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Pultrusion Resin/
Overview
ALITA 239 Isophthalic UPR (High Performance Pultrusion Special)
Category：Pultrusion ResinCode：ALITA 239
Applications
ALITA 239 is a high-performance unsaturated polyester resin primarily synthesized from isophthalic acid, featuring medium viscosity and high reactivity.
- Core Features: Exhibits excellent tintability, high mechanical strength, and good chemical corrosion resistance.
- Physical Advantages: Features low sensitivity to cracking, resulting in a significantly long fatigue life. The finished product surface exhibits superior heat resistance.
- Typical Applications: Specifically designed for pultrusion molding processes, suitable for composite products requiring high weather resistance, strength, and fatigue resistance.
Specifications
| Inspection Items | Specification Range | Unit | Test Method |
|---|---|---|---|
| Appearance | Light yellow transparent liquid | -- | -- |
| Acid Value | 27 - 31 | mgKOH/g | GB/T 2895-2008 |
| Viscosity (25℃) | 0.6 - 0.7 | Pa·s | GB/T 7193-2008 |
| Solid Content | 62 - 68 | % | GB/T 7193-2008 |
| Thermal Stability (80℃) | ≥ 24 | h | GB/T 7193-2008 |
| Gel Time (25℃) | 4.0 - 6.0 | min | GB/T 7193-2008 |
Gel Time Test Condition: 25℃ constant temperature water bath. Add 0.9g accelerator (1% Co) and 0.9g M-50 (Nouryon) to 50g of resin.
Properties
| Inspection Items | Typical Value | Unit | Test Method |
|---|---|---|---|
| Barcol Hardness | ≥ 42 | -- | GB/T 3854-2005 |
| Heat Distortion Temp (HDT) | 78 | ℃ | GB/T 1634-2004 |
| Elongation at Break | 3.5 | % | GB/T 2567-2008 |
| Tensile Strength | 75 | MPa | GB/T 2567-2008 |
| Tensile Modulus | 3400 | MPa | GB/T 2567-2008 |
| Flexural Strength | 128 | MPa | GB/T 2567-2008 |
| Flexural Modulus | 3700 | MPa | GB/T 2567-2008 |
Experimental Notes:
1. Casting method follows GB/T 8237-2005.
2. Curing system: Accelerator 0.6% Co Naph 1.0% + Curing agent Enox BPO-50F 1.0%.
3. Post-treatment: Room temp 24h + 60℃ 3h + 110℃ 2h.
Usage Instructions
1. Composition: ALITA 239 resin does not contain wax, accelerators, or thixotropic agents.
2. Recommended Pultrusion Formulation: Suggest using BPO curing agent (0.5-2.0%) and TBPB curing agent (0.5-1.5%). The actual selection should comprehensively consider equipment specifications, product thickness, process temperature, and pultrusion speed.
3. Shrinkage Control: When manufacturing thick-walled products, it is recommended to add low-shrinkage additives to reduce shrinkage risk.
4. Selection Guidance: For applications in strongly corrosive environments, choosing Epoxy Vinyl Ester ALITA 901 resin is recommended.
Storage & Handling
- Safety Protection: Avoid skin and eye contact; must wear protective clothing, gloves, and goggles during operation.
- Environmental Control: Strongly recommended to store in a cool place below 25℃ (77℉). Keep away from direct sunlight, fire sources, and steam pipes.
- Management: Keep containers sealed; prevent moisture absorption and styrene monomer evaporation. Manage stock following the "First-In, First-Out" principle.