Particleboard, hardboard, and plywood produced in combination wi

Details Particleboard, hardboard, and plywood produced in combination wi Particleboard, hardboard, and plywood produced in combination wi

1972-08-24

1976-01-06

Czaja, Donald E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

156335, C08H 502, C08L 6110

Patent

active

039310728

ABSTRACT:
Improved lignocellulosic particleboard, hardboard, and plywood are produced using a lignin sulfonate-phenol formaldehyde glue system. Preferred products are secured by using Douglas fir chips in combination with a unique technique of blending the lignin sulfonate with a phenol and formaldehyde. A specific technique is to react lignin sulfonate with formaldehyde under influence of caustic and heat and then to react the resulting compound with phenol formaldehyde resin to secure a more effective final glue system.

REFERENCES:
patent: 2282518 (1942-05-01), Hochwalt et al.
patent: 3076772 (1963-02-01), Christ
patent: 3095392 (1963-06-01), Herrick
patent: 3296159 (1967-01-01), Lissner
patent: 3308218 (1967-03-01), Wiegand et al.
patent: 3336185 (1967-08-01), Helbing
patent: 3658638 (1972-04-01), Ludwig et al.
patent: 3677884 (1972-07-01), Bornstein
patent: 3790441 (1974-02-01), Ashall
patent: 3790442 (1974-02-01), Ashall

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