Features and main purposes:
885 is a kind of unsaturated polyester resin synthesized with main materials of phthalic anhydride and standard diatomic alcohol, having dissolved in styrene,It is characterized by lower viscosity，Relatively high hardness.especially for imitation granite/marble and handicrafts, with features of excellent strength, toughness.
Specification of liquid resin：(25℃)：
| Items | Unit | Testing result | Test Method |
Appearance | --- | Transparent yellowish viscous liquid | GB/T8237.6.1.1 |
Viscosity | Pa·s | 0.5-0.85 | GB/T 7193-2008 |
Acid Value | mgKOH/g | 15-26 | GB/T 2895-2008 |
Geltime | Min（25℃） | 3.5-6.5 | GB/T 7193-2008 |
Shelf life | H（80℃） | ≥24 | GB/T 7193-2008 |
Note: 25°C gel time test: 25°C water bath, adding 1ml peroxide methyl ethyl ketone solution and 1ml iso-octanoic acid cobalt solution into 50g resin
Casting matrix(typical valu)：
| Items | Unit | Test performance | Test Method |
Casting matrix | |||
Tensile strength | MPa | ≥60 | GB/T2567-2008 |
Tensile Modulus | MPa | ≥3000 | GB/T2567-2008 |
Break elongation rate | % | ≥3.0 | GB/T2567-2008 |
Flexible strength | MPa | ≥100 | GB/T2567-2008 |
Flexible Modulus | MPa | ≥3200 | GB/T2567-2008 |
Heat Distortion Temp | ℃ | ≥55 | GB/T1634-2004 |
Barcol hardness | --- | ≥40 | 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;