Patent ID: 6733942
Filing Date: 2004-05-11
Classification: C08L,G03G

Abstract:
A toner composition comprising a binder resin component [component (A)] and a coloring agent component [component (B)], whereinthe binder resin component [component (A)] comprises a crosslinked aromatic polyester resin component [Component (a-1)] and a linear aromatic polyester resin component [component (a-2)], the crosslinked aromatic polyester resin component [component (a-1)] is a crosslinked aromatic polyester resin having a recurring unit represented by the following chemical formula (1), the polyhydric alcohol-derived atomic group Q in the chemical formula (1) comprising 39.9 to 65 mole % of a polyhydric alcohol-derived atomic group represented by the following chemical formula (2), 0.1 to 20 mole % of a polyhydric alcohol-derived atomic group represented by the following chemical formula (3) and 15 to 60 mole % of a polyhydric alcohol-derived atomic group represented by the following chemical formula (4), each mole % being based on the total moles of all the polyhydric alcohol-derived atomic groups present in the molecule of the component (a-1), a crosslinking group represented by the following chemical formula (6) being present in the component (a-1) in an amount of 0.1 to 20 mole % based on the total moles of all the polyhydric alcohol-derived atomic groups present in the molecule of the component (a-1), and the recurring unit represented by the chemical formula (1) being crosslinked by the crosslinking group represented by the chemical formula (6), the linear aromatic polyester resin component [component (a-2)] is a linear aromatic polyester resin having a recurring unit represented by the chemical formula (1), the polyhydric alcohol-derived atomic group Q in the chemical formula (1) comprising 40 to 85 mole % of a polyhydric alcohol-derived atomic group represented by the chemical formula (2) and 15 to 60 mole % of a polyhydric alcohol-derived atomic group represented by the chemical formula (4), each mole % being based on the total moles of all the polyhydric alcohol-derived atomic groups present in the molecule of the component (a-2), and the proportions of the component (a-1) and the component (a-2) are 5 to 80% by weight [the component (a-1)] and 20 to 95% by weight [the component (a-2)] based on the total weight of the two components: [wherein, in the chemical formula (1), Q is a polyhydric alcohol-derived atomic group; in the chemical formula (2), R1 is an atomic group having 2 to 10 carbon atoms; in the chemical formula (3), R2 is an atomic group having 3 to 10 carbon atoms; in the chemical formula (4), R3 and R4 may be the same or different and are each independently an atomic group having 2 to 10 carbon atoms; in the chemical formula (4), m and n may be the same or different and are each independently an integer of 1 to 10; and in the chemical formula (6), R6 is an atomic group having 1 to 20 carbon atoms which may be aliphatic or aromatic and which may comprise N, O and S as atoms other than C and H].