Diisocyanate DI

Covestro Desmodur H hexamethylene diisocyanate HDI

abbreviation	HDI
molecular formula	C8H12N2O2
molecular weight	168.19
CAS number	822-06-0

Product Features

Property	Value
Exterior	Colorless or light yellow liquid
Boiling point@101kPaa	255 ° C
molecular mass	168.2
Freezing point	-67 ℃
NCO%	49.7%～49.9%
Viscosity@25 ℃	3mPa · s
Relative density	1.05
Flash point (open cup)	135 ℃
Refractive Index@20 ℃	1.4530
Specific heat capacity@25 ℃	1.75J/ （ g · K ）
Boiling point@0.67kPa @1.33kPa @2.67kPa	112 ℃ 120～125 ℃ 140～142 ℃
Vapor Pressure@20 ℃	1.3～1.5Pa
Hydrolyzed chlorine	≤0.03%
purity	≥99.6%

application
HDI is an aliphatic isocyanate, and the resin made of it has obvious yellowing resistance.
Derivatives of HDI can be used as isocyanate curing agents, which are divided into three types: HDI monomer-TMP, HDI biuret, and HDI trimer. They are curing agents for high-grade polyurethane adhesives and coatings. In particular, the trimer as a curing agent has the properties of low viscosity and easy storage, and the finished products have excellent heat resistance, light resistance, weather resistance and solvent resistance.

Package
200kg/drum