4,4’ DIPHENYLMETHANE DIISOCYANATE (MDI)
MDI IS IDEALLY SUITED FOR HIGH-PERFORMANCE POLYURETHANE ELASTOMER APPLICATIONS.
Description
Intro
4,4’ DIPHENYLMETHANE DIISOCYANATE ( MDI ) IS A DIFUNCTIONAL ISOCYANATE. IT IS A WHITE-TO-PALE YELLOW SOLID AT AMBIENT TEMPERATURES BUT IT CAN BE SUPPLIED IN BULK TANKERS AS A COLOURLESS-TO-PALE YELLOW LIQUID. THE PRODUCT IS RECOMMENDED FOR THE MANUFACTURE OF A WIDE RANGE OF ELASTOMERIC POLYURETHANES. THESE INCLUDE MICROCELLULAR AND SOLID CLASTOMERS FOR SHOE SOLING, POLYURETHANE SYNTHETIC LEATHER AND AUTOMOTIVE APPLICATIONS.
MDI IS IDEALLY SUITED FOR HIGH-PERFORMANCE POLYURETHANE ELASTOMER APPLICATIONS.
Properties
| Appearance | White- to -pale yellow Solid at ambient temperatures |
| Specific gravity at 50 deg℃ | 1.18 |
| Viscosity at 50 degC, mPa.s | 4.7 |
| Isocyanate(NCO)value(a) % by wt NCO groups
(group wt = 42) |
33.5 |
| Flash point (b), deg℃ | 213 |
| Fire point(b), deg℃ | > 220 |
| Acidity, % as HCL. | 0.0005 |
| Functionality | 2.0 |
| Melting point, deg℃ | > 38 |
| Isomer content (2.4’), % max. | 2.5 |
| (a) corrected for hydrolysable chlorine(b) Cleveland Cup, ASTM method D92 | |
