What Is P-Toluenesulfonyl Isocyanate

P-Toluenesulfonyl Isocyanate (PTSI) is an important organic compound, with a CAS number of 4083-64-1. This compound is a colorless to light yellow transparent liquid.

Due to its high reactivity and strong selectivity, it is widely applied in fields such as organic synthesis, pharmaceutical and chemical engineering, and materials science. PTSI, as a dehydrating agent, is widely used in multiple industrial fields, mainly including:

1.Polyurethane coating system

It is used for dehydration treatment of solvents, fillers and pigments

It is applied to the wet-curing one-component and two-component polyurethane paint systems

The recommended addition amount is 0.5%-4% of the total formula (corresponding to a humidity environment of 0.05%-0.3%).

2.Other chemical products

Dehydration treatment of paints and adhesives

Dehydration of materials such as asphalt tar

The core mechanism of action of p-methylbenzenesulfonyl isocyanate (PTSI) as a dehydrating agent is that its isocyanate group (-NCO) undergoes a chemical reaction with water to generate carbon dioxide and p-toluenesulfonamide, thereby achieving the dehydrating effect.

Compared with other dehydrating agents, PTSI has the following significant advantages.

• Performance improvement:

Effectively reduce the loss of gloss and yellowing of coatings caused by moisture.

Reduce the generation of reaction foam.

• Stability guarantee:

It can be used as a stabilizer to prevent the deterioration of diisocyanate.

The shelf life can reach more than 6 months in a sealed and dry environment.

• Process adaptability:

It is applicable to various polyurethane systems.

It has a small impact on the viscosity of the system.

Overall, PTSI, due to its characteristics, is widely used as a dehydrating agent in the industrial field. Unilong, a manufacturer of PTSI, can stably supply PTSI with 99%min purity, high quality. If you are intersted in this product, welcome to send inquiry!