tung oil

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tung oil,

oil obtained from the seeds of a tropical tree, the tung tree (Aleurites fordii) of the spurgespurge
, common name for members of the Euphorbiaceae, a family of herbs, shrubs, and trees of greatly varied structure and almost cosmopolitan distribution, although most species are tropical. In the United States the family is most common in the Southeast.
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 family, and from seeds of some related species, all from Indomalesia or W Pacifica. It is known also as China wood oil and nut oil. The poisonous seeds found in the heart of the tung fruit (which is the size of a small apple) contain more than 50% tung oil, readily obtained when the seeds are heated, ground, and pressed. The oil is amber-colored and contains a high proportion of eleostearic acid. Because of its wide use as a dryer in varnishes and paints, it has great commercial importance. While the bulk of the product is utilized by the paint and varnish industry, tung oil has additional uses, e.g., as a component of insulating compounds and in the manufacture of linoleum and oilcloth. China was long the chief producer of the oil, but the tree has been introduced in other areas as well. The U.S. Dept. of Agriculture experimented with tung tree growing early in the 20th cent., and afterward encouraged Southern farmers to cultivate it. In recent years, an increasing portion of the commercial supply has been obtained from trees grown in the United States, particularly in the South.

Tung Oil


(also wood oil or China wood oil), a fatty vegetable oil obtained from the seeds of the tung tree (Aleurites cordata). Tung oil constitutes as much as 70 percent of the weight of the seeds. A viscous and pungent yellowish fluid, tung oil dries rapidly in air and is soluble in most organic solvents. It has a density of 0.933–0.945 g/cu cm and a refractive index of 1.51–1.52. The saponification number is 188–197, and the iodine number is 154–176. Tung oil is composed of unsaturated acids (66–82 percent eleostearic acid, 4–13 percent oleic acid, and 9–11 percent linolenic acid), saturated acids (about 2.5 percent stearic acid and 3.7 percent palmitic acid), and unsaponifiable substances (0.4–1 percent). Such large quantities of eleostearic acid are found only in tung oil. The principal use of the oil is in the manufacture of paints and varnishes. Tung oil is mildly toxic.

tung oil

[′təŋ ‚ȯil]
A yellow, combustible drying oil extracted from the seed of the tung tree; soluble in ether, chloroform, carbon disulfide, and oils; used in formulations for paints, varnishes, varnish driers, paper waterproofing, and linoleum. Also known as China wood oil.

tung oil

A drying oil which oxidizes very rapidly, at almost twice the rate of linseed oil; forms a hard dry film when used in paints and varnishes; although “China wood oil” and “wood oil” sometimes are used as synonyms, tung oil never is extracted from wood.
References in periodicals archive ?
Shang, Jiang, Lu, and Liangm (2010) showed that the composition of the Tung oil could vary in accordance with its origin.
In order to understand the causes of different fatty acid compositions of Jatropha oil and Tung oil at gene level, and improving their fuel characteristics, we used transcriptome sequencing strategy in seeds of Jatropha and Vernicia.
This work successfully demonstrated that soybean oil can be used to achieve the necessary coating performance, instead of using the more expensive and scarcely available tung oil.
Indeed, the Poplarville laboratory had originally been known as the "USDA Tung Oil Research Station"--a reflection of its commitment to providing commercial tung tree growers in Mississippi, Florida, Louisiana, and other Gulf Coast states with new varieties that offered high yield, frost tolerance, and other desirable traits.
Don't confuse TOO percent Tung oil with the Tung oil finishes widely available at home centers and hardware stores.
For manufacturers of vehicles and varnishes, there are a number of key raw materials that are critical to production, such as rosin and Chinese tung oil.
The hydroxylated tung oil (HTO), dry TEOA, and lithium hydroxide (catalyst) were added together in a reactor with mechanical stirrer.
Three chemical impregnation processes were studied: phenol-formaldehyde (PF), tung oil (TO), and acetylation with acetic anhydride (AA).
Finally, he devised the tung oil treatment, which can be maintained with furniture polish.
The major constituent of tung oil is eleostearic acid, oleic acid, and linoleic acid.
Depending on which desaturases are activated, and the growth conditions scientists create, the yeast's metabolism converts the lipids into valuable byproducts, such as alpha eleostearic acid, which is a main tung oil component, and alpha linolenic acid.
Sand the top and rub on a finishing oil that contains Tung oil.