IRP rubber mixes
IRP rubber mixes are based on siloxane rubbers and are produced in the following grades: IRP-1338, IRP-1354, IRP-1399, IRP-1399“B”, IRP-1400, IRP-1401. IRP rubber mixes are used for manufacture of heat and frost resistant rubber products, that can perform in the temperature range from -50 °C to +200 °C (short-term +250 °C). For IRP-1354 rubber mix, working temperature range is from -70 °С to +200 °С. Grades IRP-1338, IRP-1354, IRP-1399, IRP-1400, IRP-1401 are designed for fixed connections, insulating and other parts operating in an unstressed state, in air with high ozone content and in electric field conditions. The main advantage of IRP family silicone mixes over rubber mixes based on other types of rubber is that products based on them retain performance in a wide temperature range from -50°C (some from -70°C) to +250°C.
With temperature increase or decrease, the physical and mechanical characteristics of the mixes remain practically unchanged. Also, products based on these mixtures can work for a long time in ozone, solar radiation (which is especially important in the manufacture of rubber goods for aviation equipment) and electric field environments. Products made of IRP silicone mixes have sufficiently high strength while ensuring good elasticity. Therefore, each rubber mix grade will have some distinctive feature. In particular, different grades differ significantly in hardness and resistance to aggressive environments. Among the properties inherent in products based on IRP rubbers, the following can also be distinguished: high durability of products, excellent electrical insulating properties, performance in any climatic zones. Another important feature is the absence of dangerous and harmful compounds (in particular, halogen-containing compounds) in the combustion products of items made from the silicone rubber mixes.
IRP rubber mixes are used for manufacture of heat and frost resistant rubber products, that can perform in the temperature range from -50 °C to +200 °C (short-term +250 °C) For IRP-1354 rubber mix, working temperature range is from -70 °С to +200 °С.
Grades IRP-1338, IRP-1354, IRP-1399, IRP-1400, IRP-1401 are designed for fixed connections, insulating and other parts operating in an unstressed state, in air with high ozone content and in electric field conditions.
Specification 38.103372-77
Technical characteristics
Parameters |
IRP-1338 |
IRP-1399 |
IRP-1400 |
IRP-1401 |
IRP-1354 |
IRP-1399 “B” |
Plasticity, within the range of |
0.35-0.60 |
0.40-0.60 |
0.30-0.55 |
— |
— |
|
Nominal tensile strength, MPa, minimum |
6.4 |
4.9 |
5.1 |
6.4 |
5.4 |
5.0 |
Elongation at break, %, minimum |
300 |
200 |
240 |
200 |
250 |
150 |
Relative residual deformation after breaking, %, maximum |
10 |
8 |
10 |
— |
||
Tear strength, kN/m, minimum |
14.7 |
9.8 |
— |
|||
Shore A hardness, units, within the range of or minimum |
55-70 |
60-75 |
65-80 |
50-65 |
65 |
|
Frost resistance factor for elastic recovery after compression |
|
|
|
|
— |
|
at -50°C, not less than |
0.45 |
0.50 |
0.45 |
— |
— |
|
at -70°C, not less than |
— |
— |
— |
0.30 |
|
|
Relative residual deformation after 20% compression in air at +200 °C for 24 hours, %, maximum |
55 |
35 |
34 |
40 |
50 |
40 |
Dielectric strength at 20°C at 50 Hz, kV/mm, minimum |
— |
20 |
— |
|||
Volume resistivity, Ohm·cm at 20°С |
— |
1*1014 |
— |
Packing:
In the form of up to 10 kg pieces. The pieces are wrapped in polyethylene film and placed in a polyethylene bag. Then polyethylene bag with rubber mix is packed in synthetic fabric bags. Net weight of one bag is not more than 30 kg.
Guaranteed shelf life:
2 months
Guarantee:
The product is manufactured according to the Specification. The product meets the stated information within the shelf life and subject to storage conditions.