Arsenical creosote wood preservatives

Claim 2

A stable, homogeneous, aqueous solution for application to wood surfaces, said stable, aqueous solution consisting essentially of: (A) creosote; (B) a preservative component which is selected from the group consisting of (i) a normally water-insoluble salt selected from the group consisting of zinc arsenate, zinc arsenite, copper arsenate and copper arsenite and mixtures thereof; (ii) an ammonia-soluble salt selected from the group consisting of copper borate, zinc borate, and mixtures thereof, and copper chromate, zinc chromate, and mixtures thereof; (iii) an ammonia-dispersible organometallic compound selected from the group consisting of copper naphthenate, zinc naphthenate and mixtures thereof, copper-8-quinolinolate, zinc-8-quinolinolate and mixtures thereof, and tributyltin oxide; and, with either (i), (ii) or (iii) (iv) sufficient aqueous ammonia, in a concentration of about 1 to about 28% by weight NH 3 to solubilize said salt (i) or to dissolve said salt (ii) or to disperse said compound (iii); and (C) solvent for said compounds (A) and (B), said solvent being selected from the group consisting of fuel oil, pole treating oil, kerosene, tie-treating oil, waste crank oil, and a petroleum distillate; said solvent (C) being present in a sufficient amount, of about 13% to 80% by volume of the total aqueous solution, and said creosote (A) being present in an amount of from 7% to about 70% by volume of the total aqueous solution, thereby to provide said stable, homogeneous aqueous solution; said aqueous solution being capable of providing a creosote-treated wood surface which may be painted.

Claim 3

The stable homogeneous aqueous solution of claim 1, wherein said preservative component (B) comprises: (A) (i) a normally water-insoluble salt selected from the group consisting of zinc arsenate, zinc arsenite, copper arsenate, copper arsenite, and mixtures thereof; and (ii) sufficient aqueous ammonia, in a concentration of 1 to 28% by weight NH 3 to solubilize said salt (i).

Claim 4

The stable homogeneous aqueous solution of claim 1, wherein said preservative component (B) comprises: (B) (ii) an ammonia-soluble salt selected from the group consisting of copper borate, zinc borate, and mixtures thereof, and copper chromate, zinc chromate and mixtures thereof; and (iv) sufficient aqueous ammonia, in a concentration of about 1 to about 28% by weight NH 3 to solubilize said salt.

Claim 5

The stable homogeneous aqueous solution of claim 1, wherein said preservative component (B) comprises: (B) (iii) an ammonia-dispersible organometallic compound selected from the group consisting of copper naphthenate, zinc naphthenate and mixtures thereof, copper-8-quinolinolate, zinc-8-quinolinolate and mixtures thereof, and tributyltin oxide; and (iv) sufficient aqueous ammonia, in a concentration of about 1 to about 28% by weight NH 3 to disperse said compound (iii).

Claim 6

The stable homogeneous aqueous solution of claim 1, wherein said preservative component (B) comprises: (a) a normally water-insoluble compound selected from the group consisting of zinc arsenate, zinc arsenite, copper arsenate, and copper arsenite and mixtures thereof in an amount of about 0.1 to about 4% by weight (as Zn or Cu metal) of the total aqueous solution; (b) about 0.15 to about 10% by weight of the total aqueous solution of a water-repellent component selected from the group consisting of: (i) a water-insoluble organic acidic compound having a solubility about 0.2% in concentrated aqueous ammonia, said water-insoluble organic acidic compound being selected from the group consisting of a substantially water-insoluble saturated or unsaturated monocarboxylic acid having between 8 and 15 carbon atoms in the carboxylic acid; a substantially water-insoluble saturated or unsaturated monocarboxylic acid having between 8 and 15 carbon atoms in the carboxylic acid substituted with a hydrocarbon radical; a substantially water-insoluble saturated or unsaturated monocarboxylic acid having between 8 and 15 carbon atoms in the carboxylic acid substituted with a hydroxyl radical; a substantially water-insoluble saturated or unsaturated monocarboxylic acid having between 8 and 15 carbon atoms in the carboxylic acid substituted with a halogen; maleinized unsaturated fatty acids from animal or vegetable sources, and having an acid value of about 200 to about 500; maleinized unsaturated fatty esters from animal or vegetable sources and having an acid value of about 200 to about 500; maleinized unsaturated fatty acids, formed by the reaction of maleic acid with fatty polycarboxylic acids and having an acid value between 200 and about 500; maleinized unsaturated fatty acids formed by the reaction of maleic alkyds with fatty polycarboxylic acids, and having an acid value between about 200 and about 500; maleinized unsaturated fatty acid resins formed by the reaction of maleic acid with fatty polycarboxylic acids, and having an acid value between about 200 and about 500; maleinized unsaturated fatty acid resins formed by the reaction of maleic alkyds with fatty polycarboxylic acids, and having an acid value between about 200 and about 500; aromatic carboxylic acids having an acid value between 200 and about 500; acid esters of phosphoric acid with monohydric alcohols and having an acid value between about 200 and about 500; acid esters of phosphoric acid with fatty alcohols and having an acid value between about 200 and about 500; and synthetic polycarboxylic acids having an acid value between about 200% of the zinc or copper; (ii) a carbonate or bicarbonate ion selected from the group consisting of zinc carbonate, zinc bicarbonate, copper carbonate, and copper bicarbonate, in an amount of up to about 150% of the zinc or copper; and (iii) a combination of said selected organic acidic compound and a carbonate or bicarbonate ion selected from the group consisting of zinc carbonate, zinc bicarbonate, copper carbonate and copper bicarbonate in an amount of up to about 150% of the zinc or copper; and (c) ammonia, in an amount of about 1 to about 28% by weight of the total aqueous solution; the ammonia being sufficient to solubilize said normally water-insoluble salt of zinc or copper and said normally water-insoluble water-repellent compound.

Claim 7

The stable homogeneous aqueous solution of claim 1, wherein said preservative component (B) is selected from the group consisting of: (a) zinc arsenate, nonanoic acid zinc carbonate, and an aqueous ammonia solution (about 10% by weight); (b) zinc arsenate zinc carbonate monododecyl phosphate and an aqueous ammonia solution (about 7% by weight); (c) zinc arsenate decanoic acid, zinc carbonate, and an aqueous ammonia solution (about 10% by weight); (d) zinc arsenate zinc oxide ammonium carbonate dibutyl phosphate, and an aqueous ammonia solution (about 10% by weight); (e) zinc metaarsenite, zinc carbonate, decanoic acid, and an aqueous ammonia solution (about 5% by weight); (f) copper carbonate, copper arsenate, lauric acid, and an aqueous ammonia solution (about 5% by weight); (g) copper arsenate, decanoic acid, and an aqueous ammonia solution (about 7% by weight) (h) copper carbonate copper arsenite, dihexyl phosphate, and an aqueous ammonia solution (about 7% by weight); (i) copper carbonate, copper arsenate decanoic acid, and an aqueous ammonia solution (about 7% by weight); and (j) copper arsenate, copper carbonate, decanoic acid, and an aqueous ammonia solution (about 5% by weight).

Claim 8

The stable homogeneous aqueous solution of claim 1, wherein said preservative component (B) is selected from the group consisting of: (a) soluble component adapted to form a normally water-insoluble compound of zinc or zinc and copper with arsenic acid or arsenious acid in an amount of about 0.1--about 4% by weight (as Zn or Zn+Cu metal) of the total aqueous solution, the weight ratio of zinc or zinc and copper (as oxides) to arsenic (as oxides) being about 1.5 or more; (b) about 0.15--about 10% by weight of the total aqueous solution of a water repellent component comprising at least one of carbonate and bicarbonate ions, in an amount of up to about 150% of the zinc or copper; and (c) ammonia, in an amount of about 1--about 28% by weight of the total aqueous solution.

Claim 9

A method for protecting wood which comprises: applying to the surfaces thereof the stable homogeneous aqueous solution as claimed in claim 1, causing impregnation of said wood; and then drying such wood with the resulting loss of ammonia; thereby providing a creosote treated wood surface which may be painted.

Claim 10

The method of claim 8 including the step of painting the creosote-treated wood surface.

Claim 11

Creosote-treated wood which has been treated according to the method of claim 8.

Claim 12

Painted, creosote-treated wood which has been treated and painted according to the method of claim 9.