USE OF POLYACRYLIC ACIDS AS GRINDING AIDS FOR CALCIUM CARBONATE

    公开(公告)号:CA2518622A1

    公开(公告)日:2004-09-23

    申请号:CA2518622

    申请日:2004-03-05

    Applicant: BASF AG

    Abstract: The invention relates to the use of polyacrylic acids which contain organic terminal groups containing sulphur, comprising at least two carbon atoms, having an average molecular weight Mwof 5 000 - 30 000 g/mol and which are a t least partially neutralised by a base which is selected from the group of alkali hydroxides and ammonia as auxiliary agents for wet grinding of calciu m carbonate. The invention also relates to fine particle aqueous suspensions o f calcium carbonate which are produced by wet grinding of calcium carbonate in the presence of said polyacrylic acids.

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