Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Polymer Name
- Technologies
- Product Families
Features & Benefits
- Materials Features
- Special Features
- Condensation-curing
- Two-component
Applications & Uses
- Markets
- Cure Method
- Plastics & Elastomers End Uses
- Applications
- Elastomers for Pad Printing
- Making cost effective molds, especially suited for PE resin, wax or plaster castings.
- Reproduction Molding for Foundry, Arts and Handicrafts.
- Application Details
- Due to its good flow characteristics and its low modulus, ELASTOSIL® M 4400 is particularly suitable as a mold-making material for reproducing intricate structures, even if minor undercuts are involved.
- The good resistance to casting resins, especially polyester resins, enables large numbers of castings to be taken from one mold. Other materials, such as plaster or wax, may also be cast without any problems from molds made of ELASTOSIL® M 4400.
- Due to the low hardness of the cured rubber and its excellent ink transfer performance, ELASTOSIL® M 4400 is also highly suitable as a starting material for the production of printing pads.
Processing
- ELASTOSIL® M 4400 is cured by adding Catalyst T37 for long pot lives and curing times, or Catalyst T40 for short pot lives and curing times.
- The pot life is the period of time at 23°C, 50% relative humidity during which the catalyzed mix to attain a viscosity of 100,000 mPas and still be just pourable.
Catalyst Paste T40
Pot Life, approx. [minutes]
Curing time (tack-free), approx.[h]
3% T37 90 9 - 12 2% T40 40 5 - 7
Properties
- Catalyst Properties
- Cured Properties
- Uncured Properties
- Properties
- Good flowability and self-deaeration
- Low Shore A hardness
- Great extensibility and elasticity
- Very good resistance to casting resins, particularly polyester.
- Note
Catalyzed with 3 wt% Catalyst T 37, after 4 days at 23°C, 50% relative humidity for ctalyzed properties
| Value | Units | Test Method / Conditions | |
| Dynamic Viscosity (at 23°C) | 25000 | mPa·s | ISO 3219 |
| Value | Units | Test Method / Conditions | |
| Density (in water, at 23°C) | 1.3 | g/cm³ | ISO 2781 |
| Elongation (at break) | 250 | % | ISO 37 |
| Linear Shrinkage (2% T40) | 0.4 | % | — |
| Linear Shrinkage (3% T 37) | 0.7 | % | — |
| Shore Hardness A | 23 | — | ISO 868 |
| Tear Strength | min. 3 | N/mm | ASTM D 624 B |
| Tensile Strength | 2 | N/mm² | ISO 37 |
| Value | Units | Test Method / Conditions | |
| Density (at 20°C, 1013 hPa) | approx. 1.3 | g/cm³ | DIN 53217 |
| Dynamic Viscosity (at 23°C, after stirring) | 30000 | mPa·s | DIN EN ISO 3219 |
Regulatory & Compliance
- Certifications & Compliance
Safety & Health
- Safety Note
- Being a condensation-curing silicone rubber, ELASTOSIL® M 4400 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.
- Catalysts T 37 and T 40 contain a tetraorganotin compound, are flammable and may cause irritation in contact with the eyes and skin. Adequate protective measures are required.
Packaging & Availability
- Country Availability
- Regional Availability