Description: This series is a premixed compound of silicone rubber with goodphysical properties, good process-ability, vulcanizing under heat afteraddition of a vulcanizing agent that could be chosen according to processingrequirement.
Special properties:
Ø Excellent mechanical properties.
Ø Excellent appearance.
Ø Easy to process and demold, not sticky to rolls.
Ø Good stability up to 200℃.
Ø Slight replastification after prolonged storage.
Ø Wild range of reloading or blending.
Main applications:
Ø Molding article required good mechanical properties and appearance.
Characteristics:
Type (according to GB/T 5576-1997)................................VMQ
Naturalcolor...................................................................... translucent
Curing Condition:
After addition of 1.1% of 2,5-dimethyl-2-5-di(tert-butylperoxy)hexane (at 45%) and vulcanization for 10 min at 170°C.
Mechanical properties
Item | Testing Method | Unit | Technical Data |
SR430U | SR440U | SR450U | SR460U | SR470U |
Appearance | Visual Observation |
| Translucent | Translucent | Translucent | Translucent | Translucent |
Density | ASTM D792 | g/cm3 | 1.08 | 1.12 | 1.15 | 1.17 | 1.19 |
Hardness | ASTM D2240 | Shore A | 33 | 43 | 51 | 60 | 70 |
Tensile Strength | ASTM D412 | Mpa | 9.8 | 9.5 | 9.4 | 12.1 | 11.2 |
Elongation | ASTM D412 | % | 812 | 692 | 512 | 495 | 360 |
100% Modulus | ASTM D412 | Mpa | 0.62 | 0.84 | 1.17 | 1.85 | 3.11 |
Tear Strength | ASTM D624 Die B | N/mm | 15 | 19 | 21 | 22 | 27 |
Rebound | ASTM D395 Method B | % | 70.1 | 62.5 | 59.4 | 55.5 | 55.7 |




