Chemistry of carbon compounds – Miscellaneous organic carbon compounds
Patent
1978-03-27
1979-03-06
Griffin, Ronald W.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
106 2, 106 18, 106 1505, 260 23AR, 260 23H, 260 285R, 260 285A, 422 40P, C08L 2312, C08L 2506, C09D 380, C09D 514
Patent
active
041430107
ABSTRACT:
A wood preservative composition having deep penetration capability, leaving a clean surface and imparting high retention of active preservative within the wood, which consists primarily of (a) an organic wood preservative agent, (b) a hydrophobic agent, and (c) small amounts of an amorphous vinylic-type polymer, in a penetrating organic solvent. The preservative may be pentachlorophenol, an oxathiin compound or other preservative preferably of low mammalian toxicity. The hydrophobic agent may be fatty acids and their esters, fatty alcohols and paraffin waxes. The amorphous polymer may be a polystyrene, a polymethylmethacrylate, a polyvinylformal, an atactic polypropylene or other such amorphous polymer. The penetrating solvent may be most suitably chloroform, methylene chloride, trichloroethylene or liquefied petroleum gas, although others may be used. Solutions suitable for deep penetration pressure treatment are preferred. The active preservative penetrates and becomes immobilized within the penetrated wood microstructure.
REFERENCES:
patent: 3200003 (1965-08-01), Bescher
patent: 3249499 (1966-05-01), VON Schmeling et al.
patent: 3600408 (1971-08-01), Bursack et al.
patent: 3967011 (1976-06-01), Dunn et al.
American Wood-Preservers' Association Proceedings (1963), pp. 68-76.
American Wood-Preservers' Association Proceedings (1971), pp. 37-46.
Canadian Patents and Development Limited
Griffin Ronald W.
Thomson Alan A.
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