Formaldehyde-free binder for mouldings

US6099773A · kind A · utility

Assignee

• BASF SE

Inventors

• Bernd Reck · Arnstadt, DE
• Eckehardt Wistuba · Bad Dürkheim, DE
• Wilhelm Friedrich Beckerle · Frankenthal (Pfalz), DE
• Axel Kistenmacher · Ludwigshafen, DE
• Robert Rupaner · Ludwigshafen, DE
• Rainer Hummerich · Worms, DE

Key dates

• Filing date: Aug 21, 1998
• Grant date: Aug 8, 2000
• Expiry date: Aug 21, 2018

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/249925
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A method for forming shaped products by mixing a formaldehyde-free aqueous binder comprising A) a free-radically polymerized polymer containing from 5 to 100% by weight of units derived from an ethylenically unsaturated acid anhydride or from an ethylenically unsaturated dicarboxylic acid whose carboxyl group can form an anhydride group, and B) an alkanolamine having at least two hydroxyl groups, with fibers or chips to form a shaped article, wherein said binder has a property of drying at 50.degree. C. in 72 hours to a film from 0.3 to 1 mm in thickness and, following a subsequent 15 minute cure at 130.degree. C. in air, has a gel content of above 50% by weight, wherein the binder includes less than 0.1% by weight, based on A)+B), of a phosphorus-containing reaction accelerant with fibers or chips.