Polyester Mastic
PR-1300 / PR-1500
PR-1300
| Properties | Unit | Value | Test Method |
|---|---|---|---|
| Gel Time | Min | 10 ± 2 | ASTM D2471 |
| Max Cure Time | Min | 18 ± 2 | ASTM D2471 |
| Exothermic Peak | ℃ | 200 ± 10 | ASTM D2471 |
| Acid Value | mg KOH/gr | 30 ± 2 | ASTM 1639 |
| Solid Content | % | 65 ± 2 | ASTM D1259 |
| Viscosity (25 ℃) | Ford Cup | 80 ± 10 | ISO 2555 |
| Density | g/ml | 1.12 ± 0.02 | ISO 1675 |
| Shelf Life | Months | 3 |
0.1% Co 6% and 2 % MEKP to 100 g resin at 25 °C
| Properties | Unit | Value | Test Method |
|---|---|---|---|
| Tensile Strength | Mpa | 44 ± 5 | ISO 527-2/1A/2 |
| Flexural Strength | Mpa | 85 ± 10 | ISO 178 |
| HDT | ℃ | 75 ± 5 | ISO 75-2/Method 1e |
| Hardness | Barcol | 25 ± 5 | ASTM D2583 |
| Water Absorption | % | 0.29 ± 0.02 | ISO 62/Method 3 |
For Fully Cured resin : 0.25% Co 6% and 2 % MEKP to 100 g resin at 25 °C
1. 24 hrs at 25 °C,4 hrs at 90 °C
2. Curing Schedule : 24 hrs at 25 °C,4 hrs at 90 °C ,3 hrs at 120 °C
PR-1500
| Properties | Unit | Value | Test Method |
|---|---|---|---|
| Gel Time | Min | 9 ± 2 | ASTM D2471 |
| Max Cure Time | Min | 13 ± 2 | ASTM D2471 |
| Exothermic Peak | ℃ | 175 ± 10 | ASTM D2471 |
| Acid Value | mg KOH/gr | 25 ± 2 | ASTM 1639 |
| Solid Content | % | 71 ± 2 | ASTM D1259 |
| Viscosity (25 ℃) | Ford Cup | 40 ± 10 | ISO 2555 |
| Density | g/ml | 1.13 ± 0.02 | ISO 1675 |
| Shelf Life | Months | 12 | |
| Dilutability with Styrene | % | 110 ± 20 |
2% Paste to 100g resin at 25 ℃
PR-1300 and PR-1500 polyester mastics deliver a performance profile consistent with competitive unsaturated polyester mastic resins in industrial and construction applications.
With tensile strength around 44 ± 5 MPa and flexural strength near 85 ± 10 MPa for PR-1300, and HDT approximately 75 ± 5 °C, these mastics compare favorably against typical market formulations, which often range from moderate to high mechanical resistance depending on filler and resin content. PR-1500’s faster gel time, higher solid content, and lower viscosity facilitate easier handling and application on varied substrates.
Although some high-performance systems (e.g., vinyl ester-modified mastics or specialized filled compositions) may exceed specific metrics such as HDT or chemical resistance, the PR-1300/PR-1500 products offer a strong balance of mechanical strength, curing behavior, and processability at competitive production cost. This makes them suitable choices for general-purpose sealing, bonding, and gap-filling applications in marine, construction, and industrial contexts where economic efficiency and reliable cure are required.
