Ethylene glycol-MDI copolymer

Ethylene glycol-MDI copolymer (CAS 25036-33-3) is a urethane-based polymer formed from the reaction of ethylene glycol with methylene diphenyl diisocyanate. Also referenced commercially as Polyurethane y-304 and Polyurethane-39.

Where is Ethylene glycol-MDI copolymer used?

• Coatings and adhesives: crosslink density and substrate bonding
• Automotive OEM and refinish: structural adhesives and underbody sealants with dimensional stability under thermal cycling
• Rubber compounding and tire manufacturing: processing aid that modifies rheological behavior
• Rigid and semi-rigid plastics: network formation determining hardness and load-bearing characteristics
• It functions as a structural resin and crosslinking matrix in polymer systems requiring controlled rigidity, adhesion, and network density.

Commercial specifications

• Packaging in bulk quantities for industrial compounding and formulation