Process for fixing wooden articles pressure treated with chromat

Details Process for fixing wooden articles pressure treated with chromat Process for fixing wooden articles pressure treated with chromat

1991-01-28

1992-02-18

Bell, Janyce

Coating processes

With post-treatment of coating or coating material

Heating or drying

427343, 427297, 427440, B05D 304

Patent

active

050893025

ABSTRACT:
This invention is directed to a process for accelerating the fixation of chromated-copper-arsenate (CCA) preservative in wooden articles. The invention particularly pertains to a process of fixing CCA in softwoods such as lodgepole pine, so that it does not leach. A process of fixing chromated-preservatives in freshly treated wood by applying moderate heat to the treated wood while initially maintaining the treated wood in a highly humid or saturated atmosphere, and subsequently maintaining the atmosphere about the freshly treated wood at a controlled equilibrium moisture content level.

REFERENCES:
patent: 4017980 (1977-04-01), Kleinguenther
patent: 4325993 (1982-04-01), Schroder
patent: 4716054 (1987-12-01), Stanek et al.
"Fundamentals on Steam Fixation of Chromated Wood Preservatives", by R. D. Peek et al., presented at Nineteen Annual Meeting of the International Research Group on Wood Preservation, Madrid, Spain, Apr. 24-29, 1988.

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