HEAT CURED SILICONE RUBBER IOTA HCR 360 U
Description：IOTA HCR 360 U is a very transparent silicone Master-Batch, vulcanizing after heating following addition of a vulcanizing agent (chosen according to the transformation procedure).
Applications：Molding and extrusion of transparent parts with high mechanical properties.
Special properties：
Slight replastifying
Easy processability
Short post-curing
Very good tear resistance
High stability up to 200℃
Highly transparent
Large possibilities of blending with other master batches.
Bright colors easily obtained with SC color bases from IOTA
Characteristics：
Type(in accordance with GB/T 5576/1997) ………………………………………… VMQ
Density at 25℃, g/cm3, approx………………………………………………………… 1.16
Natural color…………………………………………………………Colorless, 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………………………………. 60 62
Tensile strength, MPa, approx……………………………… 9.1 10
Elongation at break, %, approx…………………………… 560 640
Modulus at 100% elongatioin, MPa, approx ………… 2.2 2.1
Tear strength, kN/m, approx……………………………… 38 39
Rebound resilience, %, approx…………………………… 45 45
Linear shrinkage, %, approx. ……………………………… 2.5 3.6
1.2 Properties after post-cure for 4 hours at 200℃
Shore A hardness, approx………………………………. 62 65
Tensile strength, MPa, approx…………………………… 9 10
Elongation at break, %, approx……………………… 430 510
Modulus at 100% elongatioin, MPa, approx ……… 2.6 3
Tear strength, kN/m, approx…………………………… 35 35
Compression set (22h/177℃/25%), %, approx……… 48 38
Rebound resilience, %, approx………………………… 47 48
Linear shrinkage, %, approx. …………………………… 3.4 4.3
2. Heat stability
2.1 Properties after ageing 7 days at 177°C
Shore A hardness, approx…………………………… 67 73
Tensile strength, MPa, approx………………………… 9 9.4
Elongation at break, %, approx………………………… 340 320
Tear strength, kN/m, approx………………………… 25 19
2.2 Properties after ageing 3 days at 200°C
Shore A hardness, approx…………………………… 69 73
Tensile strength, MPa, approx………………………… 8.8 8.2
Elongation at break, %, approx……………………… 300 280
2.3 Properties after ageing 7 days at 200°C
Shore A hardness, approx…………………………… 70 77
Tensile strength, MPa, approx………………………… 8.1 7.3
Elongation at break, %, approx……………………… 220 160
2.4 Properties after ageing 10 days at 200°C
Shore A hardness, approx…………………………… 74 79
Tensile strength, MPa, approx………………………… 7.2 7.5
Elongation at break, %, approx………………………… 170 130
Packaging: IOTA HCR 360 U is delivered in 20 kg carton boxes.
Storage and shelf life: IOTA HCR 360 U 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.
