NH4 SSL-PF thermosetting resin and method of binding lignocellulosic material employing same

摘要

A low cost method of binding lignocellulosic materials utilizing a novel ammonium based spent sulphite liquor, with phenol and formaldehyde or phenol-formaldehyde thermosetting resin as the binder is disclosed. Phenol-formaldehyde which normally reacts with ammonium lignosulfonate under acidic conditions and is unstable under these conditions, can be dispersed or otherwise held in suspension and can be mixed direct with the material by spraying. The constituants of the novel binder can also be mechanically dispersed when in dry powder form. The binder has improved adhesion characteristics and a shorter cure time over existing binders using a spent sulphite liquor base when in combination with phenol-formaldehyde.