The invention relates to multiphasic polymers comprising from 45% to 95% by weight of a first polymer P1 and from 5% to 55% by weight of a second polymer P2, said polymers P1 and P2 being of distinct compositions,
said polymer P1 being obtained by polymerization from a mixture of monomers comprising at least one anionic monomer (a) having a polymerizable vinyl group, at least one nonionic hydrophobic monomer (b) having a polymerizable vinyl group, at least one cross-linking monomer (c) and at least one associative monomer (d) having a polymerizable vinyl group and a hydrophobic hydrocarbon chain and
said polymer P2 being obtained by polymerization from a mixture of monomers comprising at least one anionic monomer (a′) having a polymerizable vinyl group, at least one nonionic hydrophobic monomer (b′) having a polymerizable vinyl group and at least one cross-linking monomer (c′).
It also relates to a method for the preparation of these polymers, to aqueous compositions comprising them and to their use as thickening and suspending agents.
本发明涉及多相聚合物,包括 45% 至 95% (按重量计)的第一种聚合物 P1 和 5% 至 55% (按重量计)的第二种聚合物 P2,所述聚合物 P1 和 P2 具有不同的成分、
所述聚合物 P1 由单体混合物聚合而成,单体混合物包括至少一种具有可聚合
乙烯基的阴离子单体 (a)、至少一种具有可聚合
乙烯基的非离子疏
水单体 (b)、至少一种交联单体 (c) 和至少一种具有可聚合
乙烯基和疏
水烃链的缔合单体 (d),以及
所述聚合物 P2 是由至少一种具有可聚合
乙烯基的阴离子单体 (a′)、至少一种具有可聚合
乙烯基的非离子疏
水单体 (b′) 和至少一种交联单体 (c′) 的单体混合物聚合而成。
本发明还涉及这些聚合物的制备方法、含有这些聚合物的
水性组合物以及它们作为
增稠剂和悬浮剂的用途。