| 摘要 |
PURPOSE: Provided are a novel polyhydroxyalkanoate (PHA), its production method, a charge control agent, a toner binder, an electrostatic latent image developing toner, an image forming method, and an image forming apparatus which are employed for electrophotography, electrostatic recording, electrostatic printing of such as a copying apparatus, a printer, a facsimile and the like. CONSTITUTION: The polyhydroxyalkanoate comprises units having the following chemical formulas(1) and (2), and at least one selected from four units having the following formulas(3), (4), (5) and (6), in a molecule. In the formula 1, R is a substituent optionally selected from H, a halogen atom, CN, NO2, COOR', SO2R", CH3, C2H5, CH3CH2CH2, (CH3)2CH and (CH3)3C (R' is H, Na, K, CH3 or C2H5; and R" is OH, ONa, OK, a halogen atom, OCH3 or OC2H5); and x is at least one optional integer value within the range shown in the formula 1; in the formula 2, R is a substituent optionally selected from H, a halogen atom, CN, NO2, COOR', SO2R", CH3, C2H5, CH3CH2CH2, (CH3)2CH and (CH3)3C (R' is H, Na, K, CH3 or C2H5; and R" is OH, ONa, OK, a halogen atom, OCH3 or OC2H5); and x is at least one optional integer value within the range shown in the formula 2. Other formulas are described in the description.
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