Harry C Robbins

US Patent:

48554405, Aug 8, 1989

Filed:

Feb 16, 1988

Appl. No.:

7/155768

Inventors:

Dale F. Shumway - Janesville WI
Harry C. Robbins - Janesville WI

Assignee:

Sherex Chemical Company, Inc. - Dublin OH

International Classification:

C07D23304

US Classification:

548353

Abstract:

Disclosed is a method for stabilizing the color of liquid imidazolines which comprises pre-treating a polyamine with an effective amount of a hydride, preferably a borohydride, followed by its reaction with a fatty acid or ester thereof under amide-forming reaction conditions to make an amide intermediate, followed by subjecting said amide intermediate to imidazoline-forming reaction conditions to make said color-stablized imidazoline product.