An electrostatic image developing toner, includes: a block copolymer that contains: a block A that has a glass transition temperature of about 60° C. or more; and a crystalline block B that has a melting point of about 25° C. or more derived from an ethylenically unsaturated compound, wherein the block copolymer satisfies the following equations (1) to (3):
30° C.≦[
T
(0.5 MPa)−
T
(30 MPa)]≦80° C. ( 1 )
60° C.≦
T
( 0.5 MPa) ( 2 )
T
(30 MPa)≦80° C. ( 3 )
wherein T( 0.5 MPa) represents a temperature at which a viscosity of the block copolymer is 10
4
Pa·s when a pressure applied by a flow tester is 0.5 MPa; and T(30 MPa) represents a temperature at which a viscosity of the block copolymer is 10
4
Pa·s when a pressure applied by a flow tester is 30 MPa.
一种静电成像开发用调色剂,包括:一种嵌段共聚物,其包含:具有约60℃或更高
玻璃化转变温度的A块;以及源自具有约25℃或更高熔点的
乙烯基不饱和化合物的结晶性B块,其中嵌段共聚物满足以下方程式(1)到(3):
30℃≦[T(0.5 MPa)-T(30 MPa)]≦80℃ (1)
60℃≦T(0.5 MPa) (2)
T(30 MPa)≦80℃ (3)
其中T(0.5 MPa)代表当流动测试仪施加0.5 MPa压力时,嵌段共聚物的粘度为104Pa·s的温度;T(30 MPa)代表当流动测试仪施加30 MPa压力时,嵌段共聚物的粘度为104Pa·s的温度。