Reducing residual monomer content in aqueous emulsion polymerised dispersions

    公开(公告)号:DE19807561A1

    公开(公告)日:1998-08-27

    申请号:DE19807561

    申请日:1998-02-23

    Applicant: BASF AG

    Abstract: Use is claimed of alpha , beta -ethylenically unsaturated carboxylic acids in reducing the residual monomer content in aqueous radical emulsion polymerisation of mixtures comprising (A) 4-8C diene(s); (B) nitrile(s) of alpha , beta -ethylenically unsaturated carboxylic acids; (C) amide(s) and/or N-methylolamide(s) of alpha , beta -ethylenically unsaturated 3-6C mono- or 4-6C di-carboxylic acids; and optionally also (D) comonomers comprising vinyl aromatics, esters of alpha , beta -ethylenically 3-6C mono- or 4-6C di-carboxylic acids with 1-12C alkanols and/or esters of vinyl alcohol with 1-20C monocarboxylic acids. The unsaturated acid is added in an amount of 0.05-2.5 (especially 0.2-1)wt.% based on monomers (A) - (D) before or during the polymerisation or before an optional post-polymerisation. Aqueous polymer dispersions thus obtained are claimed, as is also their use in impregnating textiles, leather or (especially) fleeces.

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