Corrosion-Resistant Solutions for Extremely High Temperatures: Composite products made from the phenolic-epoxy-vinyl ester resin
Atlac® 590UHT exhibit exceptional mechanical properties in high-temperature service environments and demonstrate outstanding corrosion resistance against oxidizing media, organic solvents, and other substances.
Key Properties
- Relatively low styrene outgassing, making it more environmentally friendly
- High cross-linking density
- Resistance to temperatures above 200°C
- Excellent resistance to heat aging
- Demonstrates excellent corrosion resistance against strong acids, oxidizing media, and other media at higher temperatures.
Typical Applications
Atlac® 590UHT resin is the resin of choice for composite materials used at high service or design temperatures. This resin is designed to facilitate the production of composite products via hand lay-up, spray-up, filament winding, compression molding, and resin transfer molding (RTM) processes.
Atlac® 590UHT resin has been used to manufacture chemical storage tanks and pipelines, flue gas desulfurization (FGD) system equipment, chimneys, scrubbers, and flue ducts.
Due to its high cross-linking density, Atlac® 590UHT resin exhibits excellent resistance to organic solvents.
Product Specifications
| Performance | Value | Unit | Test Method |
|---|---|---|---|
| Appearance | Transparency | - | TM 2265 |
| Solid Content | 67.0–71.0 | % | TM 2033 |
| Infrared-dried viscosity @23°C | 450–550 | mPa·s | TM 2013 |
| Gel time (25°C to 35°C) | 28–38 | minutes | TM 2625 |
Reactivity test: Add 1.0 g of Butanox® M50 curing agent and 1.0 g of NL-49P accelerator to 100 g of resin, respectively.
Typical Properties of Liquid Resin
| Property | Value | Unit | Test Method |
|---|---|---|---|
| Flash Point | 33 | °C | TM 2800 |
| Shelf life, without initiator, protected from light, 25°C | 6 | months | - |
Typical Properties of Pure Resin Castings
| Property | Value | Unit | Test Method |
|---|---|---|---|
| Tensile Strength | 72 | MPa | ISO 527-2 |
| Tensile Modulus | 3.7 | GPa | ISO 527-2 |
| Elongation at break | 2.3 | % | ISO 527-2 |
| Flexural strength | 115 | MPa | ISO 178 |
| Flexural modulus | 3.5 | GPa | ISO 178 |
| Heat Deflection Temperature (HDT) | 200 | °C | ISO 75 Ae |
| Glass Transition Temperature (Tg) | 210 | °C | ASTM D570 |
| Notched Impact Strength | 10 | kJ/m² | ISO 179 |
The curing system consists of adding 1.0 g of Butanox M50 curing agent and 1.0 g of NL 49P accelerator to 100 g of resin.Cure at room temperature for 24 hours, followed by post-curing at 130°C for 3 hours. For the
above curing system, after curing at room temperature for 24 hours and post-curing at 130°C for 3 hours, perform additional post-curing at 200°C for 24 hours.
Process Operating Guidelines
- Maintain the curing agent dosage between 1.0% and 2.0% of the total resin weight to achieve sufficient cured strength;
- The workshop temperature should be maintained between 18°C and 32°C, and the humidity between 40% and 90%. Consistent workshop conditions ensure a consistent gel time and help manufacturers produce high-quality products.
- Given that Atlac® 590UHT is a highly reactive resin, CuHP (isopropylbenzene peroxide) is the recommended curing agent. Products cured at room temperature in contact with air should have a surface that is relatively non-tacky to the touch.However, these products may not be fully cured and therefore may not exhibit the same chemical resistance as fully cured products. If no further lamination layers are planned, a 10% solution of styrene containing 5% paraffin wax (melting point: 46–48°C) can be added to the final resin layer to achieve a non-tacky surface.
- Because Atlac® 590UHT resin cures rapidly, the use of isopropylbenzene-hydrogen peroxide catalyst is recommended. For very thin composite parts, methyl ethyl ketone peroxide with a high dimer content may be used.
- Atlac® 590UHT composites that have already cured at room temperature should be cured for an additional two hours at 70–100°C to achieve optimal cure and performance.
Application Guidelines
Due to the excellent curing properties of Atlac® 590UHT resin, complete all secondary bonding as quickly as possible. Exposing laminated composite materials to sunlight can cause serious secondary bonding issues.After 48 hours of curing, sand the laminated composite with 16–24-grit (14–20-mesh) sandpaper to ensure
good secondary bonding, especially when the laminated composite surface is resin-rich. Avoid low glass fiber content and resin buildup.