| |
 |
Electrostatographic carrier beads and method of making |
| T102004 |
Electrostatographic carrier beads and method of making
|
|
| Patent Drawings: | |
| Inventor: |
Doane, et al. |
| Date Issued: |
July 6, 1982 |
| Application: |
06/319,814 |
| Filed: |
November 9, 1981 |
| Inventors: |
Doane; Donald L. (Berthoud, CO)
Ting; Vincent W. (Boulder, CO)
|
| Assignee: |
|
| Primary Examiner: |
|
| Assistant Examiner: |
|
| Attorney Or Agent: |
|
| U.S. Class: |
428/407 |
| Field Of Search: |
|
| International Class: |
G03G 9/113 |
| U.S Patent Documents: |
|
| Foreign Patent Documents: |
|
| Other References: |
|
|
| Abstract: |
Electrophotographic carrier beads, comprising steel shot as a core material, are coated and then cured by a single-pass manufacturing process, using a coating liquid consisting of a water-based modified epoxy whose three-dimensional, highly cross-linked cellular structure, is packed with a fluoropolymer. This water-based carrier coating makes use of the water-based modified epoxy described in U.S. Pat. No. 4,212,781.For a first example, this epoxy material is converted to an aqueous dispersion by mixing with deionized water, an aminoplast cross-linking resin (hexamethoxymethylmelamine), fluorinated ethylene-propylene, and chromium oxide.This aqueous dispersion is coated onto steel shot by a single-pass fluidized bed manufacturing process.For a second example, this epoxy material is converted to an aqueous dispersion by mixing with deionized water, said aminoplast cross-linking agent, said fluorinated ethylene-propylene and a second fluoropolymer, polytetrafluoroethylene.This aqueous dispersion is coated onto steel shot in the same manner. |
| Claim: |
|
| Description: |
|
|
|
|
