Process for producing woody moldings

Details Process for producing woody moldings Process for producing woody moldings

1987-03-05

1991-10-08

Theisen, Mary Lynn

Plastic and nonmetallic article shaping or treating: processes

Forming articles by uniting randomly associated particles

524 13, 524 14, 525 543, 527103, C08G 6348, C08H 504, C08J 506

Patent

active

050552473

ABSTRACT:
An industrially advantageous woody molding is produced by adding a dibasic acid anhydride to a woody material such as a wood meal in the presence or absence of a catalyst such as sodium carbonate, whereby the dibasic acid anhydride is bonded to the hydroxy group of the woody material to form an esterified woody material, adding thereto a compound having at least two epoxy groups in the molecule thereof, kneading well the mixture, and then heat and press molding the kneaded mixture at a temperature higher than 120.degree. C. and a pressure greater than 60 kg/cm.sup.2.
The product thus obtained by the process of this invention has a smooth and lustrous surface, has good water resistance and dimensional stability, and also is excellent in mechanical strength and hardness.

REFERENCES:
patent: 3645939 (1972-02-01), Gaylord
patent: 4285843 (1981-08-01), Mayerhoffer

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