| 发明名称 |
Polyhydroxyalkanoate containing amide group, sulfonic group, and sulfonate ester group, method for producing the same, and charge control agent, toner, image forming method, and image forming apparatus |
| 摘要 |
A polyhydroxyalkanoate containing in a molecule at least one unit represented by the chemical formula (1). The polyhydroxyalkanoate is a biodegradable plastic with enhanced melt-processability and exhibits excellent charging stability, high chargeability, and enhanced dispersibility when used as a charge control agent of a toner in an electrophotographic process. (R denotes -A<SUB>1</SUB>(-SO<SUB>2</SUB>R<SUB>1</SUB>)<SUB>x</SUB>. R<SUB>1 </SUB>is selected from OH, a halogen atom, ONa, OK, and OR<SUB>1a</SUB>. R<SUB>1a </SUB>and A<SUB>1 </SUB>are selected from a substituted or unsubstituted aliphatic hydrocarbon structure, a substituted or unsubstituted aromatic ring structure, and a substituted or unsubstituted heterocyclic structure. Further, m and x are integers selected from 1 to 8, and when two or more units exist, each of R, R<SUB>1, </SUB>R<SUB>1a</SUB>, A<SUB>1</SUB>, m, and x is defined as above independently for each of the units.)
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