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# c19) United States c12) Patent Application Publication 

# EVERHARDUS et al. 

# (54) INK COMPOSITION 

(71) Applicant: OCE-TECHNOLOGIES B.V., Venlo (NL) 

(72) Inventors: Roelof H. EVERHARDUS, Lonnn (NL); Gerardus C. P. VERCOULEN, Velden (NL); Johannes F. J. VAN GAGELDONK, Venlo (NL); Johan P. J. LENDERS, Leveroy (NL); Antonius P. M. M. VAN ROY, Grashoek (NL) 

(21) Appl. No.: 14/465,917 

(22) Filed: Aug. 22, 2014 

(63) Continuation of application No. PCT/EP2013/ 054432, filed on Mar. 5, 2013. 

## (30) Foreign Application Priority Data 

<img src='content_image/936661.jpg'>

(51) Int. Cl. 

<img src='content_image/936660.jpg'>

## Related U.S. Application Data 

## Publication Classification 

<img src='content_image/936644.jpg'>

<img src='content_image/936666.jpg'>

(52) U.S. Cl. CPC ................ C09D 11138 (2013.01); C08K 13/00 (2013.01) 

## (57) ABSTRACT 

The present invention relates to an ink composition suitable for being ejected from an inkjet marking device at an operat› ing temperature. The ink composition comprises a water› dispersible resin and has a dynamic surface tension of below 35 mN/m and a static surface tension of above 21 mN/m both determined at the operating temperature. The ink composi› tion may comprise a mixture of water-soluble organic sol› vents having a difference in the relative dielectric constant of more than 5, preferably between 10 and 50. The ink compo› sition may comprise a polymeric cosolvent, in particular a polyethylene glycol or polyethylene glycol ( di)methyl ether. The ink composition may comprise a mixture of surfactants comprising at least one surfactant of a first type selected from the group consisting of acetylene glycols and ethoxylated acetylene glycols and at least one surfactant of a second type selected from the group consisting of silicone surfactants and fluorochemical surfactants. 

US 20140364548Al 

# c10) Pub. No.: US 2014/0364548 Al 

# (43) Pub. Date: Dec. 11, 2014 

USPC ............................ 524/166; 524/377; 524/265 

