Emulsion polymerization with large particle size
    2.
    发明授权
    Emulsion polymerization with large particle size 失效
    具有大颗粒尺寸的乳液聚合

    公开(公告)号:US5216065A

    公开(公告)日:1993-06-01

    申请号:US619798

    申请日:1990-11-29

    CPC分类号: C08F2/24 C08F291/00

    摘要: A process for emulsion polymerization to form a latex having a particle size greater than about 0.5 micrometers by charging to a reaction vessel under agitation a reaction mixture including water, emulsifiers at an initial concentration slightly greater than or equal to the critical micelle concentration, a protective colloid, ethylenically unsaturated monomers, and an ionically balanced combination of an anionic and a cationic water soluble free radical initiator or a nonionic initiator; reacting the mixture to form an emulsion of polymerized monomer; and adding additional monomer, emulsifier, and protective colloid and a water soluble chain transfer agent to the reactor while continuing to agitate the mixture under conditions such that the emulsifier concentration does not exceed that at which new polymeric nuclei are formed.

    摘要翻译: 一种通过在搅拌下将反应混合物(包括水,初始浓度略高于或等于临界胶束浓度的乳化剂)的反应混合物装入反应容器中,以形成粒度大于约0.5微米的胶乳的乳液聚合方法, 胶体,烯属不饱和单体和阴离子和阳离子水溶性自由基引发剂或非离子引发剂的离子平衡组合; 使混合物反应形成聚合单体的乳液; 并将另外的单体,乳化剂和保护胶体和水溶性链转移剂加入到反应器中,同时在使乳化剂浓度不超过形成新聚合物核的条件下继续搅拌混合物。