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Epoxies, Ect. 20-2521
| Category: | PUR, Unspecified , Polyurethane |
| Manufacturer: | Epoxies, Etc. |
| Trademark: | Epoxies, Ect. |
| Fillers: | - |
| Ports: | Qinzhou, Shekou, Shanghai, Ningbo |
| Delivery Terms | FOB, CIF, DAP, DAT, DDP |
| PDF: | zvxGRG_Epoxies-Ect-20-2521.pdf  |
| PRICE: | Order Products email sales@su-jiao.com |
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| Message |
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20-2521 is a high performance two component urethane system. This easy to use polyurethane is very low in viscosity and ideal for potting or encapsulating delicate electronic components. 20-2521 exhibits very low shrinkage, stress, and exotherm throughout the cure cycle. This system is also well known for its outstanding thermal shock and excellent dielectric properties. 20-2521 is ideal for potting applications where a wide operating temperature (-55 to +130°C) is required. It is also a good choice when exposure to salt water, mild acids and bases, and aliphatic hydrocarbons is expected. Features:
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| General Information | |
|---|---|
| Features |
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| Uses |
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| Appearance |
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| Processing Method |
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| Physical | Nominal Value | Unit | |
|---|---|---|---|
| Molding Shrinkage - Flow | 0.71 | % |
| Thermal | Nominal Value | Unit | |
|---|---|---|---|
| CLTE - Flow | 1.6E-4 | cm/cm/°C |
| Electrical | Nominal Value | Unit | |
|---|---|---|---|
| Surface Resistivity | 4.6E+13 | ohms |
| Thermoset | Nominal Value | Unit | |
|---|---|---|---|
| Thermoset Mix Viscosity (25°C) | 5500 | cP |
| Additional Information | Nominal Value | Unit | |
|---|---|---|---|
| Operating Temperature | -55.0 to 130 | °C | |
| Thermal Shock 1(-65 to 130°C) | Pass |
| Uncured Properties | Nominal Value | Unit | |
|---|---|---|---|
| Color | Black | ||
| Mix Ratio by Weight (PBW) | |||
| Part A | 100 | ||
| Part B | 20 | ||
| Mix Ratio by Volume (PBV) | |||
| Part A | 100 | ||
| Part B | 26 | ||
| Density | |||
| 25°C 2 | 1.20 | g/cm³ | |
| 25°C 3 | 1.60 | g/cm³ | |
| Viscosity | |||
| 25°C 4 | 0.20 | Pa·s | |
| 25°C 5 | 15 | Pa·s | |
| Curing Time | |||
| 85°C | 0.66 | hr | |
| 65°C | 1.5 | hr | |
| 45°C | 2.5 | hr | |
| 25°C | 24 | hr | |
| Pot Life 6(25°C) | 75 | min |
| Cured Properties | Nominal Value | Unit | |
|---|---|---|---|
| Water Absorption | |||
| -- 7 | 0.19 | % | |
| -- 8 | 0.55 | % | |
| Shore Hardness (Shore D) | 65 | ||
| Tensile Strength | 11.0 | MPa | |
| Tensile Elongation at Break | 40 | % | |
| Electric Strength | 25 | kV/mm | |
| Relative Permittivity (100 Hz) | 4.80 | ||
| Volume Resistivity | 1.2E+14 | ohms·cm | |
| Dissipation Factor (60 Hz) | 0.72 |
| Note Message | |
|---|---|
| 1 . | 10 cycles |
| 2 . | Part B |
| 3 . | Part A |
| 4 . | Part B |
| 5 . | Part A |
| 6 . | 1 lb. mass |
| 7 . | After 24 hours |
| 8 . | After 7 days |
| Resin Grade | Manufacturer | Category | Trademark |
|---|---|---|---|
| Topilene® J700 | Hyosung Corporation | PP Homopolymer | Topilene® |
| Alpha PVC 3006-90 CLEAR 0217 | AlphaGary | PVC, Flexible | Alpha PVC |
| DJSilicone NE-345 | DONGJUE SILICONE (NANJING) CO., LTD | Silicone | DJSilicone |
| Hapflex™ 561-6 | Hapco Inc. | TP, Unspecified | Hapflex™ |
| EMERGE™ PC 8702-15 (NA) | Trinseo | PC | EMERGE™ |
