A curable polymer latex composition obtainable by:
(a) subjecting a monomer mixture comprising
i. at least one conjugated diene;
ii. at least one ethylenically unsaturated nitrile;
iii. optionally at least one ethylenically unsaturated acid;
iv. optionally at least one further ethylenically unsaturated compound different from any of the compounds (i)-(iii);
to free-radical emulsion polymerization in an aqueous reaction medium to form a raw polymer latex; and
(b) allowing the obtained raw latex to mature in the presence of at least one thiocarbonyl-functional compound, wherein the at least one thiocarbonyl-functional compound is present in an amount of at least 0.05 wt.-%, based on the total amount of monomers subjected to free-radical emulsion polymerization in step (a), and
(c) optionally compounding the matured polymer latex with one or more cross-linking agent. Methods for making such curable polymer latex composition or rubber articles made therefrom, respectively.
一种可固化聚合物胶乳组合物,可通过以下方法获得
(a) 将包含以下成分的单体混合物
i. 至少一种共轭二烯
至少一种
乙烯基不饱和腈; iii;
iii. 可选的至少一种
乙烯基不饱和酸
iv. 可选的至少一种不同于化合物 (i)-(iii) 的
乙烯基不饱和化合物;
在
水性反应介质中进行自由基乳液聚合,形成聚合物胶乳原料;和
(b) 使得到的生胶乳在至少一种
硫代羰基官能团化合物存在下成熟,其中至少一种
硫代羰基官能团化合物的存在量为步骤(a)中进行自由基乳液聚合的单体总量的至少 0.05 wt.-%,和
(c) 可选地将成熟的聚合物胶乳与一种或多种
交联剂复合。分别制造这种可固化聚合物胶乳组合物或由其制成的橡胶制品的方法。