Toner

1. A toner comprising a toner particle containing a binder resin, wherein

the binder resin contains a block polymer and a styrene-acrylic resin;

the block polymer has a vinyl polymer segment and a crystalline polyester segment;

the polyester segment is a segment produced by condensation polymerization of the following (I), (II) and (III):

(I) a dicarboxylic acid having carboxyl groups at both terminals of a linear alkane having 2 to 16 carbon atoms;

(II) a diol having hydroxy groups at both terminals of a linear alkane having 2 to 16 carbon atoms; and

(III) an alkane compound having 3 to 24 carbon atoms, or an alkyl ester, lactone or acid anhydride compound derived from the alkane compound;

the alkane compound is at least one compound selected from the group consisting of the following (a) to (f):

(a) a branch alkanedicarboxylic acid;

(b) a branch alkanediol;

(c) a branch alkane monohydroxy monocarboxylic acid;

(d) a linear alkanedicarboxylic acid at least one of carboxyl groups of which is linked to a moiety other than a terminal;

(e) a linear alkanediol at least one of hydroxy groups of which is linked to a moiety other than a terminal; and

(f) a linear alkane monohydroxy monocarboxylic acid at least one of carboxyl group and hydroxy group of which is linked to a moiety other than a terminal;

the block polymer has a melting point (Tm) of 50° C. to 95° C.; and

the binder resin contains the block polymer at 2.0% by mass to 50.0% by mass.

2. The toner according to claim 1 , wherein the block polymer has a half-width of an endothermic peak, derived from the block polymer, of 4.0° C. to 12.0° C. as observed in differential scanning calorimetric measurement.

3. The toner according to claim 1 , wherein the block polymer has a mass ratio between the vinyl polymer segment and the polyester segment ((mass of the vinyl polymer segment):(mass of the polyester segment)) of 30:70 to 80:20.

4. The toner according to claim 3 , wherein the block polymer has a mass ratio between the vinyl polymer segment and the polyester segment ((mass of the vinyl polymer segment):(mass of the polyester segment)) of 30:70 to 70:30.

5. The toner according to claim 1 , wherein the binder resin contains the block polymer at 6.0% by mass to 50.0% by mass.

6. The toner according to claim 1 , wherein the toner particle further contains a wax and satisfies the following formulae (1) and (2):

( SPB− 1.0)≦ SPC≦SPB   (1)

( SPW+ 0.4)≦ SPC   (2),

where SPB is an SP value of the styrene-acrylic resin; SPC is an SP value of the polyester segment of the block polymer and SPW is an SP value of the wax.

7. The toner according to claim 1 , wherein the vinyl polymer segment has a weight-average molecular weight (Mw) of 4000 to 15000.

8. The toner according to claim 1 , wherein the block polymer has a weight-average molecular weight (Mw) of 15000 to 40000.

9. The toner according to claim 1 , wherein the block polymer has a weight-average molecular weight (Mw) of 20000 to 40000.

10. The toner according to claim 1 , wherein the toner particle is produced by a suspension polymerization method.