LT1304 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
LT1304 is specially formulated for foam injection insulation in cold storage machine rooms, refrigeration pipelines, equipment storage tanks, and low-temperature water tanks.
It features rapid foaming, excellent filling performance with no material leakage, no shrinkage, no voids, and no shell deformation.
Engineered for stable performance and reliable insulation, LT1304 ensures uniform foam formation and long-term thermal efficiency. It is compatible with various polyurethane spray and injection equipment, providing a dependable solution for refrigeration and low-temperature insulation applications.
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 |
|
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 | 5 |
| Fiber Time | 10–30 | s | 18 |
| Tack-Free Time | 7–14 | s | 21 |
| Free-Rise Density | 40–55 | kg/m³ | 43.2 |
Notes: Test temperature: 25°C, and mixing ratio P: I = 100:100 (P= LT1304, 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) | 600 ± 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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