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    3.
    发明专利
    未知

    公开(公告)号：DE4228159A1

    公开(公告)日：1994-03-03

    申请号：DE4228159

    申请日：1992-08-25

    Applicant: BASF AG

    Inventor： FUNHOFF ANGELIKA DR ,  MC KEE GRAHAM EDMUND DR ,  HARTMANN HEINRICH DR ,  BAUR RICHARD DR ,  KUD ALEXANDER DR ,  SCHWENDEMANN VOLKER DR

    IPC: C08G2/12 ,  C08G2/18 ,  C08G2/28 ,  C08G2/30 ,  C08G4/00 ,  C08G12/18 ,  C09K23/00 ,  C09K23/52 ,  C11D3/37 ,  C08G2/24 ,  B01F17/52 ,  C02F1/56 ,  C02F5/10

    Abstract: A process for the production of polyacetals by the copolymerisation of glyoxylic acid esters with cyclic formals derived from dioles, homopolymers of formaldehyde, trioxepane or mixture of these compounds, in which up to 50 wt % of this group of monomers may be replaced by other conventional copolymerisable monomers like epoxides, aldehydes with at least 2 C atoms, tetrahydrofurane and/or C2 to C4 olefines, in the presence of anionic or cationic polymerisation initiators and possibly the hydrolysis of the glyoxyl acid esters polymerised into the copolymer, use of the polyacetal carboxylates thus obtainable as an additive in low-phosphate and phosphate-free washing and cleaning agents, as a water treatment agent and as a dispersant for finely divided substances, and polyacetals which are obtainable by the anionically or cationically initiated copolymerisation of glyoxyl acid esters with cyclic formals derived from diols and possibly the introduction of stable final groups and possibly hydrolysis of the ester groups of the glyoxyl acid esters polymerised into the copolymers.

    5.
    发明专利
    未知

    公开(公告)号：DE4106354A1

    公开(公告)日：1992-09-03

    申请号：DE4106354

    申请日：1991-02-28

    Applicant: BASF AG

    Inventor： FUNHOFF ANGELIKA DR ,  SEELMANN-EGGEBERT HANS-PETER D ,  HARTMANN HEINRICH DR ,  BAUR RICHARD DR ,  SCHWENDEMANN VOLKER DR ,  KUD ALEXANDER DR ,  BERTLEFF WERNER DR

    IPC: C08G2/10 ,  C08G2/14 ,  C08G2/18 ,  C11D3/37

    Abstract: Polyacetals containing units of formula (I), wherein R stands for H, C1-C4 alkyl or COOM, where M stands for a C1-C4 alkyl, alkali metal, ammonium and alkanolamine group, and m = 0 to 9, with K-values (determined by the H. Fikentscher method on the sodium salt in a 1 wt. % aqueous solution at 25 DEG C and pH 7) of at least 8.5. Method of preparing the polyacetals by polymerization of compounds of formula (II), wherein R stands for H, C1-C4 alkyl or COOM, where M stands for a C1-C4 alkyl, alkali metal, ammonium and alkanolamine group, R stands for C1-C4 alkyl and m = 0 to 9, in the presence of initiators and possibly comonomers, and, possibly, hydrolysis of the ester groups of the polymers. Use of the polyacetals as additives in washing and cleaning agents.

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