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CAB-531-1
CAB-531-1 is a cellulose acetate butyrate (CAB) with high butyrate content. It is used as a film former in solvent-based coatings that require good flexibility.
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- Manufacturer: Eastman
- Product Line: Eastman Cellulose Esters
- Product: Cellulose Acetate Butyrate
- Industries: Adhesives | Coatings | Inks | Personal Care
- Authorized Countries: Canada | United States
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Overview
Eastman 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 Eastman CAB-531-1. When combined with thermoplastic acrylic resins, this cellulose acetate butyrate 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. As this cellulose acetate butyrate has a higher viscosity than other Eastman CABs, it is very effective in increasing cold-crack resistance. CAB-531-1 has also been used in nail care applications as a replacement for nitrocellulose due to superior UV stability and product safety since cellulose esters are much less flammable than nitrocellulose.
Specifications
Viscosity (ASTM-A, sec): 1.3–2.6
Acetyl (by GC, wt%): 2–4
Butyryl (by GC, wt%): 48–52
Free acidity (ppm, max): 300
Moisture (wt%, max): 3.0
Hydroxyl (wt%): 1.1–2.1
Primary Chemistry: Cellulose acetate butyrate
Features & Benefits
- Improves flow and leveling
- Reduces cratering
- Reduces dry time
- Provides 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
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 Use of flow and leveling agents made not using naturally derived materials Insufficient viscosity build using low–molecular weight CABs Safety issues using nitrocellulose
Applications
Automotive coatings Nail care Plastic coatings
Related Applications
Adhesives
Coatings
- Aerosol Coatings
- Aerospace Coatings
- Appliances & Machinery Coatings
- Architectural Coatings
- Automotive OEM Coatings
- Automotive Refinish
- Basecoats
- Ceramic Coatings
- Coil Coatings
- Consumer Paints
- Electronics Coatings
- Floor Coatings
- Furniture Coatings
- Industrial Coatings
- Lacquers
- Marine Coatings
- Metal Coatings
- Nail Polish
- Overprint Varnishes
- Pipe Coatings
- Plastic Coatings
- Primers
- Special Purpose Coatings
- Stone and Tile Coatings
- Terra Cotta Coatings
- Textile & Leather Coatings
- Topcoats
- Traffic Paint
- Wood Coatings
- Automotive Inks
- Commercial & Publication
- Corrugated Boxes
- Digital Inks
- Flexible Films
- Glass & Ceramics
- Graphic Arts Coatings
- Narrow Web
- Packaging
- Plastics
- Printed Electronics
- Tag & Label
- Textiles
Related Chemistries
Related Functions
Adhesives
Coatings
Inks
Personal Care
Related Technologies
Eastman Cellulose Esters Articles
Eastman Cellulose Esters - Metal coatings
Eastman CAB enhances efficiencies and reduces waste through fewer rejects and reduced need for re-coating while substantially improving finished outcomes.
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