| abstract |
Process for preparation of bead polymers whose average particle size is in the range from 1 μm to 40 μm, by dispersing and polymerizing a polymerizable composition in an aqueous phase, where the dispersion stabilized by an aluminium compound is prepared at a shear rate ≧10 3 s −1 . A polymerizable composition is used here which, in each case based on its total weight, comprises n na) more than 50.0% by weight of at least one compound of the formula (I), n n where the radicals 1 R to 6 R have definitions according to the Description, b) from 0.1% by weight to 10.0% by weight of at least one crosslinking agent and n nc) less than 49.9% by weight of at least one compound of the formula (II) n n where the radicals R and 7 R to 9 R have definitions according to the Description The bead polymers prepared according to the inventive process are particularly suitable for production of mouldings with light-scattering properties. |