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US 11,827,816 B2Granted
Adhesive composition comprising a polyurethane and a cationic dopant
AssigneeE Ink Corporation
InventorsEugene Bzowej, Jonathan Kim Nguyen, David Darrell Miller
Life of this patent
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Abstract
An adhesive composition comprising a polyurethane and a cationic polymeric dopant or a polymerizable cationic dopant may be used to form one or more adhesive layers of electro-optic assemblies. They enable improved electro-optic performance of the corresponding electro-optic devices even at low temperatures.
Claims8
An adhesive composition comprising a polyurethane, and a cationic polymeric dopant, the cationic polymeric dopant being represented by Formula IA,
- wherein
- R1, R2 are independently selected from the group consisting of hydrogen, an alkyl group having a chain with from 1 to 30 carbon atoms, an aryl group, —OH, —SH, —NH2, —NHR1′, and —NR1′R1″;
- R6, R7 are independently alkyl or alkenyl groups having a chain with from 1 to 30 carbon atoms;
- Q1, Q2, are independently selected from the group consisting of ethylene oxide, polyethylene oxide, propylene oxide, polypropylene oxide and mixtures thereof, wherein the polyethylene oxide has from 2 to 100 total ethylene oxide units and the polypropylene oxide has from 2 to 100 propylene oxide units;
- R1′, R1″ are alkyl groups having a chain with from 1 to 30 carbon atoms;
- the number average molecular weight of the cationic part of the cationic polymeric dopant is from about 400 Daltons to about 25,000 Daltons;
- Yn− is a counter ion, which is multi-atom anion comprising at least two fluorine atom;
- wherein n is from 1 to 6;
- and
- the adhesive composition is aqueous.
7 more elements
Dependencies are inferred from the claim text.