Patent ID: 6703523
Filing Date: 2004-03-09
Classification: C08G

Abstract:
A zwitterionic polyetherpolyamine comprising a linear or branched polyetherpolyamine backbone having 2 to 10 tertiary amino nitrogen atoms and a molecular weight of from 100 to 800, at least one tertiary amine end group of the polyether-polyamine backbone contains two groups having the formula whereinA means an ethylene oxide unit, a propylene oxide unit, a unit of butylene oxides and a tetrahydrofuran unit, n is a number of from 1 to 50, X is â€”SO3M, â€”CH2â€”CH2â€”SO3M, â€”CH2â€”CH2â€”CH2â€”SO3M, â€”CH2â€”CHâ€”CH2â€”SO3M, with the proviso that in formula II one X may also be hydrogen and M is hydrogen, alkali metal or ammonium, or contains one group of formula I or II and one group selected from radicals consisting of C1- to C22-alkyl and C7- to C22-aralkyl, the meaning of A and n is the same as in formula I or II, said zwitterionic polyetherpolyamine having a molecular weight up to 9,000 and containing from 25 to 1000 of the nitrogen atoms quaternized.