Features and main purposes:
118（A）O-phthalate unsaturated polyester resin is molded SMC/BMC resin, with high viscosity and high reactivity. Its products feature good heat resistance, excellent mechanical and electrical properties.
Specification of liquid resin：(25℃)： (25℃)：
| Items | Unit | Testing result | Test Method |
Appearance | --- | Transparent yellowish liquid | GB/T8237.6.1.1 |
Viscosity（25℃） | Pa·s | 1.6-2.0 | GB/T 7193-2008 |
Acid Value | mgKOH/g | 16-22.5 | GB/T 2895-2008 |
High Temperature Gel Time | Min | 6.5-10.5 | GB/T 7193-2008 |
Note: High temperature gel time test: 50% BPO powder 2.0%
Specification of casting resin(typical value):
| Items | Unit | Measured value | Test Method |
Tensile strength | MPa | 62 | GB/T2567-2008 |
Tensile Modulus | MPa | 3250 | GB/T2567-2008 |
Break elongation rate | % | 2.6 | GB/T2567-2008 |
Flexible strength | MPa | 88 | GB/T2567-2008 |
Flexible Modulus | MPa | 3200 | GB/T2567-2008 |
Heat Distortion Tem | ℃ | 120 | GB/T1634-2004 |
Barcol hardness | --- | 45 | GB/T3854-2005 |
Note: (1) Casting matrix sample is made according to GB/T8237-2005; with temperature of 25°C, curing system: promoter RCA 1.0%, Curing agent M-50 1.5%.
(2) Post-curing treatment of casting matrix: room temperature×24 Hours+60°C×3 Hours+80°C×2 Hours;