Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Technologies
- Product Families
Features & Benefits
- Labeling Claims
- Ready-to-Use Product Features
- Specific Features
- Addition Curing
- Low ion content
- Low volatile
- Two-component
Applications & Uses
- Markets
- Applications
- Application Area
- Cure Method
- Applications
- Automotive Electronics
- Electrics & Electronics
- Potting & Encapsulation
- Power Electronics
- Application Details
Because of the thixotropic behavior, SEMICOSIL® 911 A/B is specially recommended for local encapsulation of delicate electronic components.
Processing
- Surface preparation : All surfaces must be clean and free of contaminants that will inhibit the cure of SEMICOSIL® 911 A/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.
- Mixing : Component A of SEMICOSIL® 911 A/B contains the platinum catalyst, component B 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. The two components should be thoroughly mixed at a 1 : 1 ratio by weight or volume. To eliminate any air introduced during mixing or trapped under components or devices a vacuum de-airing under a vacuum of 10 - 20 mm mercury for 5 - 10 min is recommended.
- Curing : Curing time of addition-curing silicone rubber is highly dependent on temperature, size and heat sink properties of the component being potted.
- Temperature Curing time
- 100°C - 5 min
- 130°C - 2 min
- Temperature Curing time
Properties
- Physical Form
- Catalyst Properties
- Cured Properties
- Uncured Properties
- Properties
- Two-part, 1 : 1 mixing ratio
- Thixotropic
- Rapid heat cure
- Forms a soft gel on vulcanization
- Low content of volatiles
- Low content of uncured polymer
- Almost constant properties between -40 °c and +180 °c
- Low ion content
- Note
Cured for 60 min at 150°C
| Value | Units | Test Method / Conditions | |
| Dynamic Viscosity (at 25°C, Shear rate 0.5 s⁻¹) | 8000 | mPa·s | DIN EN ISO 3219 |
| Dynamic Viscosity (at 25°C, Shear rate 100 s⁻¹) | 1600 | mPa·s | DIN EN ISO 3219 |
| Mix Ratio (A:B) | 1:1 | parts by weight | — |
| Platinum Catalyst in Component (A+B) | Component A | — | — |
| Pot Life (A+B, at 25°C) | 70 | minutes | — |
| Value | Units | Test Method / Conditions | |
| Density (at 23°C) | 0.99 | g/cm³ | DIN EN ISO 1183-1 A |
| Penetration (quarter cone, 9.38g, Cure: 150°C, 1h) | 6 | mm | DIN ISO 2137 |
| Value | Units | Test Method / Conditions | |
| Density (at 23°C, Componenet A) | 0.99 | g/cm³ | DIN 51757 |
| Density (at 23°C, Componenet B) | 0.99 | g/cm³ | DIN 51757 |
| Viscosity (at 25°C, Shear rate 0.5 s⁻¹, Component B) | 8000 | mPa·s | DIN EN ISO 3219 |
| Viscosity (at 25°C, Shear rate 0.5 s⁻¹) | 1600 | mPa·s | DIN EN ISO 3219 |
| Viscosity (at 25°C, Shear rate 0.5 s⁻¹) | 8000 | mPa·s | DIN EN ISO 3219 |
| Viscosity (at 25°C, Shear rate 100 s⁻¹, Component B) | 1600 | mPa·s | DIN EN ISO 3219 |
Regulatory & Compliance
- Certifications & Compliance
- Chemical Inventories
- Quality Standards
Safety & Health
- Safety Notes
According to the latest findings addition curing SEMICOSIL® 911 A/B silicone rubber contains neither toxic nor corrosive substances which might require special handling precautions. General hygiene regulations should be observed.
Packaging & Availability
- Country Availability
- Regional Availability