Modifiers for Polyurethanes (PUR) need to meet specific requirements to be used in urethane applications. High purity and low hydroxyl values are essential to avoid a chemical incorporation of modifiers in the polymer during the reaction of isocyanate and polyol. The tailored performance for urethanes enable to produce PUR materials with improved rebound and compression set, reduced exudation even at high loadings, low odor, outstanding color, and good mechanical properties.