Writable and printable colloidal gold solution

Details Writable and printable colloidal gold solution Writable and printable colloidal gold solution

2007-05-01

2007-05-01

Lorengo, J. A. (Department: 1755)

Compositions: coating or plastic

Coating or plastic compositions

Marking

C106S031650, C106S031750

Reexamination Certificate

active

10801763

ABSTRACT:
The present invention relates to an aqueous colloidal gold solution, comprising(a) nano-particular gold particles,(b) a compound having a polar tertiary amino group conjugated via a hydrophobic aromatic residue with a weaker alkaline group, and(c) a stabilizer comprising a mercapto group (—SH) and an acidic group, in particular a sulfonic acid group (—SO3−).This gold solution uses an ecologically compatible medium and is suited in an especial manner for writing and for printing, also for inkjet printers, since it has a long-term storage life and generates an attractive metal-like gold sheen.

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