HQEE is off-white flakes, chips and powder. It is hygroscopic in nature with strong aromatic odor. HQEE is manufactured in industry by ethoxylation of hydroquinone. HQEE is a symmetrical aromatic diol chain extender. It offers excellent performance with a wide range of such MDI-prepolymers and yields polyurethane elastomers that impart good tensile, elongation, hardness, modulus, and are very resistant to mechanical abrasion.