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CAB-381-0.5
CAB-381-0.5 is a mixed cellulose ester with low viscosity and medium butyryl content. It is used as a film-forming resin, a resin modifier, and an additive in solvent-based coatings and inks.
Eastman CAB-381-0.5 is a cellulose acetate butyrate (CAB) commonly used as a film-forming resin, resin modifier, and additive in many different coating and ink applications. It is supplied as a free-flowing powder. CAB-381-0.5 has a relatively low molecular weight compared to other Eastman CAB products and is, therefore, ideal for applications that demand low viscosity and high-solids content. It provides pigment dispersion, weathering resistance, and excellent control over color, flexibility, and flow. CAB-381-0.5 is compatible with many resins and is soluble in low-cost solvent systems.
CAB-381-0.5 improves wetting, UV stability, and drying times in inks and overprint varnishes. Improved metal flake orientation, resistance to redissolve from the topcoat solvents, and excellent sprayability are key benefits of cellulose acetate butyrate in coatings. CAB-381-0.5 is also commonly used in nail coatings to increase flexibility and improve UV resistance over other additives like nitrocellulose. It also is much safer to use than nitrocellulose because cellulose esters are much less flammable. Nail polish formulated with CAB-381-0.5 features fast cure speeds due to the fast solvent release of the film-forming polymer.
Specifications
Viscosity (ASTM-A, sec): 0.33–0.55
Acetyl (by GC, wt%): 12–15
Butyryl (by GC, wt%): 36–40
Free acidity (ppm, max): 300
Moisture (wt%, max): 3.0
Hydroxyl (wt%): 1.0–2.0
Primary Chemistry: Cellulose acetate butyrate
Features & Benefits
Improves flow and leveling and decreases cratering Reduces dry time Provides easier polishability Improves sprayability Serves as a pigment-dispersion medium Imparts metallic pigment control Increases redissolve and sag resistance Enhances color uniformity Decreases sand scratch telegraphing Facilitates intercoat adhesion
Problems Solved
Low luster of automotive basecoats and topcoats 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 in solvent-based coatings Damage done to coatings by scratching and abrasion Poor flexibility and durability of coatings and inks Use of leveling and flow control agents made not using naturally derived content Safety issues using nitrocellulose
Eastman Solus™ performance additives are the newest cellulose esters designed for high-solids solvent-borne systems. Solus™ is specifically engineered to meet lower VOC target while improving performance in clear, pigmented and metallic automotive coatings.
Eastman CAB enhances efficiencies and reduces waste through fewer rejects and reduced need for re-coating while substantially improving finished outcomes.
Eastman cellulose esters can be formulated into inks as the main film former, co-resin, or additive to improve appearance, performance, and productivity.
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Thank you
Thank you for your inquiry and interest in ChemPoint. We will respond to you shortly.
ChemPoint will not under any circumstances release personal user information to individuals or companies. All information collection is solely used to support ChemPoint customers service communications. Read our Privacy Notice.
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