| Customization: | Available |
|---|---|
| Formula: | Ho[CH2CH2o]Nh |
| Material: | Polyurethanes/PU |
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Introuction
DonSpray 502 is a spray-blend polyol that reacts with isocyanate to produce foam with outstanding properties, including:
Fine and uniform cells
Low thermal conductivity
Excellent fire resistance
Superior low-temperature dimensional stability
It is ideal for various thermal insulation applications using spray methods, such as cold rooms, large vessels, extensive pipelines, and both exterior and interior walls of buildings.
There are more specifications. Please contact me to send the catalogue.
| Appearance | Pale yellow to brown viscous liquid |
|---|---|
| Hydroxyl Value | 200-300 mgKOH/g |
| Dynamic Viscosity (25°C) | 100-200 mpa.s |
| Specific Gravity (20°C) | 1.12-1.20 g/ml |
| Storage Temperature | 10-25°C |
| Storage Stability | 6 months |
Recommended Ratio
| Component | Ratio (pbw) |
|---|---|
| Spray 502 | 100 |
| Isocyanate | 100-105 |
Reactivity Characteristics
Component temperature is 20°C. The actual value varies depending on the pipe diameter and processing conditions.
| Item | Time (s) |
|---|---|
| Cream Time | 3-5 |
| Gel Time | 6-10 |
Foam Performances
| Items | Test Method | Index |
|---|---|---|
| Spray Density | GB 6343 | ≥35kg/m³ |
| Closed-cell Rate | GB 10799 | ≥90% |
| Initial Thermal Conductivity (15°C) | GB 3399 | ≤24mW/(m·K) |
| Compressive Strength | GB/T8813 | ≥150kPa |
| Adhesive Strength | GB/T16777 | ≥120kPa |
| Elongation at break | GB/T9641 | ≥120kPa |
| Dimensional Stability (24h -20°C) | GB/T8811 | ≥10% |
| Dimensional Stability (24h 70°C) | GB/T8811 | ≤1% |
| Water Absorption | GB 8810 | ≤1.5% |
| Oxygen Index | GB 8624 | ≥26 |
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