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SMC/BMC Resin/
Overview
ALITA 520 Neopentyl Glycol (NPG) Type Unsaturated Polyester Resin for SMC/BMC
Category：SMC/BMC ResinCode：ALITA 520
Applications
ALITA 520 is a neopentyl glycol (NPG) type unsaturated polyester resin specifically designed for SMC/BMC molding processes. The resin system features high reactivity and low liquid viscosity, combined with excellent colorability and controlled thickening behavior. Cured products exhibit flat surfaces with high gloss, superior water and heat resistance, high mechanical strength, and excellent electrical insulation properties. Widely used in electrical components, industrial parts, sanitary ware, and automotive composite structures.
- Processing Features: High reactivity, low liquid viscosity, excellent thickening consistency, and outstanding pigment colorability.
- Product Advantages: Cured parts present flat surfaces with high gloss, superior water and heat resistance, high mechanical strength, and good electrical insulation.
- Primary Applications: Widely used in SMC/BMC composite applications including electrical components, industrial structural parts, sanitary ware, and automotive parts.
Specifications
| Inspection Item | Specification Range | Unit | Test Standard |
|---|---|---|---|
| Appearance | Light yellow translucent liquid | -- | GB/T 8237.6.1.1 |
| Viscosity (25℃) | 600 - 800 | mPa·s | GB/T 7193.4.1 |
| SPI-GT (Gel Time) | 6.0 - 8.0 | min | HK-D-DB001 |
| SPI-CT (Curing Time) | 7.0 - 10.0 | min | HK-D-DB001 |
| SPI-PET (Peak Exotherm) | 240 - 260 | ℃ | HK-D-DB001 |
| Acid Value | 12.5 - 15.5 | mgKOH/g | GB/T 2895 |
| Solid Content | 59.0 - 63.0 | % | GB/T 7193.4.3 |
| Moisture Content | ≤ 0.08 | % | HK-D-DB007 |
| Color (Hazen) | ≤ 35 | -- | HK-D-DB036 |
Note: SPI test ratio condition: 2% BPO paste formulation used.
Properties
| Property Item | Measured Value | Unit | Test Standard |
|---|---|---|---|
| Tensile Strength | 50 | MPa | GB/T 2568 |
| Tensile Modulus | 3000 | MPa | GB/T 2568 |
| Elongation at Break | 1.5 | % | GB/T 2568 |
| Flexural Strength | 100 | MPa | GB/T 2570 |
| Flexural Modulus | 3300 | MPa | GB/T 2570 |
| Impact Strength | 8.5 | kJ/m² | GB/T 2571 |
| Barcol Hardness | 48 | -- | GB/T 3854 |
| Heat Deflection Temp (HDT) | 130 | ℃ | GB/T 1634 |
Specimen Preparation & Curing Schedule:
1. Preparation standard: Executed per GB/T 8237. Curing system: 0.6% Co-Naph 1%, AKZO M-50 1%.
2. Post-curing procedure: Room temperature × 24 hours + 60℃ × 3 hours + 110℃ × 2 hours.
Storage & Handling
- Transport Compliance: Transport must strictly comply with hazardous chemical safety regulations.
- Storage Environment: Store in a cool, ventilated place below 25°C. Keep away from fire and heat sources. Keep container tightly sealed to prevent moisture ingress and monomer evaporation.
- Shelf Life: Under standard storage conditions below 25°C, shelf life is 3 months.
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