Park Aerospace F-552
- Chemical Family
- Phenols & Phenolics
Park’s F-552 is a high purity silica filled phenolic resin coated on high strength grade silica fabric. F-552 is used in the manufacture of intermediate temperature ablative rocket nozzles, heat shields, and combustion chambers in highly oxidative environments.
Product families
Applications
- Aerospace & Aviation
Product Families
- Thermoset Prepregs
Other characteristics
- Functions
- Prepreg
- Polymer Name
- Phenolic Compound
- Processing Methods
- Compression Molding, Prepreg Processing
- Reinforcement Material
- Other Reinforcement Material
- Markets
- Automotive & Transportation
- Technology
- Composite Materials
- Product Forms
Available in Broadgoods, Chopped Molding Compound and Bias Tape; Solution coated fabrics up to 38" inches wide; Compatible with Autoclave or Press Molding processes
- Fillers Included
- Silica
- Quality Standards
- MIL-R-9299C
- WS-21053
- Material Features
- Ablation Resistant
- Prepreg Storage Life
- Out Life
- 30 days @ 75°F
- Shelf Life
- 6 months @ 40°F (dry)
- Benefits and Features
Provides a combination of high-strength and ablative properties for demanding applications.; Low thermal expansion; Good Tack and Drape properties; Conforms to WS-21053; Resin conforms to MIL-R-9299
- Applications and Qualifications
- Rocket Nozzles
- Combustion Chambers
- Heat Shields
- Rocket Motor Throat Sections
- Composite Materials Functions
- Prepreg
- Composites Processing Methods
- Compression Molding
- Prepreg Processing
- Autoclave Cure Cycle
Apply 24"Hg vacuum (minimum) for 1 hour before beginning heat cycle; Apply 10 psi autoclave pressure; Raise product temperature from RT to 250°F at 2 - 5°F/min; Increase autoclave pressure to 40psi, vent vacuum at 15 – 20 psi; Hold product at 250 ± 5°F for 30 minutes; Raise product temperature to 325 ± 5°F at 2 - 5°F/min; Hold product at cure temperature for 60 – 90 minutes; Cool to 150°F at no at no more than 8°F/min prior to releasing autoclave pressure
- Press Cure Cycle (Chopped Molding Compound)
- Apply 1,000 - 2,000 psi pressure during cure
- Cure product at 325°F for 90 – 120 minutes
Technical data
Table 1 of 2
9 rows| Characteristic | Value | Unit | Method |
|---|---|---|---|
| Nominal Prepreg Weight | 30 | oz/sqyd | — |
| Resin Solids Content | 29 - 36 | % | — |
| Filler Content | 4 - 11 | % | — |
| Resin Flow (325°F, 150 psi) | 10 - 20 | % | — |
| Volatiles (325°F, 10 min) | 3 - 5.5 | % | — |
| Nominal Cured Ply Thickness | 0.021 | — | — |
| Barcol Hardness | 70 | — | ASTM-D-2583 |
| CTE - With Ply (75 - 340°) | 5.8 | μin/inꞏºF | ASTM-E-831 |
| CTE - Across Ply (75 - 340°) | 18.8 | μin/inꞏºF | ASTM-E-831 |
Table 2 of 2
16 rows| Characteristic | Value | Unit | Method |
|---|---|---|---|
| Specific Gravity | 1.8 | g/cc | ASTM-D-792 |
| Specific Heat | 0.26 | BTU/lb°F | ASTM-C-351 |
| Thermal Conductivity - With Ply (250°F) | 0.29 | BTU/ft2-hr°F | ASTM-C-177 |
| Thermal Conductivity - Across Ply (250°F) | 0.4 | — | ASTM-C-177 |
| Thermal Diffusivity - With Ply (250°F) | 0.014 | ft2/hr | ASTM-C-177 |
| Thermal Diffusivity - Across Ply (250°F) | 0.012 | — | ASTM-C-177 |
| Cure Cycle (325°F) | 1000 | psi | — |
| Tensile Strength - Dry (75°F) | 16.48 | Ksi | ASTM-D-638 |
| Tensile Modulus - Dry (75°F) | 1.25 | Msi | ASTM-D-638 |
| Tensile Strength - Dry (90° 75°F) | 16.5 | Ksi | ASTM-D-638 |
| Tensile Modulus - Dry (90°C 75°F) | 1.3 | Msi | ASTM-D-638 |
| Compressive Strength - Dry (75°F) | 60.8 | Ksi | ASTM-D-695 |
