Patent ID: 6541673
Filing Date: 2003-04-01
Classification: C07C,C08G

Abstract:
A process for the reduction of cycle time in the preparation of oxyalkylated phenolic polyols, said process comprising:a) providing a phenolic starter compound having from 2 to 10 phenolic hydroxyl groups in a reactor; b) optionally adding a portion of hydrocarbon solvent in which said phenolic starter is soluble; c) adding an oxyalkylation catalyst; d) oxyalkylating said phenolic starter with alkylene oxide(s) at a first temperature above 135Â° C. until at least 20 mol percent of total alkylene oxide has been added to said reactor; e) further oxyalkylating at a second temperature below 135Â° C., said first temperature and said second temperature differing by at least 10Â° C., wherein at least 20 mol percent of total oxyalkylation takes place at said second temperature below 135Â° C.; and f) removing hydrocarbon solvent if present.