Patent ID: 6291723
Filing Date: 2001-09-18
Classification: B01J,C07C

Abstract:
A method for making a condensation product of a hydroxyaryl and a non-conjugated diene which comprises preparing a reaction medium comprising a hydroxyaryl, a non-conjugated diene, trifluoromethanesulfonic acid and a sufficient quantity of a retarder substance which decreases but does not eliminate the catalytic activity of the acid in the reaction medium and heating the reaction medium at a temperature and time sufficient to effectuate reaction of the diene with the hydroxyaryl wherein the quantity of trifluoromethanesulfonic acid is from about 0.01% to about 1% based on the weight of hydroxyaryl and the quantity of retarder is from about 0.5 to 10 parts by weight for each part by weight of the trifluoromethanesulfonic acid and provided that water is added to the reaction medium when the retarder is solely water.