Knowde Enhanced TDS
Identification & Functionality
- Additives Included
- Chemical Family
- Polymer Name
- Technologies
- Product Families
Features & Benefits
- Labeling Claims
- Materials Features
- Special Features
- Addition Curing
- Food-contact
- High tear-resistant
- Two-component
Applications & Uses
- Markets
- Applications
- Cure Method
- Plastics & Elastomers End Uses
- Applications
- Baby Care
- Dairy Applications
- Molded Parts
- Application Details
ELASTOSIL® R plus 4000/60 MH is particularly suited for the production of molded articles exhibiting high transparency and excellent tear resistance, e.g. diving masks.
Properly cured and post-cured vulcanizates of ELASTOSIL® R plus 4000/60 MH can be used for food contact applications and are suitable for use under the Recommendation "XV. Silicones" of the BfR and FDA 21 CFR 177.2600 "Rubber Articles Intended for Repeated Use" considering any given limitations on extractable and volatile substances.
Processing
- ELASTOSIL® R plus 4000 series may not be cured with peroxides but only with the platinum catalyst batch ELASTOSIL® AUX Batch PT 2. ELASTOSIL® R plus 4000/60 and ELASTOSIL® AUX Batch PT 2 are mixed homogeneously on a roll mill in a ratio of 100:1.5.
- A higher catalyst dosage results in a faster curing but a reduced pot life. Care must be taken to keep the compound cool during mixing. A homogeneous incorporation is a must, but the temperature of the rubber should not exceed 30 °C, otherwise there is a risk of scorch.
- The cross-linking reaction starts as soon as ELASTOSIL® AUX Batch PT 2 has been added. The rate and degree of crosslinking is dependent on storage time and temperature. At 23 °C the pot life exceeds 5 days. This can be extended by storing the catalyzed mixture at lower temperature.
Properties
- Cured Properties
- Properties
- ELASTOSIL® R plus 4000/60 MH is a fast curing silicone rubber exhibiting high elongation values and excellent tear resistance. Thanks to addition cure, the vulcanization reaction is significantly faster compared to peroxide curing materials. No peroxide decomposition products are formed during vulcanization.
- In order to obtain an intermediate hardness ELASTOSIL® R plus 4000/60 MH can be blended in any ratio with other grades of the ELASTOSIL® R plus 4000 series. In that case, the platinum catalyst batch ELASTOSIL® AUX Batch PT 2 should be added as the last component. At service temperatures above approx. 180 °C the addition of heat stabilizers is recommended.
- Note
Cure conditions: 1.5 % ELASTOSIL® AUX Batch PT 2, 15 min / 165 °C in press, post-cured 4 h / 200 °C for cureproperties.
| Value | Units | Test Method / Conditions | |
| Compression Set (at 22 hours, 175°C) | 23 | % | DIN ISO 815-1 type B method A |
| Density | 1.16 | g/cm³ | DIN EN ISO 1183-1 A |
| Elongation (at break) | 680 | % | ISO 37 Type 1 |
| Rebound Resilience | 52 | % | ISO 4662 |
| Shore Hardness A | 60 | — | DIN ISO 48-4 |
| Tear Strength | 50 | N/mm | ASTM D 624 B |
| Tensile Strength | 9.9 | N/mm² | ISO 37 Type 1 |
Regulatory & Compliance
- Certifications & Compliance
Packaging & Availability
- Country Availability
- Regional Availability
- Packaging Information
This product is available in 20 kg and 540 kg cardboard packaging.
Storage & Handling
- Storage Information
Please store the cardboard boxes in a dry and cool place. Once opened, cardboard boxes should always be resealed after use to prevent the platinum catalyst from being poisoned by amines, sulfur or phosphorus compounds.