Paint Additives for Solvent-Base Paints

Summary:

Summary: Paint additives play a crucial role in improving the performance and characteristics of both solvent-based and water-based paints. In solvent-based paints, additives such as paint driers, wetting and dispersing agents, anti-settling agents, anti-skinning agents, anti-flood and anti-float additives, and mildew inhibitors/fungicides are used to promote oxidation and drying, improve pigment dispersion, prevent settling and flocculation, inhibit skin formation, and protect against mould growth. In water-based paints, surface active agents, anti-foam agents, latex thickening agents, preservatives, coalescing aids, freeze-thaw stabilizers, pH modifiers, and plasticizers are utilized to achieve pigment dispersion, control foam formation, adjust viscosity, prevent microbial growth, enhance film formation, prevent damage from freezing, control pH levels, and impart flexibility to the paint film. Understanding these additives’ functions and proper usage is essential for formulating high-quality paints with desired performance characteristics.

Excerpt:

Paint Additives for Solvent-Base Paints

Paint additive course for solvent base paint

• paint driers
• wetting and dispersing agents
• Anti settling anti-sag and bodying agent
• Anti skinning agents
• Anti-flood and anti-float additives
• Mildew inhibitors fungicides

    Paint driers are divided into two part 

• primary driers
• Secondary driers

Primary drivers are known as surface or skin driers since in oxidizable

Vehicles

Cobalt and Manganese

Cobalt has the highest activity level in promoting autoxidation; it is referred to as ski driers top driers; it is used at levels of only 0.02 to 0.08 per cent by mass Of metal base on the vehicles solids.

Manganese is used as surface driers at only 0.02 to 0.06 per cent by Mass of the metal base on the vehicle’s solids.

Secondary Driers

Lead   Calcium Zinc Zirconium   Iron   Rare earth and cerium   aluminium   Vanadium We used calcium with cobalt and zirconium as a mixture, and we used calcium at 0.025 To 0.15 per cent by mass of metal base on the vehicles solids Zirconium is used at level 0.02 to 0.15 per cent by mass of metal base on the vehicles Solids

The problem will happen if we add more quantity from surface driers

Chalking with latter embrittlement (lessened flexibility) Yellowing of a paint film on ageing is related to oxidation processes.