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US 7,141,184 B2Granted
Polymer conductive composition containing zirconia for films and coatings with high wear resistance
AssigneeCTS Corporation
InventorAntony P. Chacko
Life of this patent
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Abstract
A resistive composition for screen printing onto a substrate to form a cured film. The resistive composition, based on total composition, has a) 5–30 wt. % of polymer resin, b) 10–30 wt. % conductive particles selected from the group consisting of carbon black, graphite and mixtures thereof and c) 0.1–10 wt. % zirconia particles, wherein all of (a), (b), and (c) are dispersed in a 60–80 wt. % organic solvent. A cured resistive film composition is also disclosed.
Claims34
A resistive composition, based on total composition, comprising:
- a) 5–30 wt. % of polymer resin;
- b) 10–30 wt. % conductive particles selected from the group consisting of carbon black, graphite, silver, copper, nickel and mixtures thereof;
- c) 0.01–10 wt % zirconia particles;
- and
- e) a 60–80 wt. % organic solvent, wherein the polymer resin, conductive particles, and zirconia particles are dispersed in the organic solvent.
2 more elements
A method of forming a variable resistive element comprising:
- a) preparing a resistive composition by:
- forming a polymer solution by mixing at least a polymer resin and an organic solvent;
- mixing the polymer solution with conductive particles and zirconia particles to form a paste, wherein the zirconia particles are less than 0.5 microns in size;
- b) applying the resistive composition to a substrate;
- and
- c) curing the resistive composition on the substrate.
3 more elements
An applied film comprising:
- a) 40–80 percent by weight of a cured polymer resin;
- b) 10–35 percent by weight of conductive particles selected from the group consisting of carbon black, graphite and mixtures thereof;
- and
- c) 0.01–11 wt. percent by weight of zirconia particles, wherein the zirconia particles are less than 0.5 microns is size.
1 more element
Dependencies are inferred from the claim text.