Poluurethane

A detailed Summary of Poluurethane

Polyurethanes are very versatile thermoset plastics that were originally developed for military use by Otto Bayer in the late 1930's. They are so versatile that they can be made into a compound as soft as bubble-gum, or they can also be formed into compounds that are as hard as a soft metal. This is why they are so common in our everyday life's. Today a wide variety of polyurethanes are used for many different applications, such as; flexible polyurethanes are used to make sofas, cushions, carpet backs, car seats. Rigid foams are used for insulation in freezers, refrigerators, and roofs. Many shoe companies also use tough elastomeric polyurethanes for shoe soles. The auto industry also use polyurethanes for a variety of reasons, including dashboards, bumper covers, moldings and fenders. And these are just a few of the many use for polyurethanes.

The base material used to form polyurethane compounds is actually a by-product of the oil refining process. The end product, polyurethane, is made with two basic ingredients: a Isocyanate and Polyol. This is shown in the reaction below:

R - NCO + R' - OH = R - N - C - O - R'

Abrasion Resistant ~ When severe abrasion is a factor, parts made out of polyurethane will outwear other materials by up to a ratio of 50:1. It's been proven to be vastly superior to rubber plastics and metal in many applications.

http://www.corrosion.com:80/madison/polyurethane.html

Electrical Properties ~ Polyurethane has excellent electrical insulating properties and is successfully used in many molded wire and cable harness assemblies.

Weather Resistant ~ Polyurethane has outstanding resistance to oxygen, ozone, sunlight, and general weather conditions.

Some common words found in the essay are:
Electrical Properties, R' Polyurethanes, Otto Bayer, Abrasion Resistant, HCFC HCFC's, Tear Resistant, Bearing Capacity, Weather Resistant, Polyurethane Polyurethanes, Thermoplastic Polyurethanes, ~ polyurethane, resistant ~, bonded carpet underlay, carpet underlay, polyurethane foam, foam scraps, ether glycol, bonded carpet, processed scrap, isocyanate polyol, negative effects,

Approximate Word count = 939
Approximate Pages = 4 (250 words per page double spaced)

Category: Science

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