Wood preservative containing alkali metal cyanides
AssigneeKoppers Company, Inc.
InventorRobert E. Stutz
Life of this patent
Estimating the term…
Abstract
An alkali metal cyanide added to alkaline borate buffered liquid fungicide concentrates of chlorophenates and organic or inorganic salts of mercury, lead, tin, copper and zinc provides a non-linial enhancement of fungistatic performance when used in the treatment of lumber and veneer and improved stability of the concentrates.
Claims8
A wood preservative composition comprising (1) from about 0.001% to 40% by weight of an alkali metal cyanide selected from the group consisting of lithium cyanide, sodium cyanide and potassium cyanide;
- (2) from about 20% to about 90% by weight of water;
- (3) from about 0.05% to about 18% by weight of an alkali metal hydroxide selected from the group consisting of lithium hydroxide, sodium hydroxide and potassium hydroxide;
- (4) from about 1% to about 22% by weight of an alkali metal borate selected from the group consisting of lithium borate, sodium borate and potassium borate;
- (5) from about 3% to about 15% by weight of an alkanol having from 1 to 4 carbons;
- (6) from about 3% to about 20% by weight of an organic solvent selected from the group consisting of acetone, methylethyl ketone, ethylene glycol, propylene glycol, glycerol, di-propylene glycol, tri-propylene glycol, ethylene glycol methyl ether, di-ethylene glycol methyl ether, propylene glycol methyl ether and di-propylene glycol methyl ether;
- (7) from about 5% to about 40% by weight of a halogenated phenol and (8) from about 0.005% to about 5% by weight of a heavy metal salt or oxide selected from the group consisting of inorganic and organic salts of mercury, lead, tin, copper, zinc, cadmium, arsenic, antimony and silver, and oxides of mercury, lead, tin, copper, zinc, cadmium, arsenic, antimony and silver.
A wood preservative composition comprising (1) from about 0.001% to 40% by weight of an alkali metal cyanide selected from the group consisting of lithium cyanide, sodium cyanide and potassium cyanide;
- (2) from about 20% to about 90% by weight of water;
- (3) from about 0.05% to about 18% by weight of an alkali metal hydroxide selected from the group consisting of lithium hydroxide, sodium hydroxide and potassium hydroxide;
- (4) from about 1% to about 22% by weight of an alkali metal borate selected from the group consisting of lithium borate, sodium borate and potassium borate;
- (5) from about 3% to about 15% by weight of an alkanol having from 3 to 4 carbons;
- (6) from about 3% to about 20% by weight of an organic solvent selected from the group consisting of acetone, methylethyl ketone, ethylene glycol, ethylene glycol methyl ether, di-ethylene glycol methyl ether, propylene glycol, glycerol, di-propylene glycol, tri-propylene glycol, propylene glycol methyl ether and di-propylene glycol methyl ether;
- (7) from about 5% to about 40% by weight of a halogenated phenol and (8) from about 0.005% to about 5% by weight of a mercury compound selected from the group consisting of inorganic salts of mercury, organic salts of mercury and mercuric oxide.
A wood product comprising wood contacted with a ready-to-use solution of a stable liquid sapstain concentrate comprising (1) from about 0.001% to 40% by weight of an alkali metal cyanide selected from the group consisting of lithium cyanide, sodium cyanide and potassium cyanide;
- (2) from about 20% to about 90% by weight of water;
- (3) from about 0.05% to about 18% by weight of an alkali metal hydroxide selected from the group consisting of lithium hydroxide, sodium hydroxide and potassium hydroxide;
- (4) from about 1% to about 22% by weight of an alkali metal borate selected from the group consisting of lithium borate, sodium borate and potassium borate;
- (5) from about 3% to about 15% by weight of an alkanol having from 1 to 4 carbons;
- (6) from about 3% to about 20% by weight of an organic solvent selected from the group consisting of acetone, methylethyl ketone, ethylene glycol, ethylene glycol methyl ether, di-ethylene glycol methyl ether, propylene glycol, glycerol, di-propylene glycol, tri-propylene glycol, propylene glycol methyl ether and di-propylene glycol methyl ether;
- (7) from about 5% to about 40% by weight of a halogenated phenol and (8) from about 0.005% to about 5% by weight of a heavy metal salt or oxide selected from the group consisting of inorganic and organic salts of mercury, lead, tin, copper, zinc, cadmium, arsenic, antimony and silver, and oxides of mercury, lead, tin, copper, zinc, cadmium, arsenic, antimony and silver.
Dependencies are inferred from the claim text.