41.
    发明专利
    未知

    公开(公告)号:BRPI0408252A

    公开(公告)日:2006-03-01

    申请号:BRPI0408252

    申请日:2004-03-05

    Applicant: BASF AG

    Abstract: The use of polyacrylic acid (I) with an average mol. wt. (M w) of 5000-30000 and with end groups containing sulfur and at least 2 carbon atoms, which is at least partly neutralised with alkali metal hydroxide or ammonia, as auxiliary material for the wet-milling of calcium carbonate. Independent claims are also included for finely-divided suspensions of CaCO 3 containing 0.1-2 wt% (I), obtained by wet-milling in presence of (I).

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