Coating processes – With post-treatment of coating or coating material – Liquid extraction of coating constituent or cleaning coating
Patent
1974-04-17
1976-11-30
Lusignan, Michael R.
Coating processes
With post-treatment of coating or coating material
Liquid extraction of coating constituent or cleaning coating
134 42, 8 65, 34 95, 34 138, 34 165, 252380, 252387, 427335, 427440, B05D 300
Patent
active
039950786
ABSTRACT:
Surface accumulation of crystalline treating agents, such as pentachlorophenol, and water insoluble extracted wood resins, developed during solvent removal after pressure impregnation, and readily removed by contacting the so treated wood while still in a heated condition with liquid solvent thereby causing ebullient boiling of the solvent at the surface effecting a cleaning action and dissolution of the removed crystalline agent in the body of the solvent. If the solvent is contacted with the hot surface and removed immediately following cessation of ebullient boiling no additional post treatment is necessary to remove solvent from the surface of the wood. If desired a light (short duration) post steaming, however, may be employed without adverse effect, i.e., bringing more treating agent to the surface which would again permit crystallization of the agent at the surface.
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patent: 3785770 (1974-01-01), Hudson
Baker Glwynn R.
Lusignan Michael R.
The Dow Chemical Company
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