Unsaturated polyester resins of m-phenylene neopentyl glycol type for light-curing pipe rehabilitation
P92 I-908 Resin-Based Composites Provide Rapid Rehabilitation of Drainage Lines in No-Excavation Conditions
Characteristic performance
- Controlled thickening properties
- Controlled process operating time
- Quickly impregnates glass fibers
- The desired size can be obtained
- High long-term service performance retention
typical application
Palatal? P 92 I-908 is particularly suitable for FRP products with outstanding chemical resistance and high mechanical strength in tanks, vessels, hydraulic engineering, piping, shipbuilding, corrosion protection and the electronics industry.
Palatal? P 92 I-908 can be used exclusively for the production of glass fiber reinforced prepregs. This prepreg is ideally suited for the rehabilitation of sewer pipes.
Product Indicators
performances | numerical value | unit (of measure) | Test Methods |
---|---|---|---|
exterior condition | open (non-secretive) | - | TM_2265 |
Solids content, infrared drying | 52.0-55.0 | % | TM_2033 |
Viscosity @23℃ | 650-750 | mPa.s | TM_2013 |
Gel time (25°C to 35°C) | 7-11 | min | TM_2500 |
peak exothermic temperature (physics) | 180-210 | ℃ | TM_2500 |
Viscosity test: S 2/100 s-1/23°C
Reactivity determined by UV test lamp (300w, Osram)
Typical Properties of Liquid Resins
performances | numerical value | unit (of measure) | Test Methods |
---|---|---|---|
Refractive index, 23°C | 1.5390 | - | 2150 |
flash point | 33 | °C | TM 2800 |
Storage period, protected from light, 25 °C | 6 | moon | - |
volumetric shrinkage | 8.0 | % | Pref-VS |
Typical Properties of Pure Resin Casting Body
performances | numerical value | unit (of measure) | Test Methods |
---|---|---|---|
tensile strength | 85 | MPa | ISO 527-2 |
tensile modulus | 3.6 | GPa | ISO 527-2 |
Tensile elongation at break | 5.6 | % | ISO 527-2 |
bending strength | 150 | MPa | ISO 178 |
bending modulus | 4 | GPa | ISO 178 |
Heat Distortion Temperature HDT | 107 | °C | ISO 75-2 |
Glass transition temperature Tg | 130 | °C | ISO 6721-2 |
Unnotched impact strength | 20 | kJ/m2 | ISO 179 |
Curing conditions
100g of resin with 1.0 ml CHP-NA (Peroxid-Chemie GmbH) and 0.1 ml cobalt isooctanoate solution (1% diluted into styrene). Post-curing: 100°C for 24 hours
Process Operation Guide
- Appropriate additives (e.g., paraffin solutions) must be added in order for products made with Palatal? P 92 I-908 resin to be non-tacky after curing on the natural molding surface in contact with air.
- Palatal? P 92 I-908 can be cured with conventional curing agents and low energy UV light (wavelength 365-420nm). If the resin is not exposed to direct sunlight, the operating time duration can be extended to several hours. Curing where direct sunlight or UV exposure is not required can be achieved by adding 0.5 ml of tert-butyl peroxy-2-ethylhexanoate (e.g., Arkema's Luperox 26 or AkzoNobel's Trigonox 21) to 100 g of resin. The addition of small amounts of peroxide is recommended for all applications where low styrene residues are required. If a small amount of peroxide is added to the resin, it can be post cured at 80oC for a few hours for better performance.