Patent ID: 6939938

Claim:
At least one polymer of formula (I) below: R-X-[L-(Y) m ] r -L′-X′-R′ (I) wherein R and R′, which may be identical or different, are chosen from hydrophobic groups and a hydrogen atom; X and X′, which may be identical or different, are chosen from groups comprising at least one amine functional group chosen from tertiary and quaternary amine functional groups, optionally bearing at least one hydrophobic group; L and L′, which may be identical or different, are each chosen from groups derived from diisocyanate; Y is chosen from hydrophilic groups; r is an integer ranging from 1 to 100; m is a number ranging from 1 to 1,000, wherein the polymer comprises at least one amine functional group chosen from protonated and quaternized amine functional groups and at least one hydrophobic group, it being understood that the content of the quaternized amine unit is at least 85%.