| abstract |
Compounds of the formula R 2 .[(AO) n .R 3 ] m , where R 2 is a residue of a group having at least m active hydrogen atoms derived from hydroxyl and/or amino and/or amido groups, AO is alkyleneoxy, n is 2 to 200; R 3 includes residue(s) of alkenyl succinic acids and optionally other acids, and m is 2 to 10, but when m is 2 there are other restrictions in the definitions, are disclosed as useful thickeners and/or dispersants in aqueous systems. The use of such materials as thickeners is also disclosed. |