The
P92 I-908 resin-based composite material, a m-pentaerythritol-type unsaturated polyester resin for light-curing pipeline repair, provides a solution for the rapid repair of drainage pipelines under trenchless conditions
Key Properties
- Controllable thickening properties
- Controllable pot life
- Rapid penetration into glass fiber
- Achieves the desired dimensions
- High retention of long-term service performance
Typical Applications
Palatal® P 92 I-908 is particularly suitable for fiberglass-reinforced plastic (FRP) products requiring outstanding chemical resistance and high mechanical strength,
such as storage tanks, containers, hydraulic engineering structures, pipelines, shipbuilding, corrosion protection, and the electronics industry. Palatal® P 92 I-908 is specifically designed for the production of glass fiber-reinforced prepregs. These prepregs are ideal for the repair of sewer pipes.
Product Specifications
| Performance | Value | Unit | Test Method |
|---|---|---|---|
| Appearance | Transparent | - | TM_2265 |
| Solid Content, IR-dried | 52.0–55.0 | % | TM_2033 |
| Viscosity @23°C | 650–750 | mPa·s | TM_2013 |
| Gel Time (25°C to 35°C) | 7–11 | min | TM_2500 |
| Exothermic Peak Temperature | 180–210 | ℃ | TM_2500 |
Viscosity test: S 2/100 s⁻¹ at 23°C
. Reactivity determined using a UV test lamp (300 W, Osram)
Typical Properties of Liquid Resin
| Property | Value | Unit | Test Method |
|---|---|---|---|
| Refractive Index, 23°C | 1.5390 | — | 2150 |
| Flash point | 33 | °C | TM 2800 |
| Shelf life, protected from light, 25 °C | 6 | months | - |
| Volume shrinkage | 8.0 | % | Pref-VS |
Typical Properties of Pure Resin Castings
| Property | Value | Unit | Test Method |
|---|---|---|---|
| Tensile Strength | 85 | MPa | ISO 527-2 |
| Tensile Modulus | 3.6 | GPa | ISO 527-2 |
| Elongation at break | 5.6 | % | ISO 527-2 |
| Flexural strength | 150 | MPa | ISO 178 |
| Modulus of bending | 4 | GPa | ISO 178 |
| Heat Deflection Temperature (HDT) | 107 | °C | ISO 75-2 |
| Glass Transition Temperature (Tg) | 130 | °C | ISO 6721-2 |
| Notched impact strength | 20 | kJ/m² | ISO 179 |
Curing Conditions
Add 1.0 mL of CHP-NA (Peroxid-Chemie GmbH) and 0.1 mL of cobalt isooctanoate solution (1% diluted in styrene) to 100 g of resin. Post-curing: 100°C for 24 hours
Processing Guidelines
- To ensure that the natural contour surfaces of products made with Palatal® P 92 I-908 resin do not become tacky after curing when exposed to air, appropriate additives (such as a paraffin solution) must be added.
- Palatal® P 92 I-908 can be cured using conventional curing agents and low-energy UV light (wavelength 365–420 nm). If the resin is not exposed to direct sunlight, the working time can be extended to several hours.The curing area does not need to be directly exposed to sunlight or UV light; this can be achieved by adding 0.5 mL of tert-butyl 2-ethylhexanoate peroxide (such as Arkema’s Luperox 26 or AkzoNobel’s Trigonox 21) to 100 g of resin.The addition of a small amount of peroxide is recommended in all applications requiring low styrene residue. If a small amount of peroxide is added to the resin, post-curing at 80°C for several hours is recommended to optimize the performance of the finished product.