ØWhat is coating? What’s it made of?
Coating is a kind of liquid or solid material which could be cured on the object surface under certain conditions to act protection, decoration or other special functions (such as insulation, rust, mildew, heat resistance, etc.).
Coatings generally consist of four basic components: Resin or emulsion, pigments, solvents and additives.
ØMain coating types and applications:
1. Polyurethane coating has good glossy, water resistance and wear resistance, which is widely used in high-end wood furniture area and can also be cured on metal surfaces.
2. The main film-forming material of acrylic coating is acrylic co-polymerization emulsion. It is mainly used in interior or exterior wall painting, leather painting, and floor lacquer.
3. Epoxy paint is a kind of two-component coating, which is composed of epoxy resin and polyamide curing agent. It’s mainly applied in metal anti-corrosion and automobile primer coating.
4. Unsaturated polyester coating is a kind of multi-component coating, which is a thick lacquer made of polyester resin as the main film forming substance. It’s mainly used for high-end furniture coating and floor lacquer.
ØWhy does coating occur discoloring and cracking? How to solve this problem?
Degradation is always due to thermal oxidation or UV radiation. Thermal oxidation is mainly caused by oxygen or ozone. It can occur at room or high temperatures. Under these conditions, antioxidants can reduce thermal oxidation and the formation of peroxy free radicals, to prevent the formation of colored groups and the deterioration of coating performance.
Generally, hindered phenolic antioxidants are used as main antioxidants. Phosphate esters are used as auxiliary antioxidants. Hindered phenolic antioxidants can react with free radicals to inhibit further formation of free radicals. Phosphite ester antioxidant can decompose hydroperoxide. When main antioxidant and auxiliary antioxidant are used together in coatings, the service life and weather resistance will be further improved.
ØOMNISTAB SOLUTIONS FOR COATING:
OMNISTAB UV1130 can effectively protect the coating from cracking and spots. As the product is easy to emulsify, it can also be applied in water-based system. It’s specially suitable for industrial and automotive coatings with high weather resistance requirements.
OMNISTAB LS292 is a kind of liquid HALS, which is usually used together with OMNISTAB UV1130.
OMNISTAB LS123 is especially suitable for acid coating system which requires low alkalinity HALS.
OMNISTAB UV5151 is a compound additive of OMNISTAB UV1130 and LS292.
OMNISTAB UV384-2 is suitable for coatings under high temperature and extreme climate condition. Its wide UV absorption can effectively protect the substrate surface.
OMNISTAB UV1 is mainly used for epoxy coatings.
OMNISTAB AN1135 has low volatility and excellent compatibility with most coatings.
OMNISTAB AN626 is a phosphite ester antioxidant, which mainly used in powder coatings.
