Chemistry of carbon compounds – Miscellaneous organic carbon compounds
Patent
1975-04-18
1977-05-03
Welsh, M. J.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
260 296XA, C08L 3104
Patent
active
040213986
ABSTRACT:
Staining and discoloration of painted wood surfaces, as a result of bleeding into the top or finish coat of soluble coloring matter and tannins naturally present in the wood, is prevented by coating or impregnating the wood with a basic aluminum compound, particularly with a water soluble basic aluminum halide or derivative thereof. The basic aluminum compound may be applied in aqueous solution or non-pigmented emulsion for prefinishing building lumber, or applied in the form of a pigmented emulsion as a primer coat.
The present invention relates to novel methods and compositions for application to the surfaces of woods, particularly to stain-susceptible woods, to prevent their staining or discoloring as a result of tannin and tocopherol or other waste-soluble coloring matter present in the raw wood, bleeding or migrating into a subsequently applied preservative or decorative paint film.
REFERENCES:
patent: 3438914 (1969-04-01), Krockenberger
patent: 3852087 (1974-12-01), Nordyke et al.
Gilman William S.
Jones John L.
Rubino Andrew M.
Armour Pharmaceutical Company
Barber Frank T.
Schwarze William W.
Welsh M. J.
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