Polyacrylamide surface modifiers for silver carboxylate nanoparticles
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United States of America Patent
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May 21, 2002
Grant Date -
Oct 18, 2001
app pub date -
Jan 18, 2001
filing date -
Feb 10, 2000
priority date (Note) -
Expired
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Abstract
There is disclosed a nanoparticulate dispersion of a silver carboxylate particles having on the surface of the particles a surface modifier which is a nonionic oligomeric surfactant based on vinyl polymer with an amido function. In particular, the surface modifier is acrylamide, methacrylamide or derivatives thereof. Also disclosed are various compositions including the dispersions including oxidation-reduction imaging forming compositions, thermographic elements and photothermographic compositions and elements. The preferred carboxylate is a silver salt of a long chain fatty acid such as silver behenate.
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