| abstract |
The present invention is directed to a class of polymer comprising an ethylene alpha-olefin interpolymer having a set of chemical-physical properties rendering it particularly suitable as the 'polymer backbone' for production of dispersants of high active ingredient concentrations which active ingredients have improved properties. The ethylene alpha-olefin interpolymer of this invention comprises that class of ethylene alpha-olefin interpolymer which have a number average molecular weight of from about 300 to about 10,000; at least 90% of the polymer chains contain a unit of unsaturation and the ratio of ethenylidene (also termed a 'vinylidene') units, to ethenyl (also termed 'vinyl') units in the polymer composition is at least 3.5:1, preferably at least about 10:1. |