What it does

Cure retarder (antiscorch). Improves processing safety in sulfenamide systems; practically does not change cure rate or final properties.

Compatible rubbers

NRSBRBRNBREPDM

Typical properties

AppearancePOff-white to light tan powder
Melting pointP92.6 °C
DensityP1.33 g/cm³

P marked values are PubChem literature data (pure substance). Others are typical commercial specifications and vary by producer and grade.

Typical dosage

0.1–0.5 phr [TO BE VERIFIED]

FAQ

When is PVI used?It is used when the compound has a scorch risk: high-temperature processing, long storage or reprocessing. It is most effective in sulfenamide systems.
Does PVI bloom?At high dosage, white bloom can appear on the surface. For this reason it is used at the lowest effective dosage.
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Sources: PubChem CID 28777 · General rubber chemistry literature · PubChem page