickel, tin and brass alloy is high in strength, abrasion and corrosion resistance, and can be widely applied to copper-based decorating materials, water pipes and other copper-based spare parts.

The invention relates to alkaline cyanide-free silver plating electroplating liquid and a silver plating method. The electroplating liquid is composed of the following components including 20 g/L-50 g/L of silver nitrate, 40 g/L-100 g/L of 5,5-dimethyl hydantoin, 70 g/L-100 g/L of potassium pyrophosphate, 0.8 g/L-1.2 g/L of 3,3'-dithiobis-1-propanesulfonic acid disodium salt, 0.10 g/L-0.15 g/L of benzotriazole, 10 mg/L-15 mg/L of N,N'-bi-oleoyl-Ethylenediamine-Sodium Diethyl sulfonate, 0.10 g/L-0.30 g/L of polyethylene glycol and the balance water, wherein due to a pH adjusting agent, the pH value of the system ranges from 8 to 12. By means of the alkaline cyanide-free silver plating electroplating liquid, all the components are matched and work collaboratively, stability is good, the copper replacement resisting performance is high, and the scattering capability of the plating liquid is high; crystal grains of a silver plated layer are fine, the crystal grains are densely and neatly arranged, the surface is flat and bright, glossiness is good, and the color changing resisting capability is high; and the hardness of the plated layer is high, the combining force with a base body is high, and the alkaline cyanide-free silver plating electroplating liquid is suitable for application and popularization.

The invention discloses a silver-zinc zirconium phosphate composite germicide for paper money and a preparation method thereof; the germicide takes laminar zirconium phosphate as a carrier, and is loaded with mono-valence silver ions and zinc ions; the grain size of the germicide is uniform and is smaller than 9 microns; the whiteness and the discoloration durability are high and the antiseptic performance is good; and the germicide is suitable for the field of paper money printing. The manufacturing steps of the germicide are as follows: adding zirconium phosphate powder and soluble zinc salt into a prepared silver ion solution, filtering, washing, drying, burning and crushing the solution after reaction. The method has a simple process and is easy to perform industrial production is free from by-products and has no pollution to the environment.

The invention provides a high-stability water-based silver-plating protective agent. Every liter of the high-stability water-based silver-plating protective agent comprises 40-100 g of octadecanethiol, 4-10 g of trimethyl mercapto phosphate, 100 mg of reduced graphene oxide, 40-100 g of an emulsifier, 10 g of a stabilizer and the balance deionized water. The high-stability water-based silver-plating protective agent adopts the stabilizer and graphene, so that the service life of the protective agent is prolonged, and the corrosion resistance and color change resistance of protected metal are improved; and the surface appearance and performance of the silver-plating layer protected by the protective agent are not affected, a potassium sulfide resistance test of electronic products can be maintained for more than 12 minutes, and the protection time is greatly prolonged.

The invention discloses a highly-color-change-resistant golden brass alloy and preparation method. The highly-color-change-resistant golden brass alloy comprises the following components of Mn, Sn, Ni, Zn, Sr, Ce, B, Si and the balance Cu and inevitable impurities. The preparation process comprises the following steps of casting, hot rolling, cold rolling, intermediate annealing, cold finish roughrolling, cold finish rolling and finished product annealing. The alloy produced by the method is high in golden degree, good in color-change resistance, excellent in hot and cold machining performance, small in deformation resistance, free of precious metal elements and relatively low in cost; the alloy produced by the method is reasonable in component, the golden degree of the alloy is improvedthrough reasonable matching of cheap manganese, nickel, zinc and tin, the zinc content is lower than 20% so that dezincification corrosion can be avoided, through the reasonable combination strontium,cerium, boron and silicon, the process performance can be improved, and the color-change resistance can be improved; according to the alloy, the production process is simple, the production cost is low, the machining performance is good, the golden degree is high, the color-change resistance is excellent in the environment of salt mist, high humidity, synthetic perspiration and the like, and thealloy is suitable for industrial production.

The invention provides a high discoloration resistance and low-cost gold bronze alloy and a preparation method thereof. The high discoloration resistance and low-cost gold bronze alloy comprises the following components of Mn, Al, Ni, Si, Ce, Sr, P and B, and the balance Cu and inevitable impurities. The preparation method comprises the steps of smelting, semi-continuous casting, hot rolling, surface milling, cold rolling, intermediate annealing, cold finish rough rolling, cold finish rolling and finished product annealing. The alloy produced by the method has high gold color, good discoloration resistance performance, excellent hot and cold working properties and small deformation resistance, and does not contain noble metal elements, so that the alloy is relatively low in cost. The alloyhas reasonable components, and the gold degree of the alloy is improved through reasonable matching of cheap manganese, aluminum, nickel and silicon. The reasonable collocation of strontium, cerium,phosphorus and silicon can improve the technological performance and the discoloration resistance. The alloy is low in price of raw materials, simple in production process, environment-friendly, low in production cost, good in processing performance, high in the gold degree, excellent in discoloration resistance performance in environments such as salt mist, high-humidity and artificial sweat, andsuitable for industrial production.

The invention discloses a UV transfer printing wood floor which is mainly composed of a basic wood floor body and an abrasion-resistant surface layer attached to the basic wood floor body. A transfer printing layer is arranged between the basic wood floor body and the abrasion-resistant surface layer. The basic wood floor body is made of one or more layers of solid wood. The surface of the basic wood floor body is provided with wood natural grains or has a pure color. The transfer printing layer is attached to the surface of the basic wood floor body. The abrasion-resistant surface layer is transparent or semitransparent and is attached to the surface of the transfer printing layer. According to the UV transfer printing wood floor adopting the technical scheme, various wood natural grains, stone grains, wood parquet grains, images arousing the art aesthetic feeling and the like are printed to the surface of the wood floor through a UV transfer printing mode, and low-grade quick-growing wood is decorated with decorative materials with a high-grade effect. Accordingly, fast-growing and high-yield plantation is sufficiently utilized, the valuable wood resource is saved, and the requirements for personalized, diversified and hierarchical home decoration are met. The invention further discloses a manufacturing method of the UV transfer printing wood floor.

The invention discloses a preparation method for cyanide-free 18 k gold jewelries. The preparation method comprises the steps of plate making, mold pressing, opening and reversing, alloy mold carrying, drilling, loading, degreasing, primary activation, copper bottoming, secondary activation, gloss copper 1 plating, electrolytic degreasing, ternary activation, gold water preparation, molten copperpreparation, 18 k electroforming, gloss copper 2 plating, demolding, tin bismuth copper removal, distressing, mold carrying, embedding, welding, combination, polishing, cooling, deoiling, electrolyticdegreasing, gold plating, pure water washing, drying, quality inspection, character printing, packing and delivery in sequence; and then, the cyanide-free 18 k gold jewelries are obtained. The preparation method is simple in process and easy to operate, obviously improves the jewelry quality, reduces the gold loss, and contains no cyanide-contained poisonous substance in the preparation process to achieve environmental protection and safety; the hardness and the toughness of the 18 k gold jewelries are prominently improved to preferably guarantee the stability of the jewelries in the wearingprocess; and further, electroforming liquid is excellent in stability, dispersibility and deep plating capacity, can be prepared beforehand for future use, and improves the production efficiency.

The invention provides an artificial brushed nickel appearance and anti-tarnish surface treatment method for a metal base material and a metal decorative assembly obtained by the method. The method provided by the invention comprises the following steps: polishing and drawing the metal base material by virtue of an abrasive tape, adhering a layer of protective film to effectively prevent the drawn metal base material surface from rusting; removing the protective film, removing glue and oil by a vacuum ultrasonic hydrocarbon solvent; carrying out vacuum microwave drying, so that the metal base material is not injured, and no three wastes are discharged; sequentially applying a physical gas-phase deposition layer, an ion glow activation layer, a non-reacting deposition layer and a reacting deposition layer, effectively improving the adhesive force and the appearance chromatism between the coating and the metal base material; and finally, spraying transparent powder. The appearance of the sprayed metal decorative assembly does not change color due to high-temperature baking, so that the antiseptic property, the anti-tarnish property and other properties of the metal base material can be effectively improved.

The invention belongs to the field of antimicrobial material. It aims at improving the liable color change of silver-carried phosphoric titanate. It contains the following steps: using titanic sulfate or titanoxy sulfate as raw material, and mixing urea as adjuvant to prepare solution, the mass ratio of titanic sulfate to urea being 40: 1- 40: 5, titanoxy sulfate to urea being 30: 1- 30: 5; adding block or powder of phosphoric titanate into the solution, heating by water-bath of temperature of 50-90 Deg. C and stirring for 3-6 hours to deposit titanium-contained substance film on the surface of phosphoric titanate; annealing in the air and the temperature of 500-700 Deg. C by 1-4 hours; exchanging silver ion in silver nitrate water solution of a mass ratio concentration of 1-20% in 20-50 Deg. C by 0.5-4 hours to prepare silver-carried phosphoric titanate material, carrying silver mass being 1-10% by mass, annealing the silver-carried phosphoric titanate complex in 600-1000 Deg. C by 0.5-6 hours. The whiteness can amount to over 89%, antibiosis ratio to 99%, it keeping the fine exterior of material, applying extensively to preparing antimicrobial material in plastic, coating, timber and so on.

The invention provides a composite material. The composite material is formed by implementing a chemical transformation treatment for a solid material which is provided with a Ni-P alloy coating, doesn't have coloring caused by the chemical transformation treatment or has less coloring, and has excellent corrosion resistance and discoloring resistance. The chemical transformation treatment is implemented for the Ni-P alloy coating on a substrate via adopting following chemical transformation treatment solution to form a chemical transformation capsula layer. The chemical transformation capsula layer is processed water washing so as to obtain the composite material. The chemical transformation treatment solution comprises main metal elements which comprise Zr and/or Ti and halogen, and pH is in the range of 2.0 to 6.0; the chemical transformation capsula layer comprises the main metal elements in the range of 1mg/m<2> to 30mg/m<2>, phosphorus element and oxygen element respectively in the range of 1mg/m<2> to 100mg/m<2>.

The invention discloses a production process of eugenol for a flavoured product. The production process disclosed by the invention comprises the following steps of: decompressing and distilling by taking clove leaf oil as the raw material, then, adding sodium hydroxide to stir and react, standing to layer, neutralizing a water layer by using sulphuric acid solution to obtain crude carophyllin, adding EDTA-2Na complex metal ion again, and finally, decompressing, distilling and rectifying to obtain the final product, namely eugenol. Compared with the eugenol product produced by using the existing production process, the metal ion content of the eugenol produced by the production process disclosed by the invention is greatly reduced; and the colour change resistant property and the safety property of the product are obviously increased.

The invention relates to paint with high temperature resistance and a preparation method, in particular to two-component paint with high temperature resistance and a preparation method. The two-component paint with high temperature resistance is prepared from a first component and a second component, wherein the first component is prepared from phenyl methyl silicone resin, a wetting dispersant, a copper chromite black pigment, mica powder, barium phosphonate, zinc phosphate, glass powder and n-butyl acetate in proportion; the second component is prepared from gamma-aminopropyltriethoxysilane and absolute ethyl alcohol in equal proportion through mixing, the two components in a ratio being (100:1)-(105:1) in parts by weight are mixed, and the two-component paint with high temperature resistance is obtained. The temperature resistance, the discoloration resistance and the alternate cooling and heating resistance of the two-component paint with high temperature resistance are greatly improved, and adhesive force and corrosion resistance of the two-component paint with high temperature resistance are excellent.

The invention discloses a process of ultrasonic wave electroplating of copper foil. An electroplating solution is prepared, and cerous oxalate is added into the electroplating solution; ultrasonic cleaning with deionized water is carried out before electroplating; during electroplating, the cathode current density is 2.5A/dm3; the electroplating solution is oscillated and stirred by ultrasonic wave of 700-1200 w and 20-35 KHz. The process of the invention adopts ultrasonic wave stirring, which increases the current density, reduces concentration polarization, improves brightness, enables easy escape of hydrogen at the cathode surface, reduces burrs and pin holes, and obtains an electroplating layer with finer and uniform crystal particles.

Disclosed are a method for extracting a biomarker for diagnosing pancreatic cancer, a computing device therefor, a biomarker for diagnosing pancreatic cancer and a device for diagnosing pancreatic cancer including the same. More particularly, disclosed are a method for extracting a biomarker for diagnosing pancreatic cancer using genes specifically expressed in pancreatic cancer patients or microRNAs obtained from blood or tissues paired with the genes, a computing device therefor, a biomarker for diagnosing pancreatic cancer and a device for diagnosing pancreatic cancer including the same.

The invention discloses a fastness rose gold target and a preparation method thereof. The fastness rose gold target contains Au, Ir and Cu. According to the fastness rose gold target, the iridium (Ir) is used for replacing an Ag element one of main elements in rose gold to form Au-Ir-Cu series rose gold. According to the fastness rose gold target, the wear resistance and the oxidation resistance of a film layer are improved, the fastness effect is effectively improved, and the service life and the use effect of a decoration are prolonged.