| Raw Material: | Synthetic Rubber |
|---|---|
| Material: | Silicone Rubber |
| Appearance: | Solidity |
| Form: | Solidity |
| Type: | Vmq |
| Density at 25 C, g/cm3, Approx: | 1.22 |
| Samples: |
|---|
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Audited Supplier HEAT CURED SILICONE RUBBER IOTA HCR 1970 U
Description: IOTA HCR 1970 U is a silicone master-batch, heat curing after the addition of a vulcanizing agent (chosen according to the processing method).
Applications: IOTA HCR 1970 U is recommended for moulding, has good compromise of mechanical properties.
Special properties:
Good mechanical properties;
Good appearance, anti-yellowing;
Good heat stability, up to 200°C;
Not easy to structured after long-term storage;
No post curing or slight post curing;
Wide possibilities for blending with other master batch.
Characteristics
Type (in accordance with GB/T 5576-1997) .................. VMQ
Density at 25°C, g/cm3, approx...........................… 1.22
Natural color....................................… translucent
Properties after working:
1) After addition of 1.25% Di(2,4-dichlorobenzoyl) peroxide (at 50%), and vulcanization for 8 minutes at 115ºC
2) After addition of 1.1% 2,5-dimethyl-2,5-di(tert-butylperoxy)hexan- (at 45%), and vulcanization for 5 minutes at 175ºC
1.Mechanical property:
1.1 Properties without post-cure 1) 2)
Shore A hardness, approx..............................… 69 69
Tensile strength, MPa, approx...........................… 7.3 8.4
Elongation at break, %, approx............................ 372 399
Modulus at 100% elongation, MPa, approx...............…. 2.64 2.68
Tear strength, (ASTM D 624 Die B) kN/m, approx.........… 19 19
Rebound resilience, %, approx........................… 43 42
Linear shrinkage, %, approx...........................… 1.5 3.2
1.2Properties after post-cure for 4 hours at 200°C
Shore A hardness, approx...........................… 71 73
Tensile strength, MPa, approx.......................... 8.2 8.8
Elongation at break, %, approx........................ 326 358
Modulus at 100% elongation, MPa, approx............... 3.00 2.93
Tear strength (ASTM D 624 Die B),kN/m, approx......… 16 17
Compression set , (22 h/177ºC/25%) %, approx......... - 27
Rebound resilience, %, approx........................ 40 42
Linear shrinkage, %, approx........................... 2.1 3.8
2. Thermal stability
Properties after post-cure for 3 days at 225°C
Shore A hardness, approx...........................… 74 76
Tensile strength, MPa, approx.......................... 6.4 6.1
Elongation at break, %, approx........................… 11 204
Packaging: IOTA HCR 1970 U is delivered in 20 kg carton boxes.
Storage and shelf life: IOTA HCR 1970 U may be stored in its original unopened packaging at a temperature below 40°C for up to 12 months from the date of manufacture marked clearly on the packaging.
Past this date, IOTA no longer guarantees that the product meets the sales specifications.
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