Patent ID: 11944997
Assignee: SHIMANO INC.
Field: Surface technology, coating (Chemistry)
Classification: CPC B  C | IPC B  C

Claim 0:
1. A surface decoration structure including an undercoat film, a silver mirror film layer, and a topcoat film formed on a surface of a substrate, wherein
the silver mirror film layer includes silver nanoparticles and a polymer dispersing agent,
the silver nanoparticles are stacked with the polymer dispersing agent adhering to outer surfaces of the silver nanoparticles, and
the silver mirror film layer is formed in a state in which the polymer dispersing agent is reticulated three-dimensionally between the silver nanoparticles of the silver minor film layer,
the silver mirror film layer is formed from a composition liquid comprising the silver nanoparticles, the polymer dispersing agent, and a silver minor film solvent,
the silver mirror film solvent is a volatile solvent,
the silver nanoparticles are homogeneously dispersed in the silver mirror film solvent with the polymer dispersing agent attached around the silver nanoparticles in the silver mirror film layer application process,
the topcoat film and the undercoat film are formed from a composition including, as a solvent, at least one member selected from the group consisting of an aliphatic hydrocarbon compound solution including 10% by mass or less of an aromatic compound, an aliphatic compound including no aromatic compound, and diisobutyl ketone,
the topcoat film and the undercoat film include a resin film containing a polar group, a benzotriazole compound as an ultraviolet absorber to constitute 1.0-10 wt % for mass of the topcoat film and the undercoat film, respectively, and a hindered amine as a light stabilizer to constitute 0.5-4.0 wt % for mass of the topcoat film and the undercoat film, respectively, and the topcoat film, the undercoat film, and/or the silver mirror film layer includes a triazole compound other than the benzotriazole compound, as a corrosion inhibitor to constitute 2-10 wt % for mass of the topcoat film, the undercoat film, and/or the silver mirror film layer, respectively, wherein the polar group includes an OH group or an NH2 group, a resin in the undercoat film and the topcoat film is selected from the group consisting of a silicone resin film and an acrylic silicone resin film, and the topcoat film contains the same resin as the undercoat film.