US 2024/0053691 A1Published application

Toner and method for producing toner

AssigneeCanon Kabushiki Kaisha

InventorsKENTA KAMIKURA, KOSUKE FUKUDOME, SHOHEI TSUDA, SATOSHI ARIMURA, TORU ISHII, YUTA KOMIYA

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Abstract

A toner comprising a toner particle comprising a resin A and a resin B; wherein: the resin A is a vinyl resin having a sulfonic acid-type group, the resin B is a polyester resin; and when in analysis of the toner particle using time-of-flight secondary ion mass spectrometry, DA (nm) is defined as a depth at which an abundance of the resin A in a depth of 10 nm from a toner particle surface is a maximum, CAS (%) is defined as an abundance of the resin A at the depth DA, CBS (%) is defined as an abundance of the resin B at the depth DA, CA75 (%) is defined as an abundance of the resin A at a depth of 75 nm and CB75 (%) is defined as an abundance of the resin B at a depth of 75 nm, CAS, CA75, CBS and CB75 satisfy specific relationships.

Claims15

Dependent claims

A toner comprising a toner particle, the toner particle comprising a resin A and a resin B;

wherein:
the resin A is a vinyl resin having at least one sulfonic acid-type group selected from the group consisting of a sulfonic acid group, a sulfonate salt group, and a sulfonate ester group;
the resin B is a polyester resin;
and
when in analysis in a depth direction of the toner particle using time-of-flight secondary ion mass spectrometry, DA (nm) is defined as a depth at which an abundance of the resin A in a depth of 10 nm from a toner particle surface is a maximum, CAS (%) is defined as an abundance of the resin A at the depth DA, CBS (%) is defined as an abundance of the resin B at the depth DA, in each case calculated from a spectrum for the depth DA, CA75 (%) is defined as an abundance of the resin A at a depth of 75 nm and CB75 (%) is defined as an abundance of the resin B at a depth of 75 nm, in each case calculated from a spectrum for a depth of 75 nm,
CAS is 40.0 to 85.0,
CAS/CA75 is 1.5 to 5.0,
CBS/CB75 is 1.5 to 5.0,
CAS/CBS is 1.0 to 6.0, and
(CAS/CBS)/(CA75/CB75) is 0.5 to 3.0.

7 more elements

A toner production method for producing a toner comprising a toner particle comprising a resin A and a resin B;

wherein:
the resin A is a vinyl resin having at least one sulfonic acid-type group selected from the group consisting of a sulfonic acid group, a sulfonate salt group, and a sulfonate ester group;
the resin A is a vinyl resin having at least one sulfonic acid-type group selected from the group consisting of a sulfonic acid group, a sulfonate salt group, and a sulfonate ester group;
the resin B is a polyester resin;
when in analysis in a depth direction of the toner particle using time-of-flight secondary ion mass spectrometry, DA (nm) is defined as a depth at which an abundance of the resin A in a depth of 10 nm from a toner particle surface is a maximum, CAS (%) is defined as an abundance of the resin A at the depth DA, CBS (%) is defined as an abundance of the resin B at the depth DA, in each case calculated from a spectrum for the depth DA, CA75 (%) is defined as an abundance of the resin A at a depth of 75 nm and CB75 (%) is defined as an abundance of the resin B at a depth of 75 nm, in each case calculated from a spectrum for a depth of 75 nm,
CAS is 40.0 to 85.0,
CAS/CA75 is 1.5 to 5.0,
CBS/CB75 is 1.5 to 5.0,
CAS/CBS is 1.0 to 6.0, and
(CAS/CBS)/(CA75/CB75) is 0.5 to 3.0;
and
the toner production method has a heat treatment step of subjecting a toner particle precursor comprising the resin A and the resin B to treatment for at least 10 minutes in an aqueous medium at a pH of 7.5 to 10.0 at a temperature of 95° C. to 120° C.

9 more elements

Dependencies are inferred from the claim text.