Toner for use in electrophotographic systems

Patent metadata

Field	Value
Publication number	US-2016349645-A1
Application number	US-201615165945-A
Country	US
Kind code	A1
Filing date	May 26, 2016
Priority date	May 27, 2015
Publication date	Dec 1, 2016
Grant date	—

Abstract

Toner containing toner particles having a resin component, in which the resin component has an olefin-based copolymer and a crystalline polyester resin, the olefin-based copolymer has a unit Y1 represented by Formula (1) and at least one kind of unit Y2 selected from the group consisting of a unit represented by Formula (2) and a unit represented by Formula (3), a content of the olefin-based copolymer contained in the resin component is 50% by mass or more based on a total mass of the resin component, a content of the unit Y2 is 3% by mass or more and 35% by mass or less based on a total mass of the olefin-based copolymer, and a melt flow rate of the olefin-based copolymer is 30 g/10 min or less.

First claim

What is claimed is:

1 . Toner, comprising:
toner particles containing a resin component, wherein the resin component has an olefin-based copolymer and a crystalline polyester resin, the olefin-based copolymer has: a unit Y1 represented by Formula (1) shown below; and at least one kind of unit Y2 selected from the group consisting of a unit represented by Formula (2) shown below; and a unit represented by Formula (3) shown below, a content of the olefin-based copolymer contained in the resin component is 50% by mass or more based on a total mass of the resin component, a content of the unit Y2 is 3% by mass or more and 35% by mass or less based on a total mass of the olefin-based copolymer, and a melt flow rate of the olefin-based copolymer is 30 g/10 min or less,

wherein, in Formulae (1) to (3), R 2 is H or CH 3 , R 2 is H or CH 3 , R 3 is CH 3 or C 2 H 5 , R 4 is H or CH 3 , and R 5 is CH 3 or C 2 H 5 .

2 . The toner according to claim 1 , wherein
when the total mass of the olefin-based copolymer is defined as W, a mass of the unit represented by Formula (1) above, a mass of the unit represented by Formula (2) above, and a mass of the unit represented by Formula (3) above is defined as 1, m, and n, respectively, a (l+m+n)/W value is 0.8 or more.

3 . The toner according to claim 1 , wherein the olefin-based copolymer is at least one selected from the group consisting of
a copolymer having a unit represented by Formula (1) above, wherein R 1 in Formula (1) above is H and a unit represented by Formula (3) above, wherein R 4 in Formula (3) above is H and R 5 in Formula (3) above is CH 3 , a copolymer having a unit represented by Formula (1) above, wherein R 1 in Formula (1) above is H and a unit represented by Formula (3) above, wherein R 4 in Formula (3) above is H and R 5 in Formula (3) above is C 2 H 5 , and a copolymer having a unit represented by Formula (1) above, wherein R 1 in Formula (1) above is H and a unit represented by Formula (3) above, wherein R 4 in Formula (3) above is CH 3 and R 5 in Formula (3) above is CH 3 .

4 . The toner according to claim 1 , wherein
the toner particles contain aliphatic hydrocarbon having a melting point of 50° C. or more and 100° C. or less, and the aliphatic hydrocarbon is contained in a proportion of 1 part by mass or more and 30 parts by mass or less based on 100 parts by mass of the resin component.

5 . The toner according to claim 1 , wherein
a content of the crystalline polyester resin in the toner particles is 10 parts by mass or more and 30 parts by mass or less based on 100 parts by mass of the resin component.

6 . The toner according to claim 1 , wherein
the content of the unit Y2 in the olefin-based copolymer is 5% by mass or more and 20% by mass or less based on the total mass of the olefin-based copolymer.

7 . The toner according to claim 1 , wherein
the toner particles contain silicone oil, and a content of the silicone oil in the toner particle is 1 part by mass or more and 20 parts by mass or less based on 100 parts by mass of the resin component.

8 . The toner according to claim 1 , wherein
an endothermic amount in DSC measurement is 70 J/g or more and 150 J/g or less.

Assignees

• Canon Kk

Inventors

• Murayama Ryuji
• Ida Hayato
• Shibata Takaho
• Tamura Junichi
• Yamashita Daisuke
• Watanabe Akemi
• Ochi Kouichirou
• Chimoto Yuya
• Miyakai Tomoyo
• Hirasa Takashi

Classifications

• G03G9/08724

  Polyvinylesters · CPC title

• G03G9/08755 Primary

  Polyesters · CPC title