Tung Oil


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Related to Tung Oil: linseed oil

tung oil

[′təŋ ‚ȯil]
(materials)
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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

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.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

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.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
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