Product Recommendation | Dimethylol Butyric Acid (DMBA)

Dimethylol Butyric Acid (DMBA)

CAS No.:10097-02-6

Molecular Formula:C6H12O4

Molecular Weight:148.16

Physicochemical Properties:White crystalline solid

Melting Point:108–115 °C; 

soluble in water, methanol, acetone, etc.

Applications of Dimethylol Butyric Acid (DMBA)

Core Function: A hydrophilic chain extender for water-based polyurethanes.

Within the polyurethane molecular chain, DMBA plays a dual role:

Chain Extender:The two primary hydroxyl groups in its molecule react with isocyanate groups (-NCO), thereby extending the polymer molecular chain.

Internal Emulsifier:Once the carboxyl group in the molecule is neutralized by a base (such as triethylamine), it transforms into a carboxylate group. These ionic groups impart excellent hydrophilicity to the polyurethane resin, enabling it to disperse stably in water—forming a water-based polyurethane emulsion—without the need for external emulsifiers or large quantities of organic solvents.

DMBA is a neopentyl carboxylic acid featuring two active hydroxymethyl groups; consequently, it serves as a key building block for synthesizing water-based polymer systems. It finds extensive application in water-soluble polyurethanes, polyesters, epoxy resins, general water-based resins, paints, coatings, inks, leather finishes, electronics, and adhesives. DMBA exhibits superior solubility in various solvents compared to DMPA, thereby significantly enhancing processing efficiency.

DMBA is recognized as a new generation of eco-friendly, green chain extenders and internal emulsifiers for water-based polyurethanes. Its use in the production of water-based polyurethane adhesives eliminates the need for organic solvents, resulting in zero organic residue.