Diol-HCA HQEE is a premium diol chain extender developed for methylene diphenyl diisocyanate (MDI)-based polyurethane elastomer systems. Chain extenders play a critical role in determining the final properties of polyurethane materials, including hardness, tensile strength, abrasion resistance, and thermal stability. HQEE is widely recognized as a high-performance extender capable of delivering superior mechanical and dynamic properties compared to conventional glycols.
When used in MDI systems, HQEE contributes to a well-defined hard segment structure, resulting in improved phase separation and enhanced performance of the polyurethane elastomer. This makes it particularly suitable for high-load, high-wear, and high-temperature applications.
Chemical Name: HQEE (Hydroquinone bis(2-hydroxyethyl) ether)
CAS No.: 104-38-1
Chemical Type: Aromatic diol chain extender
Appearance: Typically solid or flakes (depending on grade)
Excellent mechanical strength and toughness
High heat resistance and thermal stability
Superior abrasion resistance and wear performance
Enhances hardness and load-bearing capacity
Improves dynamic properties and resilience
Ideal for high-performance MDI-based PU elastomers
Diol-HCA HQEE is widely used in demanding industrial applications:
Oil well seals
Heavy-duty forklift tires
Hydraulic and pneumatic cylinder seals
Polyurethane conveyor belts
Rollers, wheels, and industrial elastomer components
As a diol chain extender, HQEE reacts with isocyanate groups (–NCO) in MDI to form hard segments within the polyurethane structure. The aromatic nature of HQEE enhances intermolecular interactions and phase separation between soft and hard segments, leading to improved mechanical strength, thermal resistance, and abrasion performance.
Typically used in stoichiometric balance with isocyanate groups in PU formulation
Suitable for casting, reaction injection molding (RIM), and elastomer processing
Processing temperature and curing conditions should be optimized based on system design
Store in a dry, cool place away from moisture. Keep container tightly sealed. Preheating may be required before use depending on physical form. Follow standard safety procedures during handling.
