Polyhydroxyalkanoate, producing method therefor, charge control agent containing such polyhydroxyalkanoate, toner containing such control agent and image forming method and image forming apparatus utilizing such toner

In a charge control agent, the improvement wherein the charge control agent comprises a polyhydroxyalkanoate including, in the polymer molecule, a unit represented by the following general formula (1):

• (wherein x stands for an integer selected within a range of 0-8 indicated in the chemical formula, and such unit may be present at least one in the polymer);
• a unit represented by the following general formula (2):
• (wherein x stands for an integer selected within a range of 0-8 indicated in the chemical formula, and such unit may be present at least one in the polymer);
• and at least one of the units represented by the following general formulas (3) to (6), namely:
• a unit represented by the following general formula (3):
• (wherein x stands for an integer selected within a range of 0-8 indicated in the chemical formula, and such unit may be present at least one in the polymer);
• a unit represented by the following general formula (4):
• (wherein x stands for an integer selected within a range of 0-8 indicated in the chemical formula, and such unit may be present at least one in the polymer);
• a unit represented by the following general formula (5):
• (wherein x stands for an integer selected within a range of 0-8 indicated in the chemical formula, and such unit may be present at least one in the polymer);
• and
• a unit represented by the following general formula (6):
• (wherein x stands for an integer selected within a range of 0-8 indicated in the chemical formula, and such unit may be present at least one in the polymer).