Use of low molecular weight lignin together with lignin for the production of a phenol-formaldehyde binder composition

US9469795B2 · kind B2 · utility

Assignee

• UPM-KYMMENE CORPORATION · FI

Inventors

• Sanna Valkonen · Lappeenranta, FI
• Suvi Pietarinen · Lappeenranta, FI
• Okko Ringena · Neusäß, DE
• Kati Eskelinen · Imatra, FI

Key dates

• Filing date: Mar 28, 2013
• Grant date: Oct 18, 2016
• Expiry date: Mar 28, 2033

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09J2497/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to a method for producing a binder composition, wherein the method comprises the following steps: (i) forming an aqueous composition comprising reactant components including lignin molecules of 11-60 lignin units, lignin molecules of 1-10 lignin units, polymerizable substance and crosslinking agent in the presence of a catalyst; and (ii) cooking the composition at a temperature of 60-95° C. for polymerizing the reactant components until a binder composition with a predetermined viscosity value is formed.