Polyhydroxyalkanoate having amide, sulfonic acid or sulfonate ester group, charge control agent and toner
US7638590B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 24, 2005 |
| Grant date | Dec 29, 2009 |
| Priority date | — |
| Expiry date | Jul 1, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/08791
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention provides a novel polyester adapted for use in a charge control agent for a toner for an electrophotographic process, having a charge stability, a high charge amount, an improved dispersibility and a biodegradability, and a producing method and an application technology therefore. According to the invention, there is provided polyhydroxyalkanoate comprising at least one unit represented by the following chemical formula in a molecule:—(O—CH(—(CH2)m—CH2-p-C6H4—CONH-A1SO2R1)CH2CO)—(wherein R1 represents OH, a halogen atom, ONa, OK or OR1a; A1 and R1a each represents a substituted or unsubstituted aliphatic hydrocarbon structure, a substituted or unsubstituted aromatic cyclic structure or a substituted or unsubstituted heterocyclic structure; m represents an integer selected from a range of 0 to 7; and R1, A1, R1a and m have the aforementioned meanings independently for each unit when plural units are present), a charge control agent containing such polyhydroxyalkanoate, a toner utilizing such charge control agent, and an image forming method and an image forming apparatus utilizing such toner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.