69results about How to "Good bath stability" patented technology

A cationic electrodeposition coating composition containing (A) an acrylic resin obtained by subjecting a mixture of 10 to 60% by weight of a hydroxyl group-containing acrylic monomer (a), 5 to 35% by weight of an amino group-containing acrylic monomer (b), 5 to 55% by weight of an aromatic vinyl monomer (c) and optionally another acrylic monomer (d) to a radical copolymerization reaction; (B) a hydroxyl group-containing acrylic resin-modified epoxy resin obtained by reacting 65 to 95% by weight of a resin composition consisting of 10 to 90% by weight of an epoxy resin (e) and 90 to 10% by weight of a hydroxyl group-containing acrylic resin (f) with 5 to 35% by weight of an amine compound (g); (C) a aliphatic and/or alicyclic blocked polyisocyanate compound, and (D) a bismuth compound component, a mixing ratio of the components (A), (B) and (C) being such that the component (A) is in the range of 40 to 90% by weight, the component (B) is in the range of 5 to 55% by weight and the component (C) is in the range of 5 to 40% by weight based on a total weight of solid contents in the components (A), (B) and (C), the component (D) being contained in such an amount as to be in the range of 0.01 to 10 parts by weight as a bismuth content per 100 parts by weight of a resin solid content in the electrodeposition coating composition.

This invention provides a cyanide-free silver-electroplating solution, which comprises: silver-containing organic or inorganic salt 1-200 g/L, purin coordination agent 1-800 g/L, supporting electrolyte 1-200 g/L, pH regulator 0-550 g/L, and additive system. The preparation method comprises: uniformly mixing the above components to prepare the cyanide-free silver-electroplating solution, and adjusting the temperature to 10-60 deg.C. Compared with the traditional formula, the cyanide-free silver-electroplating solution in this invention has such advantages as low or no toxicity, and high stability. Silver ions have a very low displacement rate with copper, nickel, iron, aluminum, chrome, titanium and alloy matrices. The work piece to be plated does not need preliminary silver plating or silver dipping. The silver-electroplating layer has such advantages as high adhesiveness and high shinness, and can be used in decorative and functional electroplating fields.

Belonging to the field of plating solutions, the invention relates to a potassium chloride-type galvanizing plating solution and its preparation method. With water as the solvent, the plating solution of the invention is composed of the following components: zinc chloride at a concentration of 50-80g/L, potassium chloride at a concentration of 180-280g/L, boric acid at a concentration of 30-40g/L, a softening agent at a concentration of 6-10mL/L, a brightener at a concentration of 0.1-0.4mL/L, and a proper amount of a conditioning agent. The plating solution prepared by the method of the invention is characterized by fast lightening speed, good leveling, high temperature resistance, and fewer decomposition products.

The invention discloses a copper seed etching solution used for wafer level package. The etching solution comprises the following components, 40-60g/L of hydrogen peroxide, 5-35g/L of inorganic acid,5-35g/L of organic acid, 1-30g/L of copper ions, 1-2g/L of chloride ions and 1-2g/L of surface active agents according to the concentration proportion. The components are mixed in proportion, the mixing reaction temperature is between 30 DEG C and 50 DEG C, the reaction time is 1s-400s, and the copper seed etching solution is formed after mixing. Chelating agents formed by mixing the hydrogen peroxide and the inorganic acid and the copper ions can be subjected to chelation to form water-soluble complexes, so that equilibrium is reached; and the chloride ions play a role in maintaining the PH value of a system in the solution, maintains charge balance of the system in the etching process and prolongs the service life of the etching solution. The copper seed etching solution has the characteristics of being stable in performance, suitable for superfine circuits, small in lateral erosion and hardly corrosive to copper and aluminum.

Disclosed is an electroless palladium plating solution which can form a plating layer having excellent soldering properties onto electronic components and the like and excellent wire bonding properties. The electroless palladium plating solution comprises a palladium compound, an amine compound, an inorganic sulfur compound and a reducing agent, wherein a combination of hypophosphorous acid or a hypophosphorous acid compound and formic acid or a formic acid compound is used as the reducing agent, and wherein the palladium compound, the amine compound, the inorganic sulfur compound, the hypophosphorous acid compound, and formic acid or the formic acid compound are contained in amounts of 0.001 to 0.1 mole/l, 0.05 to 5 mole/l, 0.01 to 0.1 mole/l, 0.05 to 1.0 mole/l and 0.001 to 0.1 mole/l, respectively. The electroless palladium plating solution is characterized by having excellent soldering properties and excellent wire bonding properties.

In one embodiment, the invention provides a composition useful for passivating a metal surface, in particular a zinciferous surface, comprising, preferably consisting essentially of, most preferably consisting of water and:

• • (A) dissolved phosphate ions;
  • (B) dissolved trivalent chromium ions;
  • (C) dissolved anions of at least one complex fluoride of an element selected from the group consisting of Ti, Zr, Hf, Si, Sn, Al, Ge and B; preferably Ti, Si and/or Zr;
  • (D) an optional component of dissolved free fluoride ions;
  • (E) organic acid inhibitor, preferably comprising quaternary ammonium compounds; and, optionally
  • (F) a pH adjusting component; and
  • optionally organic hydroxyl acids.

The invention relates to a multipurpose high weather resistant acrylic acid electrophoretic paint and a preparation method thereof. The paint comprises two components, and is produced from high weather resistant acrylic acid modified emulsion and weather resistant color paste at a ratio of 8:1. The high weather resistant acrylic acid modified emulsion comprises following ingredients, by weight: 33 to 39 portions of fluorine-containing cationic acrylic acid modified resin, 14 to 16 portions of blocked aliphatic isocyanate curing agent, 0.8 to 1 portion of a neutralizer and 44 to 52.2 portions of deionized water. The weather resistant color paste comprises following ingredients, by weight: 15 to 18 portions of acrylic acid grinding resin, 1 to 2 portions of a surfactant, 42 to 50 portions of deionized water and 34 to 38 portions of a pigment filler. Fineness of the weather resistant color paste is 15um or less. The paint of the invention is suitable for colorized, white and grey systems. Appearance of coatings is flat, smooth and bright after one time of electrophoretic painting. Yellowing resistance, mechanical properties, coating liquid stability, acid resistance, alkali resistance and weather resistance of the coatings are excellent.

The invention discloses a method for preparing a nichrome composite coating in environment-friendly trivalent chromium plating solution. A specific-content composite coordination agent is added into basic plating solution containing chromic chloride, nickel sulfate and nickel chloride, so that nickel and chromium are co-precipitated on the surface of a metal, and the nichrome composite coating with flat surface and firm combination with a base material is prepared. The method has the advantages that: the prepared nichrome composite coating has the thickness of 30-210 micrometers; compared with a chromium coating, the nichrome composite coating has higher rigidity, high corrosion resistance and excellent decoration performance; and the plating solution can be recycled to contribute to protecting environment.

The invention relates to a solution for chemically plating nickel on the surface of a non-catalytic active material and a plating process for the solution, and belongs to the technical field of chemical nickel-plating. The solution comprises liquor A, liquor B, liquor C and/or liquor D, wherein the liquor A comprises a water-soluble nickel salt and a buffer agent; the liquor B comprises a reducing agent, a complexing agent, a buffer agent, a stabilizer and a surface wetting agent; the liquor C comprises the water-soluble nickel salt and the complexing agent; and the liquor D comprises the reducing agent and the stabilizer. The plating process for the solution comprises the following steps: preparing the liquor A, the liquor B and a diluent; uniformly mixing the liquor A, the liquor B and the diluent to obtain a mixture, regulating the pH value of the mixture to 7.0-8.0, heating the mixture to a temperature of 82-88 DEG C, and carrying out primary plating by using an iron material as an initiator; filtering plating liquor after carrying out primary plating; recycling filtrate for next-time plating, feeding plating liquor obtained by the next-time plating into the liquor C and the liquor D, and recycling the plating liquor. According to the solution and the plating process thereof, the combination and the process design are reasonable, generation and emission of waste liquor can be greatly reduced, and the utilization rate of the plating liquor can be increased.

The invention discloses a chemical copper plating solution which comprises 10-20 g/L copper sulfate, 5-10 g/L potassium nitrate, 5-30 g/L potassium sodium tartrate, 5-30 g/L sodium ethylene diamine tetracetate, 5-50 g/L sodium hydroxide, 5-20 g/L sodium carbonate, 0.5-2 g/L ferrous sulfate, 5-50 g/L formaldehyde, 5-50 g/L methanol and the balance of deionized water. The invention has the advantages of reasonable formula, high stability, fewer impurities, high speed and high efficiency; and the coating thickness can reach higher than 20 mu m.

The invention provide cyanide-free sulfite Au-Cu alloy electroplating solution. The Au-Cu alloy electroplating solution comprises sulfite gold salt, copper sulfate, sulfite, HEDP and potassium sulfate; sulfite is a main coordination agent of Au; HEDP is an auxiliary coordination agent of Au and a main coordination agent of Cu; and the adding of HEDP can improve the electrochemical polarization so as to improve the plating layer quality and to improve the stability of sulfite gold salt. The Au-Cu alloy electroplating solution is applied to plate an Au-Cu alloy on a metal surface by using a pulse electroplating method. The plating solution is excellent in stability; an obtained plating layer only contains gold and copper elements; the surface of the plating layer is fine and uniform, low in porosity, excellent in levelness and free of cracks; and the plating layer is high in hardness and excellent in bonding force and corrosion resistance.

The invention relates to preparation of fluorine-containing organosilicone modified anti-graffiti paint, in particular to preparation of organosilicone polyester modified cyclopropyl resin. The resin,namely cationic resin, can be used in both aqueous paint and electrophoretic paint, plays an anti-graffiti self-cleaning role in the electrophoretic paint, and is prepared from a fluorine-silicon modified emulsion and high-performance color paste in a ratio of 6:1. The preparation has the advantages that paint products have high storage stability; the paint has high salt spray resistance, high weather resistance and high functionality after electrophoretic coating, and is applicable to painting of kitchens and places with high self-cleaning requirements; the paint is water-based two-componentanti-graffiti electrophoretic paint, and is convenient to apply, environmentally friendly and safe to use; the surfaces of boards are smooth and bright, the functionality is high, and the stability of tank liquor is also high; coatings have high mechanical property, acid-alkali resistance, weather resistance and salt-pray resistance.

The invention discloses trivalent chromium electroplate liquid and a preparing method thereof. The trivalent chromium electroplate liquid comprises, by concentration, 0.2-0.35 mol/L of hexahydrate chromium trichloride, 0.25-0.35 mol/L of sodium gluconate, 2.0-4.5 mol/L of glycine, 0.1-0.15 mol/L of aluminum sulfate, 0.002-0.004 mol/L of dodecyl sodium gluconate, 0.4-0.8 mol/L of a complexing agent, 15-20 ml/L of stabilizer and the balance solvent water. The stabilizer is a water solution comprising 2-3 mol/L of methyl alcohol, 2-3 mol/L of sodium sulfite and 1-2 mol/L of ferrous sulfate. Compared with the prior art, the electroplate liquid is stable in performance and long in service life, and the quality of a coating is good. Meanwhile, the preparing method is simple, operation is easy, and very good application prospects and high using value are achieved.

The invention relates to a methanesulfonic acid tin-plating solution. The methanesulfonic acid tin-plating solution comprises 10-40 g/L of Sn2+, 1-5% of methanesulfonic acid, 0.5-15% of a compound antioxidant and 0.5-4% of a grain refiner, wherein the compound antioxidant comprises a main antioxidant body and an auxiliary antioxidant body; the main antioxidant body is prepared from one or more of phenol, catechol, resorcinol, hydroquinone and carboxyl, amidogen, nitro and sulfonate group substitutes thereof; and the auxiliary antioxidant body is prepared from (2R, 3S)-2-(3,4- dihydroxy phenyl)-3,4-dihydro-2H-benzopyran-3,5,7-triol and (2S,3R)-2-(3,4-ihydroxy phenyl)-3,4-dihydro-1(2H)-benzo-3,5,7-triol3-(3,4,5-trihydroxybenzoic acid). The tin-plating solution contains the compound antioxidant, tin slurry in the plating solution can be effectively reduced, and meanwhile after the grain refiner is added, a tin-plated plate with a coating having excellent quality can be obtained.

The invention provides cation-modified epoxy resin, a modified epoxy resin polymer, emulsion and a production method thereof, paint and application. The cation-modified epoxy resin comprises an epoxyresin compound, an alkaline catalyst, an amine compound and a terminal amino butyronitrile copolymer. The modified epoxy resin polymer comprises the cation-modified epoxy resin, an isocyanate curing agent, an epoxy resin compound, an alkaline catalyst, acid and an amine compound. The emulsion comprises purified water, acid, cation-modified polybutadiene epoxy resin, the modified epoxy resin polymer and deionized water. According to the application of the paint, the paint is used for cathode electrophoretic painting. According to the cation-modified epoxy resin, the modified epoxy resin polymer, the emulsion and the production method thereof and the paint, the paint has the advantages that the water resistance is good, the VOC content is low, the leveling appearance is good, throwing poweris high, the sharp edge anti-corrosive property is high, adhesion between the paint and a base material is good, the anti-impact performance is good, and the like.

The invention discloses a chemical nickel plating solution with high corrosion resistance and stability on the surface of an aluminum alloy and a preparation method and application of the chemical nickel plating solution. The chemical nickel plating solution is composed of deionized water, main salt, a reducing agent, a complexing agent, a buffering agent, a stabilizer and a brightener. The main salt is nickel sulfate, the reducing agent is sodium hypophosphite, the complexing agent is composed of glycine and lactic acid, the buffering agent is composed of sodium tetraborate and succinic acid,the stabilizer is composed of cobalt nitrate and potassium iodide, and the brightener is polyethylene glycol. An environmental-friendly chemical nickel plating system with high corrosion resistance and high stability and a simple and efficient pretreatment process are developed, so that the process flow is simplified, the production cost is reduced, and the corrosion resistance of the aluminum alloy is greatly improved.

The invention discloses a combined titanium anode for hexavalent chromium electroplating. The combined titanium anode comprises a titanium base noble metal oxide anode and a titanium base base metal oxide anode arranged on a conducting bar; a titanium base noble metal oxide anode coating layer consists of Ta2O5, IrO2-Ta2O5, IrO2-Ta2O5-SnO2 and IrO2-SnO2 from inside to outside; and a titanium base base metal oxide anode coating layer is PANI-doped PbO2. A preparation method of the combined titanium anode for hexavalent chromium electroplating comprises the following steps: the coating layers are firstly prepared for the titanium base noble metal oxide anode and the titanium base base metal oxide anode, and are combined to obtain the combined titanium anode. The combined titanium anode is high in electrocatalytic activity and corrosion resistance, can work under high current density in the hexavalent chromium electroplating production, generates no anode mud, and is long in service life.

The invention discloses a zero emission type chemical nickel plating liquid. In the nickel plating liquid, a used main salt and reducing agent is nickel hypophosphite, an auxiliary reducing agent is hypophosphorous acid, and other complexing agent, stabilizer, buffering agent, accelerator, brightening agent and other ingredients are all organic acids or lithium salts thereof or metal organic salts containing cations for doping lithium iron phosphate. All the raw materials do not contain nitrogen or sulfur elements, and do not pollute the environment in a plating process; the deposition rate of an obtained plated layer is large, the corrosion resistance is excellent, the plating liquid is good in stability, and the service life is long; and a waste liquid can be directly used for preparing multielement doped lithium iron phosphate/carbon composite positive electrode materials, no waste is generated, and clean production requirements are met. The plating liquid provided by the invention has quite broad application prospects.