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With Durene as the raw material, ≥98% crude pyromellitic anhydride can be obtained directly by catalytic air oxidation and it is now widely used as powder coating additives, i.e. curing agent, leveling agent and matting agent.
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Pyromellitic dianhydride is white or yellow block and pink solid crystal with a specific gravity of 1.68, and it is soluble in acetone, dimethyl acetamide and other solvents.
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Pyromellitic acid is a white powder crystal with a specific gravity of 1.6, and it is soluble in alcohol, slightly soluble in ether and water. Pyromellitic acid is a chemical intermediate used in the synthesis of polyimide, octyl terephthalate, etc. It is the main raw material for the production of matting curing agent.
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