Hydroquinone bis(2-hydroxyethyl) ether

Hydroquinone bis(2-hydroxyethyl) ether (CAS 104-38-1), commonly known as HQEE, is a difunctional diol used as a chain extender and reactive intermediate in polymer systems. It is also recognized commercially as 1,4-Bis(2-hydroxyethoxy)benzene. Its aromatic diol structure makes it a preferred building block for producing rigid, high-performance polyurethane and polyester materials. HQEE is primarily used as a chain extender in cast polyurethane elastomers.

In these applications, it improves hardness, load-bearing capacity, and thermal resistance in finished parts such as industrial wheels, rollers, and mining screens. It is essential for heavy-duty industrial components. In printing and packaging, it contributes to the formulation of high-durability inks and coatings where chemical resistance is a key performance requirement. This ensures longevity in harsh environments.

Formulators in the personal care sector incorporate it into film-forming systems and specialty polymer bases. It also functions as a reactive diol in polyester synthesis for various industrial resins. Its aromatic backbone raises the glass transition temperature of the final resin, enhancing structural integrity. HQEE is supplied as a white to off-white solid, typically in flake or granular form.

It is available in technical and polymer grades, with purity specifications commonly at 99% or higher. Packaging options generally include bags and drums suited to industrial-scale procurement needs.