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US 6,297,296 B1Granted
Latex complexes as stabilized colorant
AssigneeKodak Polychrome Graphics LLC
InventorAllan Wexler
Life of this patent
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Abstract
The invention relates to the use of cationic latex particles that can complex with anionic dyes to provide water fastness and further to provide a medium in which inherently unstable anionic dyes can be brought in close proximity with other anionic components, by complexation to cationic latices, in order to stabilize the anionic dyes especially with regard to light and oxidative degradation. In particular this invention will provide for methods of generating waterfast and improved lightfast ink jet images.
Claims4
A complex comprising:
- a) an anionic dye,
- b) at least one anionic stabilizer, and
- c) a cationic latex;
- wherein amounts of said anionic dye, said anionic stabilizer, and said cationic latex in said complex are determined by having essentially equal or greater amounts of cationic charges from said cationic latex than anionic charges from said anionic dye and said anionic stabilizer and further;
- the ratio of said anionic charges from said anionic dye to said anionic charges from said anionic stabilizer in said complex is in the range of about 1:1000 to about 1000:1.
2 more elements
Dependencies are inferred from the claim text.