本发明涉及在20℃下为固体的至少含有至少一种基于至少以下共聚单体a）至d）的共聚物的颗粒组合物：a）共轭二烯，b）α，β-不饱和腈，c）至少 一种多官能可自由基聚合的共聚单体，和d）至少一种羧基，羟基，环氧基和/或氨基官能的可自由基聚合的共聚单体，其具有5至500nm的初级颗粒的平均粒径，其特征在于 因为所述组合物具有至多33秒的根据EN DIN 6186：1998（漏斗直径15mm）的倾倒性。

Particulate, solid at 20 ° C to compositions comprising at least one copolymer based on at least the following comonomers a) to d)
a) conjugated diene,
b) α, β-unsaturated nitrile,
c) at least one polyfunctional free radical polymerizable comonomer and
d) at least one carboxyl, hydroxyl, epoxy and / or Aminogruppenfunktionelles radically polymerizable comonomer

which possess an average particle diameter of the primary particles of 5 to 500 nm, characterized in that these compositions have a flowability in accordance with DIN EN 6186: 1998 have (funnel diameter 15 mm) of a maximum of 33 s.