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Abstract
Unsaturated polyester resins are widely used in the field of chemical process equipment [1-4] because of their handling properties. For example, large structures of complex shape can be fabricated with simple tools, frequently on the site. In general, unsaturated polyesters do not show an outstanding resistance to strong solutions of corrosive chemicals in contrast with other plastics. Nevertheless, as the chemistry of the unsaturated polyesters developed, special resins were made with excellent resistance to chemicals while maintaining important handling properties.
