MIL-PRF-23586F
TABLE II. Electrical properties of cured silicone rubber compounds.
Type I
Type II
Type III
Test
Test
Para.
Grade
Grade
Grade
A
B1 & B2
A
B1 & B2
A
B1 & B2
Dielectric strength
400
400
400
400
400
400
4.7.19
Volts/mil, minimum
Volume resistivity: 1/
OHM-CM, minimum at
4.7.20
2 x 1014
5 x 1013
1 x 1014
3 x 1013
1 x 1014
2 x 1014
23° ±1.1°C (73.4° ±2°F)
OHM-CM, minimum at
2 x 1012
5 x 1011
1 x 1013
5 x 1011
2 x 1012
2 x 1012
149° ±1.1°C (300° ±2°F)
Surface resistivity: 1/
OHM-CM, minimum at
4.7.20
2 x 1014
2 x 1014
2 x 1014
2 x 1014
2 x 1014
2 x 1014
23° ±1.1°C (73.4° ±2°F)
OHM-CM, minimum at
2 x 1014
2 x 1014
2 x 1014
2 x 1014
2 x 1014
2 x 1014
149° ±1.1°C (300° ±2°F)
Dielectric constant:
1 kilohertz, maximum
4.5
4.5
4.5
4.5
4.5
4.5
4.7.21
1 megahertz, maximum
4.5
4.5
4.5
4.5
4.5
4.5
Dissipation factor
1 kilohertz, maximum
0.020
0.020
0.020
0.020
0.020
0.020
4.7.21
1 megahertz, maximum
0.010
0.010
0.010
0.010
0.010
0.010
Arc resistance,
100
100
100
100
100
100
4.7.22
seconds, minimum
1/ Median values shall be recorded.
3.5 Instructions for use. The supplier of the sealing compound shall furnish with each
shipment, two copies of complete instructions for use which shall contain:
a. Storage procedures indicating optimum storage temperature and conditions of storage.
b. Types of catalyst, accelerators or other cure promoting agents including the proportions
and times required to give maximum cure. The proper mixing ratios of base compound
to curing agent shall be clearly stated.
c. Directions for application and drying of the primer.
d. Any safety precautions.
3.6 Workmanship. The compound shall be homogeneous and shall be free of grit, foreign
matter and lumps, and shall be so formulated as to meet all the requirements of this specification.
7
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