| Customization: | Available |
|---|---|
| Formula: | Ho[CH2CH2o]Nh |
| Material: | Polyurethanes/PU |
|
Still deciding? Get samples of $ !
Request Sample
|
Suppliers with verified business licenses
Audited Supplier Audited by an independent third-party inspection agency
Introuction
Pipe 322 is a blend polyol that uses 141b as a blowing agent. It reacts with MDI to produce pipe shell foam, offering excellent properties such as uniform foam cells, low thermal conductivity, and no shrinkage at low temperatures. It is widely used in steam heat pipes, LNG, and various other low-temperature insulation projects.
Physical Properties
| Property | Value |
|---|---|
| Appearance | Light yellow transparent viscous liquid |
| Hydroxyl Value | 150-250 mgKOH/g |
| Dynamic Viscosity (25°C) | 150-300 mPa.s |
| Density (20°C) | 1.10-1.20 g/ml |
| Storage Temperature | 10-25°C |
| Storage Stability | 6 months |
Recommended Ratio
| Component | Ratio (Pbw) |
|---|---|
| Pipe 322 Blend Polyols | 100 |
| Isocyanate | 110-130 |
Technology and Reactivity
(The exact value varies depending on processing conditions)
| Item | Manual Mixing | High Temperature Machine |
|---|---|---|
| Material Temperature | 25°C | 25°C |
| Moulding Temperature | 40-45°C | 40-45°C |
| Cream Time | 8-15 s | 6-12 s |
| Gel Time | 40-60 s | 25-45 s |
| Free Density | 25-30 kg/m³ | 25-30 kg/m³ |
Foam Performances
| Items | Test Method | Index |
|---|---|---|
| Foam Density by Moulding | ASTM D1622 | ≥50kg/m³ |
| Closed Cell Rate | ASTM D1940 | ≥90% |
| Thermal Conductivity (15°C) | ASTM C518 | ≤22mW/(m·K) |
| Compressive Strength (perpendicular to the direction of rising) | ASTM D1621 | ≥250kPa |
| Dimensional Stability (24h, -20°C) | ASTM D2126 | ≤1.0% |
| Dimensional Stability (24h, 100°C) | ASTM D2126 | ≤1.5% |
){kind=link}