Keytec SI/TSI Colorants: New Hues for Water-Based Baking Coatings

The Development of Water-Based Industrial Baking Paint

Amid the nation’s push for sustainable green development, water-soluble acrylic/polyester baking paints, with their eco-friendly properties and process advantages, are gaining growing competitiveness in the industrial coatings market, widely used in automotive, furniture, hardware parts, sports equipment and other fields.

Application Challenges of Pigment Pastes

Due to the weak hydrophilicity of industrial baking paint resins, a large amount of alcohol ether cosolvents need to be added to improve system performance. However, when ordinary color pastes on the market are used in alcohol ether-containing systems, their incompatible properties easily cause problems like flocculation and coarsening, affecting the film-forming effect.

1. Alcohol Ether Resistance Performance Test

We compared the alcohol-ether resistance of several ordinary pigment pastes on the market with Keytec SI/TSI series color pastes. The test involved mixing alcohol and color paste at a 7:3 ratio and stirring thoroughly. A good compatibility between the color paste and alcohol was indicated if there were no granular precipitates in the cup and no particles adhering to the cup wall; otherwise, the compatibility was deemed poor. From the comparison, it is evident that our SI/TSI series color pastes exhibit no particles or flocculation, with excellent alcohol-ether resistance.

2. High-temperature Resistance Test

Generally, water-based baking paints require high-temperature baking (usually ≥120℃) to form a film, so the pigment pastes used must be able to withstand the baking temperature. Therefore, for pigment pastes applied in water-based baking paint systems, in addition to excellent alcohol-ether resistance, good compatibility and high-temperature resistance are also crucial. Keytec’s SI/TSI series pigment pastes, when tested in water-based baking paint binders from two different manufacturers, after being baked at 120℃ for 10 minutes, resulted in a complete and smooth paint film without blistering, particles, or discoloration compared to the unbaked state.

 A high-quality colorant paste is the core component for achieving color functionality in water-based baking paints, while the system characteristics of water-based baking paints strictly define the type and performance of the color paste. Only when the two are perfectly matched can an unparalleled color decorative effect be achieved. Keytec SI/TSI Series Colorants for Water-Based Industrial Paint features excellent resistance to alcohol ethers, outstanding compatibility, and high-temperature resistance, providing a comprehensive and reliable color solution for water-based baking paints.