JP2012002977A5

JP2012002977A5 -

Info

Publication number: JP2012002977A5
Application number: JP2010136921A
Authority: JP
Filing date: 2010-06-16
Publication date: 2013-08-01
Anticipated expiration: 2030-06-16

Description

本発明は、結着樹脂、着色剤を少なくとも含有するトナー粒子と無機微粉体を有するトナーにおいて、
該トナー粒子は、懸濁重合法で製造されたものであり、
該結着樹脂は、スチレンアクリル樹脂であり、
該トナーを試料として用いて、テトラヒドロフラン（ＴＨＦ）によるソックスレー抽出を行ったとき、
ｉ）ＴＨＦに抽出されるＴＨＦ可溶分には、該スチレンアクリル樹脂に由来するＴＨＦ可溶分Ｓ（ｐ）が含有されており、
ｉｉ）該ＴＨＦ可溶分Ｓ（ｐ）の量が、該スチレンアクリル樹脂を基準として、５０質量％以上８５質量％以下であり、
ｉｉｉ）該ＴＨＦ可溶分Ｓ（ｐ）のゲルパーミエーションクロマトグラフィー（ＧＰＣ）でのピーク分子量Ｍｐ（ｐ）が１２０００以上１６０００以下であり、
アセトン／水の９５：５混合溶媒（アセトン溶液）に該トナーを分散させ、該トナーに含有される該スチレンアクリル樹脂の３０質量％に相当する量を、該トナーの表面から溶解することにより得られる溶解液に含有される、該スチレンアクリル樹脂に由来する可溶分のＧＰＣでのピーク分子量をＭｐ（ｑ）としたとき、該Ｍｐ（ｐ）と該Ｍｐ（ｑ）とが下記式（１）を満たすことを特徴とするトナーに関する。
式（１）０．６０≦Ｍｐ（ｑ）／Ｍｐ（ｐ）≦０．９５ The present invention relates to a toner having toner particles containing at least a binder resin and a colorant and an inorganic fine powder.
The toner particles are produced by a suspension polymerization method ,
The binder resin is a styrene-acrylic resin,
When the Soxhlet extraction with tetrahydrofuran (THF) was performed using the toner as a sample ,
The THF-soluble matter extracted into i) THF, THF-S resulting from the styrene-acrylic resins (p) are contained,
ii) The amount of the THF-soluble matter S (p) is, based on the styrene-acrylic resin is 85 wt% or less than 50 wt%,
iii) The molecular weight Mp (p) of the THF-soluble component S (p) in gel permeation chromatography (GPC) is 12000 or more and 16000 or less,
The toner is dispersed in a 95: 5 mixed solvent (acetone solution) of acetone / water , and an amount corresponding to 30% by mass of the styrene acrylic resin contained in the toner is dissolved from the surface of the toner. contained in the solution to be, when the peak molecular weight of at solubles of GPC derived from the styrene-acrylic resin and Mp (q), the Mp (p) with the Mp (q) and the following formula (1 It is related with the toner characterized by satisfy | filling.
Formula (1) 0.60 <= Mp (q) / Mp (p) <= 0.95

Claims

In a toner having toner particles and inorganic fine powder containing at least a binder resin and a colorant,
The toner particles are produced by a suspension polymerization method ,
The binder resin is a styrene-acrylic resin,
When the Soxhlet extraction with tetrahydrofuran (THF) was performed using the toner as a sample ,
The THF-soluble component extracted in i) THF, THF-soluble matter S derived from the styrene-acrylic resins (p) are contained,
ii) The amount of the THF-soluble matter S (p) is, based on the styrene-acrylic resin is 85 wt% or less than 50 wt%,
iii) The molecular weight Mp (p) of the THF-soluble component S (p) in gel permeation chromatography (GPC) is 12000 or more and 16000 or less,
The toner is dispersed in a 95: 5 mixed solvent (acetone solution) of acetone / water , and an amount corresponding to 30% by mass of the styrene acrylic resin contained in the toner is dissolved from the surface of the toner. contained in the solution to be, when the peak molecular weight of at solubles of GPC derived from the styrene-acrylic resin and Mp (q), the Mp (p) with the Mp (q) and the following formula (1 A toner characterized by satisfying
Formula (1) 0.60 <= Mp (q) / Mp (p) <= 0.95

The following formula (2) is satisfied, where S (q) is an acetone-soluble component derived from the binder resin component when the toner is subjected to Soxhlet extraction with acetone. The toner according to 1.
Formula (2) 5.0 mass% ≦ S (p) −S (q) ≦ 25.0 mass%

The toner according to claim 1, wherein the toner has a core-shell structure, and the shell layer contains at least a polyester resin.

The toner according to any one of claims 1 to 3 , wherein the toner contains 1.0 to 7.0 parts by mass of the polyester resin with respect to 100 parts by mass of the binder resin. .

In the monomer component constituting the polyester resin, 80 mol% or more of the alcohol component is a propylene oxide adduct of bisphenol A, and the average addition mole number of the propylene oxide adduct is 1.5 or more and 2.1 or less. The toner according to claim 4.

The toner according to claim 1, wherein the Mp (p) and the Mp (q) satisfy the following formula (2).
Formula (2) 0.60 ≦ Mp (q) / Mp (p) ≦ 0.85