R2150A-2
Transparent Potting / Encapsulation Compound
Product Description
This product consists of liquid components, including a base component and a curing agent. The base component and curing agent are thoroughly mixed at a 10:1 weight ratio. With medium viscosity, the mixture cures — in any thickness — into a tough, transparent elastomer, suitable for electronic and electrical encapsulation and potting applications. The product cures within a temperature range of 25–150°C, with no exotherm and no post-cure required.
Product Features
- Low toxicity; no special precautions required in normal industrial handling
- No solvents or cure by-products; no exotherm during curing; non-corrosive; low shrinkage on cure
- Transparent and elastic after curing; vibration-resistant and damping against mechanical shock; low vibration transmission; components remain visually inspectable and repairable
- Environmentally friendly; low water absorption; good radiation resistance; low outgassing under high vacuum
- Stable over a wide temperature range; maintains elasticity, flexibility and stable performance from -50°C to 200°C, even in sealed conditions
- Heat resistance up to 150°C
Typical Applications
Transparent encapsulation and potting of electrical / electronic assemblies
Technical Data
| Test Item | Result |
|---|---|
| Before Curing | |
| Appearance | A: transparent liquid B: transparent liquid |
| Viscosity | A: 4500±500 mPa·s / B: 200±50 mPa·s |
| Processability | |
| Mixing ratio (by weight) | 10 : 1 |
| Working time (25°C) | > 2 h |
| Physical Properties after 4 h at 65°C | |
| Hardness (Shore A) | 50 ± 5 |
| Light transmittance (450 nm, 1 mm) | > 98 % |
| Tensile strength (MPa) | > 5.2 |
| Elongation at break (%) | > 120 % |
| Tear strength (kN/m) | > 2.3 |
| Dielectric strength | ≥ 18 kV/mm |
| Volume resistivity | 2.0×10¹⁴ Ω·cm |
| Dielectric constant | 3.0 @ 60 Hz |
Instructions for Use
The product is supplied as a two-part package; mix A and B at a 10:1 weight ratio. Automatic meter-mix dispensing systems or manual mixing may be used. It can cure at room temperature, or curing can be accelerated at elevated temperature. Cure times at various temperatures are as follows (allow longer times for large material volumes):
- 48 hours at 25°C
- 35 minutes at 100°C
- 20 minutes at 125°C
- 10 minutes at 150°C
Packaging
Part A: 20 kg/pail, 10 kg/pail; Part B: 2 kg/bottle, 1 kg/bottle
Storage & Transportation
- Store original A and B parts separately, tightly sealed, in a cool, ventilated indoor place below 25°C; shelf life 6 months. After the shelf life, the product may continue to be used if all technical indicators pass re-inspection.
- This product is non-hazardous and can be transported as a general chemical.
- Both A and B components must be kept sealed; take care to prevent leakage during transportation.
Safety Information
Refer to the Material Safety Data Sheet (MSDS) of this product.
Precautions
- R2150A-2 A/B is an addition-cure silicone material. Avoid contact with N, P, S, alkynes and dienes, as well as lead, tin, cadmium, mercury and other heavy metals, to prevent incomplete or inhibited cure. Surfaces to be potted must be cleaned before potting.
- Vacuum equipment should preferably be a dedicated open system and not shared with epoxy resins, to avoid cure inhibition. Ideally, set up a production line dedicated to silicone materials.
- Use mixing containers and stirring rods dedicated to silicone; avoid wearing rubber gloves when handling the silicone.
- Since the conditions and methods of use of our products are beyond our control, this technical information should not be used as a substitute for the user’s own testing. If there is any doubt about whether a particular substrate or material will inhibit curing, it is recommended to run a small-scale compatibility test first to determine suitability for a specific application, or consult our technical staff for assistance.
Notice
- The information contained herein is believed to be reliable; the data in this product description are factory standard values. Contents, product performance improvements and specifications are subject to change without notice.
- Some performance parameters of the product can be specially adjusted according to customer requirements; please contact our marketing department.
- Our silicone products are developed for general electronics industry applications. For other uses, testing must be carried out and compliance confirmed in accordance with relevant legal requirements before use.