Abstract: Compounds of the formula R2.[(AO)n.R3]m, where R2 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; R3 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.

Abstract: Compounds of the formula R2.[(AO)n.R3]m, where R2 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; R3 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.

Abstract: Compounds of formula (I), where R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 have defined meanings ##STR1## are useful as surfactants especially in agrochemical formulations, pigment dispersions and domestic detergent formulations. Compounds where one of R.sup.1 and R.sup.2 is hydrogen and the other is C.sub.8 to C.sub.18 straight chain alkenyl group, the group --NR.sup.3 R.sup.4 is the residue of a glycamine, especially a glucamine, and R.sup.5 is --NR.sup.3 R.sup.4 as defined (especially a glycamine residue) or a group O.(AO).sub.n.R.sup.6 where AO is an alkylene oxide, especially an ethylene oxide, residue, n is especially from 3 to 50 and R.sup.6 is a C.sub.1 to C.sub.6 alkyl group, are particularly desirable.