improved vaimennusominaisuudet a polyireenipolyoli and risiiniöljypohjaisen polyuretaanielastomeerin formation

摘要

A polyurethane elastomer compsn. contains (a) a polydiene polyol, (b) castor oil, (c) opt. a polyol with low mol. wt., and (d) a polyisocyanate with at least 2 NHCO gps., with the amt. of castor oil being sufficient to give (i) a delta tangent (tg delta) of at least 0.2, measured at the Tg of the compsn., this being at least -20 deg. C, and (ii) a Shore hardness of 30 A to 80 D according to DIN 53505.