Patent ID: 6673890
Filing Date: 2004-01-06
Classification: C08G,C11D

Abstract:
A zwitterionic polyamine, comprising:a linear or branched hydrophobic polyamine backbone having 2 to 10 tertiary amino nitrogen atoms and a spacer between two tertiary nitrogen atoms, wherein the spacer is selected from the group consisting of C8-C16-alkylene, C5-C15-cyloalkylene, wherein in formulae I, II and IIIB is C2-C16-alkylene or C5-C15-cycloalkylene, D is C4-C16-alkylene or C5-C15-cycloalkylene, o is 1 or 2, p is 3 to 8, wherein in formula IVR is C1- to C22-alkyl or C7-C22-aralkyl, and n is an integer of from 3 to 6, wherein at least one tertiary amine end group of the polyamine backbone contains two groups having the following formulae wherein in formulae V and VIA is an ethylene oxide unit, a propylene oxide unit, a unit of butylene oxides or 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€ƒwith the proviso that in formula VI one X may also be hydrogen, and M is hydrogen, alkali metal or ammonium, or wherein at least one tertiary amine end group of the polyamine backbone contains a) one group of formulae V or VI and b) one group selected from the group consisting of C1- to C22-alkyl and C7-C22-aralkyl;wherein A and n are the same as defined in formulae V or VI; wherein said zwitterionic polyamine has a weight average molecular weight of up to 9000 and optionally contains up to 100% of the nitrogen atoms in quaternized form.