Patent EP-2329902-A1 (EP)
Inventor: KIYOSHIMA REIKO
IPC: C09D7/62
Filed: 2005-06-22
Abstract: Metal colloidal particles are disclosed, which are capable of forming a metal colloid by dispersing in either or both of an aqueous dispersion medium and a nonaqueous dispersion medium in a range of 5 to 50 % by weight while mixing, comprising metal particles and a protective agent coordination-modified on the surface of the particles, wherein the particles constituting the metal colloidal particles are one or two or more metal particles made of a metal selected from the group consisting of A, Ag, Pt, Cu, Pd, Ni, Zn, Ru, Rh and Ir, and the protective agent having a carbon skeleton containing nitrogen in the molecule, and having a structure of being coordination-modified on the surface of the metal particles using nitrogen or an atomic group including nitrogen as an anchor, wherein the protective agent has one, or two or more functional groups selected from the group consisting of alkoxysilyl group, silanol group and hydroxyalkyl group in a molecular structure, and 
the metal particles contain an Au component as a main component contain one, or two or more metal components other than the Au component as an accessory component, and also satisfy at least obe selected from the following (A) to (E): 
(A) the accessory component constituting the metal particles contains at least an Ag component and a Cu component, and the content of the accessory component in the metal particles is from 5 to 40% by weight and the content of the Ag component in the accessory component is from 40 to 60% by weight, 
(B) the accessory component constituting the metal particles contains at least an Ag component and a Cu component, and 
the content of the accessory component in the metal particles is from 5 to 40% by weight and the content of Ag component in the accessory component is 65% by weight or more, 
(C) the accessory component constituting the metal particles contains at least an Ag component and a Cu component, and 
the content of the accessory component in the metal particles is from 5 to 40% by weight and the content of Ag component in the accessory component is 30% by weight or less, 
(D) the accessory component constituting the metal particles contains at least an Ag component, a Cu component, and a Pd component, and the content of the accessory component in the metal particles is from 5 to 40% by weight and the content of the Ag component in the accessory component is 30% by weight or less, 
(E) the accessory component constituting the metal particles contains at least a Pd component, and 
the content of the accessory component in the metal particles is from 5 to 40% by weight. 
     Further, a metal colloid-containing coat formed article, a transfer sheet, a metal colloid-containing coat formed article comprising a transfer film transferred from the transfer sheet, a pen, a brush-pencil, a cartridge for pen and a disposable ampoule, each being filled with the metal colloid and a base material with a conductive film, having resistivity of 1 × 10 -3  Ω•cm or less wherein the metal colloidal particles are contained, a stamp pad and a seal impression pad wherein the metal colloidal particles are contained, a drawn material comprising said metal colloidal particles are disclosed.