Low-viscosity 4,4’-bis(secondary amino) diphenylmethane polyurethane chain extender, a low-toxicity eco-friendly alternative to MOCA.
Product Features
· Similar molecular structure and reactivity to MOCA with superior toughness
· In polyurethane elastomers: enhances mechanical strength, adhesion, impact resistance and low-temperature performance, delivers smoother surface finish
· In sprayed polyurea: extends gel time, improves flowability and surface smoothness, strengthens interlayer adhesion
· In rigid PU foam: raises compressive strength and dimensional stability, reduces brittleness, increases closed-cell ratio to lower thermal conductivity and boost thermal insulation
· In flexible PU foam: improves tensile strength, tear strength and load-bearing capacity; shortens demolding time for cold-molded foams
Technical Specifications
| Item | Index |
| Appearance | Pale yellow transparent liquid |
| Viscosity at 25°C (mPa·s) | 300–800 |
| Specific Gravity (g/cm³) | 1.06±0.02 |
| NH Equivalent Weight (g/mol) | 269 |
| Equivalent OH Content (%) | 6.32 |
| Solids Content (%) | ≥98 |
Recommended Applications
· Polyurethane elastomers & elastic coatings
· Rigid and flexible polyurethane foams
· Sprayed polyurea
Packaging
200 kg per metal drum
Shelf Life
This product is flammable. Store at temperature ≤40°C away from ignition sources in a cool, dry and well-ventilated warehouse. Shelf life is 12 months.
Disclaimer
All data herein is verified accurate under specified test conditions. Users shall conduct independent trials to confirm suitability for their unique applications. Contact our company for inquiries or detailed technical documents.
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