JP2020024362A5 - - Google Patents

Claims (11)

A toner having toner particles containing a binder resin and a wax.
The binder resin contains amorphous resin A,
In the dynamic viscoelasticity measurement of the toner
Measured at a frequency of 1 Hz, the temperature at which the loss elastic modulus G'' is 1.00 × ¹⁰⁶ Pa is defined as T (1 Hz).
Measured at a frequency of 20 Hz, the temperature at which the loss elastic modulus G'' is 1.00 × ¹⁰⁶ Pa is defined as T (20 Hz).
The following formula is used when the maximum value of the ratio (tan δ) of the loss elastic modulus G'' to the stored elastic modulus G'when measured at a frequency of 20 Hz in the range of 60 ° C. or higher and 90 ° C. or lower is tan δ (P). A toner characterized by satisfying (1) to (4).
Equation (1) T (20Hz) -T (1Hz) ≤ 7.0 ° C
Equation (2) 0.80 ≤ tan δ (P) ≤ 1.90
Equation (3) 60 ° C ≤ T (1 Hz) ≤ 80 ° C
Equation (4) 60 ° C ≤ T (20 Hz) ≤ 80 ° C The toner according to claim 1, wherein the toner particles have a coating layer on the surface. The toner according to claim 2, wherein the thickness of the coating layer is 10 nm or more and 200 nm or less. The coating layer contains amorphous resin B and is
The toner according to claim 2 or 3, wherein the glass transition temperature of the amorphous resin B is 60 ° C. or higher and 90 ° C. or lower. The toner according to claim 4, wherein the amorphous resin B contains a polyester resin. The fifth aspect of the present invention, wherein the polyester resin has at least one of a structure represented by -O-CH ₂ -CH ₂ -O- and a structure represented by -C (= O) -C (= O)-. The toner described. The toner according to claim 5 or 6, wherein the polyester resin has a structure represented by the following formula (A).

The amorphous resin A is a resin having a styrene acrylic polymer moiety.
The toner according to any one of claims 1 to 7, wherein the content of the resin having the styrene acrylic polymer moiety in the binder resin is 50% by mass or more. The toner according to any one of claims 1 to 8, wherein the wax contains an ester compound of a diol having 2 or more and 6 or less carbon atoms and an aliphatic monocarboxylic acid having 14 or more and 22 carbon atoms or less. The toner according to any one of claims 1 to 9, wherein the content of the wax in the toner is 5.0% by mass or more and 20.0% by mass or less. The toner according to any one of claims 1 to 10, wherein the wax contains an ester compound selected from the group consisting of ethylene glycol distearate, ethylene glycol dipalmitate, and ethylene glycol dibehenate.