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 {HEAD ~ amines} such as tridecylamine, octylamine or {TAIL ~ polyetheramine}, tetraethylenepentaamine or mixtures thereof 
such as
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 { HEAD ~ amines } such as tridecylamine , octylamine or { TAIL ~ polyetheramine } , tetraethylenepentaamine or mixtures thereof
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