An aqueous dispersion of polymer articles each comprising (a) a syndiotactic 1,2-polybutadiene having 70% or more of its unsaturated hydrocarbon groups in the side chains and having a melting point of 70°C or higher, (b) a polymer mixture of said polybutadiene (a) and other polymer such that (a) and (b) co-exist in the same particle, or (c) a copolymer obtained by graft-polymerizing a conjugated diene and/or other polymerizable monomer on said polybutadiene (a), each of said particles having an average diameter of 10µm or less. Said aqueous dispersion can be produced by adding, to an aqueous dispersion of a first catalyst component solution, a conjugated diene monomer and a second catalyst component and polymerizing said conjugated diene monomer; the first catalyst component solution contains (A) a cobalt compound, (B) an alkali metal, an organometallic compound of a metal of Group I to III of the Periodic Table or a hydride of a metal of Group I to III of the Periodic Table, and (C) 1 to 1,000 moles, per mole of the cobalt compound (A), of a conjugated diene compound; and the second catalyst component is carbon disulfide, phenyli- bothiocyanic acid or a xanthogen compound.
一种聚合物制品的
水分散液,每种聚合物制品均包含 (a) 侧链中不饱和烃基含量为 70%或以上且熔点为 70°C 或更高的辛二碳 1,2-聚
丁二烯、(b) 聚
丁二烯(a)和其他聚合物的混合物,使(a)和(b)在同一颗粒中共存;或 (c) 通过在聚
丁二烯(a)上接枝聚合共轭二烯和/或其他可聚合单体而得到的共聚物,每个所述颗粒的平均直径为 10 微米或更小。在第一催化剂组分溶液的
水分散液中加入共轭二烯烃单体和第二催化剂组分,并聚合所述共轭二烯烃单体,即可制得所述
水分散液;第一催化剂组分溶液含有 (A)
钴化合物,(B) 碱
金属、元素周期表第 I 至 III 族
金属的有机
金属化合物或元素周期表第 I 至 III 族
金属的
氢化物,以及 (C) 每摩尔
钴化合物 (A) 含 1 至 1,000 摩尔共轭二烯化合物;以及 第二催化剂组分为
二硫化碳、苯基二
硫代
氰酸或黄原酸化合物。