orings-logo contact
requestquotes custommolded
ticketsystem
onlinestore

redbutton PRODUCTS

  . Line Card
 
. O-Ring AS568
 
. O-Ring Kits
 
. Caps
 
. Cords
 
. Custom Parts
 
. Grommets
 
. Hydraulic Seals
 
. Plugs
 
. Rubber Balls
 
. Rubber Sheets
 
. Rubber Stoppers
 
. U-Cups

redbutton ENGINEERING

 . ASTM
 . Compatibility
 . Gland Design
 . Hardness
 . Materials
 . Permeation
 . Shelf Life
 . Temperature
 . Tensile Strength
 . Test Data
 . Tolerances
 

redbutton INDUSTRIES

 . Aerospace
 . Automotive
 . Biomedical
 . Electronics
 . Fire Suppression
 . Fluid Power
 . Food / FDA / NSF
 . Military / Defense
 . Oil / Chemical
 . Semiconductor
 

redbutton CONTACT US

 . How to contact us
 . Ask Us Anything!

 


bar-v
Urethane
bar

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.

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:

  •           H
              /
             R-N
    R-N=C=O + H-O-Q → \
            C=O
            /
          Q-O

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

 

agencies

All materials contained in this website is copyrighted. Copyright 2012 O-Rings, Inc. All rights reserved.  ® Each respective company owns respective trade marks.  By visiting our site, you are accepting our terms of use and legal restrictions