Method of joining wood products

Details Method of joining wood products Method of joining wood products

1977-08-08

1978-09-12

Anderson, Harold D.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

C09J 328, C09J 316

Patent

active

041135423

ABSTRACT:
A synthetic resin product which may be used for gluing wood products and the like comprises a lignin and a low molecular weight liquid which is capable of penetrating, swelling and reacting with the lignin to form a hardened product. The low molecular weight liquid may be a solution consisting essentially of formaldehyde and phenol and may also contain an acid or alkaline hardener. Examples of acid hardeners include ammonium chloride, paratoluene sulphonic acid and the like, whereas examples of an alkaline hardener include sodium carbonate, sodium hydroxide, ammonium hydroxide and the like. The formed resin product is very suitable as an adhesive and utilizes lignin not ordinarily suitable as an adhesive and generally regarded as a waste material.

REFERENCES:
patent: 2159411 (1939-05-01), Wallace
patent: 2259455 (1944-10-01), Caro et al.
patent: 2282518 (1942-05-01), Hochwalt et al.
patent: 3096226 (1963-07-01), Spilker
patent: 3677884 (1972-07-01), Bornstein
patent: 3931072 (1976-01-01), Coyle

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