Joint sealants with early resistance to rain-water

    公开(公告)号:DE4024551A1

    公开(公告)日:1992-02-06

    申请号:DE4024551

    申请日:1990-08-02

    Applicant: HENKEL KGAA

    Abstract: Joint sealing cpds. (I) with early rain resistance are claimed, contg. aq. polymer dispersions (II) and non-ionic cellulose ethers (III) (hydroxyethyl-, hydoxyethyl-methyl-, hydroxypropylmethyl- or hydroxypropyl-cellulose), with fillers and conventional additives, such as pigments, plasticisers, extenders, thickeners, foam suppressants, dispersants, pH regulators, preservatives, and anti-ageing additives as required, including at least one conventional organic liq. additive (IV); (I) are produced by mixing (II) with the other components, the novelty being that (III), in retarded and/or non-retarded form, is incorporated in the form of a premixed slurry with (IV). Process comprises mixing the usual additives (except the pH regulator) with (II), adding the slurry of (III) in (IV) (e.g. the liq. plsaticiser), then incorporating the filler and the pH regulator. (II) contain film-forming polyacrylates and/or acrylate copolymers, EVA, butadiene-styrene, vinyl acetate/maleic ester, silicone, urethane, vinyl acetate/methacrylic acid/chloro-prene or -isoprene polymers or copolymers, or polysulphides. (I) contain 25-90 wt.% (pref. 25-40 wt.% in highly-filled prods.), 0-60 (pref. 2-60) wt.% filler, 0-1 (pref. 0.3-0.5) wt.% wetting agent, 0-20 (pref. 5-15) wt.% plasticiser, and upto 1 wt.% (III)..

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