equals 4 u2212 y sorbitol alkoxylates were prepared by siltech llc of dacula ga they are made by addition of ethylene oxide propylene oxide or mixtures thereof to sorbitol they conform to the following structure r 2 is u2014 ch 2 ch 2 o a u2014 ch 2 ch ch 3 o b u2014 h b is an integer ranging from 0 to 4 with the proviso that a b ranges from 1 to 5 fatty acids useful in the practice of the present invention are items of commerce they are available as either single components or mixtures fatty acids useful as raw materials in the preparation of the compounds of the present invention are commercially available from a variety of sources including procter and gamble of cincinnati ohio the structures are well known to those skilled in the art in addition to the ratio of polyoxyalkylene groups to fatty group and the linkage group chosen it is very important for the practice of the current invention resulting in compounds of the present the reaction of all of the hydroxyl groups to make esters is very important the presence of unreacted hydroxyl groups in the compounds of the present invention is undesirable the compounds of the present invention have very low amount of unreacted hydroxyl groups to the specified number of grams of the specified.