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Isophthalic Polyester
These resins can be used for moderate corrosion resistance applications up to 180°F. At moderate temperatures, they exhibit good resistance to water, acids, weak bases and petroleum solvents such as gasoline and oil. They can also meet Class I and II flame spread requirements. Some examples of an Isophthalic Polyester resin are Hetron 99P and Dion 6631T.
Bisphenol A Fumarate Polyester
These resins are particularly resistant to alkaline environments. They also can handle acids, select organic solvents and salt environments to a maximum temperature of 250°F. They can also meet Class I and II flame spread requirements. Some examples of a Bisphenol A Fumarate Polyester resin are Hetron 700 and Dion 6694.
Chlorendic Polyester
These resins are particularly well suited for equipment operating at elevated temperatures or in highly oxidizing environments including hot, wet chlorine. They can also meet Class I and II flame spread requirements. An example of a Chlorendic Polyester resin is Hetron 197.
Vinyl Ester
These resins exhibit excellent resistance to acids, alkalis, hypochlorites and many organic solvents. They offer excellent physical strength and, in general, much better impact and thermal shock resistance than rigid polyester resins. While the standard Vinyl Ester resins are limited to 220-250F in most applications, other versions are suitable for temperatures above 250F. They can also meet Class I and II flame spread requirements. Some examples of a Vinyl Ester resin are Hetron 922, Dion 9100NP and Derakane 470. See discussion on why "Vinyl Ester Resins are NOT Cure-All in Corrosion Service".
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