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).

Details

HEAT CURED SILICONE RUBBER  HCR 360 U

Description： 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

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:  HCR 360 U is delivered in 20 kg carton boxes.

Storage and shelf life:  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,  no longer guarantees that the product meets the sales specifications.