Adhesive for the manufacture of plywood, particle boards, fiber boards and similar products
AssigneeOy Keskuslaboratorio-Centrallaboratorium AB
InventorsKaj G. Forss, Agneta G. M. Fuhrmann
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Abstract
An adhesive for the manufacture of plywood, fiber board, particle board, and similar products, and containing the combination of phenol formaldehyde resin, and a lignin derivative, such as lignosulfonates, or alkali lignins. According to the invention a minimum of 65% by weight of the lignosulfonates and a minimum of 40% by weight of the alkali lignins have relative molecular weights in excess of that of Glucagon.
Claims19
An adhesive for the manufacture of wood products, comprising the combination of (a) a lignin derivative selected from the group consisting of lignosulfonates and alkali salts of alkali lignins, a minimum of 65% by weight of the lignosulfonates and a minimum of 40% by weight of the alkali lignins having a relative molecular weight as determined by gel chromatography in excess of that of glucagon, and (b) a phenol formaldehyde resin.
An adhesive for the manufacture of wood products, comprising the combination of alkali salts of alkali lignins and a phenol-formaldehyde resin, a minimum of 45% by weight of the alkali lignins having a relative molecular weight as determined by gel chromatography in excess of that of glucagon, a water solution of said adhesive having a pH in excess of 7.0.
An adhesive for the manufacture of wood products, comprising the combination of alkali salts of alkali lignins and a phenol-formaldehyde resin, a minimum of 35% by weight of the alkali lignins having a molecular weight as determined by gel chromatography in excess of 5000, a water solution of said adhesive having a pH in excess of 7.0.
An adhesive for the manufacture of wood products, comprising the combination of lignosulfonates and a phenol-formaldehyde resin, a minimum of 70% by weight of the lignosulfonates having a relative molecular weight as determined by gel chromatography in excess of that of glucagon.
An adhesive for the manufacture of wood products, comprising the combination of lignosulfonates and a phenol-formaldehyde resin, a minimum of 55% by weight of the lignosulfonates having a molecular weight as determined by gel chromatography in excess of 5000.
Dependencies are inferred from the claim text.