Claims
- 1. A toner composition which possesses good fixation and no offset which contains a resin binder comprising:
- a polymerized product of (a) styrene and/or a derivative thereof,
- (b) a monomer component of at least one member selected from the group consisting of methacrylic acid, acrylic acid, a methacrylic ester, and an acrylic ester, and
- (c) 0.05 to 10 percent by weight, based on the total weight of the monomers, of a polybasic acid having 7 to 40 carbon atoms, or an anhydride thereof or a lower alkyl ester thereof having from 1 to 6 carbon atoms, said polybasic acid having the formula: ##STR3## wherein R represents an alkyl, alkylene, alkenylene or alkenyl group having 4 to 30 branched or straight chain carbon atoms and n is 0 or 1, and
- said monomer component (b) contains at least one acrylic or methacrylic ester having hydroxyl or epoxy groups in at least equimolor amounts with respect to component (c); and
- a colorant thereof.
- 2. The toner composition of claim 1 further containing a magnetic component comprising an alloy or compound containing a ferromagnetic element, said magnetic component being in the form of a fine powder having an average particle size of 0.1 to 1.mu. and dispersed in the binder resin in an amount of from 40 to 70 wt%.
- 3. The toner composition of claim 1 in which said resin binder has a softening point of 100.degree. to 160.degree. C. and a glass transition temperature of 50.degree. C. or higher.
- 4. The toner composition of claim 1, wherein said component (c) is reacted with said component (b) prior to said polymerization.
- 5. The toner composition of claim 1, wherein said component (c) is reacted with a polymer obtained from said components (a) and (b).
- 6. The toner composition of claim 1, wherein said component (c) is incorporated in said polymerized product.
Priority Claims (2)
Number |
Date |
Country |
Kind |
59-247633 |
Nov 1984 |
JPX |
|
59-247634 |
Nov 1984 |
JPX |
|
Parent Case Info
This application is a continuation of application Ser. No. 908,905 filed on Sep. 18, 1986, now abandoned, which is a divisional of application Ser. No. 800,268 filed on Nov. 21, 1985, now abandoned.
US Referenced Citations (4)
Foreign Referenced Citations (1)
Number |
Date |
Country |
57-185047 |
Feb 1983 |
JPX |
Divisions (1)
|
Number |
Date |
Country |
Parent |
800268 |
Nov 1985 |
|
Continuations (1)
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Number |
Date |
Country |
Parent |
908905 |
Sep 1986 |
|