Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Polymer Name
- Plastics & Elastomers Functions
- Technologies
Features & Benefits
- Materials Features
- Ready-to-Use Product Features
- Special Features
- Condensation-curing
- Low viscosity
- Two-component
Applications & Uses
- Applications
- Cure Method
- Plastics & Elastomers End Uses
- Applications
Reproduction Molding
- Application Details
- Encapsulation of electrical and electronic components
- Making flexible molds for reproducing models with no or only minor undercuts in all common reproduction materials.
- Release coat for rigid molds for the casting or foaming of polyurethane resins.
Processing
- ELASTOSIL® RT K is cured by adding Catalyst T40 or T47
- The pot life is the period of time at 23 °C / 50% rel. humidity during which the catalyzed mix to attain a viscosity of 100000 mPa s and still be just pourable.
Properties
- Catalyst Properties
- Cured Properties
- Uncured Properties
- Properties
- Excellent flowability and good self-deaeration
- Medium Shore A hardness
- Good dielectric properties
- Outstanding resistance to casting resins, particularly polyurethanes.
- Note
Catalyzed properties are catalyzed with 4 wt % Catalyst T40, after 4 days at 23°C / 50 % rel. humidity.
| Value | Units | Test Method / Conditions | |
| Curing Time (2% T47, at 23°C) | 3 | hours | — |
| Curing Time (4% T 40, at 23°C) | 9 | hours | — |
| Dynamic Viscosity (at 23°C) | 9000 | mPa·s | ISO 3219 |
| Pot Life (at 23°C, % T 40) | 90 | minutes | DIN EN ISO 2555 |
| Pot Life (at 23°C, % T 47) | 30 | minutes | DIN EN ISO 2555 |
| Value | Units | Test Method / Conditions | |
| Density (in water, at 23°C) | 1.22 | g/cm³ | ISO 2781 |
| Elongation (at break) | 130 | % | ISO 37 |
| Linear Shrinkage (at 23°C, 2% T47) | 0.3 | % | — |
| Linear Shrinkage (at 23°C, 4% T40) | 0.7 | % | — |
| Shore Hardness A | 45 | — | ISO 868 |
| Tear Strength | min. 3 | N/mm | ASTM 624 B |
| Tensile Strength | 2 | N/mm² | ISO 37 |
| Value | Units | Test Method / Conditions | |
| Density (at 20°C) | approx. 1.22 | g/cm³ | DIN 53217 |
| Dynamic Viscosity (at 23°C) | 15000 | mPa·s | Brookfield |
Regulatory & Compliance
- Certifications & Compliance
Safety & Health
- Safety Note
- Being a condensation-curing silicone rubber, ELASTOSIL® RT K contains only constituents that over many years have proved to be neither toxic nor aggressive. Special handling precautions are therefore not required, i.e., only the general industrial hygiene regulations apply.
- Catalyst T40 and T47 contains a tetraorganotin compound, is flammable (flash point 38 °C) and may cause irritation in contact with the eyes and skin. Adequate protective measures are required.
Packaging & Availability
- Country Availability
- Regional Availability