Lignin-based glue

Details Lignin-based glue Lignin-based glue

1979-12-11

1981-09-29

Neilsen, Earl A.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C08H 502, C08G 808, C08G 1232

Patent

active

042922160

ABSTRACT:
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.

REFERENCES:
patent: 3216839 (1965-11-01), Webster
patent: 3285801 (1966-11-01), Sarjeant
patent: 3864291 (1975-02-01), Enkvist
patent: 4105606 (1978-08-01), Forss et al.

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