Polyhydroxyalkanoate copolymer, resin composition, molded product, toner, image forming method and image forming apparatus

A polyhydroxyalkanoate copolymer comprising at least, per polymer molecule, one kind of unit selected from the group consisting of chemical formulae (1) and (2):

• (wherein R is any one selected from the group consisting of H, halogen, CN, NO2, COOR′, SO2R″ (R′ is any one selected from the group consisting of H, Na, K, CH3 and C2H5;
• R″ is any one selected from the group consisting of OH, ONa, OK, halogen, OCH3 and OC2H5), CH3, C2H5, C3H7, (CH3)2—CH and (CH3)3—C, and when more than one unit exist, R of each unit can represent any one of the substituents described above independently;
• and x is an integer selected from 1 to 7 and can differ for each unit)
• (wherein R is any one selected from the group consisting of H, halogen, CN, NO2, COO R′, SO2R″ (R′ is any one selected from the group consisting of H, Na, K, CH3 and C2H5;
• R″ is any one selected from the group consisting of OH, ONa, OK, halogen, OCH3 and OC2H5), CH3, C2H5, C3H7, (CH3)2—CH and (CH3)3—C, and when more than one unit exist, R of each unit can represent any one of the substituents described above independently;
• and x is an integer selected from 1 to 7 and can differ for unit)
• and at least one unit selected from the group consisting of chemical formulae (3) to (6):
• (wherein m is an integer selected from the range shown in the same chemical formula;
• wherein Rz in chemical formula (3) is any one residue selected from the group consisting of chemical formulae (8), (9), (10), (12), (13), (14) and (15):
• (wherein R1 is any one selected from the group consisting of H, halogen, CN, NO2, COOR′ except the substituent introduced into the para-position of the phenyl group (R′ is any one selected from the group consisting of H, Na and K), CH3, C2H5, C3H7, CF3, C2F5 and C3F7, and when more than one unit exist, R1 of each unit can represent any one of the substituents described above independently)
• (wherein R2 is any one selected from the group consisting of H, halogen, CN, NO2, CH3, C2H5, C3H7, SCH3, CF3, C2F5 and C3F7, and when more than one unit exist, R1 of each unit can represent any one of the substituents described above independently)
• (wherein R3 is any one selected from the group consisting of H, halogen, CN, NO2, CH3, C2H5, C3H7, CF3, C2F5 and C3F7, and when more than one exist, R3 of each unit can represent any one of the substituents described above independently)
• and when more than one unit exist, m and Rz of each unit can independently represent any one of the integers and the substituents described above, respectively)
• (wherein Ra is any one selected from the group consisting of H, CN, NO2, halogen, CH3, C2H5, C3H7, CF3, C2F5 and C3F7;
• k is an integer selected from the range shown in the same chemical formula;
• and when more than one unit exist, k and Ra of each unit can independently represent any one of the integers and the substituents described above, respectively)
• (wherein n is an integer selected from the range shown in the same chemical formula, and when more than one unit exist, n of each unit can represent any one of the integers described above independently)
• (wherein n is an integer selected from the range shown in the same chemical formula;
• Rb is any one selected from the group consisting of H, Na and K;
• and when more than one unit exist, n and Rb of each unit can independently represent any one of the integers and the substituents described above, respectively).