METAL COLLOID DISPERSIONS AND THEIR AQUEOUS METAL INKS

• Main Authors: SUN, JING, X, SUN, MARK, NAIYU, GUAN, YIMIN
• Format: Patent
• Language: English; French
• Published: 06.04.2006
• Subjects: ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; CORRECTING FLUIDS; CORRECTION OF TYPOGRAPHICAL ERRORS; DYES; FILLING PASTES; i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; INKS; LINING MACHINES; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; PERFORMING OPERATIONS; POLISHES; PRINTING; SELECTIVE PRINTING MECHANISMS; STAMPS; TRANSPORTING; TYPEWRITERS; USE OF MATERIALS THEREFOR; WOODSTAINS

A silver dispersion is obtained by reducing a silver compound in the presence of a polymeric dispersant of an ionic hydrophilic segments, such as methacrylic acid segments con and nonionic hydrophilic segments such as hydroxyl terminated polyethylene glycol segments. Aqueous inkjet inks may contain such dispersants and other common ingredients such as a humectant. The inks can be printed on ceramic substrates and sintered under heat to form solid, conductive patterns of silver. Selon l'invention, une dispersion d'argent est obtenue par réduction d'un composé argent en présence d'un dispersant polymère de segments hydrophiles ioniques, par exemple des segments d'acide méthacrylique et des segments hydrophiles non ioniques, de type segments de polyéthylèneglycol à terminaison hydroxyle. Des encres aqueuses pour l'impression par jet d'encre peuvent contenir lesdits dispersants et d'autres ingrédients communs, par exemple un humectant. Les encres peuvent être imprimées sur des substrats céramiques et frittées sous l'effet de la chaleur pour former des motifs en argent conducteurs et solides.