Chemical/Physical Properties
Palapreg® P 17-02 is an unsaturated polyester resin derived from phthalic acid and standard ethylene glycol, dissolved in styrene. Palapreg® P 17-02 has medium viscosity and high reactivity.
major application
Palapreg P 17-02 is used in the production of SMC and BMC. It is mainly used with Palapreg polymer components for SMC/BMC applications with low shrinkage or low relief. The resin is easily thickened by magnesium oxide.
Product specifications at the time of delivery
| causality | realm | unit (of measure) | Test Methods |
|---|---|---|---|
| Viscosity, 23°C | 1,300 – 1,500 | mPa.s | 2013 |
| Chromaticity, APHA | 0–140 | - | 2017 |
| Solid content, IR | 63 - 66 | % | 2033 |
| exterior condition | open (non-secretive) | - | 2265 |
| water content | 0.04 – 0.07 | % | 2350 |
| Acid value (so) | 15–19 | mg KOH/g | 2401 |
| stickiness | 450000 - 900000 | mPa.s | 2914A |
| Gel time, 130°C | 65–110 | unit of angle or arc equivalent one sixtieth of a degree | 2261 |
| peak time | 110–155 | unit of angle or arc equivalent one sixtieth of a degree | 2261 |
| peak temperature | 265–290 | °C | 2261 |
Viscosity: Z2/100/23°C
Reactivity: Determined by adding 1 gram of TBPB to 100 grams of resin.
Typical Values Refractive Index (23°C - TM 2150) = 1.523 - 1.527
Properties of liquid resins (typical values)
| causality | numerical value | unit (of measure) | TM |
|---|---|---|---|
| Density, 20°C | 1100 | kg/m³ | 2160 |
| flash point | 33 | °C | 2800 |
| Stability, Not Started, Dark, 25°C | 3 | months | - |
Properties of unfilled resins (typical values)
| causality | numerical value | unit (of measure) | TM |
|---|---|---|---|
| Density, 20°C | 1200 | kg/m³ | DIN 53479 |
| bending strength | 100 | MPa | ISO 178 |
| bending modulus | 3.8 | GPa | ISO 178 |
| Outer fiber strain | 2.8 | % | ISO 178 |
| tensile strength | 60 | MPa | ISO 527-2 |
| Tensile modulus of elasticity | 3.8 | GPa | ISO 527-2 |
| Elongation at break | 1.7 | % | ISO 527-2 |
| Impact strength - unnotched specimen | 8 | kJ/m² | ISO 179 |
| Heat Deflection Temperature (HDT) | 140 | °C | ISO 75-A |
| Glass transition temperature (Tg) | 170 | °C | ISO 537 |
Properties of SMC molded parts (typical values)
| causality | numerical value | unit (of measure) | TM |
|---|---|---|---|
| Glass content | 30 | % | - |
| Density, 20°C | 1700 | kg/m³ | DIN 53479 |
| bending strength | 200 | MPa | ISO 178 |
| bending modulus | 13 | GPa | ISO 178 |
| Outer fiber strain | 2.7 | % | ISO 178 |
| tensile strength | 100 | MPa | ISO 527-2 |
| Tensile modulus of elasticity | 11 | GPa | ISO 527-2 |
| Elongation at break | 1.9 | % | ISO 527-2 |
| Impact strength - unnotched specimen | 110 | kJ/m² | ISO 179 |
| Molding shrinkage | 0.25 | % | DIN 53464 |
| Glass transition temperature (Tg) | 200 | °C | DIN 53445 |
| Coefficient of linear thermal expansion (0-60°C) | 23-10-⁶ | K-¹ | DIN 53752/A |
| bulk resistivity | 10¹⁴ | Α-cm | DIN 53482 |
| surface resistance | 10¹² | Α | DIN 53482 |
| Comparative Leakage Index | CTI 600 | - | DIN IEC 112 |
Properties of SMC molded parts (typical values)
| ingredient | weights |
|---|---|
| Palapreg® P 17-02 | 100 |
| TBpB | 1.5 |
| Styrene | 5 |
| Polyethylene powder | 5 |
| Calcium carbonate | 150 |
| Zinc stearate | 4 |
| MgO-paste (35% MgO content) (MgO-paste (35% MgO)) | 3 |
Processing:
Palapreg® P 17-02 is typically used for standard SMC/BMC or with Palapreg® polymer solution for low shrinkage/low bulge SMC and BMC.Typically, the ratio of Palapreg® P 17-02 to polymer solution is 60:40, but this can be adjusted if necessary.
Depending on the size of the molded part, it is recommended that 300 to 600 ppm of para-benzoquinone (calculated on the basis of epoxy resin plus thermoplastic solution) be added to the system.