Structure of Urethane
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Urethane

Urethane 1. A polymer containing a urethane linkage. 2. Any organic chemical compound contaning a urethane functional group (or linkage). 3. The specific compound (NH2*COOC2H5). This ethyl ester is a white crystalline substance 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. more...

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Generally, a urethane is an ester of a carbamic acid (RNHCOOQ, where R and Q represent many different organic compounds). Many can be created by an isocyanate reaction with a hydroxyl group of an alcohol (or other hydroxy containing compound) according to the following formula:

Although this reaction had been known for some decades, it was not until 1937 that Otto Bayer discovered how to make the very useful polyurethane plastics out of polyisocyanate and polyol (a molecule with multiple hydroxyl groups), (see Polyurethane). There are many other more specialized ways to make urethanes.

Urethane technology was brought to America in 1953 by Jean-Pierre Abbat and Dr. Fritz Hartmann.

Urethanes are used in pharmaceuticals, (bio)chemical analysis and plastics.

Urethane is also widely used in skateboard and in-line skate wheel production, effectively replacing the clay wheel used before that.

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Compressible Urethane Foam suits handheld electronic devices
From Product News Network, 5/19/05

Available in .039 in. thickness, PORON[R] 4790-92 Microcellular Extra Soft - Slow Rebound Foam is resistant to extreme temperatures, shock, and compression set. It is suited for filling gaps, providing seals, and protecting components from environmental hazards, as well as managing shock and vibration energy.

********************

**Softer, More Compressible PORON[R] Microcellular Urethanes**

Rogers, CT, May 12, 2005: Rogers Corporation (NYSE:ROG) announces an addition of Extra Soft - Slow Rebound Urethane foam to the 4790-92 PORON[R] Microcellular Urethanes family. This material is the lowest density offering in the 4790 product portfolio, meeting market demand for softer, more compressible material options. Available in 1mm thickness (.039"), the product is the most compressible PORON material available to date - ideal for compact, handheld, mobile electronic devices.

As handheld and electronic devices become more compact and technologically advanced, design engineers are requiring thinner, lighter, softer and more compressible materials to solve their gasketing and cushioning challenges. To meet a wide variety of design requirements, materials must be available in a variety of thicknesses and densities. They must also be resistant to extreme temperatures, shock, and compression set.

The availability of PORON Urethanes in various formulations, thicknesses, and densities makes them ideal solutions for filling gaps, providing seals, protecting components from environmental hazards, and managing shock and vibration energy.

A number of design guides are available for engineers for Handheld Electronics devices on Rogers' Web site: www.rogerscorporation.com in addition to marketing and technical support teams.

The information contained in this news release is intended to assist you in designing with Rogers 4790-92 PORON[R] Microcellular Urethanes family. This news release is not intended to and does not create any warranties, express or implied, including any warranty of merchantability or fitness for a particular purpose. The user is responsible for determining the suitability of these products for each application.

PORON[R] is a licensed trademark of Rogers Corporation. Rogers Corporation, headquartered in Rogers, CT, U.S.A., develops and manufactures high-performance specialty materials, which serve a diverse range of markets including: wireless communications, computers and networking, imaging, transportation and consumer.

Rogers operates manufacturing facilities in Connecticut, Arizona, Illinois in the U.S., in Gent, Belgium, in Suzhou, China, and in Hwasung City, Korea. Sales offices are located in Japan, Taiwan, Korea, China, and Singapore. High resolution electronic product image is available upon request. Rogers Corporation Web site: www.rogerscorporation.com

Product Information: litporonhc@rogerscorporation.com

Product Contact: Vinnie Jain, Market Development Manager, Rogers Corporation, 245 Woodstock Road, Woodstock, CT 06281, Phone: 860/928-8901, Fax: 860/928-7843, email: vinnie.jain@rogerscorporation.com.

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