The present invention provides a process for preparing bead polymers having an average particle size of 1 to 40 &mgr;m, which includes:
contacting:
at least one polymerizable mix which includes at least 50% by weight of at least one (meth)acrylate monomer,
at least one aluminum compound, and
an aqueous phase, to prepare a mixture;
dispersing the mixture at a shear rate≧10
3
s
−1
to form a dispersion, wherein the dispersion is stabilized by the aluminum compound; and
polymerizing to produce bead polymers having an average particle size of 1 to 40 &mgr;m.
本发明提供了一种制备平均粒径为 1 至 40 &mgr;m 的珠状聚合物的工艺,该工艺包括:
接触
至少一种可聚合的混合物,其中包括至少一种(甲基)
丙烯酸酯单体,按重量计至少占 50%、
至少一种铝化合物,以及
水相,以制备混合物;
以剪切速率≧10 分散混合物
3
s
-1
形成分散体,其中分散体由铝化合物稳定;以及
聚合生成平均粒径为 1 至 40 微米的珠状聚合物。