Polyurethane Rigid Foam Used For Household Appliance
1. Introduction
Exceedfoam has good mixing property, stable foaming, excellent
fluidity, commonly used in the production of refrigerators,
kitchen, freezers insulation layer. The foam produced by the
combination of polyether and polymerized MDI has better thermal
insulation performance and low temperature dimensional stability.
2. Typical physical properties
| Property | Exceedfoam |
| Appearance | Yellow transparent liquid |
| Viscosity(25℃), mpa.s | 300-700 |
| Density(20℃), g/ml | 1.10-1.14 |
| OHV, mgKOH/g | 250-400 |
| Water content, (%) | 1.0-3.0 |
| Property | Polymeric MDI |
| Appearance | Brown Liquid |
| Viscosity(25℃)/(mPa·s) | 150-250 |
| NCO Content/% | 30.5-32.0 |
| Density (25℃)/(g/cm3) | 1.220-1.250 |
| Acid Content/% | ≤0.030 |
| Hydrolysable Chlorine/% | ≤0.20 |
3. Reaction characteristics
Hand mixing
(Raw material temperature 22±2℃, Material ratio 1:1.10-1.25) | Data |
| Mixing Time,s | 6-8 |
| Cream Time,s | 8-20 |
| Gel Time,s | 60-100 |
| Free Rise Density,Kg/m3 | 22.0-30.0 |
4. Typical foam properties
| Project | Data |
| Core density,Kg/m3 | 30-45 |
| Dimensional stability, (-30℃ 24h), % | ≤1.5 |
| Thermal conductivity,15℃,(W/m.K) | ≤0.021 |
| Obturator rate,(%) | ≥90 |
| Water absorption rate(%) | ≤4 |
5. Storage and transportation
Galvanized steel barrels, Net weight 210 kg for Exceedfoam, Net
weight 250 kg for Polymeric MDI.
When stored, moist and wet conditions should be avoided. Above
40℃,a deterioration of the product quality would be caused. Short
term warming or cooling does not damage the product. This product
belongs to the non-flammable and explosive.
6. Expiration date
Under recommended storage conditions. EXCEEDFOAM has a shelf
life of 6 months. Polymeric MDI has a shelf life of 12 months.
