Scorch Retarder CTP/PVI for Complex Extrusion & Thick-Section Molding: Safety & Processing Window

How N-cyclohexylphthalimide (CTP/PVI) extends scorch safety for complex profiles and thick rubber goods without sacrificing final properties.

Where Scorch Bites

Complex extrusions run hot and thick-section moldings trap heat, both risking premature cure (scorch) before the part is formed.

What CTP/PVI Does

CTP-50 masterbatch delays the onset of cure (longer induction / scorch time) while the final crosslink density and physical properties stay intact when dosed correctly.

Dosage Guideline

0.2–0.5 phr, adjusted to compound, temperature and residence time. Add at the final mixing stage to avoid premature activation.

Watch Points

Too high a dose can over-delay cure and reduce throughput. Always check MDR scorch time (ts1/ts2) before production.

TDS / Technical Data Sheet

SDS Highlights

Low toxicity. Avoid inhalation of dust and contact with eyes. Use gloves and dust mask; keep away from strong oxidizers. Dispose of as chemical waste per local rules.

COA Sample

Product Information