Aromatic diamine chain extender for polyurethane elastomers. Its relatively low reactivity allows it to be used in TDI or MDI prepolymer systems, with crosslink density tunable by adding higher-functionality polyols.
Product Code
MDBA
4,4′-Methylenebis[N-sec-butylaniline] (MDBA)
CAS Number
5285-60-9
EINECS
226-122-6
Description
Synonyms
Cross-Reference
Comparable products from other manufacturers, for identification purposes only.
Key applications
- Chain extender for TDI and MDI polyurethane elastomers
Characteristics
| Molecular formula | C21H30N2 |
|---|---|
| Molecular weight | 310.48 |
| Appearance | Clear, light-to-dark-brown liquid |
| Amine value | 362 mgKOH/g |
| Density (20°C) | 0.995 g/cm3 |
| Specific gravity (26.7°C) | 0.98-0.99 |
| Flash point (TCC) | 161°C |
| Water | ≤ 0.05% |
| Equivalent weight with isocyanates | ≥ 153 |