Toner having a toner particle with a binder resin containing a copolymer of a styrenic polymerizable monomer, and at least one of an acrylic or methacrylic polymerizable monomer
The toner contains a toner particle that has a binder resin, wherein an amount of a tetrahydrofuran THF-insoluble matter A collected when a THF dispersion of the binder resin is passed through a first filter having an average pore diameter of 8 μm, is not more than 10 mass % of the binder resin, and an amount of a THF-insoluble matter B collected when the THF dispersion that has been passed through the first filter is passed through a second filter having an average pore diameter of 0.8 μm, is from 5 mass % to 50 mass % of the binder resin.
1. A toner comprising;
a toner particle comprising a binder resin, said binder resin containing a copolymer of a crosslinking agent, a styrenic polymerizable monomer, and at least one member selected from the group consisting of acrylic polymerizable monomers and methacrylic polymerizable monomers;
the crosslinking agent being provided by a Michael addition reaction of a polyvalent mercapto compound represented by formula (2) to a multifunctional (meth)acrylate compound represented by formula (1)
where R 1 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms,
L 1 represents an m-valent linear or branched aliphatic hydrocarbon group optionally having a hydroxy group, or an ether bond-containing m-valent linear or branched aliphatic hydrocarbon group optionally having a hydroxy group, and
m is an integer of 3 to 6, and
where L 2 represents an alkylene group,
L 3 represents an n-valent linear or branched aliphatic hydrocarbon group optionally having a hydroxy group, or an ether bond-containing n-valent linear or branched aliphatic hydrocarbon group optionally having a hydroxy group, and
n is an integer from 3 to 6, wherein
an amount of a tetrahydrofuran-insoluble matter A collected when a tetrahydrofuran dispersion of the binder resin is passed through a first filter having an average pore diameter of 8 μm is not more than 10 mass % of the binder resin, and
an amount of a tetrahydrofuran-insoluble matter B collected when the tetrahydrofuran dispersion that has been passed through the first filter is passed through a second filter having an average pore diameter of 0.8 μm is 5 to 50 mass % of the binder resin.
2. The toner according to claim 1 , wherein a degree of tetrahydrofuran swelling of the tetrahydrofuran-insoluble matter B is 2.0 to 20.0.