Method of producing press-moulding materials with polyisocyanate binders and using latent, heat-activable catalysts

US6007649A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Peter Haas · Brisbane, AU
• Peter Vehlewald · Leichlingen, DE
• Peter Kasperek · Much, DE

Key dates

• Filing date: Jul 22, 1998
• Grant date: Dec 28, 1999
• Expiry date: Jul 22, 2018

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D249/08
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process is described for producing pressed materials, particularly wood particle boards, by the hot compaction of raw materials containing lignocellulose which are mixed and/or impregnated with polyisocyanates as binders, with the use of latent, thermally activatable catalysts, wherein ammonium salts from the reaction of amines with malonic acid are used as catalysts.