Castor Oil-based Polycarbonate Diol | SIOResin® H-8031

Key Features

• Castor oil-based and derived from renewable resources
• High bio-based content: 80–100%
• Solvent-free / 100% solids
• Difunctional polycarbonate diol
• Good gloss development
• Good pigment wetting
• Good flexibility and soft-elastic performance
• Good hydrophobicity
• Suitable for polyurethane and TPU applications
• Suitable for developing bio-based polyurethane systems
• Can be used in solvent-free polyurethane formulations

Typical Physical Data

Application Areas

H-8031 is a reactive polyol designed for use in a wide range of polyurethane systems where flexibility, hydrophobicity, renewable content, and long-term performance are important. Its balanced properties make it suitable for both conventional and high-performance polyurethane formulations.

Typical applications include polyurethane coatings, 2K polyurethane coatings, polyurethane elastomers, thermoplastic polyurethane (TPU), polyurethane adhesives, sealants, flexible polyurethane materials, solvent-free polyurethane systems, and bio-based polyurethane formulations. H-8031 can also be incorporated into formulations where improved water resistance, surface properties, and bio-based content are desired.

For TPU applications, H-8031 can be used as a soft-segment or co-polyol component to tailor flexibility, hardness, elasticity, and other mechanical properties, making it suitable for the development of flexible and high-performance TPU materials.

Processing & Handling

H-8031 is a high-viscosity polyol. For easier handling and homogeneous mixing, the product may be gently warmed before use when necessary. Recommended processing considerations:

• Ensure all equipment and raw materials are clean and dry.
• Avoid unnecessary exposure to moisture.
• Mix thoroughly with the selected isocyanate component.
• Maintain appropriate temperature and mixing conditions according to the formulation.
• For 2K polyurethane systems, the pot life should be evaluated after mixing the polyol and isocyanate components.
• Actual processing conditions should be optimized according to the final application and equipment.

Because isocyanates are moisture-sensitive, appropriate moisture control is recommended throughout the formulation and application process.

Storage & Packing

Packing: 25 kg/drum; 100 kg/drum. Other packaging sizes may be available upon request.

Shelf Life: 12 months from the date of manufacture.

Store in a tightly closed original container in a cool, dry and well-ventilated area.