US 20140364548Al  c19)  United States  c12)  Patent Application Publication  EVERHARDUS et al.  c10)  Pub. No.: US 2014/0364548 Al  (43)  Pub. Date:  Dec. 11, 2014  (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.  (51)  Int. Cl.  (52)  U.S. Cl.  CPC ................  C09D 11138  (2013.01);  C08K 13/00  (2013.01)  USPC ............................  524/166;  524/377; 524/265  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.  C09D 11138  C08K 13/00  (2006.01)  (2006.01)  Mar. 6, 2012  (EP) .................................. 12158219.1  (30)  Foreign Application Priority Data  Publication Classification  Related U.S. Application Data  (57)  ABSTRACT  • 