3.
    发明专利
    未知

    公开(公告)号:ES2217142T3

    公开(公告)日:2004-11-01

    申请号:ES01927814

    申请日:2001-03-27

    Applicant: BASF AG

    Abstract: Polymers containing acid groups are modified by reaction of(a) polymers which comprise at least 5% by weight of a copolymerized monoethylenically unsaturated monomer containing acid groups, have molar masses of from 200 to 100,000 and are obtainable by free-radical polymerization of monoethylenically unsaturated acids in aqueous solution in the presence or absence of other monoethylenically unsaturated monomers and in the presence of at least 4% by weight, based on the monomers used in the polymerization, of a water-soluble sulfur compound in which the sulfur is in the oxidation state +4,with(b) polyalkylene glycols which are end-capped at one end, alkylpolyalkylene glycol amines or mixtures thereof, or mixtures of at least one of the two compounds specified with up to 30% by weight, based on the mixtures, of ammonia, amines, alcohols, hydroxycarboxylic acids or aminocarboxylic acidsat up to 250° C.

    METHOD FOR MODIFYING ACID GROUP CONTAINING POLYMERS

    公开(公告)号:CA2403878A1

    公开(公告)日:2001-10-04

    申请号:CA2403878

    申请日:2001-03-27

    Applicant: BASF AG

    Abstract: The invention relates to a method for modifying acid group containing polyme rs by reacting, at temperatures of up to 250 ~C, a) polymers that contain polymerized into them at least 5 wt.- % of a monomer that contain monoethylenically unsaturated acid groups, that have a molecular weight ranging between 200 to 100.000 and that are obtainable by radical polymerization of monoethylenically unsaturated acids, optionally in the presence of another monoethylenically unsaturated monomer in an aqueous solution in the presence of at least 4 wt.- %, based on the monomers used fo r the polymerization, of a water-soluble sulfur composition in which the sulfu r has the oxidation number +4, with b) unilaterally end-group terminated polyalkylene glycols, alkylpolyalkyene glycolamines or the mixtures thereof. The invention also relates to the mixtures of at least one of said compounds with up to 30 wt.- %, based on the mixtures, of ammonia, amines, alcohols, hydroxycarboxylic acids or aminocarboxylic acids.

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