Block copolymers organophosphate, their salts and their use as emulsifiers and dispersants

The invention relates to the use of particular organophosphate as emulsifiers and dispersants for pigments and fillers, based on polystyrene block (b) -polyalkylene copolymers. DOLLAR A subject matter of the invention are block copolymers of organophosphate and salts thereof of the general formula (I) DOLLAR A [R · 1 · O (SO) ¶a¶ (EO) ¶b¶ (CH¶2¶CHCH¶3¶O) ¶c ¶ (BO) ¶d¶] ¶x¶P- (OH) ¶3-x¶ DOLLAR DOLLAR a wherein a R1 = a straight-chain or branched or cycloaliphatic radical having 1 to 22 carbon atoms, SO = styrene oxide a DOLLAR, DOLLAR a EO = ethylene oxide, DOLLAR A BO = butylene oxide and DOLLAR A a = 1 to = a + c + d.