cationic or nonionic and depending on the chemical composition may comprise 0 0001 50 by weight of the total solids present in the mixture examples of such materials are listed in table 1 by adding the surface active material to the mixture after homogenization and coalescence the final particle size is relatively unaffected where adding the material beforehand may lead to a change in the expected particle size a spherical particle is well known and is defined as a three dimensional object which has all points on the surface essentially equidistant from a central point by non spherical particle is meant a three dimensional object in which individual points on the surface have varying distances from a central point this will be seen as irregular or oblong or wrinkled shapes and surfaces the surface active material can be anionic nonionic or cationic preferred anionic surface active materials are the products of the condensation polymerization between one or more dicarboxylic acids and an aminoalcohol diamine or diol wherein at least one of the groups contained in one of the organic dicarboxylic acid chains carries a negative charge such preferred anionic surface active where r 1 may be ch 2 n or r 2 may be 5 n potassio p toluenesulfonamido sulfonylisophthalate n sodioiminiobis sulfonyl m benzoate or 5 sodioisophthalate r 3 may be chosen from the following where each n may be independently selected from the integers ranging from 1 to 5 each p may be independently chosen from the integers ranging from 0 to 5 and a ranges from 0 00 0 99 preferred nonionic surface active materials are the products of the condensation polymerization between one or more dicarboxylic acids and an aminoalcohol diamine or diol such preferred nonionic surface active materials where r 1 may.