Tung Oil

Title: Tung Oil
Additional Names: China wood oil
Literature References: A drying oil from seeds of Aleurites cordata Steud., Euphorbiaceae, indigenous to China and Japan, but now grown also in Florida. Chief fatty acid component is eleostearic acid. Unlike linseed and soybean oils, it need not be refined.
Properties: Pale yellow liquid; characteristic disagreeable odor. On long keeping, or on heating for a short time at 300°, polymerizes to a stiff jelly. d 0.936-0.943. Iodine no. 163-171. Sapon no. 190-197. Sol in chloroform, ether, carbon disulfide, oils; the polymerized product is practically insol in the usual organic solvents.
Density: d 0.936-0.943
Use: Manuf quick-drying wood varnishes, linoleum, and floor cloth; in India rubber substitutes, insulating masses; for waterproofing paper and other tissues.
Tungsten Hexafluoride Tungsten Trioxide Tungstic(VI) Acid Tunicamycin Tunichrome B-1

Major fatty acid composition of tung oil[1]
Palmitic acid 5.5%
Oleic acid 4.0%
Linoleic acid 8.5%
alpha-Eleostearic acid 82.0%

Tung oil or China wood oil is a drying oil obtained by pressing the seed from the nut of the tung tree (Vernicia fordii). As a drying oil, tung oil hardens (dries) upon exposure to air. The resulting coating is transparent and plastic-like, a property exploited in most of its application which include wood finishing and the composition of oil paints and printing inks. Related drying oils include linseed, safflower, poppy, and soybean.[2] The oil and its use are believed to have originated in ancient China and appear in the writings of Confucius from about 400 B.C. Raw Tung oil tends to dry to a fine wrinkled finish; the US name for this is gas checking: this property is used to make crystal finishes. To stop this, the oil is heated to gas-proof it, and most oils used for coating are gas-proofed. This property was used to make wrinkle finishes, usually by adding excess cobalt drier.

The name is often used by paint and varnish manufacturers as a generic name for any wood finishing product that contains the real tung oil and/or provides a finish that resembles that obtained with it.[3]