Thermo-stable aromatic polyesters

Highly durable, chemically inert, thermo-stable aromatic polyesters can be produced by interaction of polymers containing links of -oxyben-zoic acid, aromatic dioxy-compounds, for example of hydroquinone and aromatic dicarboxylic acids [40]. Thermo and chemically resistant polyesters of improved mechanical strength can be obtained by the reaction of n-oxybenzoic acid, aromatic dicarboxylic acids, aromatic dioxy-compounds and diaryl carbonates held in solid phase or in high-boiling solvents [41] at temperature 180 °C and lowered pressure, possibly in the presence of catalysts [42], Some characteristics of aromatic polyesters based on n-oxybenzoic acid are gathered in Table 7.1 [20],... 

Aromatic polyesters (AP) are thermo-stable polymers they are thermoplastic products useful for leproeessing into the articles and materials by means of formation methods from solutions and melts. 

From the available studies it would appear that hindered phenols in combination with phosphites, provided both components are sufficiently non-volatile and thermally stable, would be the preferred option for the thermo-oxidative stabilisation of aromatic polyesters. 

---