The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 25, 2026
Filed:
Feb. 03, 2023
Lg Electronics Inc., Seoul, KR;
LG ELECTRONICS INC., Seoul, KR;
Abstract
The present disclosure relates to a complex coating film, and a fin and tube type heat exchanger and a microchannel type heat exchanger comprising the same. The complex coating film in the present disclosure comprises a metallic material; a first coating layer being formed on the metallic material; and a second coating layer being formed on the first coating layer, wherein the first coating layer comprises 10-40 wt % of a first hydrophilic resin, 1-20 wt % of a metal compound, 5-20 wt % of an amide-based cross linker, 1-15 wt % of a silane compound and water as a remaining component, and the second coating layer comprises 1-20 wt % of a second hydrophilic resin, 1-20 wt % of a silica particle, 0.01-5 wt % of a cross linker, 0.1-5 wt % of a solvent, and water as a remaining component, providing long-lasting corrosion resistance and hydrophilicity to the complex coating film.