Plasma-coated sealing element

US11371614B2 · kind B2 · utility

Assignee

• Carl Freudenberg KG · DE

Inventors

• Friederike von Fragstein · Heidelberg, DE
• Matthias Adler · Heppenheim, DE
• Stephan Rutz · Weinheim, DE
• Thomas Schnetz · Schwetzingen, DE
• Katharina Hallstein · Kröckelbach, DE
• Kai Feller · Bolanden, DE
• Boris Traber · Hirschberg, DE
• Erich Prem · Hemsbach, DE

Key dates

• Filing date: Apr 18, 2018
• Grant date: Jun 28, 2022
• Expiry date: Aug 11, 2038

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J7/123
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A method includes using a sealing element to dynamically seal a sealing body in the presence of a lubricant. The sealing element has an elastomeric base body and a plasma coating. The coating includes the elements carbon, oxygen, silicon, and hydrogen. The coating has the following properties at least at the surface: the amount ratio C:Si (at %/at %) is >5, the amount ratio O:Si (at %/at %) is >3, and the surface energy is <50 mN/m. In an embodiment, the coating includes the element fluorine.