Acid-capped quaternized polymer and compositions comprising such polymer
AssigneeAkzo Nobel N.V.
InventorsRobert Lines, Clayton Price
Life of this patent
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Abstract
The invention relates to a polymer comprising quaternary ammonium and/or quaternary phosphonium groups bound to the backbone of the polymer, said quaternary ammonium groups and/or quaternary phosphonium groups being neutralised by counter-ions, wherein the counter-ions consist of the anionic residue of an acid having an aliphatic, aromatic, or alkaryl hydrocarbon group comprising 6 or more carbon atoms. The invention further relates to the preparation of this polymer, its use in anti-fouling compositions, and to anti-fouling compositions comprising the polymer.
Claims11
A sea water-insoluble polymer comprising quaternary ammonium groups and/or quaternary phosphonium groups bound to a backbone of the polymer comprising a group of formula:
- wherein
- Y is O or NH, Z is N or P, R1 is a hydrogen atom or a C1–C4 alkyl group,
- R2 is a C2 or a C3–C12 divalent hydrocarbon group,
- R3 and R4 independently represent a C1–C6 alkyl group,
- R5 is a C1–C5 alkyl group,
- said quaternary ammonium groups and/or quaternary phosphonium groups being neutralised by counter-ions that consist of the anionic residue of an acid having an aliphatic, aromatic, or alkaryl hydrocarbon group comprising 6 or more carbon atoms;
- said counter-ions being capable of hydrolyzing, dissociating or exchanging with sea water species to leave a polymer framework that is soluble in sea water.
Process for the preparation of a sea water-insoluble polymer comprising quaternary ammonium groups and/or quaternary phosphonium groups bound to the backbone of the polymer, comprising the steps of:
- quaternizing an amine- or phosphine-functional monomer of formula (I):
- wherein Y is O or NH, Z is N or P, R1 is a hydrogen atom or a C1–C4 alkyl group, R2 is a C2 or a C3–C12 alkylene group, R3 and R4 independently represent a C1–C6 alkylene group or an optionally substituted phenyl group,
- replacing a counter-ion of the quaternised ammonium or phosphonium monomer by a carboxylate group derived from an acid having an aliphatic, aromatic, or alkaryl hydrocarbon group comprising 6 or more carbon atoms and
- polymerizing at least one type of long-chain acid-capped quaternary ammonium monomer and/or at least one type of long-chain, acid-capped quaternary phosphonium-functional monomer;
- wherein said counter-ions being capable of hydrolyzing, dissociating or exchanging with sea water species to leave a polymer framework that is soluble in sea water.
Anti-fouling coating compositions comprising an ingredient having marine biocidal properties and a sea water-insoluble polymer comprising quaternary ammonium groups and/or quaternary phosphonium groups bound to a backbone of the polymer comprising a group of formula:
- wherein
- Y is O or NH, Z is N or P, R1 is a hydrogen atom or a C1–C4 alkyl group,
- R2 is a C2 or a C3–C12 divalent hydrocarbon group,
- R3 and R4 independently represent a C1–C6 alkyl group,
- R5 is a C1–C5 alkyl group,
- said quaternary ammonium groups and/or quaternary phosphonium groups being neutralised by counter-ions that consist of the anionic residue of an acid having an aliphatic, aromatic, or alkaryl hydrocarbon group comprising 6 or more carbon atoms;
- said counter-ions being capable of hydrolyzing, dissociating or exchanging with sea water species to leave a polymer framework that is soluble in sea water.
Dependencies are inferred from the claim text.