Claims
- 1. A solid phase change developer comprising:(a) a carrier having a Kauri-butanol number less than 30; and (b) an organosol comprising a graft (co)polymeric steric stabilizer covalently bonded to a thermoplastic (co)polymeric core, said thermoplastic (co)polymeric core is insoluble in said carrier, and said (co)polymeric steric stabilizer comprising a crystallizing polymeric moiety that independently and reversibly crystallizes at or above 30° C., wherein said phase change developer has an activation point at or above 22° C.
- 2. The phase change developer of claim 1 wherein said crystallizing polymeric moiety is a polymeric side-chain covalently bonded to said (co)polymeric steric stabilizer.
- 3. The phase change developer of claim 1 wherein said crystallizing polymeric moiety is a polymeric main-chain covalently bonded to said (co)polymeric steric stabilizer.
- 4. The phase change developer of claim 1 further comprises at least one colorant.
- 5. The phase change developer of claim 1 wherein said crystallizing polymeric moiety is derived from a polymerizable monomer selected form the group consisting of hexacontanyl (meth)acrylate, pentacosanyl (meth)acrylate, behenyl (meth)acrylate, octadecyl (meth)acrylate, hexyldecyl acrylate, tetradecyl acrylate, and amino functional silicones.
- 6. The phase change developer of claim 2 wherein said developer further comprises at least one colorant.
- 7. The phase change developer of claim 2 wherein said crystallizing polymeric moiety is derived from a polymerizable monomer selected form the group consisting of hexacontanyl (meth)acrylate, pentacosanyl (meth)acrylate, behenyl (meth)acrylate, octadecyl (meth)acrylate, hexyldecyl acrylate, tetradecyl acrylate, and amino functional silicones.
- 8. The phase change developer of claim 1 wherein the phase change developer has an activation point between about 30° C. and 80° C.
- 9. The phase change developer of claim 1 wherein a colorant is physically associated with the thermoplastic (co)polymeric core.
- 10. A method for electrophotographic imaging comprising:forming a patterned distribution of charge as an image; heating the phase change developer of claim 1; and allowing developer activated by the heating to distribute over the patterned distribution of charge as a step in developing the image.
- 11. The method of claim 10 wherein developer distributed over the patterned distribution of charge is transferred to a receptor surface.
- 12. The method of claim 11 wherein after the developer is transferred to a receptor surface, heat and/or pressure fixes the developer to the receptor surface.
- 13. The phase change developer of claim 1 wherein the developer is in the form of a developer stick.
- 14. The phase change developer of claim 1 having a melting point between 22° C. and 40° C.
- 15. The method of claim 10 wherein the developer is in the form of a developer stick.
- 16. The method of claim 15 wherein the developer has a melting point between 22° C. and 40° C.
- 17. A phase change developer comprising:(c) a carrier having a Kauri-butanol number less than 30; and (d) an organosol comprising a graft (co)polymeric steric stabilizer covalently bonded to a thermoplastic (co)polymeric core, said thermoplastic (co)polymeric core is insoluble in said carrier, and said (co)polymeric steric stabilizer comprising a crystallizing polymeric moiety that independently and reversibly crystallizes at or above 30° C. wherein said phase change developer has an activation point at or above 22° C.
Parent Case Info
This application claims the benefit of Provisional Application No. 60/285,184, filed Apr. 20, 2001.
US Referenced Citations (19)
Foreign Referenced Citations (2)
Number |
Date |
Country |
0 348 844 |
Oct 1994 |
EP |
0 605 108 |
May 1998 |
EP |
Provisional Applications (1)
|
Number |
Date |
Country |
|
60/285184 |
Apr 2001 |
US |