Eka Aktiebolag

Kurt H Grunewald

Inge G Mansson

A glue, substantially based on chlorolignin, for gluing cellulose materials such as wood, particle board etc. Chlorolignin, which is a waste product from the cellulose industry, is an environmentally dangerous substance. It is recovered by membrane filtering of waste liquor, separating out compounds with a molecular weight lower than 1000-2000. It is then used alone, or mixed with common synthetic glues such as melamine-formaldehyde resins, fillers, hardeners etc. Formaldehyde, paraldehyde or ammonium chloride are suitable hardeners and the chlorolignin can also be prepolymerized with formaldehyde and/or paraldehyde.

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Goteborg, Sweden

Kurt H Grunewald