in the flask used in example 1 were placed 10 g of a homopolymer of methacrylamidopropyltrimethylammonium chloride as dispersant , 120 g of ammonium sulfate and 270 g of deionized water.
100 g of acrylamidopropyldimethylbenzylammonium chloride was added to the solution which was heated up to 50° C. and the atmosphere in the flask was replaced with nitrogen.