Aluminum paste is a widely used metallic pigment with a silver-grey metallic luster. It is commonly known as silver paste in the coatings industry. It is actually metallic aluminum paste and does not contain any silver components. It only has a silver metallic texture.It is a type of pigment paste that contains aluminum flakes or powders suspended in a solvent. It is primarily used in various industries for its unique properties and applications. Here are some applications of aluminium paste: Ⅰ.Painting & Coatings Ⅱ.Automotive Industry Ⅲ.Printing Inks Ⅳ.Reflective Films Ⅴ.Construction Materials Ⅵ.Electronics and Appliances It's worth noting that the specific applications of aluminium paste can vary depending on the formulation and the requirements of different industries. Additionally, the use of aluminium paste should follow applicable safety guidelines as aluminum can be a flammable material in certain forms.

  Paint composition Main film-forming substances Also known as binder, the main film-forming substances are mostly organic polymer compounds such as natural resins (rosin, lacquer), coatings (tung oil, linseed oil, soybean oil, fish oil, etc.), synthetic resins and other mixed ingredients, which are formed through high-temperature reaction. There are also paints composed of inorganic substances (such as: inorganic zinc-rich paint). It is the main body of the paint and determines the performance of the paint film. If there is no film-forming substance, pure pigments and auxiliary materials cannot form a paint film. Generally, the main film-forming substances refer to various types of resins. There are mainly: asphalt resin phenolic resin, alkyd resin, amino resin, nitro resin, perchlorethylene resin, acrylic resin, polyester resin, polyurethane resin, silicone resin, vinyl resin, fluorocarbon resin, etc. Secondary film-forming substances Including various pigments, body pigments, and anti-rust pigments. Pigments provide color and hiding power for the paint film, improve the protective performance and decorative effect of the paint, and pigments with good weather resistance can increase the service life of the paint. Body pigments can increase the thickness of the paint film. By utilizing the properties of its own "flake-like and needle-like" structure, through the accumulation and overlapping of pigments, a fish-scale-like paint film is formed, which increases the service life of the paint film and improves its waterproofness and anti-rust effect. Anti-rust pigments prevent the surface of objects from being corroded by the atmosphere and chemical substances, and the metal surface from being rusted through their own physical and chemical anti-rust effects. Auxiliary film-forming substances Including various additives and solvents. Various additives play a very important role in the production, storage, use, and film formation process of paint. Although the usage is minimal, it has a significant impact on the performance of the paint film. The level of paint additives also represents the level of national paint. Solvent, also known as "dispersion medium" (including various organic solvents and water. Organic solvents mainly include aromatic hydrocarbons such as benzene, toluene, xylene, etc.; fatty hydrocarbons such as pentane, hexane, and octane; cycloalkanes such as cyclohexane, cyclohexanone, toluene, and cyclohexanone; halogenated hydrocarbons such as chlorobenzene, dichlorobenzene, and dichloromethane; alcohols such as methanol, ethanol, and isopropanol; ethers such as ether and epichlorohydrin; esters such as methyl acetate, ethyl acetate, and propyl acetate; ketones such as acetone, methyl butanone, and methyl isobutyl ketone; diol derivatives such as ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, and ethylene glycol monobutyl ether; other 10 categories), mainly dilutes film-forming substances to form viscous liquids for production and construction.  

Paint classification According to product form Solvent-based coatings, powder-based coatings, high-solid coatings, metallic coatings, pearlescent coatings, solvent-free coatings, water-soluble coatings, etc. According to purpose Architectural coatings, can coatings, train coatings, aircraft coatings, home appliance coatings, wood coatings, bridge coatings, plastic coatings, paper coatings, ship coatings, wind power generation coatings, nuclear power coatings, pipeline coatings, steel structure coatings, rubber coatings, aviation coatings, etc. According to performance Anti-corrosion coatings, anti-rust coatings, insulation coatings, high temperature resistant coatings, aging resistant coatings, acid and alkali resistant coatings, chemical medium resistant coatings According to whether there is color Varnish, paint According to construction process Sealer, putty, primer, surfacer, topcoat, varnish According to construction method Brush coating, spray coating, roller coating, dip coating, electrophoretic coating, etc. According to function Non-stick coatings, Teflon coatings, decorative coatings, anti-corrosion coatings, conductive coatings, anti-rust coatings, high temperature resistant coatings, temperature indicating coatings, thermal insulation coatings, fire retardant coatings, waterproof coatings, etc. According to film-forming substances Natural resin paint, phenolic paint, alkyd paint, amino paint, nitro paint, epoxy paint, chlorinated rubber paint, acrylic paint, polyurethane paint, silicone resin paint, fluorocarbon resin paint, polysiloxane paint, vinyl resin paint  

1.Masterbatch = pigment + carrier + additive 2.Generally speaking, the carrier is a thermoplastic resin, which has good wetting and dispersing effects on pigments and has good compatibility. Masterbatch is currently the most common method for plastic coloring. The quality of masterbatch depends largely on the supply of raw materials such as pigments and dispersants. 3.Dispersant: It makes the pigment uniform and no longer agglomerates. The melting point of the dispersant should be lower than that of the resin, and it should have good compatibility with the resin and good affinity with the pigment. The most commonly used dispersants are polyethylene low molecular wax, stearate, etc. 4.Masterbatch classification by carrier:PE、PP、ABS、PVC、EVA

Ⅰ.sparkling aluminum paste: sparkling aluminum paste with different flashing effects in the particle size range of 14um-75um. Generally, coarse-particle aluminum powder is used for production, and the solvent is high flash point aromatic 150# or D series dearomatized solvent. Ⅱ.Features: This series of silver paste has unique flashing, bright and angle-dependent color effects. According to the shape of the scales, the thickness and regularity, the absorption and reflection effects of light are different, and it can be divided into two types: strong flash type and silver dollar type. Flash silver basically follows the product color law of finer white, coarser brighter, better flash point, and stronger metallic feel. Ⅲ.Application: Mainly used in various metallic flash paints for engineering machinery, power tools, bicycles, motorcycles, automobiles, etc., and can also be used in coatings such as plastics and wood.

Ⅰ.Leafing aluminum paste: Products with different floating effects in the range of 5um to 15um, divided into ordinary type and high floating (titanium silver) Ⅱ.features: This type of product has very good floating power, can float on the surface of the paint film, and can effectively reflect light and heat: In addition, it has good hiding power and white brightness. High-quality floating silver can produce a mirror effect in a low-acid resin system. Ordinary floating silver 300 mesh screening, floating power is about 70%, low aluminum content, white brightness, floating value are very general; high floating silver 500 mesh screening, aluminum content standard, floating power about 90%, black and bright effect Ⅲ.Application: This type of product is mainly used for printing inks, reflective coatings, paper coatings, aerosols and anti-corrosion coatings, etc.

Ⅰ.Fine white aluminum paste: Fine silver products of different grades, high, medium and low, are available in the range of 4um-20um. Generally, medium-coarse aluminum powder is used for production, and the solvent is high flash point aromatic 150# or D series dearomatized solvent. Ⅱ.Features: This series of products is prepared by special process, with high whiteness and very good hiding power, and the surface is fine and smooth. According to different characteristics and requirements, it is divided into three types: anti-corrosion fine silver, standard fine silver and high-brightness silver. Ⅲ.Application: Mainly used in hammer coatings, coil coatings, ship coatings, anti-rust primer coatings, printing inks, mobile phone shell coatings, toy coatings, motorcycles and other plastic coatings.

As a film-forming substance,resin has many advantages,for example: Ⅰ.It can form a continuous, uniform film with certain strength and toughness on the surface of the object, effectively protecting the surface of the object. Ⅱ.It has good resistance to chemical substances such as acid, alkali, and salt, which can extend the service life of the protected object in harsh chemical environments. Ⅲ.The film formed by most resins has low water absorption, which can prevent water penetration and avoid damage to objects due to moisture. Ⅳ.By adding different pigments and additives, coatings of various colors and different glossiness can be obtained to meet different decorative needs. Ⅴ.It can be mixed with a variety of solvents, additives, etc., and by adjusting the formula and processing technology, it can be made into coatings, inks and other products suitable for different construction methods and application scenarios.

Aluminum silver paste is just one of the raw materials for coatings and paints. Before making paint, it is necessary to add Solvent/Resin/Dispersant etc.! Ⅰ. Solvent: such as butyl acetate, propylene glycol methyl ether, etc. Its function is to dissolve film-forming substances such as resin and adjust the viscosity and drying speed of paint. Ⅱ. Resin: Common ones include acrylic resin, polyester resin, etc. Resin is the film-forming substance of paint and determines the basic properties of paint, such as adhesion, hardness, weather resistance, etc. Ⅲ. Dispersant: It can reduce the time and energy required for the aluminum silver paste dispersion process, stabilize the aluminum silver paste pre-dispersion, adjust its surface properties and mobility, and prevent the aluminum silver paste particles from agglomerating. Ⅳ. Silver powder alignment agent: can ensure the glossiness of the paint and make the paint present a better metallic texture. Ⅴ. Leveling agent: silicone leveling agent or acrylic leveling agent can make the paint form a flat and smooth surface during the drying process Ⅵ. Anti-settling agent: such as polyamide wax and polyethylene wax, can prevent aluminum silver paste from settling in the paint and maintain the stability of the paint system Ⅶ. Other additives: thickeners may be added to adjust the viscosity of the paint as needed, and rust inhibitors and preservatives may be added to improve the anti-corrosion performance of the paint.  

       Before use, pre-disperse the aluminum paste with the solvent. Generally, the ratio of aluminum paste to solvent is 1:2. During the dispersion process, use low-speed stirring. Avoid stirring too fast, which will cause high shear force to destroy the shape of the aluminum paste and reduce the brightness. The best dispersion speed should be determined through experiments. This depends on many factors and the geometric dimensions of the stirring equipment (ratio of the diameter of the stirring disk to the diameter of the container, the shape of the stirring disk, etc.), temperature and viscosity of the coating, solvent selection and the amount of aluminum paste added (see the table below)

    Brilliance, brightness, colour saturation, coverage, flop and DOl - depend not only on particles and particle size distribution, but also on the orientation of the aluminium flakes in the paint film. Best effects are achieved when the flakes lie parallel to the surface of the film. Poor orientation :leads to"clouding" or to an uneven "salt and pepper" effect. The evaporation of the solvent causes the film t shrink and virtually press the aluminium paste into a horizontal position.     The higher the solvent content of the paint, the more pronounced this effect is. This explains the observed phenomenon that pigment orientation and thus the optical properties of" low solid paints"are considerabl'y better than those of high solid paints".

       The ductile nature of the metal sused means that milling or crushing of spherical aluminum powder in the ball mill creates flakes with shape factors (flake thickness: flake diameter ) of 1:50 to 1:200.        Silver Dollar Shape: Using fine-grained spherical aluminum powder with extremely narrow particle size, after slow grinding process, we can get aluminum sheets with smooth surface, moderate diameter-thickness ratio, narrow particle size distribution, high sparkle and strong hiding power.         Snowflake and Scale Shape: They are made by grinding aluminum powder with coarser particle size. Statistical particle thickness can vary depending on the product and the milling technology used, i.e. the various pigments are not monodisperse particles but heterodisperse systems with a more or less statistical distribution of particle sizes and thicknesses.         Particle size distribution in metallic pigments has a decisive influence on the optical properties of the applications. It is essential, therefore, to measure particle size distribution for quality control and in order to classify the pigments, the anisotropy of the flakes makes this in difficulty