Patent ID: 9249240
Filing Date: 2016-02-02
CPC Classification: C08F,C08G,C08L,C09D,D21H

Claim Text:
1. A graft polymer, comprising: one or more alkylenimine units as side chains, said alkylenimine units consisting of oligoalkylenimine side chains; and a grafting base selected from the group consisting of a polymer comprising vinylamine units, a polyamine, a polyamidoamine and a polymer of ethylenically unsaturated acids, wherein: the alkylenimine units do not include any detectible aziridine groups; the oligoalkylenimine side chains are grafted to the grafting base by a grafting-onto process in which an oligoalkylenimine comprising a terminal aziridine group reacts with a functional monomer unit in the grafting base; the oligoalkylenimine comprising the terminal aziridine is formed by polymerizing ethylenimine; the oligoalkylenimine side chains are represented by formula (III): p is 0 or an integer greater than zero; q and r independently of one another, are integers greater than 0; a sum p+q+r+1=n, where n is at least 3; R′ and R″ independently represent hydrogen or a monovalent organic radical; and the grafting base is not a polyethyleneimine.