Delivery Time:10 business days
Certification:ROHS

SH 502 U A/B Flame Retardant Custom Silicone Rubber Parts with UL 94-V0

Flame retardant silicone rubber productswith the properties of good flexibility and anti-compression deformation, heat, pressure, abrasion, impact resistance, tensile strength, tear resistance, flame, shock absorption, cold, anti-aging.In line with ROHS standard, halogen-free , fire-retardant to UL 94-V0.

The flame retardant feature of this tock suggests its use for any molded parts of the electric, automotive, vessel and aircraft areas.

Dow Corning SH 502 U A/B

Dow Corning Toray Silicone SH 502 U A/B Stockis a high performance flame retardant silicone rubber stock which is recognized as UL 94 V-0.

The part, which requires flame retardancy as well as extreme high and low temperature resistances such as the parts of television set, will be produced by using Dow Corning Toray Silicone SH 502 U A/B Silicone Rubber.

1.1.1          CHARACTREISTICS

       * Flame Retardancy              :      UL 94 V-0 recognition

       * Molding Characteristics      :      Any complicated parts are easily molded

       * Electrical Properties           :      Good insulating characteristics are provided

1.1.2          USES

The flame retardant feature of this tock suggests its use for any molded parts of the electric, automotive, vessel and aircraft areas.

1.1.3          TYPICAL PROPERTIES

Table 1 shows typical properties of SH 502 U A/B. These values are not intended for use in preparing specifications.

Table 1. TYPICAL PROPERTIES OF SH 502 U A/B

Property                                      Property

Plasticity, Williams            250             Tear Strength, kgf/cm(JIS-B)              23

Specific Gravity at 25℃       1.37            Linear Shrinkage, %                    2.8

Durometer Hardness, ShA     53               Dielectric Strength, KV/mm         28

Tensile Strength, kg/cm2           74               Volume Resistivity, ohm-cm      5´1015

Elongation, %                   530             Dielectric Constant                   2.92

Dissipation Factor                 0.004

Recommended Curing Condition

Mixing Ratio             SH 502 U A/B 100 phr

                                    RC-4 50p       0.5 phr

         Press Cure             170℃/10 mins

         Oven Cure             200℃/4 hours ( Post cure)

Heat Resistance Changes of physical properties after heat aging are shown in Table 3.

Table 3. TEST RESULT OF HEAT AGING
Property	200℃, 72 hours	250℃, 72 hours
Hardness, points change	+ 4	+ 5
Tensile Strength, percent change	- 4	- 14
Elongation, percent change	- 18	- 53

Resistance To Hot Oils: Physical property change after oil immersion, shown in Table 4.

Table 4. TEST RESULT OF Oil Resistance
Property	ASTM No.1 oil 150℃, 72 hours	ASTM No.3 oil 150℃, 72 hours
Hardness, points change	- 3	- 26
Tensile Strength, percent change	- 12	- 70
Elongation, percent change	- 8	- 44
Volume Change, %	+ 5.3	+ 45

HOW