Cyclohexylthiophthalimide, Anti-scorcher PVI(CTP)

N-cyclohexylthiophthalimide is also known as scorch retardant, early vulcanization inhibitor, anti-scorch agent CTP, and anti-scorch agent PVI. It is white, light yellow or light yellow-brown crystal at room temperature. The product recrystallized from n-heptane is white crystal.

Easily soluble in acetone, benzene, toluene, ether, ethyl acetate and ethyl acetate, slightly soluble in gasoline, insoluble in kerosene and water, soluble in hot carbon tetrachloride, ethanol and heptane. React cyclohexane with hydrochloric acid to form chlorinated cyclohexane. Then use sulfur for sulfurization to prepare chlorothiocyclohexane. Finally, this product is prepared by reacting phthalimide and chlorothiocyclohexane in the presence of acid absorbent.

It can be used for natural rubber and synthetic rubber. It can effectively prevent the rubber material from scorching during processing and improve production efficiency. At the same time, it has a restorative effect on rubber materials that have experienced high heat or are slightly scorched. N-cyclohexylthiophthalimide is widely used in sulfur-vulcanized elastomers and has good anti-scorch effects when used with various general accelerators.

Use with the anti-scorch agent CTP, whether it is open or high-temperature rapid internal mixing, a one-stage mixing process can be used to effectively prevent scorch. It can be used together with accelerator M, DM, TMTD and effective or semi-effective vulcanization system to improve rubber properties. It can improve the production efficiency of calendering and extrusion. It is beneficial to improve the adhesion between rubber and brass-plated steel wire. It is widely used in various general-purpose rubbers and special rubbers including nitrile rubber, ethylene-propylene or EPDM rubber, butyl rubber and chloroprene rubber. During storage, avoid excessively high or too low temperatures and humidity, and store in a ventilated and dry place to avoid heat and moisture. Flammable, low toxicity.