Ames negative sublimation toner

Abstract

Provided are toners and combinations of toners that demonstrate excellent color and are Ames test negative in both Salmonella typhimurium strains TA98 and TAIOO.

Claims

1. A yellow, magenta, cyan or black disperse dye-containing toner composition, said toner exhibits a negative Ames Test with strains TA98 and TA100, said toner compositions configured for use in sublimation dye transfer applications.

2. A toner according to claim 1 where the composition further comprises from 80-90 wt % of a polyester polymer binder, and optionally from 1 to 8 wt % wax lubricant, optionally from 1 to 4 wt % charge control agent, optionally from 2 to 12 wt % disperse dye and optionally from 1 to 5 wt % toner surface additives.

3. A toner according to claim 2 where the polyester polymer binder has a molecular weight in the range of 130,000 to 175,000 and Mn of 3000 to 7000.

4. A toner according to claim 2 where the charge control agent comprises 1 to 4 wt % of a zinc complex.

5. A toner according to claim 2 where the internal lubricant comprises 1 to 8 wt % polyolefin, hydrocarbon or ester wax.

6. A toner according to claim 2 where the toner surface additives are selected from the group consisting of silica, alumina, titanium dioxide, acrylic resin particles, zinc stearate, and strontium titanate.

7. A toner according to claim 1 where the disperse dyes are selected from the group consisting of Yellow 54, Yellow 82, Yellow 119, Orange 25, Red 1, Red 4, Red 11, Red 60, Red 364, Violet 17, Blue 14, Blue 19, Blue 60, Blue 72, Blue 359, Blue 360, Brown 26, and combinations thereof.

8. A toner according to claim 1 where the dyes are selected from the group consisting of Yellow 54, Orange 25, Blue 60, Blue 72, Red 60, and Violet 17.

9. A toner according to claim 1 where the toner is a magenta toner comprising from 2 to 6 wt % Red 60 and from 0 to 3 wt % Violet 17.

10. A toner according to claim 1 where the toner is a yellow toner comprising from 1 to 5 wt % Yellow 54.

11. A toner according to claim 1 where the toner is a cyan toner comprising from 0 to 3 wt % Blue 60 and from 0 to 3 wt % Blue 72.

12. A toner according to claim 1 wherein the toner is a black toner comprising from 0 to 0.2 wt % Violet 17, from 1 to 2 wt % Yellow 54, from 1 to 2 wt % Orange 25, and from 5 to 8 wt % Blue 72.

13. A toner according to claim 1 comprising 80-90 wt % of a styrene acrylic polymer binder, and optionally from 1 to 8 wt % wax lubricant, optionally from 1 to 4 wt % charge control agent, optionally from 2 to 12 wt % disperse dye, and optionally form 1 to 5 wt % toner surface additive(s).

14. A toner according to claim 13 where the styrene acrylic resin has a molecular weight of 250,000 to 300,000 and Mn of 3000 to 8000.

15. A toner according to claim 13 where the charge control agent comprises 1 to 4 wt % of a zinc complex.

16. A toner according to claim 13 where the wax lubricant comprises from 1 to 8 wt % polyolefin, hydrocarbon, or ester wax.

17. A toner according to claim 13 where the toner surface additives are selected from the group consisting of silica, alumina, titanium dioxide, acrylic resin particles, zinc stearate, and strontium titanate.

18. A toner according to claim 13 where the disperse dyes are selected from the group consisting of Yellow 54, Yellow 82, Yellow 119, Orange 25, Red 1, Red 4, Red 11, Red 60, Red 364, Violet 17, Blue 14, Blue 19, Blue 60, Blue 72, Blue 359, Blue 360, and Brown 26.

19. A toner according to claim 13 where the disperse dyes are selected from the group consisting of Yellow 54, Orange 25, Blue 60, Blue 72, Red 60, and Violet 17.

20. A toner according to claim 13 where the toner is: a magenta toner comprising from 2 to 6 wt % Red 60 and from 0 to 3 wt % Violet 17; a yellow toner comprising from 1 to 5 wt % Yellow 54; a cyan toner comprising from 0 to 3 wt % Blue 60 and from 0 to 3 wt % Blue 72; or a black toner comprising from 0 to 0.2 wt % Violet 17, from 1 to 2 wt % Yellow 54, from 1 to 2 wt % Orange 25, and from 5 to 8 wt % Blue 72.

Description

EXAMPLES

Example 1

(1) A black toner was prepared by extruding a mixture of 86% polyester resin, 1% colorless zinc complex negative charge control agent, 3% ester wax and a total of 10% of a disperse dye mixture of 2.31% Violet 17, 0.94% Yellow 54, 0.42% Orange 25, 4.69% Blue 14 and 1.64% Red 60 where all percentages are weight percentages. The extruded mixture was jet milled, classified to remove fine particles and appropriate flow and cleaning additives applied to the toner surface for it to function properly in an Oki color printer. The toner gave a positive Ames test for TA 98 with metabolic activation but negative with TA100.

Example 2

(2) A cyan toner was prepared as in example 1 but using 3 wt % Blue 14. This toner was Ames positive with TA 98 strain.

Example 3

(3) A cyan toner was prepared as in example 1 but with 6 wt % dye mixture of 5.4 wt % Blue 60 and 0.6 wt % Blue 72. This toner was Ames positive with TA 98 strain.

Example 4

(4) A cyan toner was prepared as in example 1 but replacing the disperse dyes with 1.5 wt % Blue 72. This toner was Ames negative for both TA 98 and TA 100 strains.

Example 5

(5) A magenta toner was preared as in example 1 but replacing the disperse dyes with 1.5% Violet 17. This toner was Ames negative for both TA 98 and TA 100 strains.

Example 6

(6) A magenta toner was preared as in example 1 but replacing the disperse dyes with 1.5% Red 60. This toner was Ames negative for both TA 98 and TA 100 strains.

Example 7

(7) A yellow toner was premed as in example 1 but replacing the disperse dyes with 1% Yellow 54. This toner was Ames negative for both TA 98 and TA 100 strains.

Example 8

(8) A black toner was prepared by extruding a mixture of 86% polyester resin, 1% colorless zinc complex negative charge control agent, 3% ester wax and a total of 10% of a disperse dye mixture of 2.31% Violet 17, 0.94% Yellow 54, 1% Orange 25, 6.5% Blue 72 where all percentages are weight percentages. The extruded mixture was jet milled, classified to remove fine particles and appropriate flow and cleaning additives applied to the toner surface for it to function properly in an Oki color printer. This toner was Ames negative for both TA 98 and TA 100 strains.

(9) Various modifications of the present invention, in addition to those shown and described herein, will be apparent to those skilled in the art of the above description. Such modifications are also intended to fall within the scope of the appended claims.

(10) It is appreciated that all reagents are obtainable by sources known in the art unless otherwise specified.

(11) Patents, publications, and applications mentioned in the specification are indicative of the levels of those skilled in the art to which the invention pertains. These patents, publications, and applications are incorporated herein by reference to the same extent as if each individual patent, publication, or application was specifically and individually incorporated herein by reference.

(12) The foregoing description is illustrative of particular embodiments of the invention, but is not meant to be a limitation upon the practice thereof. The following claims, including all equivalents thereof, are intended to define the scope of the invention.