Binder resin for toner, toner and method for producing same
AssigneeMitsui Chemicals, Inc.
InventorsHiroshi Matsuoka, Hiroyuki Takei, Linwood Blanton Muire, III
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Abstract
Disclosed is a binder resin for a toner containing at least a carboxyl group-containing vinyl resin (C), a glycidyl group-containing vinyl resin (E), a reaction product of the vinyl resins and a saturated crystalline polyester (S), wherein the saturated crystalline polyester (S) has a predetermined melting point and a predetermined metal component (M), and the binder resin for a toner has a predetermined loss modulus (G″) and a predetermined storage modulus (G′).
Claims18
A binder resin for a toner comprising a carboxyl group-containing vinyl resin (C), a glycidyl group-containing vinyl resin (E), a reaction product of the vinyl resins and a saturated crystalline polyester (S), wherein said saturated crystalline polyester (S) has a melting point of equal to or more than 75 degrees centigrade and equal to or less than 120 degrees centigrade,
- a metal component (M) selected from Zn, Ca, Mg, Al and Ba (however, excluding metal oxide) is dispersed in said saturated crystalline polyester (S), and
- the loss modulus (G″) of said binder resin for a toner at 120 degrees centigrade is equal to or more than 0.3×104 Pa and equal to or less than 2.7×104 Pa at a measurement frequency of 6.28 rad/sec, and the minimum value of the storage modulus (G′) at equal to or more than 50 degrees centigrade and equal to or less than 200 degrees centigrade is equal to or more than 1.0×102 Pa and equal to or less than 1.5×104 Pa.
A method for producing a binder resin for a toner, comprising:
- obtaining a mixture with the addition of an organic metal salt to a saturated crystalline polyester (S), and
- mixing said obtained mixture, a carboxyl group-containing vinyl resin (C) and a glycidyl group-containing vinyl resin (E).
A binder resin for a toner comprising a carboxyl group-containing vinyl resin (C), a glycidyl group-containing vinyl resin (E), a reaction product of the vinyl resins and a saturated crystalline polyester (S), wherein said saturated crystalline polyester (S) has a melting point of equal to or more than 75 degrees centigrade and equal to or less than 120 degrees centigrade,
- a metal component (M) selected from Zn, Ca, Mg, Al and Ba (however, excluding metal oxide) is dispersed in said saturated crystalline polyester (S), and
- the loss modulus (G″) of said binder resin for a toner at 120 degrees centigrade is equal to or more than 0.3×104 Pa and equal to or less than 2.7×104 Pa at a measurement frequency of 6.28 rad/sec, and the minimum value of the storage modulus (G′) at equal to or more than 50 degrees centigrade and equal to or less than 200 degrees centigrade is equal to or more than 1.0×102 Pa and equal to or less than 1.5×104 Pa,
- wherein said metal component (M) is contained in an amount of equal to or more than 0.011 mass % and equal to or less than 1 mass %, based on the total weight of 100 mass % of said carboxyl group-containing vinyl resin (C), said glycidyl group-containing vinyl resin (E), a reaction product of the vinyl resins and said saturated crystalline polyester (S),
- wherein said metal component (M) is derived from a fatty acid metal salt represented by the following general formula,
- (CnH2n+1COO)m-M [Chemical Formula 1]
- wherein, in the formula, n is an integer of 11 to 22;
- m is an integer of 2 to 3;
- and M is a metal selected from Zn, Ca, Mg, Al and Ba.
Dependencies are inferred from the claim text.