Product Image
Pultrusion Resin/
Overview
ALITA 228 Orthophthalic UPR (Pultrusion / High Strength Type)
Category：Pultrusion ResinCode：ALITA 228
Applications
ALITA 228 is an unsaturated polyester resin based on phthalic acid, featuring medium viscosity and medium reactivity.
- Core Features: Exhibits extremely high mechanical strength and excellent toughness.
- Process Suitability: Specifically optimized for pultrusion processes, providing good continuous production stability.
- Typical Applications: Suitable for manufacturing pultruded products requiring strength and durability, such as:
- Tent poles, Gratings
- Door and window profiles, Various pultruded structural parts
Specifications
| Inspection Items | Specification Range | Unit | Test Method |
|---|---|---|---|
| Appearance | Yellow transparent liquid | -- | -- |
| Acid Value | 16 - 24 | mgKOH/g | GB/T 2895-2008 |
| Viscosity (25℃) | 0.65 - 0.7 | Pa·s | GB/T 7193-2008 |
| Solid Content | 65 - 70 | % | GB/T 7193-2008 |
| Thermal Stability (80℃) | ≥ 24 | h | GB/T 7193-2008 |
| Gel Time (25℃) | 4.3 - 6.3 | 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 | 3.0 | % | GB/T 2567-2008 |
| Tensile Strength | 75 | MPa | GB/T 2567-2008 |
| Tensile Modulus | 3500 | MPa | GB/T 2567-2008 |
| Flexural Strength | 125 | MPa | GB/T 2567-2008 |
| Flexural Modulus | 3800 | MPa | GB/T 2567-2008 |
Experimental Notes:
1. Casting method follows GB/T 8237-2005.
2. Curing system: 0.6% Cobalt Naphthenate 1.0% + Enox BPO-50F 1%.
3. Post-treatment: Room temp 24h + 60℃ 3h + 110℃ 2h.
Usage Instructions
1. Composition: ALITA 228 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 be based on specific equipment, product thickness, process temperature, and pultrusion speed.
3. Anti-cracking Measures: When making thick-walled or large-sized products, it is recommended to add low-shrinkage additives to reduce the shrinkage rate.
4. Selection Guidance:
- For higher heat and seawater resistance, ALITA 239 (Isophthalic) is recommended.
- For superior corrosion resistance, ALITA 901 (Epoxy Vinyl Ester) is recommended.
Storage & Handling
- Safety Protection: Wear necessary protective equipment during operation; avoid direct skin and eye contact.
- Environmental Control: Strongly recommended to store below 25℃. Outdoor storage is strictly prohibited; avoid direct sunlight and keep away from heat sources like steam pipes.
- Management: Keep containers sealed to prevent moisture absorption and monomer loss. Regularly rotate stock.
Related Products
Pultrusion Resin
ALITA 202 Orthophthalic UPR (High Light Transmittance / Lighting Panel Special)
ALITA 202
Pultrusion Resin
ALITA 210 Orthophthalic UPR (Pultrusion Process Special)
ALITA 210
Pultrusion Resin
ALITA 239 Isophthalic UPR (High Performance Pultrusion Special)
ALITA 239
Pultrusion Resin
ALITA 239L Modified Isophthalic UPR (Premixed Low Shrinkage / Pultrusion Special)
ALITA 239L
Pultrusion Resin
ALITA 262 Orthophthalic UPR (Extrusion / Pultrusion High Rigidity Type)
ALITA 262
Pultrusion Resin
ALITA 7016 Orthophthalic UPR (High Speed Extrusion / Pultrusion Special)
ALITA 7016