HEAT CURED SILICONE RUBBER IOTA HCR 160 U
Description：IOTA HCR
160 U is a
silicone master-batch, vulcanizing under heat after addition of a vulcanizing
agent (chosen according to the transformation procedure).
Applications：
General purpose extrusion material: profiles, gasket and
tubing.
Compression and injection moulding to manufacture high
transparent or bright colored parts featuring good mechanical properties.
Special properties：
No milling or quick milling after long storage
Easy processing in milling, extrusion and moulding
No post-cure or slight post-cure
High transparency
Good heat stability, up to 200℃
High level of filler acceptance
Bright colors easily obtained with Bluestar Silicones SC
color bases
Good mechanical and electrical properties
Blendable with other master-batches and additives.
Characteristics：
Type(in accordance with GB/T 5576/1997) ………………………………………… VMQ
Density at 25℃, g/cm3, approx………………………………………………………… 1.14
Natural color……………………………………………………………………
Transparent
Properties
after working:
(1) After addition of 1.25% 2,4-dichloro-benzoyl peroxide
(at 50%), and vulcanization for 8min at 115℃
(2) After addition of 1.0% 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane
at 45%, and vulcanization for 10 minutes at 170℃
1. Mechanical properties
1.1
Properties without post-cure
(1)
(2)
Shore A
hardness, approx………………………………. 59 56
Tensile
strength, MPa, approx……………………………… 9.7
11.2
Elongation
at break, %, approx…………………………… 400
520
Modulus at
100% elongatioin, MPa, approx ……………… 2.0 1.5
Tear
strength, kN/m, approx………………………………… 21 24
Compression
set (22h/177°C/25%), %, approx. …………
44 35
Rebound
resilience, %, approx………………………………… 54 46
1.2 Properties after post-cure for 4 hours at 200℃
Shore A
hardness, approx……………………………………. 62 61
Tensile
strength, MPa, approx………………………………… 11 11.5
Elongation
at break, %, approx…………………………… 385 445
Modulus at
100% elongatioin, MPa, approx …………… 2.2 1.9
Tear
strength, kN/m, approx…………………………………
21 23
Compression
set (22h/177℃/25%), %, approx……………
35 21
Rebound
resilience, %, approx………………………………… 53 50
2. Heat
stability
2.1
Properties after ageing 7 days at 177°C
Shore A hardness,
approx…………………………………… 65 65
Tensile
strength, MPa, approx………………………………… 10.7 11
Elongation
at break, %, approx………………………………… 350 380
Modulus at
100% elongation, MPa, approx………………… 2.5
2.3
Tear
strength, kN/m, approx……………………………………
19 19
Rebound
resilience, %, approx…………………………………
55 52
2.2
Properties after ageing 7 days at 200°C
Shore A
hardness, approx……………………………………
65 70
Tensile
strength, MPa, approx………………………………… 9.6
8.5
Elongation
at break, %, approx…………………………………
305 240
Modulus at
100% elongation, MPa, approx…………………… 2.9 3.4
Tear
strength, kN/m, approx……………………………………
14 13
Rebound
resilience, %, approx…………………………………
55 54
2.3
Properties after ageing 10 days at 200°C
Shore A
hardness, approx……………………………………
68 71
Tensile
strength, MPa, approx………………………………… 9.2
7.8
Elongation
at break, %, approx…………………………………
240 210
Modulus at
100% elongation, MPa, approx……………………
3.6 3.7
Tear
strength, kN/m, approx……………………………………
10 10
Rebound
resilience, %, approx…………………………………
57 57
3. Electrical properties
Dielectric
strength (on 1 mm thick slabs), kV/mm, approx……… 29
32
Dielectric
strength (on 2 mm thick slabs), kV/mm, approx……… 21 21
Dielectric
constant at 1 MHz, approx…………………………………
2.5 3.1
Dielectric
factor at 1 MHz, approx…………………………… 3.4×10-3 3.4×10-3
Volume
resistivity, Ohm.cm, approx………………………… 2.6×1015 3.2×1015
Packaging: IOTA HCR 160U is
delivered in 20 kg carton boxes.
Storage and shelf life: IOTA HCR 160U may be stored in its original unopened packaging at a
temperature below 40℃ for up to 18 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.
