VS-3 Polyurethane Spray Foam Open Cell Blend Polyols 200-300 mgKOH/g Hydroxyl Value for Rigid Insulation
VS-3 Polyurethane Spray Blend Polyols is a specialized formulation using 245fa blowing agent as an environmentally preferred alternative to HCFC-141B. When reacted with isocyanate, it produces high-performance rigid foam insulation with exceptional characteristics.
- Fine and uniform cellular structure
- Low thermal conductivity for superior insulation
- Excellent flame resistance properties
- Outstanding low temperature dimensional stability
| Property | Value |
|---|---|
| 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 |
| Component | Parts by Weight |
|---|---|
| VS-3 Blend Polyols | 100 |
| Isocyanate | 100-105 |
Measured at system temperature of 20°C (values may vary based on processing conditions)
| Parameter | Value |
|---|---|
| Cream Time | 3-5 seconds |
| Gel Time | 6-10 seconds |
| Property | Test Method | Value |
|---|---|---|
| Spray Density | GB 6343 | 30-40 kg/m³ |
| Closed-cell Rate | GB 10799 | ≥90% |
| Initial Thermal Conductivity (15°C) | GB 3399 | ≤24 mW/(m·K) |
| Compressive Strength | GB/T 8813 | ≥150 kPa |
| Adhesive Strength | GB/T 16777 | ≥120 kPa |
| Elongation at Break | GB/T 9641 | ≥10% |
| Dimensional Stability (-20°C, 24h) | GB/T 8811 | ≤1% |
| Dimensional Stability (70°C, 24h) | GB/T 8811 | ≤1.5% |
| Water Absorption | GB 8810 | ≤3% |
| Oxygen Index | GB 8624 | ≥26 |
This polyurethane spray foam system is ideal for various thermal insulation applications using spray technology, including:
- Cold storage rooms and refrigeration facilities
- Industrial tanks and containers
- Large-scale pipeline insulation
- Commercial and industrial building insulation
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