Water soluble branched block copolymers
OwnerWerner Jaeger, Mathias Hahn +4inventors
InventorsWerner Jaeger, Mathias Hahn, Antje Lieske, Heike Korth, Rainer Staeck, Angelo Scordialo
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Abstract
The invention pertains to water soluble branched block copolymers comprising quaternary ammonium compounds and poly(alkylene glycols), whereby the molecular building blocks, which contain the quaternary ammonium groups, form backbone chains that are linked together in a wide mesh manner by the poly(alkylene glycol) blocks.
Claims20
Water soluble branched block copolymers that comprise polymeric backbone chains of quaternary ammonium units of general formula I
- with
- R1=H, alkyl (C1-C8)
- X−=a suitable counterion,
- whereby the backbone chains are mutually linked together by way of the feature that poly(alkylene glycol) blocks, which comprise units of general formula II
- with
- R2=H, methyl,
- R3=H, methyl, ethyl,
- X−=a suitable counterion
- n=1 through 3, and
- a=6 through 100,
- replace individual units of general formula I, and the proportion by mass of the units of general formula II is between 0.01 and 20% by weight based on the total block copolymer:
A process for the preparation of water soluble branched block copolymers via the radical polymerization of a quaternary diallylammonium compound of general formula III,
- with
- R1=H, alkyl (C1-C8)
- X−=a suitable counterion,
- and bis-acrylate esters or bis-methacrylate esters of poly(alkylene glycols) of general formula IV,
- with
- R2=H, methyl,
- R3=H, methyl, ethyl,
- X−=a suitable counterion,
- n=1 through 3, and
- a=6 through 100,
- whereby the proportion by mass of the compound of general formula IV amounts to between 0.01 and 20% by weight based on the two starting compounds.
Dependencies are inferred from the claim text.