Methods for protecting patinated surfaces of copper products...

Details Methods for protecting patinated surfaces of copper products... Methods for protecting patinated surfaces of copper products...

2007-11-08

2011-10-18

Vo, Hai (Department: 1788)

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Composite having voids in a component

C428S306600, C428S319300, C428S319700, C427S521000, C427S372200

Reexamination Certificate

active

08039097

ABSTRACT:
A method for the temporary protection of patinated surfaces of copper products, in which an aqueous polymer dispersion is applied to the patinated surface, so that the polymer dispersion penetrates regions of the porous patina that are close to the surface, and in which the aqueous polymer dispersion is subsequently dried, so that it forms a composite with the patina that is permeable to water vapor diffusion. The polymer dispersion binds loose dust located on prepatinated copper products and simplifies the handling of the copper products. It behaves in a hydrophobic manner, but on the other hand it permits the required access of air moisture and water to the patina layer for further weathering.

REFERENCES:
patent: 4190693 (1980-02-01), Martorano et al.
patent: 5756158 (1998-05-01), Pilz et al.
patent: 6176905 (2001-01-01), Priggemeyer et al.
patent: 2008/0171212 (2008-07-01), Shedlosky et al.
patent: WO 2005123275 (2005-12-01), None

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