Coating Raw Material

Coating Raw Material

Coating raw material is the chemical components that are incorporated into paints and coatings during the manufacturing process.coating raw material The raw materials are required to produce a finished product that is safe for its intended use, provides the protection needed and meets the design criteria outlined in the specifications. This is accomplished by careful selection of raw materials from the vast array available, taking into consideration the type of substrate and other factors that will influence a successful application.

Depending on the specific requirements of an individual project, a wide variety of options are available for coating raw material, ranging from industrial spray painting to paint brushes and rollers used in various applications. These applications may include industrial processes and equipment, such as mechanical bearings that need special lubrication to reduce friction. The right coating can extend the life of the component, decrease downtime and maintenance costs and improve performance.

The major raw materials in coatings are solvents, pigments and fillers, rheological modifiers and other additives. Solvents account for the largest portion of the demand on a volume basis, followed by other additives. Rheological modifiers are added to liquid coatings to control viscosity and flow, especially under shear conditions such as when the coated film is being pumped, mixed, and shipped. Fumed silicas, treated clays, polyamides, alkali swellables and cellulosics are among the most commonly used rheological modifiers.

Pigments, primarily talcs and silicates, are the next largest category of coating raw material on a volume basis. In addition to the standard whites, yellows and reds, specialty pigments such as anticorrosive pigments, metallic pigments and pearlescent pigments are also in demand. Other pigments, such as titanium dioxide, zinc oxide and carbon black, are utilized to add color and hide surface imperfections.

In addition to abrasives and surfactants, other additives include biocides that prevent fungus, bacteria or mold from growing in a drying film, foam control agents and coalescents. Biocides also act as dry film preservatives to extend shelf life. Plasticizers are added to a coating to increase flexibility and may also be utilized for their antifoaming properties or their foam control capabilities.

The final category of additives are a broad grouping of miscellaneous ingredients. Some examples are waxes, wetting aids, fungicides, UV absorbers and stabilizers, crosslinking agents and defoamers. Crosslinking agents help to strengthen the coating’s polymer network, resulting in improved resistance to wear and corrosion. UV absorbers and stabilizers are added to limit the degradation of the coating by ultraviolet light, allowing the coating to retain its color and durability longer.

Powder coating is an alternative to liquid systems, which requires large capital investment for specialized equipment. It has a lower environmental impact, because it doesn’t emit VOCs (volatile organic compounds), and is easier to recycle than liquid materials. A good powder coating can last for decades, reducing maintenance and replacement costs and extending the lifetime of a part. The wrong powder coating can damage the equipment, leading to production delays and higher operating costs.