Dimethyl isophthalate

Dimethyl isophthalate (CAS 1459-93-4), commonly abbreviated as DMIP, is a diester monomer used as a reactive building block in the synthesis of high-performance polyesters, polyurethanes, and specialty resins.

Where is Dimethyl isophthalate used?

• Coatings and powder coatings: incorporated into polyester resin synthesis to balance hardness and flexibility in the final film
• Adhesives and sealants: co-monomer to tune mechanical properties of polyester-based systems, particularly elongation and adhesion
• Engineering plastics and fiber production: modifies crystallinity
• It also functions as a plasticizer intermediate in specialty elastomer compounding.

Good to know: It introduces meta-oriented ester linkages into polymer backbones, improving flexibility, thermal stability, and compatibility. It alters processing behavior in copolyester systems, offering an alternative to terephthalate-based monomers where amorphous or lower-melting profiles are required.

Commercial specifications

• Purity levels typically at 99% or higher
• Packaging in bags and drums suited to bulk polymer and resin manufacturing