Low structure carbon black and method of making same

Patent metadata

Field	Value
Publication number	US-9217944-B2
Application number	US-201313836735-A
Country	US
Kind code	B2
Filing date	Mar 15, 2013
Priority date	Apr 24, 2007
Publication date	Dec 22, 2015
Grant date	Dec 22, 2015

Abstract

A carbon black having an I 2 number from 30 mg/g to 200 mg/g and a DBP from 20 cc/100 g to 40 cc/100 g.

First claim

What is claimed is:

1. A toner composition comprising at least a first carbon black, the first carbon black having an I 2 number from 30 mg/g to 200 mg/g, a DBP from 20 cc/100 g to 39 cc/100 g, an M-ratio of from 1 to less than 1.24, and a concentration of Group IA and IIA elements, in gg/g, of at most y+(15*I 2 number), wherein y is 250.

2. The toner composition of claim 1 , wherein the first carbon black is characterized by at least one of the following:
the carbon black has a water spreading pressure of at most 6 mJ/m 2 ,
the carbon black has a pH from 6 to 10,
the carbon black has a tint obeying the equation tint=x+0.44*I 2 number, where x is from 45 to 90, or
the carbon black has a tint of at least 80.

3. The toner composition of claim 2 , wherein the toner composition comprises a second carbon black.

4. The toner composition of claim 3 , wherein the second carbon black differs from the first carbon black in one or more of surface area, structure, primary particle size, alkali and/or alkaline earth concentration, pH, Spectronic 20 value, tint, or a surface concentration of oxygen-containing groups.

5. The toner composition of claim 3 , wherein the second carbon black is an oxidized carbon black, a heat treated carbon black, or a modified carbon black comprising an attached organic group.

6. The toner composition of claim 1 , wherein the first carbon black has an M-ratio of from 1 to less than 1.22.

7. A toner composition comprising at least a first carbon black, the first carbon black having an I 2 number from 30 mg/g to 200 mg/g, a DBP from 20 cc/100 g to 39 cc/100 g, and a concentration of Group IA and IIA elements, in μg/g, of at most y+(15*I 2 number), wherein y is 250.

8. The toner composition of claim 7 , wherein the first carbon black is characterized by at least one of the following:
the carbon black has a pH from 6 to 10,
the carbon black has an M-ratio of from 1 to less than 1.24,
the carbon black has a water spreading pressure of at most 6 mJ/m 2 ,
the carbon black has a tint obeying the equation tint=x+0.44*I 2 number, where x is from 45 to 90, or
the carbon black has a tint of at least 80.

9. The toner composition of claim 8 , wherein the toner composition comprises a second carbon black.

10. The toner composition of claim 9 , wherein the second carbon black differs from the first carbon black in one or more of surface area, structure, primary particle size, alkali and/or alkaline earth concentration, pH, Spectronic 20 value, tint, or a surface concentration of oxygen-containing groups.

11. The toner composition of claim 9 , wherein the second carbon black is an oxidized carbon black, a heat treated carbon black, or a modified carbon black comprising an attached organic group.

12. The toner composition of claim 8 , wherein the first carbon black has an M-ratio of from 1 to less than 1.22.

13. A toner composition comprising at least a first carbon black, the first carbon black having an I 2 number from 30 mg/g to 200 mg/g, a DBP from 20 cc/100 g to 39 cc/100 g, and an M-ratio of from 1 to less than 1.24.

14. The toner composition of claim 13 , wherein the first carbon black is characterized by at least one of the following:
the carbon black has a concentration of Group IA and IIA elements, in μg/g, of at most y+(15*I 2 number), wherein y is 250,
the carbon black has a pH from 6 to 10,
the carbon black has a water spreading pressure of at most 6 mJ/m 2 ,
the carbon black has a tint obeying the equation tint=x+0.44*I 2 number, where x is from 45 to 90, or
the carbon black has a tint of at least 80.

15. The toner composition of claim 14 , wherein the toner composition comprises a second carbon black.

16. The toner composition of claim 15 , wherein the second carbon black differs from the first carbon black in one or more of surface area, structure, primary particle size, alkali and/or alkaline earth concentration, pH, Spectronic 20 value, tint, or a surface concentration of oxygen-containing groups.

17. The toner composition of claim 16 , wherein the second carbon black is an oxidized carbon black, a heat treated carbon black, or a modified carbon black comprising an attached organic group.

18. The toner composition of claim 13 , wherein the first carbon black has a M-ratio of from 1 to less than 1.22.

Assignees

• Cabot Corp

Inventors

• Belmont James A
• Moeser Geoffrey
• Korchev Andriy
• Kyrlidis Agathagelos
• Huffman Jeremy

Classifications

• C09C1/48 Primary

  Carbon black · CPC title

• C09C1/50

  Furnace black {; Preparation thereof (separation or recovery C09C1/487)} · CPC title

• C01P2006/19

  Oil-absorption capacity, e.g. DBP values · CPC title

• C09C1/56

  Treatment of carbon black {; Purification} · CPC title

• C09C1/565

  comprising an oxidative treatment with oxygen, ozone or oxygenated compounds, e.g. when such treatment occurs in a region of the furnace next to the carbon black generating reaction zone · CPC title