124.
    发明专利
    未知

    公开(公告)号:AT328910T

    公开(公告)日:2006-06-15

    申请号:AT99958068

    申请日:1999-11-18

    Applicant: BASF AG

    Abstract: Liquid-absorbent polymers are prepared by a process for the gel and/or surface postcrosslinking of water-absorbent polymers by the polymer being treated with a surface postcrosslinking solution and being postcrosslinked and dried during and after the treatment by raising the temperature, wherein the surface postcrosslinking solution comprises as crosslinker a compound of the formula IwhereR1, R2, R3 and R4 are independently hydrogen, C1-C12-alkyl, C1-C12-alkenyl, C6-C12-aryl or C1-C12-alkoxy,R5 is C1-C16-alkyl, C1-C4-hydroxyalkyl, C6-C12-aryl, C1-C16-alkenyl or a group of the formula -(CH2)n-COOH or -(CH2)n-SO3H in the form of the acid or a respective metal salt, ammonium salt or triethanolammonium salt thereof or -(CH2-CH2-O-)m-R6,R6 is hydrogen or C1-C16-alkyl,n is from 1 to 10,m is from 1 to 20dissolved in an inert solvent,and are used in hygiene articles, packaging materials and nonwovens.

    125.
    发明专利
    未知

    公开(公告)号:DE102004051242A1

    公开(公告)日:2006-05-04

    申请号:DE102004051242

    申请日:2004-10-20

    Applicant: BASF AG

    Abstract: Water-absorbent polymer particles with a centrifugal retention capacity (CRC) of at least 26 g/g and a transport value (TW) of at least 15000 cm 3>.s, where TW is the product of saline flow conductivity and wick absorption after 60 minutes multiplied by 10 7>. Water-absorbent polymer particles (I) containing (a) unsaturated monomer unit(s) with acid groups, (b) crosslinker unit(s), (c) optionally one or more ethylenic and/or allylic unsaturated comonomer unit(s), (d) optionally one or more water-soluble polymers onto which monomers (a)-(c) are at least partly grafted, and (e) converted post-crosslinker(s). These particles (I) show a centrifugal retention capacity (CRC) of at least 26 g/g and a transport value (TW) of at least 15000 cm 3>.s, where TW = the product of fluid transfer (saline flow conductivity; SFC) and wick absorption after 60 minutes (DA60) multiplied by 10 7>, and DA60 = the amount of 0.9 wt% sodium chloride solution absorbed by 70 g (I) in 60 minutes in a circular vessel with an internal diameter of 6 cm, closed at the bottom with a sieve plate of mesh size 36 microns which is in unpressurised contact with 0.9 wt% NaCl solution. Independent claims are also included for (1) a method for the production of (I) by making a graft copolymer from components (a)-(d), drying and classifying the copolymer, treating with crosslinker (e), drying and thermally crosslinking (2) hygiene articles containing (I) .

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