CAB-531-1

CAB-531-1 is a cellulose acetate butryate (CAB) with high butyrate content. It is used as a film former in solvent-based coatings that require good flexibility.
Product Overview
CAB-531-1 is a low molecular weight mixed cellulose ester with high butyrate content. CAB-531-1 is the ideal resin for coatings that require best in class appearance and performance. Pigment orientation, flow, leveling, durability, and gloss are all improved with CAB-531-1. When combined with thermoplastic acrylic resins it forms durable films with excellent weathering resistance. CAB-531-1 has better flexibility than lower butyrate CABs and is compatible with a broader range of solvents and resins. Due to this increased flexibility CAB-531-1 requires less plasticizer modification. CAB-531-1 has also been used in nail care applications as a replacement for nitrocellulose due to the superior UV stability and product safety.
Product Specifications
Viscosity ASTM-A, sec: 1.3 - 2.6
Acetyl by GC, wt%: 2 - 4
Butyryl by GC, wt%: 48 - 52
Free acidity, ppm: 300 Max
Moisture, wt%: 3.0 Max
Hydroxyl, wt%: 1.1 - 2.1
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
Poor color strength and luster due to poor pigment dispersion
sagging of solvent based coatings
Long dry times of solvent based coatings with good flow and leveling
High cost of plasticizers used in coatings
Applications
Automotive Coatings; Nail Care; Plastic Coatings