JP2021096333A5

JP2021096333A5 -

Info

Publication number: JP2021096333A5
Application number: JP2019226669A
Authority: JP
Filing date: 2019-12-16
Publication date: 2022-12-23
Anticipated expiration: 2039-12-16

Description

本発明は、結着樹脂及び極性基含有オレフィン共重合体を有するトナー粒子を含有するトナーであって、該結着樹脂は、下記一般式〔１〕で表されるユニットを有する変性ポリエステルを含有し、該変性ポリエステルの含有量が、該結着樹脂中、５０．０質量％以上であり、該極性基含有オレフィン共重合体は、極性を有するユニットとポリオレフィンユニットとを有する重合体であり、該極性を有するユニットが、α，β－不飽和カルボン酸およびその誘導体、不飽和ニトリルおよびその誘導体からなる群より選択されるいずれかの化合物に由来するユニットであることを特徴とするトナーに関する。 The present invention provides a toner containing toner particles having a binder resin and a polar group-containing olefin copolymer, wherein the binder resin contains a modified polyester having a unit represented by the following general formula [1]. and the content of the modified polyester in the binder resin is 50.0% by mass or more, and the polar group-containing olefin copolymer is a polymer having a polar unit and a polyolefin unit, The toner is characterized in that the polar unit is a unit derived from a compound selected from the group consisting of α,β-unsaturated carboxylic acids and their derivatives, unsaturated nitriles and their derivatives.

Claims

A toner having toner particles containing a binder resin and a polar group-containing olefin copolymer,
The binder resin contains a modified polyester having a unit represented by the following general formula [1],
The content of the modified polyester is 50.0% by mass or more in the binder resin,
The polar group-containing olefin copolymer is a polymer having a polar unit and a polyolefin unit,
The toner, wherein the polar unit is a unit derived from a compound selected from the group consisting of α,β-unsaturated carboxylic acid and its derivatives, unsaturated nitrile and its derivatives.

(In the formula, R ₁ and R ₂ each independently represent hydrogen, a methyl group or a phenyl group, and n represents an integer of 10-80.)

2. The toner according to claim 1, wherein the polar group-containing olefin copolymer contains 2.0% by mass or more and 60.0% by mass or less of the unit having polarity.

3. The toner according to claim 1, wherein the polar group-containing olefin copolymer has a weight average molecular weight (Mw) of 5.0×10 ³ or more and 7.0×10 ⁴ or less in molecular weight distribution by GPC.

4. The toner according to claim 1, wherein the toner particles contain 0.10 parts by mass or more and 20.0 parts by mass or less of the polar group-containing olefin copolymer per 100 parts by mass of the binder resin. .

5. The toner according to any one of claims 1 to 4 , wherein the modified polyester contains 0.5% by mass or more and 5.0% by mass or less of a silicone unit.

6. The toner according to any one of claims 1 to 5 , wherein both _R1 and _R2 in the general formula [1] of the silicone unit are methyl groups.