urethane

Definitions

  • WordNet 3.6
    • n urethane an ester of carbamic acid
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Webster's Revised Unabridged Dictionary
    • Urethane (Org. Chem) A white crystalline substance, NH2.CO.OC2H5, produced by the action of ammonia on ethyl carbonate or by heating urea nitrate and ethyl alcohol. It is used as a hypnotic, antipyretic, and antispasmodic. Hence, any ester of carbamic acid.
    • Urethane same as polyurethane.
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Century Dictionary and Cyclopedia
    • n urethane In chem., any ester of carbamic acid.
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Etymology

Webster's Revised Unabridged Dictionary
F. uréthane,. See Urea; Ether

Usage

In literature:

When heated with ammonia it yields urethane.
"Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 3" by Various
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In news:

Cytec Industries Inc has introduced a newly developed urethane acrylate for consumer electronics.
But what's the difference between urethanes and acrylics .
New facility to produce urethanes.
How Durable Is Water-Based Urethane.
PRODUCTS & TECHNOLOGY: Thick-Film, Moisture-Cure Urethane Polymer.
Urethane Tooling for Mark-free Bending.
New urethane products from Wilson Tool Intl.
Products available include urethane dies for American Precision and European styles.
PRODUCTS & TECHNOLOGY: Urethane Concrete Sealer.
Anvil Paints & Coatings introduced the 1800 Two-Part Water Based Clear Urethane Concrete Sealer, a high-solids product with reduced VOC content and low odor.
Urethane tooling for radius bending on press brakes.
Sherwin-Williams has introduced FasTop 12S, a three-component water-based urethane concrete designed to provide flooring contractors with more working time.
A Connecticut urethane coatings maker is facing federal citations and $74,000 in fines after a fire in August left four workers hospitalized.
Sherwin-Williams Aerospace Introduces New Urethane Primer and Sanding Surfacer.
Jet Glo Express from Sherwin-Williams Aerospace is a high-solids, multi-component polyester urethane system designed for use on high-performance general aviation and commercial aircraft.
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In science:

The theory of gelation is tested by the recent experiments in poly(urethane) network.
Theory of Gel Formation: Test of the Gel Theory by Ilavsky Experiments
To test the theory, let us take up the recent observation by Ilavsky and coworkers : the polyaddition reaction of tris(4-isocyanatophenyl)thiophosphate (TI) and poly(oxypropylene)diol (PD) to yield a poly(urethane) network.
Theory of Gel Formation: Test of the Gel Theory by Ilavsky Experiments
C−O bond length (1.36 ˚A) of the urethane moiety for the present case.
Theory of Gel Formation: Test of the Gel Theory by Ilavsky Experiments
Following the final motor activity session on the seventh day post-ischemia, the animals were anesthetized with urethane and perfused transcardially with cold saline followed by 4% paraformaldehyde in phosphate-buffered saline (pH 7.4).
The highly selective cyclooxygenase-2 inhibitor DFU is neuroprotective when given several hours after transient cerebral ischemia in gerbils
Then it is readily found through the numerical simulation that when we apply CF = 4.5, close to the value employed to the poly(urethane) homologue, a good result is obtained.
Theory of Gel Formation
It has been known earlier that isocyanates (−NCO) can react with alcohols (−OH) to form urethane bonds (−NHCOO−).
Theory of Gel Formation
Hence, in the system cited above , the poly(urea) formation must always be accompanied by the urethane bond formation that wastes FU’s because of the use of isopropyl alcohol as the reaction solvent.
Theory of Gel Formation
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