(EN)
The invention relates to a method for producing an aqueous styrene-butadiene polymer dispersion by the radical aqueous emulsion-polymerisation of a monomer mixture M, containing: between 40 and 80 wt. % styrene as monomer M1; between 20 and 60 wt. % butadiene as monomer M2 and between 0 and 40 wt. %, (in relation to l00 wt. % monomers), of ethylenically unsaturated comonomers M3 that differ from styrene and butadiene, according to a monomer feed process in the presence of between 0.05 and 0.5 wt. %, (in relation to l00 wt. % monomers), of at least one hydrocarbon KW comprising between 6 and 20 C atoms, selected from compounds, which form a pentadienyl or a 1-phenylallyl radical during the abstraction of a hydrogen atom, or from alpha -methylstyrene dimers. Said method is characterised in that at least 30 % of the hydrocarbon KW is already present in the polymerisation vessel and the residual quantity of the hydrocarbon KW is fed to the polymerisation reaction during the course of the latter.
(ZH) 本发明涉及一种利用单体进料技术在基于100重量%的单体为0.05-0.5重量%的至少一种烃KW存在下通过单体混合物M的自由基水乳液聚合而制备苯乙烯-丁二烯聚合物水分散体的方法，所述单体混合物M包含40-80重量%的作为单体M1的苯乙烯，20-60重量%的作为单体M2的丁二烯，和0-40重量%的不同于苯乙烯和丁二烯的烯属不饱和共聚单体M3(基于100重量%的单体)，所述烃KW具有6-20个碳原子且选自在其氢原子被夺去之后形成戊二烯基或1-苯基烯丙基的化合物和α-甲基苯乙烯二聚体。所述方法特征在于至少30%的烃KW已经存在聚合容器中，而剩余部分的烃KW在反应过程中供入聚合反应中。