Introduction for waterborne aluminum paste
Introduction for waterborne aluminum paste （I）
Water borne aluminum paste is an environmentally friendly metallic pigment. It has undergone special processing technology and surface coating treatment to make the surface of aluminum flakes smooth and regular shape, concentrated particle size distribution, and excellent compatibility with water-based paint systems. Water-based aluminum silver paste can be divided into two categories: leafing type and non-leafing type. With the continuous improvement of the international environmental protection requirements and the continuous strengthening of people's awareness of environmental protection, the green and environmentally friendly water-based aluminum powder slurry has gradually replaced the original high-pollution solvent-based aluminum powder slurry and has become a new choice.
Water-based aluminum-silver paste is mainly composed of flake aluminum particles, water, and water-based solvent.
1. Division of leafing aluminum and Non leafing aluminum paste
Water-based aluminum silver paste can be divided into two types: leafing type and non-leafing type. The water-based leafing type silver paste floats on the surface of the paint film because of its low surface tension. Its biggest feature is brightness, which can approach the metal effect of electroplating silver. This is also one of the most important needs of its customer groups; another feature is good corrosion resistance, which is superior to water-based non-leafing aluminum silver paste in terms of corrosion resistance.
However, the main problem is that the adhesion is not good, because the aluminum powder floats up and the bonding force between the water-based leafing aluminum paste and the water-based resin is not very good, and the silver powder is easy to fall off, making it difficult to recoat; another problem of the water-based leafing aluminum is the storage stability is not particularly good, and the storage time is relatively short. Leafing aluminum paste is generally used in roof coating, maintenance, anti-corrosion coatings, reflective coatings, electroplating effect coatings and commercial coatings that require high protection. There are various types of water-based non-leafing aluminum pastes, from low to high in coloring strength, from coarse to fine in particle size, from white and shiny to gray and delicate in appearance. There are also acid-resistant products to reduce industrial smog, acid rain, etc. The influence of adverse environment on coatings. It is evenly distributed in parallel throughout the paint film, and has a tendency to sink. The paint film is solid and stable, and can be recoated. The appearance of the formed paint film is different from that of the leafing aluminum-silver paste, because it can be mixed with many varieties of pigments, so it has unique effect on industrial coatings. Widely used in industrial coatings, automotive coatings and decorative coatings.
2. Effect division
Water-borne aluminum silver paste can be divided into fine silver, electroplating silver, and sparkle silver (fine flash, medium flash, and coarse flash) according to the effect.
Fine silver is delicate and bright white, with a weak metallic texture and strong hiding power; the thinner electroplated silver has the effect of electroplating effects; the sparkle silver has a metallic effect that varies with the angle, and has a strong metallic feeling but relatively weak hiding power.