English name: N, N, N’, N”, N”-Pentamethyldiethylenetriamine
Molecular formula: C9H23N3
Molecular weight: 173.3
Physical and chemical properties
Pentamethyldiethylenetriamine is a colorless to pale yellow clear liquid that is readily soluble in water.
Viscosity (25 ° C): 2mPa.s
Relative density (20 ° C): 0.8302-0.8306
Flash point (closed loop): around 72 °C
Flash point (PMCC): 83.3 ° C
Boiling range: 196-201 ° C or 70-80 ° C (1100 Pa)
Steam pressure (21 ° C): 0.29 * 133pa
Freezing point: <-20 °C
System of law
Pentamethyldiethylenetriamine is generally obtained by N-methylation of diethylenetriamine as a raw material, and the methylation method includes a formic acid/formaldehyde method, a formaldehyde hydrogenation method, and the like.
Characteristics and uses
Pentamethyldiethylenetriamine is a highly reactive, strong foaming polyurethane catalyst that can also be used to balance overall foaming and gelling reactions. It is widely used in a variety of polyurethane rigid foams, including polyisocyanuric acid sheet hard foam, can also improve foam fluidity, thus improving product production processes and improving product quality. Pentamethyldiethylenetriamine can also be used alone as a catalyst for polyurethane foam formulations, or with other catalysts such as DNSHA. When used alone as a hard foam catalyst, the amount is in the range of 1.0 to 2.0 parts by mass per 100 parts by mass of the polyol. In addition to its use in hard foam formulations, pentamethyldiethylenetriamine can also be used in the production of polystyrene blister foams and molded foams.