BDO and Its Derivatives, High-Purity Solvents

2, Methyl-1,3-Propanediol (MPO)

2-Methyl-1,3-propanediol, commonly known as MPO, is a versatile, branched aliphatic glycol that serves as a high-performance alternative to traditional glycols like neopentyl glycol or propylene glycol. This colorless, low-viscosity liquid possesses a unique molecular structure characterized by a primary hydroxyl group arrangement and a pendant methyl group. This configuration inhibits crystallization, providing MPO with a remarkably low freezing point and excellent handling characteristics even in cold climates. Chemically, it functions as a highly reactive diol intermediate, facilitating the synthesis of various polymers, including saturated and unsaturated polyesters, polyurethanes, and alkyd resins. Its liquid state at room temperature simplifies processing by eliminating the need for melting equipment, thereby reducing energy consumption and operational complexity in industrial manufacturing environments. MPO enhances the solubility, flexibility, and clarity of final products, making it indispensable in the formulation of high-quality coatings, adhesives, and personal care products where superior performance and durability are essential requirements overall.

Attributes

Key Features and Benefits

Unique liquid form at room temperature allows for easy handling and eliminates the costly heating steps required for solid glycols like NPG.
High boiling point and low volatility ensure stability during high-temperature esterification processes, reducing material loss and improving batch consistency.
The branched methyl group provides exceptional steric hindrance, which significantly enhances the hydrolytic stability of resulting polyester chains and finished resins.
Excellent compatibility with a wide range of organic solvents and water makes it a versatile building block for both solvent-borne and waterborne systems.
Low toxicity profile and biodegradability support environmental compliance goals.

Specifications

Technical Highlights

Molecular formula C4H10O2 with two primary hydroxyl groups ensures high reactivity and predictable polymerization kinetics in polyester and polyurethane synthesis.
Low freezing point of minus fifty-four degrees Celsius enables storage and transport in extreme cold without the risk of crystallization or solidification.
Refractive index of approximately 1.445 contributes to the high gloss and optical clarity of clear coats and specialty plastic applications.
Viscosity of 178 centipoise at twenty degrees Celsius provides ease of pumping and mixing in standard industrial chemical processing equipment.
Specific gravity of 1.01 facilitates precise volumetric dosing.

Download Technical Data Sheet (TDS)

Practical industry uses

Applications

Premium polyester resins for powder coatings and coil coatings, where it improves flexibility, weatherability, and resistance to yellowing over time.
High-performance polyurethane elastomers and adhesives, enhancing the chemical resistance and mechanical strength of the final cured polymer matrix.
Personal care and cosmetic formulations where it acts as a humectant, emollient, and solvent, providing a smooth skin feel and stability.
Unsaturated polyester resins for marine and construction composites, offering improved toughness and reduced shrinkage during the curing process compared to standard glycols.
Aqueous coating systems requiring improved pigment dispersion and film formation.

Key Sectors