Applied processes and techniques in the production of unsaturated polyesters

2 Applied processes and techniques in the production of unsaturated polyesters 

As there are a huge number of different products summarised under the name of unsaturated polyesters which are produced with a variety of different raw materials, an overview of the most important raw materials in UP production is given in Table 6.3. 

Maleic anhydride melted/solid anhydride/diacid 108-31-6 

The most commonly used unsaturated dicarboxylic acids are maleic anhydride and fumaric acid. The most commonly used saturated carboxylic acids are phthalic anhydride, orthophthalic acid, isophthalic acid and terephthalic acid. Commonly used types of diols are ethylene glycol, diethylene glycol, propylene glycol, butanediol, hexanediol, dipropylene glycol and neopentyl glycol. 

Dicyclopentadiene is another important monomer used for unsaturated polyesters. 

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