Revonox^® 501 is a benzo-furanone antioxidant which optimally combines carbon-centered radical scavenger activity and primary antioxidant functions in a single molecule. As a multi-functional antioxidant, Revonox^® 501 can be applied as a highly efficient thermal processing stabilizer to provide outstanding performance in a variety of polymers such as PP, PE, PBT, styrenics, olefin-copolymers, and adhesives.

Revonox^® 501 shows a significant synergistic effect when formulated with hindered phenolic antioxidants. Its superior radical scavenging activity over conventional antioxidant systems is particularly pronounced when tested in anti-scorching experiment.

In the simulated dry spinning process of spandex (PU elastic fibers), an antioxidant system combined with Revonox^® 501 demonstrates better radical scavenging efficiency with a lower total dosage, achieving effective yellowing control, as shown in the figure above.