Electrostatographic toner containing organometallic dimethyl sulfoxide complex charge control agent
View Patent ↗The present invention is an electrostatographic toner that includes an organometallic complex of dimethyl sulfoxide with a metal salt as a charge control agent having the structure; (M +n ) x ((CH 3 ) 2 SO 2 ) y (A −q ) z where n, q, x and z are integers between 1 and 6, and y is an integer between 2 and 12, The present invention also includes a developer having a toner, an organometallic complex of dimethyl sulfoxide with a metal salt as a charge control agent having the structure; (M +n ) x ((CH 3 ) 2 SO 2 ) y (A −q ) z where n, q, x and z are integers between 1 and 6, and y is an integer between 2 and 12, and a carrier particle.
1. An electrostatographic toner comprising:
a polymeric binder; and
an organometallic complex of dimethyl sulfoxide with a metal salt as a charge control agent having the structure:
(M +n ) x ((CH 3 ) 2 SO) y (A −q ) z
where M +n represents a metallic cation, A −q represents an anion, n, q, x and z are integers between 1 and 6, and y is an integer between 2 and 12.
2. The electrostatographic toner of claim 1 wherein the dimethyl sulfoxide complex comprises a metal salt having a cation selected from aluminum, tin, cobalt and copper.
3. The electrostatographic toner of claim 2 wherein the metal salt comprises an anion of sulfate, carboxylate, chloride or nitrate.
4. The electrostatographic toner of claim 2 wherein the charge control agent comprises a dimethyl sulfoxide complex of aluminum sulfate.
5. The electrostatographic toner of claim 2 wherein the charge control agent comprises a dimethyl sulfoxide complex of copper sulfate.
6. The electrostatographic toner of claim 2 wherein the charge control agent comprises a dimethyl sulfoxide complex of cobalt (II) sulfate.
7. The electrostatographic toner of claim 2 wherein the charge control agent comprises a dimethyl sulfoxide complex of cobalt (II) chloride.
8. The electrostatographic toner of claim 1 wherein said polymer binder is selected from the group consisting of polycarbonates, resin-modified maleic alkyd polymers, polyainides, phenol-formaldehyde polymers, and polyester condensates.
9. The electrostatographic toner of claim 1 further comprising: colorant materials.
10. The electrostatographic toner of claim 1 further comprising: release agents.
11. The electrostatographic toner of claim 1 wherein the organometallic complex is present in an amount of from 0.05 to 6 parts by weight per 100 parts by weight of the polymeric binder.
12. An electrostatographic developer comprising:
electrostatographic toner comprising a polymeric binder and an organometallic complex of dimethyl sulfoxide with a metal salt as a charge control agent having the structure:
(M +n ) x ((CH 3 ) 2 SO) y (A −q ) z
where M +n represents a metallic cation, A −q represents an anion, n, q, x and z are integers between 1 and 6, and y is an integer between 2 and 12; and
carrier particles.
13. The electrostatographic developer of claim 12 wherein said polymer binder is selected from the group consisting of polycarbonates, resin-modified maleic alkyd polymers, polyamides, phenol-formaldehyde polymers, and polyester condensates.
14. The electrostatographic developer of claim 12 wherein the dimethyl sulfoxide complex comprises a metal salt having a cation selected from aluminum, tin, cobalt and copper.
15. The electrostatographic developer of claim 14 wherein the metal salt comprises an anion of sulfate, carboxylate, chloride or nitrate.
16. The electrostatographic developer of claim 12 wherein the organometallic complex is present in an amount of from 0.05 to 6 parts by weight per 100 parts by weight of the polymeric binder.