Method of making a pressible mixture of lignocellulose-containing fibers and a thermoplastic material having stronger bonding between the fibers and the thermoplastic material

US5155147A · kind A · utility

Assignee

• Werzalit AG + Co. · DE

Inventors

• Martin Dietz · Nuremberg, DE
• Bernd Asseier · Freiberg, DE

Key dates

• Filing date: Dec 6, 1989
• Grant date: Oct 13, 1992
• Expiry date: Dec 6, 2009

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L97/02
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The method of making a pressible mixture of lignocellulose-containing fibers and a thermoplastic material includes mixing the fibers with 2 to 8% by weight of a duroplastic, preferably an aminoplast or a phenoplast, 0.5 to 2% by weight of a hydrophobic agent for example, paraffin, and 2 to 10% by weight of an aqueous dispersion of methacrylate and/or polyethylene to form a pretreated fiber mixture and then subsequently mixing 100 parts by weight of the pretreated fiber mixture with from 120 to 150 parts by weight of a thermoplastic powder.