US 2008/0188616 A1 · Method For Production of Bead Polymers With an Average Particle Size in the Range of 1 Micrometer to 40 Micrometers and Moulded Masses and Moulded Bodies Comprising Bead Polymers

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 ≧103 s−1. A polymerizable composition is used here which, in each case based on its total weight, comprises a) more than 50.0% by weight of at least one compound of the formula (I), where the radicals 1R to 6R have definitions according to the Description, b) from 0.1% by weight to 10.0% by weight of at least one crosslinking agent and c) less than 49.9% by weight of at least one compound of the formula (II) where the radicals R and 7R to 9R 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.

Claims21

Dependent claims

A 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 ≧103 s−1, in wherein a polymerizable composition is used which, in each case based on its total weight, comprises
a) more than 50.0% by weight of at least one compound of the formula (I),
where 1R is hydrogen or a linear or branched alkyl group having from 1 to 6 carbon atoms and each of the radicals 2R to 6R is, independently of the others, hydrogen, a linear or branched alkyl group having from 1 to 6 carbon atoms, or a halogen,
b) from 0.1% by weight to 10.0% by weight of at least one crosslinking agent and
c) less than 49.9% by weight of at least one compound of the formula (II)
where R is hydrogen or methyl, 7R is a linear or branched alkyl group or an optionally alkylated cycloalkyl group having from 1 to 40 carbon atoms and the radicals 8R and 9R, in each case independently of each other, are hydrogen or a group of the formula COOR′, where R′ is hydrogen or an alkyl group having from 1 to 40 carbon atoms.

3 more elements

Method For Production of Bead Polymers With an Average Particle Size in the Range of 1 Micrometer to 40 Micrometers and Moulded Masses and Moulded Bodies Comprising Bead Polymers

Life of this patent

Method For Production of Bead Polymers With an Average Particle Size in the Range of 1 Micrometer to 40 Micrometers and Moulded Masses and Moulded Bodies Comprising Bead Polymers

Life of this patent

Abstract

Claims21