METHOD OF FORMING AN ELECTRO-OPTIC MEDIUM
A variable transmission electro-optic medium includes a plurality of electrically charged particles, a charge control agent, and a fluid. The charged particles are movable by application of an electric field. The charge control agent comprises an oligoamine-terminated polyolefin and a branched chain fatty acid comprising at least eight carbon atoms.
1 . A variable transmission electro-optic medium comprising a plurality of electrically charged particles, a charge control agent, and a fluid, the charged particles being movable by application of an electric field, wherein the charge control agent comprises an oligoamine-terminated polyolefin and a branched chain fatty acid comprising at least eight carbon atoms.
2 . The variable transmission electro-optic medium of claim 1 , wherein the oligoamine-terminated polyolefin is an oligoamine-terminated polyisobutylene.
3 . The variable transmission electro-optic medium of claim 1 , wherein the branched chain fatty acid is a 2-alkyl fatty acid comprising at least 12 carbon atoms.
4 . The variable transmission electro-optic medium of claim 3 , wherein the branched chain fatty acid is 2-hexyldecanoic acid.
5 . The variable transmission electro-optic medium of claim 1 , wherein the medium is encapsulated within a plurality of capsules.
6 . A device comprising a layer of the variable transmission electrophoretic medium of claim 1 disposed between two light-transmissive electrodes.