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    VERWENDUNG WÄSSRIGER POLYMERISATDISPERSIONEN ZUR VERBESSERUNG DER RESISTENZ GEGENÜBER CHEMISCHEN EINFLÜSSEN
    9.
    发明公开
    VERWENDUNG WÄSSRIGER POLYMERISATDISPERSIONEN ZUR VERBESSERUNG DER RESISTENZ GEGENÜBER CHEMISCHEN EINFLÜSSEN 有权
    使用水性聚合物提高化学试剂性

    公开(公告)号：EP2791180A1

    公开(公告)日：2014-10-22

    申请号：EP12794982.4

    申请日：2012-12-05

    Applicant: BASF SE

    Inventor： ROLLER, Sebastian ,  DERSCH, Rolf ,  DITTRICH, Uwe ,  BALK, Roelof ,  LOHMEIJER, Bas ,  TROMSDORF, Ulrich

    IPC: C08F2/22 ,  C08F265/00 ,  C08F291/12 ,  C08L33/04 ,  C08L35/00 ,  C09D133/00

    CPC classification number: C08F2/001 ,  C08F2/26 ,  C08F265/10 ,  C09D133/08 ,  C09D133/10 ,  C09D133/14 ,  C09D151/003 ,  C08F220/06 ,  C08F220/18 ,  C08F220/34

    Abstract: The present invention relates to the use of an aqueous polymer dispersion, which can be obtained by polymerising a composition (1) of compounds (monomers) having at least one ethylenically unsaturated group by means of the radical aqueous polymerisation method up to a conversion rate of at least (90), preferably at least (95) and particularly preferably at least 98% by weight, relative to the monomer composition (1) to be polymerised (polymerisation stage 1) and then, in the presence of the product mixture from polymerisation stage (1), polymerising a composition (2) of compounds (monomers) having at least one ethylenically unsaturated group, according to the method of radical aqueous emulsion polymerisation (polymerisation stage 2) with the proviso that: a) the composition (1) is to be furnished in such a way that a polymer (1) would be obtained solely through statistical co-polymerisation of the composition (1), the glass transition temperature of said polymer being Tg1 >0°C, preferably >10°C, particularly preferably >20°C, b) the composition 2 is to be furnished in such a way that a polymer 2 would be obtained solely through statistical co-polymerisation of the composition 2, the glass transition temperature of said polymer being Tg2 >80°C, preferably >100°C, c) the amount of the difference between Tg1 and Tg2 is at least 50°C, d) in addition to the monomers in compositions 1 and 2, at least one adhesive monomer different from these monomers and containing at least one ethylenically unsaturated group and the element nitrogen, is co-polymerised in a quantity of 0.1 to 10% by weight, preferably 0.5 to 5% by weight, particularly preferably 1 to 3% by weight relative to the overall quantity of the monomers to be polymerised, e) of the total quantity of the adhesive monomers to be co-polymerised in accordance with d), 20 to 100 mo. % by weight is also polymerised in polymerisation stage 1 and f) the quantity of the composition i, which is to be assigned to the lower threshold value Tgi, relative to the overall quantity of compositions 1 and 2, is 60 to 90% by weight, preferably 70 to 85% by weight, g) and in addition to the monomers in compositions 1 and 2, at least one of one monomer different from said monomers, selected from the group of itaconic acid, acetoacetoxyethyl(meth)acrylate (AAEM), acrylonitrile in a quantity of 0.2 to 2% by weight relative to the overall quantity of the monomers to be polymerised, preferably in polymerisation stage (1), is co-polymerised for the coating compositions with improved resistance to chemicals.

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