Solvent-borne, Speciality Additive, Thixotropic Agent

VP 4370 Modified hydrogenated castor oil

Modified hydrogenated castor oil, identified under technical grade 4370, represents a sophisticated advancement in rheological control technology. This organic thixotrope is engineered through the chemical modification of hydrogenated castor oil, typically resulting in a diamide or polyamide structure. Unlike traditional castor derivatives, the 4370 variant is specifically designed to provide superior sag resistance and pigment suspension across a broad range of solvent-borne and high-solid coating systems. Its molecular architecture allows for excellent dispersibility, often eliminating the need for high-temperature activation typically required by conventional castor waxes. This makes it an indispensable additive for modern industrial formulations seeking a balance between performance and processing efficiency. By forming a robust three-dimensional network within the liquid medium, 4370 ensures optimal viscosity recovery and storage stability. Its chemical inertness ensures compatibility with various resins, including epoxies, polyurethanes, and alkyds, making it a versatile solution for demanding architectural and heavy-duty protective coating applications globally.

Attributes

Key Features and Benefits

Superior Anti-Sagging: Provides exceptional resistance to sagging on vertical surfaces, even in high-build coatings.
Enhanced Pigment Suspension: Prevents the hard settling of pigments and fillers during extended storage.
Temperature Stability: Exhibits consistent performance across various processing temperatures, reducing the risk of seeding.
Low Activation Energy: Requires less shear and heat for activation compared to conventional castor waxes.
Improved Leveling: Balances thixotropic structure with flow properties to ensure smooth finishes.
System Compatibility: Highly compatible with aromatic and aliphatic solvents, plus solvent-free systems.
Cost Efficiency: High potency allows for lower dosage levels.

Specifications

Technical Highlights

Chemical Identity: A specialized modified amide derivative of hydrogenated castor oil (CAS 8001-78-3).
Physical Form: Supplied as an off-white micronized powder for rapid incorporation.
Active Content: 100% active organic material, ensuring maximum efficiency without VOC contribution.
Particle Size: Controlled micronization ensures narrow distribution for optimal surface area contact.
Melting Point: Features a high melting range (120°C–135°C), providing excellent heat resistance.
Rheological Profile: Imparts strong shear-thinning behavior, facilitating easy application while maintaining high low-shear viscosity.
Stability: Non-reactive with most common binder systems and pigments.

Download Technical Data Sheet (TDS)

Practical industry uses

Applications

Protective Coatings: Ideal for marine and industrial coatings requiring high-build film thickness.
Automotive Refinish: Used in primers to ensure uniform film build and metallic pigment orientation.
Architectural Paints: Enhances brushability and sag resistance in premium solvent-borne enamel paints.
Adhesives and Sealants: Provides necessary body and slump resistance in polyurethane and epoxy adhesives.
Printing Inks: Improves the rheology of gravure and offset inks for better print definition.
Wood Coatings: Ensures consistent application and prevents pigment runoff in wood stains.
Chlorinated Rubber: Effective thixotrope for specialized rubber-based coating formulations.