CAB-500-5 is a medium molecular weight cellulose acetate polymer with high butyrate content. It is commonly used as a film former in coatings and inks.
CAB-500-5 is a mixed cellulose ester that is used as binder or additive in coatings and inks. With a high butyryl level, CAB-500-5 contributes to high flexibility, high solubility and compatibility with cross-linking resins and plasticizers. It is used in finishes to improve dry-to-touch time, reduce cratering, provide better pigment dispersion and improve coating performance. It has tolerance for nonpolar aliphatic and aromatic hydrocarbons.
Viscosity ASTM-A, sec: 3 - 6
Acetyl by GC, wt%: 2.5 -5
Butyryl by GC, wt%: 49 - 53
Free acidity, ppm: 300 Max
Moisture, wt%: 3.0 Max
Hydroxyl, wt%: 0.8 - 1.2
Primary Chemistry: Cellulose Acetate Butyrate
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
Incompatibility of film forming resins with solvents
Cracking and adhesion failure of coatings and inks on flexible surfaces
Poor color uniformity of inks and coatings
Poor flow and leveling of solvent based coatings that leads to defects
Automotive Coatings; Lacquers; Printing Inks;
Cellulose Esters enhance appearance, performance and protection capabilities of wood coatings and finishes. They are used as co-resin or additive to provide benefits to 2K PU/acrylics, acid-cured and UV-cured formulations.
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.
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