Wet surface marking jet ink

Disclosed are a jet ink composition and a method for printing on wet glass, PET, and aluminum surfaces under humid conditions messages having good penetration, adhesion and abrasion resistance, said composition comprising an organic solvent, a flexible thermoplastic urethane resin, silicone resin, a silane, and a colorant.

The following example further illustrates the present invention but, of 
course, should not be construed as in any way limiting its scope. 
EXAMPLE 1 
A jet ink composition was prepared by employing the following formulation: 
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Ingredient Percent by weight 
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Methyl ethyl ketone 71.3 
Silicone DC6-2230 (Dow Corning) 
3.0 
Acryloid B-66 (Rohm & Haas) 
5.0 
SURKOPAK Polyurethane 5322 
11.0 
Solvent Black 29 Dye (Ciba-Geigy) 
6.0 
Ethanol CDA-19 200 Proof (EMCO Chemical) 
2.0 
Silane A187 (Union Carbide) 
1.5 
FC 430 10% in MEK (3M Co.) 
0.2 
100.0 
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The above ink formulation was prepared and tested on a wide range of glass, 
PET, and aluminum bottles simulating cold-fill humid conditions. Printer 
runnability testing was also carried out. The jet ink performed 
satisfactorily. 
Images can be printed on a glass, PET, and aluminum surface under humid 
conditions using the jet ink composition of the instant invention by 
projecting a stream of droplets of the ink to the surface and controlling 
the direction of the stream electronically so that the droplets form the 
desired printed image on the surface. 
All of the references, including patents, patent applications, and 
publications, cited herein are hereby incorporated in their entireties by 
reference. 
While this invention has been described with an emphasis upon the preferred 
embodiment, it will be obvious to those of ordinary skill in the art that 
variations of the preferred embodiment may be used and that it is intended 
that the invention may be practiced otherwise than as specifically 
described herein. Accordingly, this invention includes all modifications 
encompassed within the spirit and scope of the invention as defined by the 
following claims.