polyhydroxyl compounds based on castor oil with high reactivity, suitable for the synthesis of polyurethanes.

摘要

Polyester polyols, which comprises or consist of compounds of formula (I) wherein R1 is an alkylene or alkenylene radical, in particular a moiety having 5 to 20 C atoms and, particularly preferably, the resto ( CH2) 7-CH = CH-CH2-, R2 is hydrogen or, especially, alkyl or alkenyl with preferably 2 to 20 carbon atoms and a moiety, particularly preferably, the resto (CH2) 5-CH3, R3 is an aliphatic radical, in particular an aliphatic cyclic aromatic moiety, or, R4 represents an alkylene radical straight or branched, in particular neopentylene chain, and R5 is equal to R4, or an alkylene moiety of straight or branched chain, optionally substituted with hydroxyl groups, which differs from R4, in particular a neopentylene group or a hydroxymethyl substituted ethylene radical, or mixtures of compounds of formula (I).