Jetting-out performance

When an aqueous type ink composition uses water as the principal solvent, thickening and coloring material deposition may occur in the vicinity of the nozzles due to the evaporation of the water from the ink composition (15). Then problems are encountered in that the ink composition jetting-out performance becomes bad, particularly, the intermittent jetting-out performance becomes bad. 

In order to suppress the lowering of the intermittent jetting-out performance, aqueous type ink compositions containing acetylene glycol or a decaglycerol fatty acid ester have been proposed. 

Basically, the polyglycerol ethers are oligo ethers from glycerol, where the hydroxyl groups in the 1 and 3 position of the glycerol moiety is etherified. The enzymatic synthesis of polyglycerol fatty acid esters as a transesterification from the fatty methyl esters has been described (16). Lipozyme is used as catalyst and no solvent is needed. 

Hexaglyceryl myristate Decaglyceryl myristate Hexaglyceryl oleate Decaglyceryl oleate Hexaglyceryl laurate Decaglyceryl laurate Decaglyceryl stearate 

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