Enhanced TDS
Knowde-enriched technical product data sheet
Identification & Functionality
- Chemical Family
- Polymer Name
- Product Type
- Plastics & Elastomers Functions
- Technologies
- Product Families
Features & Benefits
- Materials Features
- Ready-to-Use Product Features
- Special Features
- Condensation-curing
- Low viscosity
- Two-component
Applications & Uses
- Markets
- 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
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 - Cured Properties
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 - Uncured Properties
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 - 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.
Regulatory & Compliance
- Certifications & Compliance
- Chemical Inventories
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