Patent ID: 7902310

Claim:
A copolymer comprising a phosphorus-containing monomer (A) of unsaturated dicarboxylic acid derivatives of the formulae (Ia) or (Ib) X is O, S, NH or N—R 2 —Y; R 2 is a linear or branched C 1 -C 20 -(hetero)alkylene radical, optionally having an O or N heteroatom and optionally also have 1 to 10 substituents selected from the group consisting of OH, OPO 3 M 2 , OPHO 2 M, NH 2 , NH—CH 2 PO 3 M 2 , N(CH 2 —PO 3 M 2 ) 2 , CZ(PO 3 M 2 ) 2 , and C 6 -C 10 -arylene radicals; Y is —N(CH 2 —PO 3 M 2 ) 2 , —CZ(PO 3 M 2 ) 2 , —OPHO 2 M or —OPO 3 M 2 ; Z is H, Hal, OH or NH 2 ; Hal is F, Cl, Br, I; M is H, Na, K, NH 4 or N(R 3 ) 4 ; R 3 is a C 1 -C 12 -alkyl radical or a C 6 -C 10 -aryl radical; and a macromonomer (B) of formula (II) wherein R 4 is H or a C 1 -C 20 -alkyl radical; R 5 is H or CH 3 ; R 6 is a single bond or an alkylene radical having from 1 to 20 C atoms; R 7 is a C 1 -C 20 -alkylene radical; R 8 is H or a C 1 -C 20 -alkyl radical; R 9 is H, a C 1 -C 20 -alkyl radical, a C 6 -C 10 -aryl radical, COR 3 , NO 2 M, SO 3 M, or PO 3 M 2 : m is 0 to 10; n is 1 to 300; p is from 0 to 300; and R 3 and M are as defined above.