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    3.
    发明专利
    未知

    公开(公告)号：DE19518620C2

    公开(公告)日：1998-04-09

    申请号：DE19518620

    申请日：1995-05-24

    Applicant: DEGUSSA

    Inventor： BUCHHOLZ STEFAN DR ,  DORN KLAUS DR ,  HARDT REINHOLD

    IPC: C11D3/22 ,  C08F251/00 ,  C11D3/37

    Abstract: Water-soluble graft copolymers of monosaccharides, oligosaccharides, polysaccharides and their derivatives are obtained by radically initiated copolymerisation of (A) monomer mixtures of (a) more than 40-100 % by weight of at least one alpha - beta -unsaturated aldehyde having general formula (I), in which R stands for hydrogen or linear or branched C1-C4 alkyl, and R stands for hydrogen or methyl, (b) 0-60 % by weight of monoethylenically unsaturated monomers different from (a) but copolymerisable with (a), and (c) 0-5 % by weight of at least two ethylenically unsaturated monomers having no conjugated double bonds in their molecule, in the presence of (B) monosaccharides, oligosaccharides, polysaccharides, polysaccharides decomposed by oxidation, hydrolysis or enzymes, chemically modified mono-, oligo- or polysaccharides or mixtures of said compounds; and (C) one or several oxidants. The weight ratio between (A) and (B) extends from (95: 20) to (5: 80) and the weight ratio between (C) and (A) + (B) extends from (5: 100) to (50: 50). Used as builders or co-builders, these graft copolymers have good scale-inhibiting properties and are extremely biodegradable.

    10.
    发明专利
    未知

    公开(公告)号：DE19518620A1

    公开(公告)日：1996-11-28

    申请号：DE19518620

    申请日：1995-05-24

    Applicant: DEGUSSA

    Inventor： BUCHHOLZ STEFAN DR ,  DORN KLAUS DR ,  HARDT REINHOLD

    IPC: C11D3/22 ,  C08F251/00 ,  C11D3/37

    Abstract: Water-soluble graft copolymers of monosaccharides, oligosaccharides, polysaccharides and their derivatives are obtained by radically initiated copolymerisation of (A) monomer mixtures of (a) more than 40-100 % by weight of at least one alpha - beta -unsaturated aldehyde having general formula (I), in which R stands for hydrogen or linear or branched C1-C4 alkyl, and R stands for hydrogen or methyl, (b) 0-60 % by weight of monoethylenically unsaturated monomers different from (a) but copolymerisable with (a), and (c) 0-5 % by weight of at least two ethylenically unsaturated monomers having no conjugated double bonds in their molecule, in the presence of (B) monosaccharides, oligosaccharides, polysaccharides, polysaccharides decomposed by oxidation, hydrolysis or enzymes, chemically modified mono-, oligo- or polysaccharides or mixtures of said compounds; and (C) one or several oxidants. The weight ratio between (A) and (B) extends from (95: 20) to (5: 80) and the weight ratio between (C) and (A) + (B) extends from (5: 100) to (50: 50). Used as builders or co-builders, these graft copolymers have good scale-inhibiting properties and are extremely biodegradable.

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