HCR 2930 U is a silicone master-batch, heat curing after the addition of a vulcanizing agent (chosen according to the processing method).

Details

HEAT CURED SILICONE RUBBER  HCR 2930 U

Description:  HCR 2930 U is a silicone master-batch, heat curing after the addition of a vulcanizing agent (chosen according to the processing method).

Applications:  HCR 2930 U is recommended for buttons, O-rings, gaskets, seals, rubber rollers and other requirements of high resilience and low compression set products.

Special properties:
High resilience, low compression set;

Good appearance,anti-yellowing;

Good mechanical properties;

Easy processing, non-stick rollers, easy release;

Not easy to structured after long-term storage;

Good thermal stability;

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………………………………………………………… 1.07

Natural color……………………………………………………………………… translucent

Properties after working:

After addition of 1.1% 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane (at 45%), and vulcanization for 5 minutes at 175℃.

1.Mechanical property:

1.1 Without post-cure

Shore A hardness, approx…………………………………………………… 33

Tensile strength, MPa, approx……………………………………………… 4.8
Elongation at break, %, approx……………………………………………. 437
Modulus at 100% elongation, MPa, approx…………………………. 1
Tear strength, (ASTM D 624 Die B) kN/m, approx…………………. 9.2
Rebound resilience, %, approx……………………………………………… 66

1.2  Properties after post-cure for 4 hours at 200°C

Shore A hardness, approx………………………………………………… 32
Tensile strength, MPa, approx………………………………………….. 4.4
Elongation at break, %, approx………………………………………  412
Modulus at 100% elongation, MPa, approx…………………………  0.7
Tear strength (ASTM D 624 Die B)，kN/m, approx…………………  8.5
Compression set , (22 h/177℃/25%) %, approx……………………  6.19

Rebound resilience, %, approx………………………………………… 65

Packaging:  HCR 2930 U is delivered in 20 kg carton boxes.
Storage and shelf life:  HCR 2930 U may be stored in its original unopened packaging at a temperature below 40°C for up to 6 months from the date of manufacture marked clearly on the packaging.

Past this date,  no longer guarantees that the product meets the sales specifications.