Document 3JmMNBMoO3eYEy3Jb3MG6wBO3

MOLYKOTE HP-300 Grease protects critical inverter electrical connections Case study: With reliable rubber compatibility and thermal regulation, grease lubricates and seals O-rings The application Electric vehicles depend on AC/DC power inverters to change the direct current (DC) electrical output from the vehicle's battery into alternating current (AC) to power the engine and other components. These batteries supply 500 volts of power and a maximum current of 500 amps, so reliable inverter operation is key to protecting battery life and the vehicle's motor. The challenge Power cables with O-ring seals made from various rubbers - including EPDM or silicone rubber - are used to connect the inverter and battery. The O-rings are critical to helping prevent moisture from entering the inverter chamber. With working temperatures reaching up to 120C, wide-temperature performance and proper rubbercompatible lubrication is required to protect the O-rings from damage. A vehicle manufacturer in China approached the MOLYKOTE team for a solution that would deliver needed O-ring protection and performance, along with dependable rubber compatibility. The solution MOLYKOTE HP-300 Grease can protect electrical connection O-rings in demanding environments, with minimal hardening or changes to mechanical properties. Delivering excellent rubber compatibility, performance and thermal stability, the grease is suitable for use with various rubbers, such as EPDM elastomers and silicone rubbers. Using both EPDM elastomers and silicone rubbers, the MOLYKOTE technical team subjected MOLYKOTE HP-300 Grease to several tests to observe how the lubricant performed under pressure, successfully demonstrating the grease's performance via lab comparisons with a traditional lubricant solution as a control. MOLYKOTE HP-300 Grease did not negatively affect the mechanical properties of the rubber O-rings, and it showed excellent compatibility. The data convinced the automotive manufacturer that MOLYKOTE HP-300 Grease was the right solution for its challenge. EPDM elastomer compatibility tests Specimens were prepared according to ISO 527 and were aged for 250 hours under 85C and room temperature conditions. Hardness, Shore A Stress and strain test results, Mpa M50 and M100 test results, Mpa 70 60 50 40 30 20 10 0 MOLYKOTE HP-300 Grease, 85C Control, 85C Hardness Stress at break MOLYKOTE HP-300 Grease, room temp Strain at break 3 2.5 2 1.5 1 0.5 0 Control, room temp M50 M100 A4_MOLYKOTE_HP-300_Grease_Case_Study_02-1021-01-AGP0922_16984.indd 1 3/16/23 11:11 AM Silicone rubber compatibility tests Specimens were prepared according to ISO 527 and were aged for 250 hours under 85C and room temperature conditions. 70 3 Hardness, Shore A Stress and strain test results, Mpa M50 and M100 test results, Mpa 60 2.5 50 2 40 1.5 30 1 20 10 0.5 0 MOLYKOTE HP-300 Grease, 85C Control, 85C Hardness Stress at break MOLYKOTE HP-300 Grease, room temp 0 Control, room temp Strain at break M50 M100 Get extraordinary performance in extreme conditions MOLYKOTE HP-300 Grease can be used broadly under harsh conditions, such as at low or high temperatures; in corrosive environments; in the presence of solvents, liquefied natural gasses and high-vacuum conditions; and more. It has been used in specialized applications where the volatilization of the lubricating material is undesirable, such as on cleanroom equipment and semiconductor manufacturing equipment. MOLYKOTE HP-300 Grease delivers: Good plastic and rubber compatibility Excellent stability at high temperatures Superior resistance to chemicals and solvents Minimal deterioration due to oxidation; appropriate for long-term lubrication Low vapor pressure (base oil) Typical properties of MOLYKOTE HP-300 Grease Specification writers: These values are not intended for use in preparing specifications. Please contact your local MOLYKOTE sales representative prior to writing specifications on this product. Standard(1) JIS K 2220 MIL-S-8660 MIL-S-8660 MIL-S-8660 ASTM D2596 ASTM D2266 JIS K 2220 JIS K 2220 Property Appearance Penetration (worked 60 times) NLGI class Service temperature range Density Bleed (200C, 24 hr) Evaporation (200C, 24 hr) Evaporation (200C, 1,000 hr) Four-ball weld load (1,500 rpm/1 min) Four-ball wear scar (1,200 rpm, 392 N, 1 hr) Low-temperature torque test (-20C) Starting torque Running torque Low-temperature torque test (-40C) Starting torque Running torque Base oil vapor pressure (20C) Result White 280 mm/10 2 -65 to 250C 2.0 g/cm3 8.0% 0.2% 1.0% 3,300 N 1.1 mm 4.1 Ncm 1.8 Ncm 11 Ncm 3.6 Ncm 4x10-10 Pa (1)JIS: Japanese Industrial Standard. MIL: Military Specification and Standards. ASTM: American Society for Testing and Materials. About MOLYKOTE Specialty Lubricants For more than 70 years, customers around the world have trusted the MOLYKOTE brand for performance and expertise to solve or prevent virtually any lubrication problem and to save energy. Available through a global network of more than 3,000 channel partners, MOLYKOTE brand lubricants - which include well over 500 anti-friction coatings, compounds, dispersions, greases, oils and fluids, and pastes - serve the automotive market and industrial/maintenance, repair and overhaul (MRO) markets. To learn more about our extensive product and service offering or to locate a distributor, visit molykote.com. Contact us MOLYKOTE has Contact Centers around the globe. Find the phone number for the center nearest you at www.dupont.com/molykotecontact. DuPontTM, the DuPont Oval Logo, and all trademarks and service marks denoted with TM, SM or are owned by affiliates of DuPont de Nemours, Inc. unless otherwise noted. 2021-2022 DuPont. The information set forth herein is furnished free of charge and is based on technical data that DuPont believes to be reliable and falls within the normal range of properties. It is intended for use by persons having technical skill, at their own discretion and risk. This data should not be used to establish specification limits nor used alone as the basis of design. Handling precaution information is given with the understanding that those using it will satisfy themselves that their particular conditions of use present no health or safety hazards. Since conditions of product use and disposal are outside our control, we make no warranties, express or implied, and assume no liability in connection with any use of this information. As with any product, evaluation under end use conditions prior to specification is essential. Nothing herein is to be taken as a license to operate or a recommendation to infringe on patents. Form No. 02-1021-01-AGP0922 #16984 A4_MOLYKOTE_HP-300_Grease_Case_Study_02-1021-01-AGP0922_16984.indd 2 3/16/23 11:11 AM