Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Technologies
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Features & Benefits
- Labeling Claims
- Ready-to-Use Product Features
Applications & Uses
- Markets
- Applications
- Application Area
- Application Method
- Cure Method
- Applications
- Power Control Unit (PCU)
- Measurement & Control, Sensor Technology
- Automotive Electronics
- Power Electronics
- Electrics & Electronics
- Potting & Encapsulation with Soft Gels
- Connector Encapsulation
- Application Details
Processing
SEMICOSIL® 950 UV B is designed to be used in combination with SEMICOSIL ® 949 UV A . To ensure homogenity component A must be stirred thoroughly before processing.
- Surface preparation :
- All surfaces must be clean and free of contaminants that will inhibit the cure of the 10 : 1 mixture of SEMICOSIL® 949 UV A / SEMICOSIL® 950 UV B.
- Examples of inhibiting contaminants are sulfur containing materials, plasticizers, urethanes, amine containing materials and organometallic compounds – especially organotin compounds.
- If a substrate’s ability to inhibit cure is unknown, a small scale test should be run to determine compatibility.
- Handling :
- The A-component contains an UV-tracer that is dispersed in the silicone. In order to guarantee homogenous product performance (curing time, UV-tracability) it is recommended to homgenize the A-side prior to application by stirring.
- The A-component contains an UV-tracer that is dispersed in the silicone. In order to guarantee homogenous product performance (curing time, UV-tracability) it is recommended to homgenize the A-side prior to application by stirring.
- Mixing :
- SEMICOSIL® 950 UV B contains the platinum catalyst, component A the crosslinker. Even traces of the platinum catalyst may cause gelling of the component containing the crosslinker. Therefore tools (spatula, stirrers, etc.) used for handling the platinum-containing component or the catalyzed compound must not come into contact with this component.
- SEMICOSIL® 949 UV A should be thoroughly mixed with SEMICOSIL® 950 UV B at a 10 : 1 ratio by weight or volume.
- To eliminate any air introduced during dispensing or trapped under components or devices a vacuum encapsulation is recommended.
- Curing :
- For the curing an UV lamp (Fe-lamp, D-bulb) with an emission between 250 and 350 nm can be used. It is recommended not to use lamp systems that emit light with a wavelength below 250 nm.
- Curing time of SEMICOSIL® 949 UV A / SEMICOSIL® 950 UV B (10 : 1) is highly dependent on UV-activation. Significant differences in curing time are obtained for curing different layer thicknesses and for using different substrate materials.
- Typical values are given below.
- connector potting
- conformal coating for printed circuit boards
- encapsulation of electronic components
- Without UV-activation SEMICOSIL® 949 UV A / SEMICOSIL® 950 UV B cures at room temperature within 36 h, at 70°C within 20 min.
-
UV-activation
(140 mW/cm²)Curing time
at 25°C (2 mm)10 s 1 min 20 s cured after 40 s UV
- Surface preparation :
Properties
- Color
- Catalyst Properties
- Cured Properties
- Uncured Properties
- Properties
- Uv-active and shadow curing catalyst
- To be used as semicosil® 949 uv a / semicosil® 950 uv b in 10 : 1 mixing ratio
- Low viscosity
- Extremely fast curing at room temperature (after uv-activation)
- Shadow curing at room temperature
- Low hardness (shore 00)
- Applied mixture offers process control option by uv light (contains uv-tracer)
| Value | Units | Test Method / Conditions | |
| Dynamic Viscosity (A+B, at 23°C, Mix SEMICOSIL 949® UV A / SEMICOSIL 950® UV B 10:1) | 200 | mPa·s | DIN EN ISO 3219 |
| Gel Time (after UV irradiation, 140 mW/cm², 10 sec) | 0 - 6 | minutes | — |
| Gel Time (non irradiated, at 35°C, Measured in Gel Timer (Saur)) | 4 - 40 | minutes | — |
| Gel Time (non irradiated, at 70°C, Measured in Gel Timer (Saur)) | 1 - 8 | minutes | — |
| Mix Ratio (A+B, SEMICOSIL® 949 UV A: SEMICOSIL® 950 UV B) | 10:1 | parts by weight | — |
| Platinum Catalyst in Component (A+B, Organometallic Catalyst) | Component B | — | — |
| Pot Life (at 23°C) | approx. 10 | minutes | — |
| Value | Units | Test Method / Conditions | |
| Density (at 23.0°C) | 0.97 | g/cm³ | DIN EN ISO 1183-1 |
| Shore Hardness 00 (Curing Conditions: 10 sec, 140 mW/cm², followed by 30 min, 150°C; measured at 23°C) | 40 | — | ASTM 2240 |
| Value | Units | Test Method / Conditions | |
| Density (at 23°C, Componenet A) | 0.97 | g/cm³ | DIN EN ISO 2811-2 |
| Dynamic Viscosity (Component A, A:SEMICOSIL® 949 UV A; B: SEMICOSIL® 950 UV B) | 150 | mPa·s | ISO 3219 |
| Dynamic Viscosity (Component B, A:SEMICOSIL® 949 UV A; B: SEMICOSIL® 950 UV B) | 1000 | mPa·s | ISO 3219 |
Regulatory & Compliance
- Certifications & Compliance
- Chemical Inventories
- Quality Standards
Packaging & Availability
- Country Availability
- Regional Availability
Storage & Handling
- Storage Information
General recommendations SEMICOSIL® 950 UV B should be stored in the original light-tight container. After exposure to daylight or UV-light the material should be immediately processed and not stored any longer.