Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Polymer Name
- Technologies
- Product Families
Features & Benefits
- Labeling Claims
Applications & Uses
- Cure Method
- Plastics & Elastomers Processing Methods
- Application Details
ELASTOSIL® R plus 4305/70 US is intended for fabrication of extruded articles that afford high transparency and very good tear resistance values.
Processing
- ELASTOSIL® R plus 4305/70 US may not be cured with peroxides, only with the catalyst batch ELASTOSIL® AUX PT1.
- ELASTOSIL® R plus 4305/70 US and Curing Agent PT 1 are mixed homogeneously on a roll mill in a ratio of 100 : 1.5. Care must be taken to keep the mill and compound as cool as possible during mixing.
- The temperature of the rubber should not exceed 35°C or risk partial curing and reduced pot life. Crosslinking begins when Curing Agent PT 1 has been added. The rate and degree of crosslinking depends on the storage time and temperature.
- At 23°C, the mixture has a pot life of about 24 hours. This can be extended by storing the catalyzed mixture at a lower temperature.
Properties
- Typical Properties
- Cured Properties
- Note
Cured properties are obtained after mixing ELASTOSIL® plus 4305/70 and Curing Agent PT 1 in a ratio of 100: 1.5; press cured 15 min/165°C in vented air.
| Value | Units | Test Method / Conditions | |
| Pot Life (at 23°C) | 24 | Hours | — |
| Value | Units | Test Method / Conditions | |
| Compression Set (at 22 hours, 175°C) | 20 | % | DIN ISO 815-B |
| Elongation (at break) | 650 | % | ASTM D 412 |
| Pot Life | 24 | hours | WSTM 2299 |
| Shore Hardness A | 70 | — | ASTM D 2240 |
| Specific Gravity (at 25°C) | 1.17 | g/cm³ | DIN EN ISO 1183-1 A |
| Tear Strength | 262 | ppi | — |
| Tear Strength | 46 | kN/m | — |
| Tensile Strength | 1376 | psi | — |
| Tensile Strength | 9.5 | mPa | — |
Regulatory & Compliance
- Certifications & Compliance
- Chemical Inventories
- Compliance
Properly postcured vulcanizates of ELASTOSIL® R plus 4305/70 US comply with BfR and FDA food contact regulations. The material also passes USP XXIII Class VI.
Packaging & Availability
- Country Availability
- Regional Availability