Claims
- 1. A toner composition comprising a polymeric binder and a charge control agent having the general structure: ##STR8## wherein R.sup.1 represents alkylene; arylene; arylenedialkylene; alkylenediarylene; oxydialkylene; or oxydiarylene;
- R.sup.2 represents alkyl containing from 1 to 20 carbons; cycloalkyl containing from 3 to 18 carbons; unsubstituted aromatic ring systems; aromatic ring systems substituted with alkyl, hydroxy, alkoxy, carboxy, carboalkoxy, nitro, halo, cyano, amino, dialkylamino, acyl, trihalomethyl or alkylsulfonyl; or heteroaromatic ring systems having (a) a solitary ring or 2 to 3 linked or fused rings and (b) containing from 3 to 34 carbons;
- R.sup.3 represents alkyl containing from 1 to 20 carbons; cycloalkyl containing from 3 to 18 carbons; unsubstituted aromatic ring systems; aromatic ring systems substituted with alkyl, hydroxy, alkoxy, carboxy, carboalkoxy, nitro, halo, cyano, amino, dialkylamino, acyl, trihalomethyl or alkylsulfonyl; heteroaromatic ring systems having (a) a solitary ring or 2 to 3 linked or fused rings and (b) containing from 3 to 34 carbons; unsubstituted ethenyl; or ethenyl substituted with alkyl containing from 1 to 20 carbons; aryl containing from 5 to 10 carbons; or aryl substituted with alkyl, hydroxy, carboxy, carboalkoxy, nitro, halo, cyano, amino, dialkylamino, acyl, trihalomethyl, or alkylsulfonyl.
- 2. The toner composition according to claim 1 wherein said charge control agent has the general structure: ##STR9## wherein X and Y, each of which can be the same or different, are hydrogen, alkyl, hydroxy, alkoxy, carboxy, carboalkoxy, halo, nitro, cyano, amino, dialkylamino, acyl, trihalomethyl or alkylsulfonyl and R.sup.1 is as defined above; and each n is independently an integer of from 0 to 5.
- 3. A toner composition according to claim 1 wherein said polymeric binder is a styrenic/acrylic copolymer having a glass transition temperature in the range of about 500.degree. C. to about 100.degree. C.
- 4. A toner composition according to claim 3 wherein said polymeric binder is a copolymer of styrene and n-butyl acrylate, crosslinked with divinylbenzene.
- 5. The toner composition according to claim 4 wherein the weight ratio of styrene to n-butyl acrylate is in the range of from 90:10 to 60:40 and the divinylbenzene is used at a level of 3.0 weight percent or less.
- 6. The toner composition according to claim 1 wherein the weight percent of charge control agent is in the range of about 0.5 to 7.0 weight percent.
- 7. The toner composition according to claim 1 further comprising a colorant.
- 8. An electrostatographic developer comprising a carrier and a toner composition; wherein the toner compositions contains a polymeric binder and a charge control agent having the general structure: ##STR10## wherein R.sup.1 represents alkylene; arylene; arylenedialkylene; alkylenediarylene; oxydialkylene; or oxydiarylene;
- R.sup.2 represents alkyl containing from 1 to 20 carbons; cycloalkyl containing from 3 to 18 carbons; unsubstituted aromatic ring systems; aromatic ring systems substituted with alkyl, hydroxy, alkoxy, carboxy, carboalkoxy, nitro, halo, cyano, amino, dialkylamino, acyl, trihalomethyl or alkylsulfonyl; or heteroaromatic ring systems having (a) a solitary ring or 2 to 3 linked or fused rings and (b) containing from 3 to 34 carbons;
- R.sup.3 represents alkyl containing from 1 to 20 carbons; cycloalkyl containing from 3 to 18 carbons; unsubstituted aromatic ring systems; aromatic ring systems substituted with alkyl, hydroxy, alkoxy, carboxy, carboalkoxy, nitro, halo, cyano, amino, dialkylamino, acyl, trihalomethyl or alkylsulfonyl; heteroaromatic ring systems having (a) a solitary ring or 2 to 3 linked or fused rings and (b) containing from 3 to 34 carbons; unsubstituted ethenyl; or ethenyl substituted with alkyl containing from 1 to 20 carbons; aryl containing from 5 to 10 carbons; or aryl substituted with alkyl, hydroxy, carboxy, carboalkoxy, nitro, halo, cyano, amino, dialkylamino, acyl, trihalomethyl, or alkylsulfonyl.
- 9. A developer according to claim 8 wherein said carrier is strontium ferrite coated with poly(methylmethacrylate) on a 2 percent weight/weight basis.
- 10. A developer according to claim 8 wherein said carrier is strontium ferrite coated with dehydrofluorinated and oxidized fluorocarbon.
CROSS REFERENCE TO RELATED APPLICATIONS
The present application is related to U.S. Ser. No. 08/644,805 filed on 10 May, 1996 in the names of the present inventors. That application relates to TONER COMPOSITIONS CONTAINING N-(2-CYANOETHENYL) SULFONAMIDES. In that application, the N-(2-cyanoethenyl) sulfonamides are monofunctional.
The present application is also related to U.S. Ser. No. 08/644,757 filed on even date herewith by the same inventors and entitled N-(2-CYANOETHENYL) SULFONAMIDES HAVING TWO FUNCTIONALITIES AND TONER COMPOSITIONS CONTAINING THEM. Like the present application, this related application discloses difunctional compounds but the structure of the charge control agents is different from the structure herein.
US Referenced Citations (9)
Non-Patent Literature Citations (1)
Entry |
W. Schulz et al in Chem. Ber. 100, pp. 2640-2648 (1967). |