Patent ID: 8637427

Claim:
A resin composition containing adsorptive ultrafine metal particles, comprising a resin composition that contains at least one kind of fatty acid metal salt of any one of Ni, Cu or Co in a low-density polyethylene and ultrafine silver particles having an average particle diameter of 1 to 100 nm, a plasmon absorption from 300 to 700 nm and an infrared absorption peak at 1518 cm −1 stemming from the bond between an organic acid component and a metal, wherein said organic acid is a saturated fatty acid having 3 to 30 carbon atoms, and a silver salt of said organic acid and at least one kind of the fatty acid metal salt of any one Ni, Cu or Co are heated and mixed in the low-density polyethylene to form said ultrafine silver particles and to render the organic acid present on the surfaces of said ultrafine silver particles so that the ultrafine silver particles and the fatty acid metal salt of any one of Ni, Cu or Co are dispersed in the low-density polyethylene.