Process for treating wood

Details Process for treating wood Process for treating wood

1997-02-26

1998-10-20

Bell, Janyce

Coating processes

Vacuum utilized prior to or during coating

Organic base

427298, 427335, 427345, 427381, 427384, 427342, B05D 300

Patent

active

058243704

ABSTRACT:
A process for treating wood involving impregnation of the wood with a preservative followed by the heat-fixation of the preservative in the wood using a pre-heated aqueous heat transfer fluid to effect the heat fixation of the preservative. The process particularly relates to steps which are taken to reduce the level of any contamination of the aqueous heat transfer fluid resulting from any wood extractives, any unfixed preservative and/or any particulate matter (i.e. "sludge") that may be present in the fluid. The contamination is preferably reduced by incorporating in the heat transfer fluid an oxidant which will preferentially oxidize any wood extractives resulting from the contact of the treated wood with the fluid without any significant reaction occurring between the oxidant and the preservative. Useful oxidants include inorganic chlorate salts such as sodium chlorate.

REFERENCES:
patent: 4303705 (1981-12-01), Kelso
patent: 4364976 (1982-12-01), Prokofievna et al.
patent: 4927672 (1990-05-01), Prinkard
patent: 4942064 (1990-07-01), Brayman et al.
patent: 5080935 (1992-01-01), Kelso et al.
patent: 5395656 (1995-03-01), Liang
Zahora et al. (1993) Am Wood-Preservers' Asso. pp. 147-166.
Anderson, D.G. (1990) Am Wood Preservers' Asso. pp. 129-151.

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