Toner compositions including crosslinked polymer binders

• US 5,968,700 A
• Filed: 01/30/1998
• Issued: 10/19/1999
• Est. Priority Date: 07/28/1995
• Status: Expired due to Fees

• Current Assignee: NEXPRESS SOLUTIONS LLC (Eastman Kodak Company)
• Original Assignee: Eastman Kodak Company
• Inventors: Hadcock, Richard L., Tyagi, Dinesh
• Primary Examiner(s): Rodee, Christopher D.
• Application Number:
  US09/016,065
• Time in Patent Office: 627 Days
• Field of Search: 430/110, 430/109, 430/137, 430/904
• US Class Current: 430/108.23
• CPC Class Codes: G03G 9/08711 with esters of acrylic or methacrylic acid
• CPC Class Codes: G03G 9/08737 Polymers derived from conjugated dienes
• CPC Class Codes: G03G 9/08793 Crosslinked polymers
• CPC Class Codes: G03G 9/09775 containing atoms other than carbon, hydrogen or oxygen G03G9/09741 - G03G9/09766 take precedence

Abstract

There is provided a toner composition which comprises a binder made from (A) a copolymer selected from (1) a vinyl aromatic monomer; a second monomer selected from the group consisting of i) conjugated diene monomers and ii) acrylate monomers selected from the group consisting of alkyl acrylate monomers and alkyl methacrylate monomers; and a third monomer which is a crosslinking agent; and (2) polyesters of aromatic dicarboxylic acids with one or more aliphatic diols; and (B) an alkyl sarcosine or a salt thereof having an alkyl group which contains from about 10 to about 20 carbon atoms.

Claims

1. A toner composition which comprises a binder, wherein said binder comprises:

A) (1) a copolymer containing a vinyl aromatic monomer;

a second monomer selected from the group consisting of I) conjugated diene monomers and ii) acrylate monomers selected from the group consisting of alkyl acrylate monomers and alkyl methacrylate monomers; and

a third monomer which is a crosslinking agent;

or

(2) polyesters of aromatic dicarboxylic acids with one or more aliphatic diols; and

B) an alkyl sarcosine or a salt thereof having an alkyl group which contains from about 10 to about 20 carbon atoms;

wherein said binder has a tetrahydrofuran (THF) insoluble fraction ranging from 5 percent to 75 percent by weight of the entire binder.

2. The toner composition according to claim 1 wherein said composition further comprises a charge control agent.

3. The toner composition according to claim 2 wherein said charge control agent is octadecyl dimethylbenzyl ammonium chloride.

4. The toner composition according to claim 2 wherein said charge control agent is a mixture of dodecylbenzyl dimethyl ammonium 3-nitrobenzene sulfonate and ##STR5##

5. A developer composition comprising the toner according to claim 1 further comprising a carrier.

6. The toner composition according to claim 1 wherein said vinyl aromatic monomer is styrene and said alkyl acrylate monomer is butyl acrylate.

7. The toner composition according to claim 1 wherein said crosslinking agent is divinyl benzene.

8. The toner composition according to claim 1 wherein said alkyl sarcosine or a salt thereof is derived from sodium lauryl sarcosinate.

9. The toner composition according to claim 1 further comprising a colorant.

10. The toner composition according to claim 9 wherein said colorant is carbon.

11. The toner composition according to claim 9 wherein said composition further comprises a charge control agent.

12. The toner composition according to claim 11 wherein said colorant is carbon.

13. The toner composition according to claim 11 wherein said charge control agent is octadecyl dimethylbenzyl ammonium chloride.

14. The toner composition according to claim 11 wherein said charge control agent is a mixture of dodecylbenzyl dimethyl ammonium 3-nitrobenzene sulfonate and

15. A developer composition comprising the toner according to claim 10 further comprising a carrier.

16. The toner composition according to claim 9 wherein said vinyl aromatic monomer is styrene and said alkyl acrylate monomer is butyl acrylate.

17. The toner composition according to claim 9 wherein said crosslinking agent is divinyl benzene.

18. The toner composition according to claim 9 wherein said alkyl sarcosine or a salt thereof is derived from sodium lauryl sarcosinate.

19. The toner composition of claim 1 wherein the dicarboxylic acid is selected from the group consisting of isophthalic and terephthalic acids.

20. The toner composition of claim 1 wherein the aliphatic diol is selected from the group consisting of ethylene glycol, cyclohexane dimethanol and bisphenols.