Field 5: Automotive Refinish
Block Title: Automotive Refinish – Metallic Pigment Orientation, Weather Resistance
Description:
Used for automotive topcoats and clearcoats in refinish applications. Requires uniform orientation of metallic pigments (aluminum, pearl), good weather resistance, and lasting gloss.
Recommended Products:
Cellulose Acetate Butyrate (CAB) – Primary recommendation
Cellulose Acetate Propionate (CAP)
| Typical Parameters: | |
| Parameter | Recommended Range |
| CAB Grades | CAB-381-0.5, CAB-381-2, CAB-551-0.2 |
| Butyryl Content | 35% – 55% |
| Viscosity | 0.5 – 20 sec (falling ball, varies by grade) |
| Application Feature | Promotes metallic pigment orientation, prevents resolvency |
Key Value: CAB is the key additive for achieving metallic effects in automotive refinish coatings.