abstract |
Spherical particles with a mean diameter in the range 1 to 20 μm, containing: a) 85 to 99 wt. % of a cross-linked statistical copolymer with a glass temperature T9 in the range -75 to -40°C and b) 1 to 15 wt. % of at least one organic substance, selected from waxes, protective colloids and plasticisers. |