LOW VISCOSITY 100% EPOXY CASTING RESIN
META-CAST 405 is a low viscosity 100% epoxy resin which contains no reactive diluents, plasticizers, or other modifiers. Optimum amounts of fillers may be incorporated into META-CAST 405 for control of shrinkage and other physical properties. Upon addition of a hardener, the viscosity is further reduced, so that casting, potting, encapsulation and sealing operations are easily effected. Thermal mechanical and electrical properties of the cured resin are excellent.
TYPICAL PROPERTIES OF LIQUID META-CAST 405
| Appearance | Light, amber, mobile liquid |
| Viscosity @ 25°C (cps) | 7200 |
| Specific Gravity, 25°/25°C | 1.18 |
| Storage Life @ 25°C | 6 months |
CHARACTERISTICS OF LIQUID RESIN HARDENER MIXTURES
| PROTOVIC HARDENERS | |||||
| 5 | 12 | 14 | 16 | 23 | |
| Mixing Ratio (phr) | 9.5 | 13 | 8 | 24 | 25 |
| Viscosity @ 25°C (cps) | 900 | 1000 | 750 | 500 | 1000 |
| Working Life 1-lb. @ 25°C | 90 min. | 30 min. | 140 min. | 4 hrs. | 24 min. |
| Exotherm (°C) | 170 | 180 | 170 | 150 | 175 |
| Cure Schedules | A | B | C | D | A |
1. 14 to 24 hrs. @ room temperature, or gel at R.T. plus 2 hrs. at 100°C
2. 14 to 24 hrs. @ room temperature, or gel at R.T. plus 4 hrs. at 40°C
3. Gel at R.T. plus 2 hrs. at 100°C, or 1 hr. at 120°C
4. 2 hrs at 125°C or B-Stage 26 hrs. plus 1 hr at 150°C
NOTES:
1. HARDENER 16 resin mixtures gel to a thermoplastic B stage at room temperature. The resin then is cured to an infusible plastic (if desired) by post curing according to listed schedule.
2. HARDENER 23 is a minimum irritation potential hardener and practically eliminates hazards from dermatitis.
TYPICAL CHARACTERISTICS OF CURED RESIN*
| PROTOVIC HARDENERS | |||||
| #5 | #12 | #14 | #16 | #23 | |
| Specific Gravity 25°/25°C | 1.19 | 1.19 | 1.2 | 1.19 | 1.21 |
| Operating Range (°C) | -50 to +185 | -50 to +200 | -50 to +150 | -50 to +220 | -50 to +200 |
| Structural Deformation Temperature (°C) | 76 | 80 | 76 | 160 | 110 |
| Tensile Strength, psi | 8,000 | 9,000 | 8,000 | 14,000 | 11,000 |
| Compressive Strength, psi | 30,000 | 16,000 | 30,000 | 38,000 | 18,000 |
| Dielectric Strength (volts/mil) | 480 | 520 | 490 | 500 | 485 |
| Power Factor @ 1000 cycles | 0.01 | 0.01 | 0.0016 | 0.03 | 0.01 |
| Dielectric Constant @ 1000 cycles | 3.7 | 4.1 | 3.8 | 3.6 | 4.2 |
| Volume Resistivity (ohm-cm) | 10^14 | 10^16 | 10^14 | 10^14 | 10^15 |
*All tests performed in accordance with latest ASTM procedures.
For many casting and encapsulation applications, the selection of the proper fillers increases the utility and upgrades the physical properties of the resin system.
Specific detailed physical characteristics of filled systems based on META-CAST 405 can be supplied. The following chart should aid the user in the proper selection of filled resin systems.
FILLER SYSTEM OUTSTANDING CHARACTERISTICS OBTAINED
| META-CAST 405-VMA | Very high resistance to moisture over wide temperature range, very low moisture vapor permeability. |
| META-CAST 405-AP | Increased surface hardness, scratch resistance, impact strength, low water absorption |
| META-CAST 405ST | Lower shrinkage, reduced filler settling |
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Technical information and recommendations made by Protavic America, Inc. concerning products and uses or applications hereof, are based on reliable laboratory tests and are believed to be accurate. No warranty, however, is expressed or implied, or is any warranty expressed or implied as to results to be obtained from use of said materials, whether used singly or in combination with other products. No statements made are to be construed as constituting a license under any existing patent.