POLYHYDROXYALKANOATE AND PREPARATION METHOD THEREOF, CHARGE CONTROL AGENT CONTAINING PHA AND TONER BINDER AND TONER THEREFOR, IMAGE-FORMING METHOD USING TONER AND IMAGE-FORMING APPARATUS THEREFOR

摘要

PURPOSE: Provided are a novel polyhydroxyalkanoate(hereinafter simply "PHA"), and a process for producing the PHA, comprising the step of producing a PHA by the use of a microorganism having the ability to produce the PHA and accumulate it in the bacterial body. Also, a charge control agent which comprises the PHA, a toner binder and a toner therefor, an image-forming method making use of the toner and an image-forming apparatus therefor are provided. CONSTITUTION: Polyhydroxyalkanoate having in the molecule a unit represented by Chemical Formula(1) (wherein, R is arbitrarily selected from a hydrogen atom, a halogen atom, CN, NO2, COOR', SO2R", CH3, C2H5, C3H7, C(CH3)2H and C(CH3)3; where R' is H, Na, K, CH3 or C2H5, and R" is OH, ONa, OK, a halogen atom, OCH3 or OC2H5; and x is an integer arbitrarily selected from 1 to 8; with the proviso that a polyhydroxyalkanoate is excluded which has a hydrogen atom as R and x in all the units is 2 or 4).