Surfactants with a terminal dialkyl- or cycloalkyl-substituted tertiary amine and inks including the same
AssigneeHewlett-Packard Development Company, L.P.
InventorsZhang-Lin Zhou, Qin Liu, Mary Elizabeth Parent
Life of this patent
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Abstract
Surfactants are provided that have a hydrophobic tail portion and a hydrophilic head portion. The hydrophilic head portion includes a terminal dialkyl-substituted tertiary amine or a terminal cycloalkyl-substituted tertiary amine. Also provided are pigment-based inks employing the surfactant, a combination of an electronic display and the pigment-based inks, and a process for reducing conductivity in primary amine-based surfactants and improving reliability of electronic inks employing such surfactants.
Claims20
A surfactant having a structure selected from the group consisting of:
- wherein
- the letters R1 to R2 each independently represent an optionally substituted alkyl, alkenyl, aryl or aralkyl groups;
- the letter m is an integer from 1 to 6 for structure I, and the letter m is an integer from 0 to 6 for structures II-VI;
- the letter n is an integer from 5 to 500;
- and
- the letter p is an integer from 1 to 6.
A surfactant having a structure selected from the group consisting of:
- wherein
- the letter m is an integer from 1 to 6 for structures 1-4, and the letter m is an integer from 0 to 6 for structures 5-27;
- and
- the letter n is an integer from 5 to 500.
Dependencies are inferred from the claim text.