Preparation of water-soluble, nitrogen-containing condensates and their use in papermaking

US4450045A · kind A · utility

Assignee

• BASF SE

Inventors

• Otto Hertel · Ludwigshafen, DE
• Friedrich Linhart · Heidelberg, DE
• Emil Scharf · Ludwigshafen, DE

Key dates

• Filing date: Sep 10, 1982
• Grant date: May 22, 1984
• Expiry date: Sep 10, 2002

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D21H21/10
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Water-soluble, nitrogen-containing condensates are prepared by reacting a cross-linking agent, obtained by PA0 (a) condensing 1 mole of a dicarboxylic acid of 4 to 10 carbon atoms with from 1 to 2 moles of a polyalkylenepolyamine, having 3-10 basic nitrogen atoms in the molecule, to give a polyamidoamine and PA0 (b) reacting the polyamidoamine with epichlorohydrin and/or dichlorohydrin in aqueous solution at a pH of from 4.5 to 8.5 and at below 100.degree. C., from 1 to 130 parts by weight of epichlorohydrin and/or dichlorohydrin being employed per 100 parts by weight of the polyamidoamine from (a), with ammonia, a primary amine, a polyamine containing 2 to 4 N atoms, a polyether-amine or a polyamidoamine in aqueous solution at below 100.degree. C. The condensates are used as retention aids, flocculants and drainage aids in papermaking.