Patent ID: 7863388

Claim:
A functional group (Fg) containing water-soluble cationic polymer obtained by reacting (a) 0.1 to 99.9% by weight of at least one cationic base polymer of formula with (b) 0.1 to 99.9% by weight of at least one functional compound wherein Râ€² is hydrogen or C 1 -C 4 alkyl; M c represents a residue from an optional monomer (C); n, m and p are mole fractions of the repeating units of monomers (A), (B) and (C), respectively, m+n+p=1, * is a terminal group and Y âˆ’ represents an anion, where the functional compound is at least one epoxy or halohydrin compound which provides the functional group Fg as connected to at least a part of the amino groups of the base polymer, where R is hydrogen, C1 to C30 alkyl, and where the base polymer is prepared by copolymerization of at least one quaternary ammonium cationic monomer (A) and at least one monomer containing a reactive amine group (B) and optionally at least one monomer (C) other than (A) and (B), where the quaternary ammonium monomers (A) are selected from diallyldimethyl ammonium chloride, diallyldimethyl ammonium bromide, diallyldimethyl ammonium sulfates and diallyldimethyl ammonium phosphates, and where the monomers (B) are selected from diallylamines, and the weight amount of monomer A ranges from 99.8 to 50 weight percent of the base polymer.