Place of Origin:
China
Brand Name:
CHENGUANG FSP
Certification:
ISO / SGS
Model Number:
R-890
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Silicone Encapsulant
Two Component Transparent Elastomer Silicone Encapsulant Applying to Potting and Sealing
Description
Characteristics:
Typical Properties
| Properties | Test Method | Unit | Value | |||
| Uncured | Componet | A | B | |||
| Appearance | Visual |
Transparent Liquid
|
Transparent | |||
| Specific gravity, 23℃ | GB/T 1033.1-2008 | g/cm3 | 0.98 | 0.98 | ||
| Viscosity,after stirred at 23℃ | GB/T 2794-1995 | mPa.s | 500-800 | 500-800 | ||
| Mixing ratio | A:B | 1:1 | ||||
| Pot life, 25℃ | h | 1 | ||||
| Cured | Penetration | GB/T 269-1991 | 200-300 | |||
| Dielectric strength | GB/T 1408.1-2006 |
MV/m
|
≥15 | |||
| Dielectric constant, 1MHz |
GB/T 1693-2007
|
≤2.8 | ||||
| Volume resistivity | GB/T 1410-2006 | Ω.cm | ≥1.0×1013 | |||
These figures are only intended as a guide and should not be used in preparing specifications.
How to use
1. Weight: According to 1:1 weight ratio to take A and B components.
2. Mixing: It is better to use specialized equipment for fully mixing, such as small planetary mixer. Pay attention to scratch bottom and wall of container when stir by manual operation.
3. Pouring: Pour the mixed rubber into encapsulating site. Settle stilly 8～10hours to let it cure at room temperature naturally. Heat can accelerate curing.
4. Deaeration: Fast curing when necessary, should guarantee no air bubbles in the curing rubber(The mixed rubber settle stilly 10-30 minutes at room temperature is OK). Or place the mixture together with its container should in vacuum degassing tank to be degassed. The mixture surface location will rise to 3~4 times higher than original and automatically break bubbles to collapse. Please hold vacuum status more 4~6 minutes, then release.
Packing, Storage & Shipping
R-890 A/B is supplied in 2×20Kg plastic drum, net weight.
R-890 A/B has a shelf life of 6 months at least if stored in the sealed original container between 0℃ to 30℃.
Storage time beyond the specified data does not mean that the product is no longer usable. In which case, the properties required for the intended use must be checked for quality assurance reasons.
There is no shipping limitation for R-890.
Compatibility
Certain materials, chemicals, curing agents and plasticizers can inhibit the cure of R-890. Most notable of these include:
- Compounds such as organotin and other organometallic compounds
- Silicone rubber that contains an organotin catalyst
- Materials that contain sulfur, polysulfides, polysulfones, or other sulfur-based compounds
- Materials that contain amines, urethanes, or other amine-based compounds
- Plasticizers that contain unsaturated hydrocarbons
- Certain residues from solder flux
If a substrate or material is questionable with respect to potentially causing inhibition of cure, it is recommended that a small scale compatibility test be run to ascertain suitability in a given application. The presence of liquid or uncured product at the interface between the questionable substrate and the cured gel indicates incompatibility and inhibition of cure.
Attention
Although the data presented in this leaflet align with our current knowledge, the user must still inspect all supplies upon receipt. We reserve the right to modify product specifications based on technological advancements or new developments. Due to the uncontrollable processing conditions, particularly when incorporating raw materials from other companies, it is recommended to conduct preliminary trials to verify the suggestions provided in this leaflet. These recommendations do not exempt the user from investigating the possibility of infringing on third-party rights and, if necessary, clarifying their position. The recommendations for product use do not imply any warranty, whether expressed or implied, regarding the fitness or suitability of the product for a specific purpose.
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