Process for preparing bead polymers with an average particle size in the range from 1 to 40 microns, 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 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 rate10³ 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 m.