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
- Compatible Polymers & Resins
- Cure Method
- Plastics & Elastomers End Uses
- Applications
- Making cost effective molds, specially suited for casting PE and PU resins.
- Reproduction Molding for Foundry, Arts and Handicrafts.
- Application Details
- ELASTOSIL® M 4511 is a high-performance mold making compound, which is particularly suitable for the reproduction of models with extensive undercuts. ELASTOSIL® M 4511 is especially suitable for the Processing of polyester and polyurethane resins.
- Due to its very high extensibility and low flexural modulus, ELASTOSIL® M 4511 is best suited for the reproduction of fine or fragile models, where the piece may be damaged by more rigid molding materials on demolding.
- ELASTOSIL® M 4511 exhibits low hardness and high strength, plus excellent ink transfer characteristics. These make it a perfect base material for the production of printing pads.
Processing
- If molds for processing epoxy or polyurethane resins are to be made, ELASTOSIL M 4511 is cured by adding 5 wt% Catalyst T 21. For molds used to process other reproduction materials such as polyester resins, plaster, concrete, synthetic stone, wax or low-melting alloys, 5 wt% Catalyst T 51 should be used.
- Pot lifes and curing times of both catalysts may be accelerated, and thus adjusted to suit the individual application by blending with Catalyst T 47.
- For faster curing either catalyst may be blended with Catalyst T 47. E.g. at a ratio of 95:5 (T51:T47) the pot life decreases to about 30 min, and the mold needs only about 4 h to cure.
- Further instructions on blending any catalyst with Catalyst T 47 may be found in our data-sheet: "WACKER® T-series catalysts".
- The pot life is the period of time at 23°C, 50% rel. humidity during which the catalyzed mix to attain a viscosity of 100,000 mPa s and still be just pourable.
Catalyst Paste T40
Pot Life, approx. [minutes]
Curing time (tack-free), approx.[h]
5% T21 60-90 8-10 5% T51 60-90 8-10
Properties
- Catalyst Properties
- Cured Properties
- Uncured Properties
- Properties
- Very good flowability and self-deaeration
- Very low Shore A hardness.
- High tear strength
- Extremely high elongation and flexibility
- Outstanding chemical resistance to attack by polyester and polyurethane resins, mold life is significantly extended.
- Note
Catalyzed with 5 wt% Catalyst T 51, after 4 days at 23°C, 50% relative humidity.
| Value | Units | Test Method / Conditions | |
| Dynamic Viscosity (at 23°C) | 20000 | mPa·s | ISO 3219 |
| Value | Units | Test Method / Conditions | |
| Density (in water, at 23°C) | 1.22 | g/cm³ | ISO 2781 |
| Elongation (at break) | 600 | % | ISO 37 |
| Linear Shrinkage | max. 0.4 | % | — |
| Shore Hardness A | 12 | — | ISO 868 |
| Tear Strength | min. 18 | N/mm | ASTM D 624 B |
| Tensile Strength | 3.5 | N/mm² | ISO 37 |
| Value | Units | Test Method / Conditions | |
| Density (at 23°C) | 1.22 | g/cm³ | — |
| Dynamic Viscosity (at 23°C, after stirring) | 25000 | mPa·s | DIN EN ISO 3219 |
Regulatory & Compliance
- Certifications & Compliance
Safety & Health
- Safety Note
- Being a condensation-curing silicone rubber, ELASTOSIL M 4511 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 21, T 51 and T 47 contain organotin compounds, are flammable (flash points 50 °C) and may cause irritation in contact with eyes and skin. Adequate protective measures are required.
Packaging & Availability
- Country Availability
- Regional Availability