CEMENT ADMIXTURE
    1.
    发明专利

    公开(公告)号:CA1224813A

    公开(公告)日:1987-07-28

    申请号:CA457363

    申请日:1984-06-25

    Applicant: KAO CORP

    Abstract: This invention provides a cement additive comprising a copolymer of an olefin having 2 to 8 carbon atoms with an ethylenically unsaturated dicarboxylic acid anhydride and a cement additive comprising the copolymer and a water-reducing agent. The cement additive of this invention can prevent the lowering of the fluidity, or slump loss of a hydraulic cement mix such as concrete, mortar, or paste with the lapse of time and provide improved applicability and workability.

    CEMENT DISPERSANT
    2.
    发明专利

    公开(公告)号:CA1222530A

    公开(公告)日:1987-06-02

    申请号:CA441327

    申请日:1983-11-16

    Applicant: KAO CORP

    Abstract: Cement Dispersant The cement dispersant comprises a macromolecular lignosulfonic acid or a salt thereof. It may be a composition which comprises (a) said macromolecular lignosulfonic acid or a salt thereof and (b) a condensate of beta-naphthalenesulfonic acid and formaldehyde or a salt thereof. It prevents the slump loss in the cement composition.

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