Patent ID: 7943058

Claim:
A tagged scale-inhibiting polymer comprising scale inhibiting structural units and tagging structural units, wherein the tagging units comprise units formed from a monomer having the following formula: X 2 C═CYY′, wherein: the radicals X, which may be identical or different, are each a hydrogen atom, or a C 1 -C 4 alkyl radical, Y is a hydrogen atom or a C 1 -C 4 alkyl radical, Y′ is a radical having the formula -L-Arom, wherein: L is a covalent bond or a divalent organic linking group optionally comprising heteroatoms, and Arom is a group comprising at least two conjugated aromatic rings, said rings comprising conjugated carbon atoms, and optionally nitrogen or oxygen atoms, and, linked to said carbon atoms, hydrogen atoms or said carbon atoms being optionally substituted.