Agent CTP (PVI)
Chemical name: N-(cyclhexyl thio) phthalimide
Molecular Formula: C14H15O2NS
Chemical Structure:
CAS NO.: 17796-82-6
Specification:
| Item | Granulate | Oil powder |
| Appearance | White or Light yellow granules | White or Light yellow oil powder |
| Melting point [°C] | 90,0-94,0 | 89,0-94,0 |
| Purity [min. %] | 95,0 | 97,0 |
| Ash Content [min. %] | 0,10 | 0,10 |
| Insolubles [min. %] | 0,50 | 050 |
| Weight loss [min. %] | 0,30 | 0,30 |
| Sulphur Content [%] | 11,5-12,5 | – |
| Oil content [%] | – | 1,5 |
What is PVI?
PVI (N-(Cyclohexylthio)phthalimide), also known as rubber vulcanization inhibitor, is a highly effective scorch retarder used in the rubber industry. It is designed to delay premature vulcanization (scorching) during rubber processing, especially at elevated temperatures.
PVI improves processing safety, provides better control of vulcanization, and ensures stable physical properties of rubber compounds, making it an essential additive in modern rubber formulations.
Properties:
This product appears as light yellow to yellow crystalline powder. Its specific gravity is approximately 1.33. It is slightly soluble in organic solvents such as benzene and acetone, and insoluble in water. PVI has low volatility, good thermal stability, and low toxicity. It should be handled carefully and stored away from heat and strong oxidizing agents.
Application:
It is widely used in natural rubber (NR) and synthetic rubbers such as SBR, BR, NBR, and EPDM. PVI is commonly applied in tires, rubber hoses, belts, seals, and molded rubber products, where improved scorch safety and processing stability are required.
Packing:
In 25kgs bag.
Storage:
Store in a cool, dry, and well-ventilated place, in tightly sealed packaging, away from heat, moisture, and strong oxidizing agents. The storage life is typically 1 year when stored in its original, unopened packaging.