MSI, PTSI 4083-64-1 dehydrating agent MSI, PTSI 4083-64-1
MSI, PTSI 4083-64-1 dehydrating agent MSI, PTSI 4083-64-1

HARTTIVE MSI (PTSI)

Common Name:PTSI / TI
Similar Name:Tosylisocyanate, p-toluenesulfonyl isocyanate
Molecular Formula:C8H7NO3S
Molecular Weight：197.21
Content %:≥ 99.0
UN No.:2206
CAS Number:4083-64-1

HARTTIVE MSI (PTSI) is a mono-isocyanate with high reactivity, widely employed as a dehydrating agent in chemical products, including solvents, fillers, pigments, and pitch tar applications. It also functions as a moisture scavenger for solvent-based PU coatings, sealants, adhesives, and serves as a chemical intermediate. In PU coating/paint applications, HARTTIVE MSI can prevent undesirable premature reactions and act as a stabilizer for moisture-curing materials, preventing deterioration or discoloration during storage.

 

Package

20 KG/Iron Drum.

It can be packaged on demand. Please inquire.      


Harttive MSI (PTSI) reacts with water, giving off carbon dioxide and resulting in the formation of reaction products which are soluble in conventional paint formulations. Approximately 12g of the stabilizer is theoretically required for reacting with 1g of water. Experience has shown, however, that the reaction is more effective in the presence of a surplus of HARTTIVE MSI(PTSI). Compatibility with paint binders should always be tested beforehand.

p-toluenesulfonyl isocyanate is recommended to be used as a chain terminator during polymerization and as a remover of unwanted reactive functional groups in PU raw materials. In coal tar PU coatings, Harttive MSI can be used to neutralize amines and OH functional groups and remove water in tar to avoid foaming and premature gelation when tar is mixed with PU prepolymer.

Dosage

Adding 1.2% of Harttive MSI to tar kerosene can completely neutralize the 0.1% active amine and OH functional groups contained in tar kerosene. Similarly, adding 2.4% of Harttive MSI can remove 0.1% of water from tar, zinc powder, paint, and solvents. When using a higher amount of Harttive MSI than normal, it can neutralize the moisture, amines or active OH groups in the coating formulation, such as Single-component moisture-cured PU or Dual-component PU causing the curing rate and the final physical properties to be significantly reduced.


Chemical Namep-Toluenesulfonyl isocyanate
CAS No.4083-64-1
Molecular Weight (g/mol)197.21
AppearanceAlmost colorless liquid
NCO Content (%)20.0 ± 1
Melting Point (°C)-2
Flash Point (°C)150
Density (g/cm3 @20°C)1.29
Self Life6 months since production date.
Purity (%)96 min.
Package20 KGS/iron drum

 

 


  • Single-component and Dual-component polyurethane adhesives and sealants
  • Single-component and Dual-component polyurethane coatings and paints
  • Solvents
  • Pigments
  • Fillers
  • Reagents