Patent ID: 11927914
Assignee: SANYO CHEMICAL INDUSTRIES, LTD.
Field: Optics (Instruments)
Classification: CPC G  C | IPC C  G

Claim 3:
4. The electrophotographic toner composition according to claim 1, wherein the polymer (A) satisfies all the following relational expressions (3) to (5):

1≤ΔTj/ΔTp≤40,  relational expression (3):

Tm/Ts≤1.25,  relational expression (4):

1.5≤ΔTp≤8.5,  relational expression (5):

wherein ΔTj, Tm, Ts, and ΔTp are values obtained by DSC measurement of the polymer (A); ΔTj is the melting enthalpy in mJ/mg; Tm is the melting peak temperature in Kelvin; Ts is the temperature in Kelvin at an intersection of a straight line (a) and a straight line (b) defined below; and ΔTp in Kelvin is the half-width of the melting peak indicating the melting peak temperature,
wherein the straight line (a) is a straight line connecting two temperature points on a DSC curve, wherein a vertical axis represents the heat flow; and a horizontal axis represents the temperature, obtained by DSC measurement of the polymer (A) during heating, wherein the two temperature points being where a value of DDSC, which is a value obtained by differentiating the heat flow with respect to the temperature, is zero immediately before and after a melting peak on the DSC curve, and
wherein the straight line (b) is a tangent line to the DSC curve at a peak top temperature in a DDSC curve, wherein the vertical axis represents the DDSC and the horizontal axis represents the temperature, on a low temperature side of the melting peak.