I. Overview of Traditional Automotive Coating Process
Traditional automotive coating uses the 3C2B (three coats, two bakes) process: electrophoretic primer → intermediate coat → intermediate coat baking → base coat → clear coat → topcoat baking. This process is mature and reliable but has issues such as long process flow, high energy consumption, and high VOC emissions.
II. Compact Coating Process
The compact process reduces the number of coating layers and baking cycles through functional integration and material innovation:
3C1B process: “Wet-on-wet” application of intermediate coat + base coat + clear coat, eliminating intermediate coat baking, saving approximately 20% energy.
B1B2 process (waterborne, primer-free): Integrates the function of the intermediate coat into the base coat, eliminating the intermediate coat line and baking oven, reducing equipment investment and floor space by over 30%.
Single-coat process: Develops integrated coatings that combine both base color and clear coat functions, further simplifying the process.
III. Application of Waterborne Technology in Automotive Coating
The application of waterborne coatings in automotive OEM coating lines is already very mature. Waterborne intermediate coats and base coats have largely replaced solvent-based products, and the promotion and application of waterborne clear coats are accelerating. Key advantages: over 80% reduction in VOC emissions, a safer working environment, and richer color effects.
IV. Kexin Automotive Coating Products
Kexin New Materials offers a complete range of automotive refinish coatings, including waterborne base coats, 2K clear coats, primers, and specialized paints for plastic parts, with precise color matching and excellent application performance.