THERMOPLASTIC ELECTROCHROMIC MATERIALS
First Claim
Patent Images
1. A composition comprising:
- (a) 10-60 wt % of a polymer selected from the group of amorphous, film-forming polymers with Tg less than 100°
C.;
(b) 45-70 wt % of a plasticizer, wherein the plasticizer is soluble in the polymer to at least 45 wt %;
(c) 1-30 wt % of an electrochromophore, wherein the electrochromophore is soluble in the plasticizer to at least 10 wt %;
(d) 0.1-10 wt % of an electron mediator selected from the group consisting of ferrocene, butyl ferrocene, ferrocene carboxylic acid, phenazine and its derivatives, carbazole and its derivatives, phenothiazine and its derivatives, and phenanthroline and its derivatives; and
(e) 0.1-10 wt % of a salt selected from the group consisting of lithium chloride, tetrabutylammonium bromide, lithium bis(trifluoromethanesulfonyl)imide, lithium triflate, and lithium hexafluorophosphate,wherein the melting point of the plasticizer is not above about 0°
C., the boiling point of the plasticizer is above about 190°
C. at a pressure of 1 atmosphere, and the solubility in the plasticizer of the electrochromophore, the electron mediator and the salt are each at least 0.05 mg per mg of plasticizer.
1 Assignment
0 Petitions
Accused Products
Abstract
Disclosed are electrochromic materials containing a film-forming polymer with a Tg less than 100° C.; a plasticizer; an electrochromophore; an electron mediator; and a salt. Also disclosed are electrochromic devices using such electrochromic materials that can provide light-filtering, color-modulation, or reflectance-modulation in variable transmittance windows, variable-reflectance mirrors and other dynamic glazing applications.
-
Citations
6 Claims
-
1. A composition comprising:
-
(a) 10-60 wt % of a polymer selected from the group of amorphous, film-forming polymers with Tg less than 100°
C.;(b) 45-70 wt % of a plasticizer, wherein the plasticizer is soluble in the polymer to at least 45 wt %; (c) 1-30 wt % of an electrochromophore, wherein the electrochromophore is soluble in the plasticizer to at least 10 wt %; (d) 0.1-10 wt % of an electron mediator selected from the group consisting of ferrocene, butyl ferrocene, ferrocene carboxylic acid, phenazine and its derivatives, carbazole and its derivatives, phenothiazine and its derivatives, and phenanthroline and its derivatives; and (e) 0.1-10 wt % of a salt selected from the group consisting of lithium chloride, tetrabutylammonium bromide, lithium bis(trifluoromethanesulfonyl)imide, lithium triflate, and lithium hexafluorophosphate, wherein the melting point of the plasticizer is not above about 0°
C., the boiling point of the plasticizer is above about 190°
C. at a pressure of 1 atmosphere, and the solubility in the plasticizer of the electrochromophore, the electron mediator and the salt are each at least 0.05 mg per mg of plasticizer.- View Dependent Claims (2, 3, 4, 5, 6)
-
-
4. The composition of claim 1, wherein the plasticizer is selected from the group consisting of propylene carbonate;
- 4-(hydroxymethyl)-1,3-dioxolan-2-one;
carbonic acid dibutyl ester;
1-(3-hydroxypropyl)-2-pyrrolidone;
1-octyl-2-pyrrolidone;
5-dodecanolide;
1-hexyl-3-methylimidazolium chloride;
1-methyl-3-octylimidizolium chloride;
2,2-dimethyl-1,3-hexanediol;
2-methyl-1,3-pentanediol;
1-cyclohexyl-2-methyl-1,3-pentanediol;
2,4-diethyl-1,5-pentanediol;
1,3-nonanediol;
2-butyl-1,3-octanediol;
3-methylpentane-1,3,5-triol;
2-ethyl-1,3-hexanediol;
benzyl alcohol;
3-methyl-1,5-pentanediol;
1-phenoxy-2-propanol;
2-(2-butoxyethoxy)ethanol;
bis(2-ethylhexyl)phosphate;
tributyl phosphate; and
tris(2-ethylhexyl)phosphate.
- 4-(hydroxymethyl)-1,3-dioxolan-2-one;
-
5. The composition of claim 1, wherein the electrochromophore is a copolymer of 4-4′
- -dipyridyl and poly(ethylene glycol).
-
6. The composition of claim 5, wherein poly(ethylene glycol) has a molecular weight of about 100 to about 2000 Daltons.
Specification