92.
    发明专利
    未知

    公开(公告)号:DE59501324D1

    公开(公告)日:1998-02-26

    申请号:DE59501324

    申请日:1995-07-21

    Applicant: BASF AG

    Abstract: Polymer-modified mineral building materials (1) contain additive(s) of formula (I) where R = 1-5C alkyl; R , R = H or Me (must be different from one another); n = 2-9. Also claimed is polymer powder obtd. by drying an aq. polymer dispersion contg. (I), and a process for the prodn. of such powder by adding (I) to a polymer dispersion and spray drying the mixt. Also claimed are drying prepn. for mineral building materials and mineral binders contg. the polymer powder.

    95.
    发明专利
    未知

    公开(公告)号:ID17679A

    公开(公告)日:1998-01-22

    申请号:ID972536

    申请日:1997-07-21

    Applicant: BASF AG

    Abstract: PCT No. PCT/EP97/03929 Sec. 371 Date Jan. 20, 1999 Sec. 102(e) Date Jan. 20, 1999 PCT Filed Jul. 21, 1997 PCT Pub. No. WO98/03576 PCT Pub. Date Jan. 29, 1998Phenolsulfonic acid-formaldehyde condensates are used as assistants in the drying of aqueous polymer dispersions. Also described are a process for preparing polymer powders by drying, using these condensates; the polymer powders obtainable by the process; and their use as binders.

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