Condensates of polyalkylenepolyamines, their preparation and their use in papermaking

US5536370A · kind A · utility

Assignee

• BASF SE

Inventors

• Guenter Scherr · Ludwigshafen, DE
• Wolfgang Reuther · Neckargemünd, DE
• Primoz Lorencak · Ludwigshafen, DE
• Dietmar Moench · Weinheim, DE
• Friedrich Linhart · Heidelberg, DE
• Juergen Weiser · Schriesheim, DE

Key dates

• Filing date: May 26, 1995
• Grant date: Jul 16, 1996
• Expiry date: May 26, 2015

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D21H21/10
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

Condensates of polyalkylenepolyamines which are obtainable by PA1 (a) partial amidation of polyalkylenepolyamines and PA1 (b) condensation of the partially amidated polyalkylenepolyamines with bifunctional or polyfunctional crosslinking agents to give crosslinked polyalkylenepolyamines which, in 20% strength aqueous solution at 20.degree. C., have a viscosity of at least 100 mPa.s, processes for the preparation of the condensates of polyalkylenepolyamines by partial amidation of polyalkylenepolyamines with carboxylic acids, carboxylic esters, carboxylic anhydrides or carbonyl halides and crosslinking of the partially amidated polyalkylenepolyamines with bifunctional or polyfunctional crosslinking agents, from 0.001 to 10 parts by weight of a crosslinking agent being used per part by weight of the partially amidated polyalkylenepolyamines, and the use of the resulting condensates as drainage aids, flocculants, retention aids and fixing agents in papermaking.