wax

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wax,

substance secreted by glands on the abdomen of the bee and known commonly as beeswax; also various substances resembling beeswax. Waxes are mixtures comprising chiefly esters of monohydroxy alcohols, besides other esters and free fatty acids, free alcohols, and higher hydrocarbons. They differ from fats in that fats contain chiefly esters of glycerol. Waxes are generally harder and less greasy than fats, but like fats they are less dense than water and are soluble in alcohol and ether but not in water. Among the waxes derived from plants are carnauba wax, obtained from the leaves of a palmpalm,
common name for members of the Palmae, a large family of chiefly tropical trees, shrubs, and vines. Most species are treelike, characterized by a crown of compound leaves, called fronds, terminating a tall, woody, unbranched stem.
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 grown in Brazil, and candelilla wax, produced by a Mexican plant (Euphorbia antisyphilitica). Those of animal origin include wool wax, or lanolin, obtained from the surface of wool fibers and used in making certain creams, ointments, and soaps, in the processes of finishing and softening leather, and as an ingredient of some paints and varnishes; spermacetispermaceti
, solid waxy substance, white, odorless, and tasteless, separated from the oils obtained from the sperm whale (see sperm oil) and other marine mammals. A mixture of esters of fatty acids, it is composed chiefly of cetyl palmitate.
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, obtained from the sperm whale, and Chinese wax, which is deposited on certain trees in parts of Asia (especially China and India) by a species of scale insect. Mineral waxes include ozocerite and paraffinparaffin,
white, more-or-less translucent, odorless, tasteless, waxy solid. It melts between 47°C; and 65°C; and is insoluble in water but soluble in ether, benzene, and certain esters. Paraffin is unaffected by most common chemical reagents but burns readily in air.
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, both composed of hydrocarbons. Japan wax and bayberry (or myrtle) wax are composed chiefly of fats.

Bibliography

See L. Roth and J. Weiner, Waxes, Waxing and Wax Modifiers (1961); H. Bennett, Industrial Waxes (2 vol., 1963); P. E. Kolattukudy, ed., Chemistry and Biochemistry of Natural Waxes (1976).

wax

[waks]
(materials)
Any of a group of substances resembling beeswax in appearance and character, and in general distinguished by their composition of esters and higher alcohols, and by their freedom from fatty acids.

wax

A thermoplastic solid material obtained from vegetable, mineral, and animal matter; soluble in organic solvents; used in paste or liquid form as a protective coating or polish on wood and metal surfaces and as an additive in paints.

wax

1. any of various viscous or solid materials of natural origin: characteristically lustrous, insoluble in water, and having a low softening temperature, they consist largely of esters of fatty acids
2. any of various similar substances, such as paraffin wax or ozocerite, that have a mineral origin and consist largely of hydrocarbons
3. short for beeswax, sealing wax
4. Physiol another name for cerumen
5. a resinous preparation used by shoemakers to rub on thread
6. bone wax a mixture of wax, oil, and carbolic acid applied to the cut surface of a bone to prevent bleeding
References in periodicals archive ?
Other advantages to this technique include easy retrieval of the model from the three layers of impression surface, easy retrieval of the wax pattern prepared from the impression surface of the donor technique, and less voids while recording the impression of the internal surface of the external ear.
5) we conclude that to achieve a good dimensional accuracy and low contraction of the wax pattern, it is recommended a casting temperature as close to the melting point temperature and also a mould preheating temperature as low.
However, the difficulty in this approach is that it's impossible to control the exact way in which the beads are distributed over the wax pattern, so every casting is slightly different.
After extensive research and testing with the 3-D Printer, Sirona has announced plans to use 3D Systems' InVision([R]) DP 3-D Modeler to fabricate inCoris WAX patterns as part of Sirona's infiniDent service beginning in March 2008.
Compared techniques are milling of Zirconia, selective laser sintering (SLS) of a dental CrCo-alloy, and investment casting of CrCo-alloy from Drop-on-Demand (DoD) wax patterns.
This means virtually no manual handling prior to deplate, once wax pattern assemblies enter the system.
The illustrated dewaxing system was designed to solve a problem of cracking of product molds during the wax pattern removal process while using a conventional dewaxing autoclave.
DESI/AIR will provide efficient and economical desiccant dehumidification to speed up the necessary drying steps without damaging the wax pattern which is a serious risk when heat is used.
It opted to completely automate its wax pattern area to reduce man hours needed and speed up the process.
PROBLEMS--Wisconsin Precision Castings wanted to understand the correlation between the operating parameters of their MPI Wax Pattern Injector and the result of scrap.