Toner

Patent metadata

Field	Value
Publication number	US-2016349640-A1
Application number	US-201615154802-A
Country	US
Kind code	A1
Filing date	May 13, 2016
Priority date	May 28, 2015
Publication date	Dec 1, 2016
Grant date	—

Abstract

A toner having a toner particle including a binder resin, wherein the binder resin includes a styrene acrylic resin and a vinyl-modified crystalline polyester resin, the vinyl-modified crystalline polyester resin has a crystalline polyester segment having structures of following i) or a structure of following ii),
i) at least two structures selected from the group consisting of a structure derived from an aliphatic dicarboxylic acid, a structure derived from an aliphatic diol and a structure derived from an aliphatic hydroxycarboxylic acid; ii) a structure derived from an aliphatic hydroxycarboxylic acid; and the vinyl-modified crystalline polyester resin has a specific modification rate.

First claim

What is claimed is:

1 . A toner comprising a toner particle including a binder resin,
wherein,
the binder resin comprises a styrene acrylic resin and a vinyl-modified crystalline polyester resin,
the vinyl-modified crystalline polyester resin has a crystalline polyester segment having structures of following i) or a structure of following ii),
i) at least two structures selected from the group consisting of:
a structure derived from an aliphatic dicarboxylic acid,
a structure derived from an aliphatic diol and
a structure derived from an aliphatic hydroxycarboxylic acid;
ii) a structure derived from an aliphatic hydroxycarboxylic acid; and
wherein, when
a modification rate (mass %) of the vinyl-modified crystalline polyester resin having a molecular weight of at least 1×10 3.5 and less than 1×10 {3.5+(A90−3.5)/4} is defined as X 1 ;
a modification rate (mass %) of the vinyl-modified crystalline polyester resin having a molecular weight of at least 1×10 {3.5+(A90−3.5)/4} and less than 1×10 {3.5+(A90−3.5)×2/4} is defined as X 2 ;
a modification rate (mass %) of the vinyl-modified crystalline polyester resin having a molecular weight of at least 1×10 {3.5+(A90−3.5)×2/4} and less than 1×10 {3.5+(A90−3.5)×3/4} is defined as X 3 ; and;
a modification rate (mass %) of the vinyl-modified crystalline polyester resin having a molecular weight of at least 1×10 {3.5+(A90−3.5)×3/4} and 1×10 (A90) or less is defined as X 4 ; where,
1×10 (A90) represents a molecular weight at an integrated value 90% of the integral molecular weight distribution curve,
X 1 , X2, X3 and X4 satisfies the following formula (1):
X 1 <X 2 <X 3 <X 4   (1).

2 . The toner according to claim 1 , wherein the vinyl-modified crystalline polyester resin is a block polymer including a crystalline polyester segment and a vinyl polymer segment.

3 . The toner according to claim 1 , wherein a mass ratio (modification rate) of the vinyl polymer segment in the vinyl-modified crystalline polyester resin is 10 mass % or more and 60 mass % or less.

4 . The toner according to claim 1 , wherein the weight average molecular weight (Mw) of the vinyl polymer segment in the vinyl-modified crystalline polyester resin is 3000 or more and 20000 or less.

5 . The toner according to claim 1 , wherein the weight average molecular weight (Mw) of the vinyl-modified crystalline polyester resin is 10000 or more and 100000 or less.

6 . The toner according to claim 1 , wherein a melting point of the vinyl-modified crystalline polyester resin is 55° C. or more and 85° C. or less.

7 . The toner according to claim 1 , wherein a content of the vinyl-modified crystalline polyester resin is 1 mass % or more and 35 mass % or less with respect to the binder resin.

8 . The toner according to claim 1 , wherein the crystalline polyester segment of the vinyl-modified crystalline polyester resin has the structure of i).

Assignees

• Canon Kk

Inventors

• Tanaka Masatake
• Nakagawa Yoshihiro
• Isono Naoya
• Takada Harumi
• Yajima Yuichi
• Nozaki Dai

Classifications

• G03G9/08728 Primary

  Polymers of esters · CPC title