Isophthalic Acid
Isophthalic acid is an organic compound with the formula C?H?(CO?H)?. This colorless solid is an isomer of phthalic acid and terephthalic acid.
Molar mass: 166.14 g/mol
Formula: C8H6O4
Density: 1.53 g/cm³
Solubility in water: Insoluble
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Isophthalic acid is an organic compound with the formula C?H?(CO?H)?. This colorless solid is an isomer of phthalic acid and terephthalic acid.
Molar mass: 166.14 g/mol
Formula: C8H6O4
Density: 1.53 g/cm³
Solubility in water: Insoluble
Isophthalic acid (PIA) has three major uses:
1)PET (PolyEthylene Terephthalate) copolymer, which is used in bottle resins and to a much lesser extent, for fibers. PIA (Purified Isophthalic Acid) reduces the crystallinity of PET, which serves to improve clarity and increase the productivity of bottle-making.
2)Unsaturated polyester resins, where the addition of PIA improves thermal resistance and mechanical performance, as well as resistance to chemicals and water.
3)Polyester/alkyd surface coating resins, where PIA increases resistance to water, overall durability and weatherability.