CAB-381-0.5

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CAB-381-0.5 is a mixed cellulose ester with low viscosity and medium butyryl content. It is used as a film forming resin, resin modifier, and additive in solvent-based coatings and inks.
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Product Overview
CAB-381-0.5 is commonly used as a film forming resin, resin modifier, or additive in many different coating and ink applications. Because of it's low molecular weight CAB-381-0.5 is ideal for applications that demand low viscosity and high solids content. It provides excellent color, flexibility, flow control, pigment dispersion and weather resistance. CAB-381-0.5 is compatible with many resins and is soluble in low-cost solvent systems. CAB-381-0.5 provides improved wetting, UV stability, and drying times in inks and over print varnishes . In coatings improved metal flake orientation, resistance to redissolve from the topcoat solvents and excellent sprayability are key benefits of CAB-381-0.5. CAB-381-0.5 are also commonly used in nail coatings to provide increase flexibility and improved UV resistance over other additives like nitrocellulose. Nail polish formulated with CAB-381-0.5 offer fast cure speeds due to the fast solvent release of the film forming polymer.
Product Specifications
Viscosity ASTM-A, sec: 0.33 - 0.55
Acetyl by GC, wt%: 12 - 15
Butyryl by GC, wt%: 36 - 40
Free acidity, ppm: 300 Max
Moisture, wt%: 3.0 Max
Hydroxyl, wt%: 1.0 - 2.0
Primary Chemistry: Cellulose Acetate Butyrate
Features & Benefits
Improve flow and leveling
Reduce cratering
Reduce dry time
Provide polishability
Improve sprayability
Pigment dispersion medium
Metallic pigment control
Redissolve resistance
Sag resistance
Enhanced color uniformity
Decreased sand scratch telegraphing
Intercoat adhesion
Problems Solved
Low luster of automotive base coats and top due to poor metallic pigment flake orientation
Yellowing of nail polish and coatings formulated with nitrocellulose when exposed to heat and UV
Cratering and orange peel surface defects of solvent based coatings
Damage done to coatings by scratching and abrasion
Poor flexibility of highly durable coatings and inks
Applications
Automotive OEM Coatings; Plastic Coatings; Lacquers; Wood Coatings; Gravure Inks; Screen Inks; Overprint Varnish; Nail Polish