AQUEOUS INK FORMULATION CONTAINING METAL-BASED NANOPARTICLES FOR USAGE IN MICRO CONTACT PRINTING
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United States of America Patent
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Issued Date -
Nov 6, 2014
app pub date -
Sep 25, 2012
filing date -
Sep 30, 2011
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Abstract
The present invention relates to an aqueous formulation particularly for generating electrically conductive and/or reflective structures by microcontact printing, characterized in that the formulation contains at least a) ≧15 to ≦55 parts by weight water, b) ≧10 to ≦50 parts by weight alcohol, c) ≧15 to ≦45 parts by weight metal-based nanoparticles, d) 0.5 to ≦10 parts by weight non-fluorinated surfactant, and e) ≧0.5 to ≦10 parts by weight fluorinated surfactant, wherein the above defined constituents a) to e) summarize to a concentration of ≦100 parts by weight in the formulation. The wetting behavior especially of hydrophobic materials may significantly be improved. The present invention further relates to a method of generating structures, particularly being electrically conductive and/or reflective, on a substrate by microcontact printing and a substrate comprising such a structure.
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