24.
    发明专利
    未知

    公开(公告)号:DE59706811D1

    公开(公告)日:2002-05-02

    申请号:DE59706811

    申请日:1997-12-19

    Applicant: BASF AG

    Abstract: The present invention relates to the use of water soluble or water dispersible polymers containing carboxyl groups, optionally in latent form, and side-chains of general formula (I) -X-Y-[-O-(-Alk-O) n -R] k as additives in mineral building materials, wherein X, Y, Alk, R, n and k have the meanings cited in claim 1. Said polymers can be obtained by polymerizing ethylenically unsaturated monomers in the presence of compounds containing phosphorus and, optionally, by additional polymer-analogous transformation. The invention further relates to the production of said polymers and the use thereof. Also described are polymers, which can be obtained by polymerizing aromatic vinyl compounds, olefins, cycloolefins and/or dienes, as D monomers and anhydrides of ethylenically unsaturated dicarboxylic acids as E monomers and which can be used both as parent compounds for the above-mentioned polymers and as additives for mineral building materials.

    26.
    发明专利
    未知

    公开(公告)号:DE59303342D1

    公开(公告)日:1996-08-29

    申请号:DE59303342

    申请日:1993-12-22

    Applicant: BASF AG

    Abstract: The invention concerns the use, as dispersants for aqueous pigment suspensions, of partially esterified copolymers obtained by the copolymerization of (a) at least one C4 to C28 olefin and (b) ethylenically unsaturated dicarboxylic acid anhydrides with 4 to 8 C-Atoms in the molar ratio of 1:0.5 to 1:2 and the subsequent partial esterification of the copolymer with reaction products of (A) C1 to C30 alcohols, C8 to C22 fatty acids, C1 to C12 alkylphenols or secondary C2 to C30 amines and (B) at least one C2 to C4 alkylene oxide or tetrahydrofuran in the molar ratio (A):(B) of 1:2 to 1:200, and hydrolysis of the anhydride groups in the copolymer to give carboxyl groups, the partial esterification of the copolymer being carried out to an extent such that 1 to 50 % of the carboxyl groups in the copolymer are esterified. The invention also concerns pigment suspensions containing such partially esterified copolymers.

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