Principal Properties & Application:
ALITA 191 resin is an unsaturated polyester resin primarily made from phthalic anhydride. It has medium viscosity and moderate reactivity. ALITA 191 resin has low viscosity, excellent mechanical properties, high elongation rate, fast curing, and versatility, making it suitable for various fiberglass reinforced plastic products such as translucent sheets and ventilation ducts.
Technical Specifications of Liquid Resin:
| Item | Scope | Unit | Test Method |
| Exterior | Pale yellow transparent viscous liquid | - | - |
| Acid Value | 19-25 | mgKOH/g | GB/T 2895-2008 |
| Viscosity, 25℃ | 0.30-0.60 | Pa.s | GB/T 7193-2008 |
| Solid Content | 59-65 | % | GB/T 7193-2008 |
| Thermal Stability, 80°C | ≥24 | h | GB/T 7193-2008 |
| Gelation Time, 25℃ | 6-18 | min | GB/T 7193-2008 |
Note: Curing system in GT test: Accelerator (0.6%Co/Naph): 2%;Hardener Nouryon M-50: 2%;
Physical Properties of Casting (for reference only)：
| Item | Typical Value | Unit | Test Method |
| Exterior | Casting without defects | - | - |
| Barcol hardness | 42 | - | GB/T 3854-2005 |
| Heat distortion temperature | 60 | ℃ | GB/T 1634-2004 |
| elongation at break | 2.2 | % | GB/T 2567-2008 |
| Tensile Strength | 60 | Mpa | GB/T 2567-2008 |
| Tensile modulus | 3800 | Mpa | GB/T 2567-2008 |
| Bending strength | 110 | Mpa | GB/T 2567-2008 |
| Flexural modulus of elasticity | 3800 | Mpa | GB/T 2567-2008 |
Typical Values of Fiberglass Reinforced Plastics (FRP):
| Item | Typical value | Unit | Test Method |
| Barcol hardness | 64 | - | GB/T 3584-2005 |
| Bending strength | 300 | Mpa | GB/T 1449-2005 |
| Flexural modulus of elasticity | 17000 | Mpa | GB/T 1449-2005 |
| Tensile Strength | 320 | Mpa | GB/T 1447-2005 |
| Tensile modulus of elasticity | 16000 | Mpa | GB/T 1447-2005 |
Note:
- The casting process follows GB/T 8237-2005, with a curing system consisting of 0.5% Co/oct promoter and 2.0% Butanox M-50 curing agent.
- After casting, the curing treatment involves 24 hours at room temperature, followed by 2 hours at 60°C and 2 hours at 80°C.
- After applying fiberglass reinforcement, the curing treatment involves 24 hours at room temperature, followed by 3 hours at 60°C and 3 hours at 110°C.
Instruction and attention:
- ALITA 191 resin contains wax and does not contain promoters or thixotropic agents.
- For applications requiring high toughness or food-grade requirements, we recommend selecting ALITA 196 resin.
Handling and Storage:
This resin contains ingredients which could be harmful if mishandled. Contact with skin and eyes should be avoided and necessary protective equipment and clothing should be worn.
Drums - It is highly recommended that all material is stored at stable temperatures below 25°C (77°F). Avoid exposure to heat sources such as direct sunlight or steam pipes. To avoid contamination of product with water, do not store outdoors. Keep sealed to prevent moisture pick-up and monomer loss. Rotate stock.
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