Polyurethane Chemistry

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Polyurethane and Composition

Polyurethanes are among the most important class of specialty polymers. But, ironically, the term polyurethane leads to a great deal of confusion. The term is more of convenience than of accuracy because polyurethanes are not derived from polymerizing a methane monomer, nor are they polymers containing …….. For learnings Contact Us

Overview of Polyurethane Markets

The worldwide demand for polyurethanes is estimated to approach 17 billion pounds in 2010, or about 5% of total world consumption of plastics. Polyurethanes, although consid¬ered to be a specialty, are behind only such large-volume commodity …….. For learnings Contact Us

Mechanisms

All polymers can be depolymerized; polyurethanes are no exception. Polyurethanes can be depolymerized chemically in eight ways. Hydrolysis is defined as a chemical reaction in which water reacts with another molecule to form two or more substances. Thermolysis reactions are those that occur due to heat. Oxidation is a reaction in which oxygen combines …………. For learnings Contact Us

HCFC as a Sole Blowing Agent

In the production of polyurethane foams, a polyol is reacted with a polyisocyanate in the presence of a polyurethane catalyst and a blowing agent. Unfortunately, certain blowing agents, namely chlorofluorocarbons (the so-called CFCs) are hazardous to the environ¬ment, specifically the ozone layer of the atmosphere. Hence…….. For learnings Contact Us