Waterfast primary color dyes for ink jet recording fluids

Details Waterfast primary color dyes for ink jet recording fluids Waterfast primary color dyes for ink jet recording fluids

C - Chemistry, Metallurgy

09

D

C09D 11/10 (2006.01) C09D 11/00 (2006.01)

Patent

CA 2176857

An ink jet ink composition comprises a liquid vehicle, a dye, a co-solvent for improved waterfastness, and a branched N-hydroxyalkyl polyethyleneimine polymer substituted at about 80% of the available nitrogens. Alternatively, the N- hydroxyalkyl polyethyleneimine polymer could be replaced with an N-hydroxyalkyl diphenylguanidine substituted at about 80% of the available nitrogens. Additionally, the polyethyleneimine polymer or diphenylguanidine could be epicholorohydrin modified (1-chloro 2,3 epoxypropane) to form the corresponding N-hydroxypropyl derivative. The co- solvent preferably comprises N-methyl-pyrrolidone or N,N-dimethylformamide.

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