Rubber Chemical PVI ,also called PVI or CTP also known as N-(Cyclohexylthio) phthalimide used as ant scorching agent, is an flame retardant for NR and synthetic diene rubbers. PVI is a pre-vulcanization inhibitor which enables processing safety to be controlled in a predictable manner in sulphur curable compounds. Applicationï¼? It is a high effective pre-vulcanization inhibitor. It's applied in NR,SBR,BR,IIR,CR,EPM,EPDM, NBR with cure system consisting of sulfur and Thiazole but mainly Sulphenamide Accelerator. Suitable for the all kinds of tire, Rubber hose, belts and other rubber products. Packing: Paper/plastic laminated bags or paper bags of 20kg/25kg net. Stored in dry, cool and ventilate area. Avoiding moisture, fire and direct sunlight.