Polyester resin for toner

Details Polyester resin for toner Polyester resin for toner

C - Chemistry, Metallurgy

08

G

C08G 63/12 (2006.01) C08G 63/20 (2006.01) G03G 9/087 (2006.01)

Patent

CA 2048463

POLYESTER RESIN FOR TONER ABSTRACT OF THE DISCLOSURE A polyester resin for a toner capable of being stably prepared without an occurrence of an abrupt crosslinking reaction is provided. This polyester resin has a crosslinked structure and is derived from (a) at least one member selected from the group consisting of tribasic and tetrabasic carboxylic acid components and trihydric and tetrahydric alcohol components, (b) an aromatic or alicyclic diol component, at least one of the hydroxyl groups of which is a secondary hydroxyl group, (c) optionally other diol component, and (d) a dicarboxylic acid component, wherein the contents of the units of the component (a) and the units of the component (b) satisfy the requirement represented by the following formula (1): (8m+20n) a - (80m+80n) ? b ? (8m+20n) a - (12m+30n) (1) wherein m represents the molar fraction of the tribasic carboxylic acid component and trihydric alcohol component units in the units derived from the component (a), n represent the molar fraction of the tetrabasic carboxylic acid component units and tetrahydric alcohol component units in the units derived from the component (a), the sum of m and n is equal to 1, and a and b represent the molar ratios (mole%) of the units of the component (a) and the units of the component (b) based on the total of the carboxylic acid components, respectively.

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