Methods for protecting patinated surfaces of copper products and patinated copper product
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United States of America Patent
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Oct 18, 2011
Grant Date -
Jun 12, 2008
app pub date -
Nov 8, 2007
filing date -
Nov 9, 2006
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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.
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