Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Technologies
- Product Families
Features & Benefits
- Ready-to-Use Product Features
Applications & Uses
- Markets
- Cure Method
- Application Details
Encapsulation of electronic components for the automotive and power electronics industries.
Processing
Surface preparation:
All surfaces must be clean and free of contaminants that will inhibit the cure of SEMICOSIL® 912. 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.
Mixing:
- SEMICOSIL® 912 contains the crosslinker, ELASTOSIL® CAT PT, PT-F and CAT UV contain the catalyst. Even traces of the platinum catalyst may cause gelling of the component containing the crosslinker. Therefore tools (spatula, stirrers, etc.) used for handling the catalyst-containing component or the catalyzed compound must not come into contact with this component.
- The two components should be thoroughly mixed 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:
- The system SEMICOSIL® 912 / ELASTOSIL® CAT UV (10:1) is activated by direct UV irradiation. UV irradiation should use emissions in the wavelength range between 250 and 350 nm. Typically D-bulbs (Fe-doped Hg-light sources) using ozone-free quartz should be used and are commercially available. H-bulbs with emissions below 250 nm are not recommended.
- Curing time of the UV-active system SEMICOSIL® 912 / ELASTOSIL® CAT UV (10:1) is highly dependent both on the intensity and dose of the UV light and the spectral intensity distribution.
- The curing is also dependent on the layer thickness, the optical properties of the substrate and temperature. Increase of the temperature will fasten curing reaction. SEMICOSIL® 912 / ELASTOSIL® CAT UV (10:1) will only cure in directly irradiated areas. Curing of SEMICOSIL® 912 catalyzed with ELASTOSIL® CAT PT or ELASTOSIL® CAT PT-F (10:1) is possible at ambient temperature (ca. 23°C) and is promoted by elevated temperature. For fast cure a vented oven can be used.
Over Temperature 100 °C Curing time, 2mm
Catalyst PT 30 min Catalyst PT-F 10 min Catalyst UV # 2 min # UV dose 1.5 J/cm², 250-350nm
Properties
- Physical Form
- Catalyst Properties
- Cured Properties
- Uncured Properties
- Properties
- Two-part, 10 : 1 mixing ratio
- Low viscosity
- Modular system allows flexible adjustment of pot life and curing time by selection among different catalysts (no lot binding between base and catalyst)
- Fast curing at room temperature with ELASTOSIL® CAT PT-F
- Long pot life at room temperature with ELASTOSIL® CAT PT
- Extremely fast curing with ELASTOSIL® CAT UV
- Low hardness
- Excellent tackiness
- Note
- Mixing ratio (SEMICOSIL® 912 : catalyst) = 10:1 for catalyzed properties A+B.
- Cured properties are catalyzed with ELASTOSIL® CAT PT; cured at 150°C for 30 min.
| Value | Units | Test Method / Conditions | |
| Dynamic Viscosity (A+B, at 25°C) | 1000 | mPa·s | ISO 3219 |
| Gel Time (A+B, catalyzed with ELASTOSIL® CAT PT-F, at 23°C) | 15 | minutes | DIN 16945 |
| Gel Time (A+B, catalyzed with ELASTOSIL® CAT PT, at 120°C) | max. 10 | minutes | DIN 16945 |
| Gel Time (A+B, catalyzed with ELASTOSIL® CAT PT, at 23°C) | 4 | hours | DIN 16945 |
| Gel Time (A+B, catalyzed with ELASTOSIL® CAT UV, at 120°C, without UV-irradiation) | min. 5000 | seconds | DIN 16945 |
| Gel Time (A+B, catalyzed with ELASTOSIL® CAT UV, at 25°C, UV dose: 1.5 J/cm²; 250-350 nm) | 60 - 1000 | seconds | — |
| Pot Life (A+B, at 23°C, catalyzed with ELASTOSIL® CAT PT-F) | 5 | minutes | DIN EN ISO 3219 |
| Pot Life (A+B, at 23°C, catalyzed with ELASTOSIL® CAT PT) | max. 2 | hours | DIN EN ISO 3219 |
| Pot Life (A+B, at 23°C, catalyzed with ELASTOSIL® CAT UV ( UV dose: 1.5 J/cm²; 250-350 nm; until 300.000 mPas)) | 300 - 1000 | seconds | DIN EN ISO 3219 |
| Pot Life (A+B, at 23°C, catalyzed with ELASTOSIL® CAT UV ( UV dose: 1.5 J/cm²; 250-350 nm)) | 60 - 280 | seconds | DIN EN ISO 3219 |
| Pot Life (A+B, at 23°C, catalyzed with ELASTOSIL® CAT UV, without UV-irradiation) | min. 3 | days | DIN EN ISO 3219 |
| Value | Units | Test Method / Conditions | |
| Density (at 23°C) | 0.97 | g/cm³ | ISO 1183-1 A |
| Penetration (9.38g hollow cone, 5 sec) | 6 | mm | DIN ISO 2137 |
| Value | Units | Test Method / Conditions | |
| Density (at 23°C) | 0.97 | g/cm³ | DIN EN ISO 2811-1 |
| Dynamic Viscosity (at 25°C, without catalyst) | 1000 | mPa·s | ISO 3219 |
Regulatory & Compliance
- Certifications & Compliance
Safety & Health
- Safety Note
According to the latest findings, SEMICOSIL® 912 contains neither toxic nor aggressive substances which might require special handling precautions. General industrial hygiene regulations should be observed.
Packaging & Availability
- Country Availability
- Regional Availability
Storage & Handling
- Storage Information
SEMICOSIL® 912 should be stored dry and cool in the tightly closed original container.