LT1305 is a premium two-component polyurethane system formulated with polyether polyol, polyester polyol, foam stabilizer, catalyst, blowing agent, and flame retardant. Combined with polymeric MDI, it delivers superior insulation performance, excellent processability, and long-term durability.
Isocyanate Component
Isocyanate: Polymeric MDI
Applications & Key Features
LT1305 is specifically designed for spray insulation applications in underground chilled water storage tanks and thermal energy storage systems.
It offers rapid foaming, seamless coating, smooth surface formation, excellent thermal insulation performance, and strong adhesion to various substrates. LT1305 ensures an even, pinhole-free polyurea coating surface, delivering both aesthetic and functional benefits.
Compatible with a wide range of polyurethane spray equipment, LT1305 provides a high-performance insulation solution ideal for energy storage and temperature-controlled construction projects.
Control Tests
The main testing parameters include reaction characteristics such as cream time and fiber time, and the core density of the free-rise foam.
Test Method: 120 g of total material at 25°C is poured into a 500 ml plastic cup to observe reaction behavior.
| Parameter | Value |
| Agitator Speed (rpm) | 1000–2000 |
| Agitator Diameter (mm) | 50 |
| Mixing Time (s) | 2–6 |
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Notes: After mixing, pour the mixed ingredients into a new cup. |
Reaction Results
| Test Item | Reference Range | Unit | Test Result |
| Cream Time | 2–6 | s | 3 |
| Fiber Time | 6–12 | s | 7 |
| Tack-Free Time | 7–14 | s | 8 |
| Free-Rise Density | 38–50 | kg/m³ | 41.8 |
Notes: Test temperature: 25°C, and mixing ratio P: I = 100:100 (P= LT1305, I = Polymeric MDI)
Typical Foam Properties
| Property | Typical Value |
| Pouring Density | 45–60 kg/m³ |
| Initial Thermal Conductivity | ≤ 0.024 W/m·K |
| Closed-Cell Content | ≥ 95% |
| Dimensional Stability | ≤ 1% |
Laboratory Test Data
| Test Item | Polyether Polyol | Isocyanate | Standard |
| Density (25°C) | 1.10 ± 0.05 g/cm³ | 1.24 ± 0.05 g/cm³ | GB/T 15223-2008 |
| Viscosity (25°C) | 500 ± 50 cps | 210 ± 40 cps | GB/T 12008.7-2010 |
Packaging & Storage
| Component | Packaging | Storage Temp | Shelf Life |
| Polyether Polyol | 220 kg / drum | 15–35°C | 3 months |
| Polymeric MDI | 250 kg / drum | 15–35°C | 12 months |
Both components are supplied separately in metal drums. Store in sealed metal drums in a cool, dry, and ventilated area. Avoid direct sunlight or moisture exposure.
Processing Requirements
| Parameter | Specification |
| Raw Material Temperature | 20–35°C |
| Demolding Time | Depends on product thickness |
| Machine Type | High-Pressure Polyurethane Spray Machine |
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