Suitable nonionic surfactants are, for example, maleic anhydride copolymers , e.g. composed of maleic anhydride and C20 24 1 olefin, polyisobutylene succinic anhydrides or the reaction products of these with hydroxypolyethylene glycol esters, diethylaminoethanol or amines such as {TAIL ~ tridecylamine}, octylamine or polyetheramine, tetraethylenepentaamine or {HEAD ~ mixtures} thereof 
Suitable nonionic surfactants are , for example , maleic anhydride copolymers , e.g. composed of maleic anhydride and C20 24 1 olefin , polyisobutylene succinic anhydrides or the reaction products of these with hydroxypolyethylene glycol esters , diethylaminoethanol or amines such as { TAIL ~ tridecylamine } , octylamine or polyetheramine , tetraethylenepentaamine or { HEAD ~ mixtures } thereof
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