3.
    发明专利
    未知

    公开(公告)号:DE19633626A1

    公开(公告)日:1998-02-26

    申请号:DE19633626

    申请日:1996-08-21

    Applicant: BASF AG

    Abstract: In a process for producing a particulate polymer P with a mean particle diameter d50 from 0.1 to 50 mu m, an emulsion E is produced from one or more monomers M which can be polymerised into the polymer P by radical polymerisation, water and at least one protective colloid SK under high shearing forces, and the emulsion E is polymerised in a reactor by using a radical polymerisation initiator RI. The process is characterised in that maximum 75 wt % of the emulsion E ("initial proportion of E") are initially fed into the reactor before polymerisation begins, and in that at least 25 wt % of the emulsion E ("added proportion of E") are only fed into the reactor after the polymerisation begins.

Patent Agency Ranking