Knowde Enhanced TDS
Identification & Functionality
- Additives Included
- Chemical Family
- Polymer Name
- Technologies
- Product Families
Features & Benefits
- Labeling Claims
- Materials Features
- Specific Features
- Addition Curing
- Food-contact
- Heat resistant
- High rebound resilience
- Two-component
- Ultra-low compression set
Applications & Uses
- Markets
- Applications
- Cure Method
- Plastics & Elastomers End Uses
- Applications
- Dairy Applications
- Household Applications
- Molded Parts
- Application Details
ELASTOSIL® R plus 4050/55 is suited for the manufacture of molded articles. Properly cured and post-cured vulcanizates of ELASTOSIL® R plus 4050/55 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 4050/55 is particularly suited for press-curing or processing on a silicone rubber injection molding machine.
- ELASTOSIL® R plus 4055 series may not be cured with peroxides but only with the platinum catalyst batch ELASTOSIL® AUX Batch PT 2.
- ELASTOSIL® R plus 4050/55 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 is approximately 24 h. This can be extended by storing the catalyzed mixture at lower temperature.
Properties
- Cured Properties
- Properties
Cured articles made of ELASTOSIL® R plus 4050/55 exhibit an excellent heat stability and good mechanical properties. Thanks to addition cure, the vulcanization reaction is significantly faster compared to peroxide curing materials. No peroxide decomposition products are formed during vulcanization. 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.
| Value | Units | Test Method / Conditions | |
| Compression Set (at 22 hours, 175°C) | 6 | % | DIN ISO 815-1 type B method A |
| Density | 1.13 | g/cm³ | DIN EN ISO 1183-1 A |
| Elongation (at break) | 400 | % | ISO 37 Type 1 |
| Rebound Resilience | 59 | % | ISO 4662 |
| Shore Hardness A | 58 | — | DIN ISO 48-4 |
| Tear Strength | 23 | N/mm | ASTM D 624 B |
| Tensile Strength | 8.4 | 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. Already opened boxes should be closed again to avoid any contamination.