Silver coating composition for use in electronic applications and the like

Claim 1

A new silver-containing composition which is liquid when applied to a substrate, and forms an electrically conductive coating on the substrate, said composition being comprised of: (a) a silver pigment material, said pigment being finely particulated and having an average particle size of about 50 microns or less, (b) a ferro alloy pigment material which is selected from at least one of the group consisting of ferrophosphorous, ferromanganese, ferromolybdenum, ferrosilicon, ferrochrome, ferrovanadium, ferrozirconium, ferrotitanium, ferrotungsten, ferroboron and ferrocarbide, said ferro alloy pigment material is present in amount of about 5% to about 90% by weight of the total solids, said ferro alloy pigment havng an average particle size of less than about 70 microns, (c) binder resin which is selected from at least one of the group consisting of thermoplastic acrylic, vinyl, urethane, alkyd, polyester, hydrocarbon, fluoroelastomer and cellulosic resins, and thermosetting acrylic, polyester, epoxy, phenolic, urethane and alkyd resins, (d) the pigment to binder weight ratio in said composition being between about 10 to 1 and about 4 to 1, and (e) said composition containing a weight percent total solids from about 50% to about 85% and an organic solvent carrier for the composition being used as required.