Invention Grant
- Patent Title: Static dissipating coatings, electronic circuits comprising such coatings, and methods of forming such coatings and circuits
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Application No.: US17473488Application Date: 2021-09-13
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Publication No.: US12065585B2Publication Date: 2024-08-20
- Inventor: Patrick John Kinlen
- Applicant: The Boeing Company
- Applicant Address: US IL Chicago
- Assignee: The Boeing Company
- Current Assignee: The Boeing Company
- Current Assignee Address: US IL Chicago
- Agency: Jordan IP Law, LLC
- Main IPC: C09D5/24
- IPC: C09D5/24 ; C09D7/20 ; C09D7/48 ; C09D7/63 ; C09D179/02 ; H01B1/00 ; H01B1/12 ; H05K3/28 ; H05K9/00

Abstract:
Described herein are static dissipating coatings and thermally-stable static-controlled (TSSC) electronic circuits, comprising such coatings. Also described herein are methods of forming such coatings and circuits. In some examples, a static dissipating coating comprises a conductive polymer and a thermally-stable base polymer. The conductive polymer comprises polyaniline and, in some examples, a conductive agent, such as dinonylnaphthalene sulfonic acid (DNNSA), dodecyl benzene sulfonic acid (DBSA), and/or camphor sulfonic acid (CSA). The thermally-stable base polymer comprises one or more copolymers of butyl-methacrylate, such as poly-butylmethacrylate-co-methyl methacrylate (PBM). The amount of the conductive polymer is specifically controlled to ensure the coating's overall conductivity and thermal stability. In some examples, the conductive polymer concentration is at or less than 25% by weight. The conductivity of the coating is between 10−9 S/cm and 10−6 S/cm even after being exposed to 150° C. for up to 24 hours.
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