Assertion: polyester resin | /r/CapableOf | provide isophthalic acid
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Source sentences:
text: Unsaturated polyester resins are an extremely versatile, and fairly inexpensive class of thermosetting polymer formed by the polycondensation of glycol mixtures containing propylene glycol, with a dibasic acid and anhydrides usually maleic anhydride to provide backbone unsaturation needed for crosslinking, and orthophthalic anhydride, isophthalic acid or terephthalic acid where superior structural and corrosion resistance properties are required.