MOLYKOTE® HP-300 Grease protects critical electrical connections of the inverter
A reliable rubber-compatible grease with efficient thermal regulation that lubricates and seals O-rings
The application
Electric vehicles depend on AC/DC inverters to power the motor and other components. These batteries provide 500 volts of power and a maximum current of 500 amperes, so reliable inverter operation is critical to protect the life of the battery and the vehicle engine.
The challenge
Power cables with O-ring seals produced using various elastomers, including EPDM and silicone rubber, are used to connect the inverter and battery. O-rings are critical to prevent moisture from entering the inverter chamber. With operating temperatures reaching 120°C, high temperature performance and rubber-compatible lubrication are needed to protect O-rings from damage.
A vehicle manufacturer approached the MOLYKOTE® team for a solution that offered the necessary protection and performance of the O-ring, along with reliable rubber compatibility.
The solution
MOLYKOTE® HP-300 grease can protect the O-rings of an electrical connection even in harsh environments without changing the physical and mechanical properties of the seal. Offering excellent material compatibility and thermal stability, the grease is suitable for use with various elastomers such as EPDM and silicone rubbers.
The MOLYKOTE® technical team subjected MOLYKOTE® HP-300 grease to several tests to observe how the lubricant performed under pressure.
MOLYKOTE® HP-300 grease did not adversely affect the properties of the rubber, demonstrating excellent compatibility
The data convinced the automotive manufacturer that MOLYKOTE® HP-300 Grease was the right solution for its challenge.
Compatibility testing of EPDM elastomers
Samples were prepared according to ISO 527 and were aged for 250 hours under conditions of 85°C and room temperature.
Silicone rubber compatibility test
Samples were prepared according to ISO 527 and were aged for 250 hours under conditions of 85°C and room temperature.
Get outstanding performance in extreme conditions
MOLYKOTE® HP-300 grease can be widely used in harsh conditions, such as low or high temperatures; in corrosive environments; in the presence of solvents, and vacuum conditions; and more.
MOLYKOTE® HP-300 grease offers:
- Good compatibility with plastic and rubber
- Excellent stability at high temperatures
- Superior resistance to chemicals and solvents
- Minimal deterioration due to oxidation; suitable for long-term lubrication
- Low vapor pressure (base oil)
