Process for preparing bead polymers with an average particle size in the range from 1 to 40 muM, moulding compositions comprising bead polymer, and mouldings and PAMA plastisols

摘要

The present invention provides a process for preparing bead polymers having an average particle size of 1 to 40 mum, 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, andan 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; andpolymerizing to produce bead polymers having an average particle size of 1 to 40 mum.