Preparation of amino polyols

Details Preparation of amino polyols Preparation of amino polyols

C - Chemistry, Metallurgy

08

G

403/35, 260/599.

C08G 18/58 (2006.01) C08G 18/50 (2006.01) C08G 18/54 (2006.01)

Patent

CA 1261352

PREPARATION OF AMINO POLYOLS (D#80,430-F) ABSTRACT OF THE DISCLOSURE An improved method for preparing amino polyols is disclosed. The method is the Mannich condensation of phenol, formaldehyde and diethanolamine in a molar ratio of (1:1:1), and then alkoxylation with a mixture of ethylene oxide and propylene oxide in a weight ratio of about 5:95 to 20:80 to form an amino polyol of hydroxyl number 440 to 515. The method gives higher yields of aromatic amino polyols of lower viscosity than those of the comparative example. RAM pg:EX7E/yy pg:EX7E/yy

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