Urethane Modified Vinyl Ester Resins
Atlac® 580 ACT resin-based products have high mechanical properties, excellent corrosion and heat resistance. Atlac® 580 ACT resin has good process performance, can be applied to carbon fiber, aramid fiber, glass fiber reinforced composite materials.
Characteristic performance
- Low exothermic, can be used for thick products with one layer.
- Excellent wettability for glass, carbon, and aramid fibers
- Low shrinkage properties
- Excellent heat resistance and toughness
- Bubble-free curing system, even with standard MEKP
Product Properties
Atlac® 580 ACT is a pre-promoted, thixotropic, high performance urethane bisphenol A vinyl ester resin with medium viscosity and medium reactivity. Atlac® 580 ACT offers an excellent combination of corrosion resistance, heat resistance and flexibility.
Atlac® 580 ACT also offers excellent process and curing properties.
typical application
Atlac® 580 ACT is a resin specially developed to meet the requirements of the hand-lay-up and spraying processes, and is recommended for use in chemical-resistant equipment and the fabrication of ships.
Atlac® 580 ACT has excellent wettability to glass fibers, which facilitates air removal, while minimizing air bubbles inside and on the surface of the laminate by generating fewer air bubbles relative to conventional vinyl ester resins when used with standard MEKP. Due to the incorporation of urethane in Atlac® 580 ACT, thixotropy is easily obtained with standard grade fumed silica and compatibility with carbon, glass and aramid fiber reinforcements is improved. Atlac® 580 ACT has a low exotherm in the curing process, allowing thick products to be molded in a single pass, while its excellent curing properties ensure excellent thin-layer curing.
Final products based on Atlac® 580 ACT have excellent water resistance and good thermal stability.
Atlac® 580 ACT is resistant to most acidic salts, alkaline media and hot water, while providing excellent heat resistance and toughness.
Accreditations and Certificates
The cured Atlac® 580 ACT resin casting performs according to the German standard DIN 16946/2, type 1310.
The Atlac® 580 ACT complies with subgroup 7B of the European standard EN 13121/1.
The resin is certified by Lloyd's Register and Italian Naval Register for use in shipbuilding.
Product Indicators
| performances | numerical value | unit (of measure) | Test Methods |
|---|---|---|---|
| exterior condition | muddy | - | TM 2265 |
| acid value | 4.0-8.0 | mg KOH/g | TM 2401 |
| Solids content, infrared drying | 49.5-52.5 | % | TM 2033 |
| Viscosity, 2s-1 | 1000-1600 | mPa.s | TM 2313 |
| Viscosity, 20s-1 | 500-600 | mPa.s | TM 2313 |
| Viscosity, 250s-1 | 370-430 | mPa.s | TM 2313 |
| Gel time ,25-35℃ | 25.5-31.5 | minutes | TM 2313 |
| Curing time 25℃-exothermic peak | 42.5-52.5 | minutes | TM 2625 |
| exothermic peak | 125-155 | ℃ | TM 2625 |
Viscosity test: Z2/23°C
Reactivity test: 1.5 g of curing agent Butanox® M50 (Nouryon) was added to 100 g of resin.
Typical Properties of Liquid Resins
| performances | numerical value | unit (of measure) | Test Methods |
|---|---|---|---|
| flash point | 33 | ℃ | TM 2800 |
| Storage period, no polymerization inhibitor, protected from light, 25°C | 3 | moon | - |
Pure resin casting body properties (typical values)
| performances | numerical value | unit (of measure) | Test Methods |
|---|---|---|---|
| intensity | 1110 | Kg/m³ | - |
| tensile strength | 83 | MPa | ISO 527-2 |
| tensile modulus | 3.5 | GPa | ISO 527-2 |
| Tensile elongation at break | 4.2 | % | ISO 527-2 |
| bending strength | 153 | MPa | ISO 178 |
| bending modulus | 3.55 | GPa | ISO 178 |
| heat distortion temperature | 115 | ℃ | ISO 75 Ae |
| glass transition temperature | 132 | ℃ | DIN 53445 |
| Unnotched impact strength | 15 | kJ/m² | ISO 179 |
| Water absorption (25°C) | 0.16 | % | ISO R 62 |
| Water absorption (100°C) | 0.22 | % | ISO R117 |
| barcolithic hardness | 40 | Barcol | ASTM D2583 |
Add 1.5g of hardener Butanox® M50 (Nouryon) to 100g of resin and cure at room temperature.
After 24 hours, then post-cure at 100°C for 3 hours
Test conditions: temperature 23 ± 2 ℃, relative humidity 50 ± 5%
Properties of glass fiber reinforced resin composites (typical values)
| performances | numerical value | unit (of measure) | Test Methods |
|---|---|---|---|
| intensity | 1320 | Kg/m³ | - |
| Glass fiber content | 30 | % | - |
| tensile strength | 105 | MPa | ISO 527-2 |
| tensile modulus | 7.4 | GPa | ISO 527-2 |
| bending strength | 160 | MPa | ISO 178 |
| bending modulus | 6.8 | GPa | ISO 178 |
| compressive strength | 175 | MPa | ASTM D695 |
| Unnotched impact strength | 115 | kJ/m² | ASTM D256 |
| Coefficient of linear expansion | 30 x 10-⁶ | K-¹ | ASTM D696 |
| thermal conductivity | 0.21 | W/m-K | DIN 52612 |
1.5 g of hardener Butanox® M50 (Nouryon) was added to 100 g of resin;
The laminates are layered with short-cut felt OCF M 710 or Vetrotex M 113 (450 g/m²);
Room temperature curing for 24 hours, then post-curing at 100°C for 3 hours
Operating Environment and Resin Performance Characteristics
Gel time in cup: 3.0 g of medium reactivity MEKP in 200 g of resin.
| temp | cup coagulation time | unit (of measure) |
|---|---|---|
| 15°C | 45 | minutes |
| 20°C | 35 | minutes |
| 25°C | 20 | minutes |
Resin Gel Time and Hardness Growth (Typical Values)
Laminate lay-up: 4 layers of short-cut felt (450g/m²);
Ambient temperature: 23 ℃
| typology | 1.5% MEKP | 2.0% MEKP | unit (of measure) |
|---|---|---|---|
| Resin Cup Setting Time | 28 | 24 | minutes |
| Laminate Gel Time | 42 | 37 | minutes |
Barcol Hardness (ASTM D2583)
| timing | 1.5% MEKP | 2.0% MEKP | unit (of measure) |
|---|---|---|---|
| 1.5 | 0 | 0 | Barcol |
| 2.0 | 10 | 10 | Barcol |
| 2.5 | 20 | 20 | Barcol |
| 3.0 | 30 | 30 | Barcol |
| 24 | 40 | 40 | Barcol |
| 48 | 40 | 40 | Barcol |
Process Operation Guide
- The resin needs to be stored at a suitable temperature and humidity for a constant period of time before use, and the operating temperature should normally be above 15°C when using the MEKP/Co curing system;
- Atlac® 580 ACT resin contains accelerators and should be used with the curing agent MEKP, which should be kept within the validity period.
- The temperature of the workshop should be maintained between 18℃ and 32℃, and the humidity of the workshop should be maintained between 40% and 90%. Constant shop conditions will result in constant gel time and help the manufacturer produce high quality products.
- At lower temperatures, dimethylaniline (DMA) can be used to adjust the gel time.
- The final cured state of the product prior to use can be post-cured for a few hours at high temperatures (e.g. 80°C) to achieve optimum physical and chemical properties.