Phthalate-based SMC/BMC Compression Molding Resins
Palapreg® P 171-909 is specifically designed for SMC/BMC production processes. It is primarily used in automotive, electrical, and building materials applications and offers excellent value for money.
Key Properties
- Thickening and Stability
- Good electrical properties
- Good water resistance
- Excellent flow properties
Typical Applications
Palapreg® P 171-909 is specifically designed for SMC/BMC production processes. For standard SMC/BMC products, Palapreg® P 171-909 offers good flow properties and is particularly suitable for injection-molded BMC and larger, structurally complex products.
Transportation products: Front fascia panels, bumpers, and other truck components;
Electronics and Appliances: Large-sized electrical products, such as insulating panels, motors, and insulators;
Bathroom and Building Materials: Door panels, civil defense doors, wall panels, chassis, etc.;
Specialty Products: Water tank panels and products requiring water resistance.
Product Specifications
| Performance | Value | Unit | Test Method |
|---|---|---|---|
| Appearance | Clear | - | TM 2265 |
| Viscosity @23°C | 1250–1450 | mPa·s | TM 2013 |
| Solid Content, Infrared-Dried Acid Number | 62–65 | % | TM 2033 |
| Acid value | 18–22 | mg KOH/g s | TM 2401 |
| Gel time | 115–150 | TM 2261 |
TM2261: 130°C Reactivity
test: Add 1.0 g of TXC (Butanox®) to 100 g of resin
Typical Properties of Liquid Resin
| Property | Value | Unit | Test Method |
|---|---|---|---|
| Flash Point | 33 | °C | TM 2800 |
| Shelf life, without anti-polymerization agent, protected from light, 25°C | 3 | Months |
Typical Properties of Pure Resin Castings
| Property | Value | Unit | Test Method |
|---|---|---|---|
| Tensile Strength¹ | 65 | MPa | ISO 527-2 |
| Tensile Modulus¹ | 3.3 | GPa | ISO 527-2 |
| Elongation at break¹ | 2.7 | % | ISO 527-2 |
| Flexural strength¹ | 115 | MPa | ISO 178 |
| Flexural modulus¹ | 3.4 | GPa | ISO 178 |
| Heat Deflection Temperature (HDT)¹ | 125 | °C | ISO 75 Ae |
| Glass Transition Temperature Tg¹ | 150 | °C | ASTM D570 |
| Notched Impact Strength¹ | 10 | kJ/m² | ISO 179 |
Post-curing conditions
Curing conditions: 24 hours at room temperature, followed by 24 hours of post-curing at 80°C
Test conditions: Temperature 23±2°C, relative humidity 50±5%
Recommended Initial Paste Formulation for SMC
| Components | Value |
|---|---|
| Palapreg® P 171-909 | 60 |
| Palapreg® H 892-02 | 40 |
| TBPB | 1.5 |
| Zinc stearate | 4.5 |
| Heavy calcium carbonate | 180 |
| MgO paste (35% content) | 3 |
Processing Guidelines
Palapreg® P 171-909 is typically used in combination with Palapreg® H 892-02 to produce low-shrinkage products.Generally, the ratio of Palapreg® P 171-909 to Palapreg® H 892-02 is 6:40, but this can be adjusted as needed based on actual conditions.Depending on the dimensional requirements of the final product, 300 ppm to 600 ppm of p-benzoquinone may be added to the formulation (calculated based on the total weight of resin and low-shrinkage additives).