Phase-change ink composition

The phase change ink composition comprises silica as nucleating agent particles having a particle size from 10 tolOO nm. ... 

Radiation curable phase change ink compositions with a radiation curable fluorescent comonomer and a gellant have been described (49). These compositions offer both document security features as well as potential brand highlight features. 

S.F. Toosi, M.M. Birau, B.E. Abraham, G. Iftime, J.D. Mayo, and C.G. Allen, Phase change ink composition and process for preparing same, US Patent Application 20140176652, assigned to Xerox Corporation, Norwalk (CT), June 26, 2014. 

D.R. Titterington, L.V. Bui, L.M. Hirschy, and H.R. Frame, Indirect printing process for applying selective phase change ink compositions to substrates, US Patent 5372852, assigned to Tektronix, Inc. (Wilsonville, OR), December 13,1994. 

Hara et al. [677] studied the effect of changing the mobile phase composition on the retention of 10 fat-soluble vitamins (e.g., Ini 5-retinol, retinal, ergocalciferol, cholecalciferol, menadione, phylloquinone). A silica column (2 —254nm or 292 nm) was used. The ethyl acetate level in hexane was systematically changed from 5% to 20% and the results were plotted in a Ink vs. percent ethyl acetate format. As expected, when the percent ethyl acetate increased, the overall retention of the analytes decreased. Interesting, however, was the fact that the changes in retention of both menadione and retinal were so different from the other analytes (e.g., a-, P-, y-, and -tocopherol) that reversals in retention order occurred. These data present an excellent basis from which to develop a new method for fat-soluble vitamins. 

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