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    VERFAHREN ZUR HERSTELLUNG VON ACRYLSÄURE-POLYMEREN
    36.
    发明公开
    VERFAHREN ZUR HERSTELLUNG VON ACRYLSÄURE-POLYMEREN 审中-公开

    公开(公告)号：EP3411416A1

    公开(公告)日：2018-12-12

    申请号：EP17702123.5

    申请日：2017-02-02

    Applicant: BASF SE

    Inventor： BARTH, Johannes ,  FONSECA, Gledison ,  FAUL, Dieter ,  ERNST, Martin ,  DETERING, Jürgen ,  LEIFELD, Ferdinand ,  TUERKOGLU, Gazi

    IPC: C08F2/10 ,  C02F5/10 ,  C08F2/38 ,  C08F220/06

    Abstract: The invention relates to a method for producing aqueous solutions of acrylic acid polymers by polymerizing acrylic acid in feed mode with a radical starter in the presence of hypophosphite in water as a solvent, wherein (i) water and optionally acrylic acid in acidic, non-neutralized form, optionally one or more ethylenically unsaturated comonomers, optionally aqueous hypophosphite solution, and optionally initiator are introduced, (ii) acrylic acid in acidic, non-neutralized form, optionally one or more ethylenically unsaturated comonomers, aqueous radical starter solution, and aqueous hypophosphite solution are added, (iii) after the end of the acrylic acid feed, a base is added to the aqueous solution, wherein the comonomer content does not exceed 30 wt% with respect to the total monomer content, characterized in that the acrylic acid, the aqueous radical starter solution, and the aqueous hypophosphite solution are added in such a way that, over a time period in which at least 75% of the acrylic acid is converted, the molar ratio x of acrylic acid to phosphorus-bonded hydrogen [AA]/[P-H] has a value x that is constant to ±0.5 and that lies in the range of 0.8 to 2.

    VERWENDUNG VON POLY(OXYALKYLEN)OXY- BZW. POLY(OXYALKYLEN)AMINOALKYLTRIALKOXYSILANEN ALS DISPERGIERMITTEL
    38.
    发明公开
    VERWENDUNG VON POLY(OXYALKYLEN)OXY- BZW. POLY(OXYALKYLEN)AMINOALKYLTRIALKOXYSILANEN ALS DISPERGIERMITTEL 审中-公开
    聚（氧化烯）OXY的使用或 聚（氧化烯）aminoalkyltrialkoxysilanes作为分散剂

    公开(公告)号：EP3052452A1

    公开(公告)日：2016-08-10

    申请号：EP14777340.2

    申请日：2014-09-30

    Applicant: BASF SE

    Inventor： ERNST, Martin ,  FESSENBECKER, Achim

    IPC: C04B24/42 ,  C04B28/00 ,  C04B28/02 ,  C08G65/336

    CPC classification number: C08G65/336 ,  C04B24/42 ,  C04B28/006 ,  C04B28/02 ,  C04B2103/408 ,  C08G2650/50 ,  Y02P40/165 ,  C04B14/42

    Abstract: The present invention relates to the use of poly(oxyalkylene)oxy- and/or poly(oxyalkylene)aminoalkyltrialkoxysilanes of the general formula (I) where the symbols and indices in the formula (I) have the following definitions: -X- is -O- or -N(R
    4 )
    2-a -; -Y- is -CH
    2 -; -z- is -O-(CH
    2 )
    d -C(R
    5 )
    2-c -; a is 1 if -X- = -O-, and 1 or 2 if -X- = -N(R
    4 )
    2-a -; b is 0 or 1; c is 0, 1 or 2; d is 0 or 1; m is selected independently from an integer from 1 to 6; p is a number from 7 to 200; R
    1 is identical or different and selected from the group consisting of methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl, tert-butyl, and phenyl; R
    2 is H or methyl; R
    3 , R
    4 , R
    5 are each identical or different and selected independently from the group consisting of H and linear or branched C
    1 -C
    6 alkyl; R
    6 is identical or different and selected independently from the group consisting of H, methyl and ethyl; and R
    7 is selected from the group consisting of H, linear or branched C
    1 -C
    6 alkyl, linear or branched C
    1 -C
    10 alkanoyl, and C
    6 -C
    10 aryloyl; as dispersants for aqueous suspensions composed of aggregates and hydraulic binders, and also to the aqueous suspensions as such. The invention also relates to a process for preparing the alkyltrialkoxysilanes, and to the alkyltrialkoxysilanes as such.

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