| 摘要 |
<p>There is provided a method of forming an aqueous composition, said method comprising
(a) first, forming at least one aqueous polymer dispersion by a process comprising polymerizing a monomer mix comprising 5-50% by weight based on the weight of said monomer mix, of one or more carboxylic acid functional monomers;
(b) second, adding to said aqueous polymer dispersion, ingredients comprising
(i) 1 to 10 parts by weight of at least one swelling agent, based on 100 parts by weight of said monomer mix; and
(ii) one or more nonionic surfactant, anionic surfactant, or mixture thereof; and
(c) third, adding calcium cation or magnesium cation or a mixture thereof to said aqueous polymer dispersion.</p> |
