Aqueous resol solutions and preparation thereof

US5345001A · kind A · utility

Assignee

• Rutgerswerke Aktiengesellschaft · DE

Inventors

• Stephan Schröter · Essen, DE
• Achim Hansen · Zug, CH
• Arno Gardziella · Witten, DE
• Peter Adolphs · Fröndenberg/Ruhr, DE

Key dates

• Filing date: Aug 23, 1993
• Grant date: Sep 6, 1994
• Expiry date: Aug 23, 2013

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G14/08
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

An aqueous resol solution produced by an alkaline condensation of a phenolic compound with an aldehyde in a molar ratio of 1:1.5 to 2.5 with an alkali metal content of 1 to 5.0% by weight of the reaction solution, neutralizing the solution after the end of condensation at least partially with an aromatic hydroxy carboxylic acid at a temperature not greater than 50.degree. C. and then concentrating the reaction mixture which is readily dilutable with water.