2,2,4-Trimethyl-1,3-pentanediol diisobutyrate CAS 6846-50-0

Introduction to 2,2,4-Trimethyl-1,3-pentanediol diisobutyrate

2,2,4-Trimethyl-1,3-pentanediol diisobutyrate is the diester formed from isobutyric acid and 2,2,4-trimethyl-1,3-pentanediol. It appears as a clear, colorless liquid at room temperature with an extremely faint characteristic odor. It mixes freely with most common organic solvents and shows very low solubility in water.

Industrial production follows direct esterification of the corresponding diol with isobutyric acid under catalytic conditions, followed by vacuum distillation for final purification. The highly branched molecular structure gives the product good hydrolysis resistance and low migration tendency. Its high boiling point and slow evaporation rate make it suitable as a long-lasting coalescing and plasticizing agent across multiple formulation systems.

Chemical & Physical Properties

Applications

Architectural coating coalescent: Added to acrylic and styrene-acrylic latex paints to lower minimum film formation temperature. It promotes polymer particle fusion during drying, producing continuous, defect-free films with improved scrub resistance and stain repellency.

PVC processing plasticizer: Used as a non-phthalate plasticizer in PVC plastisols and flexible vinyl goods. It improves melt flow and low-temperature flexibility, and exhibits low migration and good extraction resistance for durable finished products.

Printing inks and adhesives: Incorporated into solvent-based inks and pressure-sensitive adhesive formulations to regulate drying speed, enhance leveling and boost substrate adhesion while reducing surface defects.

Leather finishing auxiliaries: Works in leather coating systems to improve coating softness and flex endurance, contributing to a smoother hand feel on finished leather goods.

Storage & Safety Precautions

• Store in tightly sealed galvanized steel drums or stainless steel containers in a cool, ventilated warehouse. Keep away from strong oxidizing agents and open flame. Maintain storage temperature below 35 °C.
• Wear chemical goggles and nitrile rubber gloves during bulk transfer operations. Maintain general ventilation in handling areas. Avoid prolonged or repeated skin contact. The material has a high flash point but still requires standard flammable liquid handling practices.
• Inspect drum seals periodically for leakage and moisture ingress. The product is stable under normal storage conditions and shows minimal color drift over extended inventory periods.

FAQ

Q: What role does 2,2,4-Trimethyl-1,3-pentanediol diisobutyrate play in latex coatings?

A: It acts as a coalescing agent that lowers minimum film formation temperature. It helps polymer particles fuse into smooth continuous films and improves final scrub resistance and stain resistance.

Q: Can this product replace phthalate plasticizers in PVC formulations?

A: Yes. It serves as a non-phthalate option for PVC plastisols and flexible products. It delivers good flexibility, low migration and solid extraction resistance for durable PVC applications.

Q: What storage conditions are recommended for this diester?

A: Store in sealed drums in a cool, ventilated area away from oxidizers and direct heat. Keep containers closed to prevent moisture pickup and foreign contamination.