Solid gel electrolytic material for modulating light

• US 5,332,530 A
• Filed: 08/31/1992
• Issued: 07/26/1994
• Est. Priority Date: 11/29/1991
• Status: Expired due to Fees

• Current Assignee: Corning Incorporated
• Original Assignee: Corning Incorporated
• Inventors: Marque, Pascal J. J., Eid, Bernard A. G.
• Primary Examiner(s): TUCKER, PHILIP C
• Application Number:
  US07/937,168
• Time in Patent Office: 694 Days
• Field of Search: 252/583, 252/586, 359/265, 359/270, 359/275, 359/322, 429/188
• US Class Current: 252/583
• CPC Class Codes: C09K 9/00 Tenebrescent materials, i.e. materials for which the range of wavelengths for energy absorption is changed as a result of excitation by some form of energy
• CPC Class Codes: G02F 1/1508 using a solid electrolyte
• CPC Class Codes: G02F 2202/02 organic material

Abstract

This invention concerns an electrolytic material in the form of a solid gel for the modulation of light comprising a homogeneous mixture of:

(A) at least one organic solvent;

(B) at least one salt of an electrodepositable metal;

( C ) at least one organic acid; and

(D) at least one salt of a non-electrodepositable metal that facilitates the solubilization of metal salt (B);

characterized in that it comprises in addition:

(E) at least one agent gelling said mixture to a non-flowing, transparent, solid gel state.

Claims

1. An electrolytic material in the form of a solid gel for the modulation of light comprising a homogeneous mixture of:

(A) at least one organic solvent;

(B) at least one salt of an electrodepositable metal;

(C) at least one organic acid; and

(D) at least one salt of a non-electrodepositable metal that facilitates the solubilization of metal salt (B);

characterized in that it comprises in addition;

(E) at least one agent gelling said mixture to a non-flowing, transparent, solid gel state.

2. An electrolytic material according to claim 1 characterized in that constituent (E) is comprised of at least one polymer with thickening properties.

3. A electrolytic material according to claim 2 characterized in that the polymer with thickening properties is chosen from the group of methyl polymethacrylate, polyvinylbutyral, polyvinylidene fluoride, and mixtures thereof.

4. An electrolytic material according to claim 1 comprising an organic solvent (A) which is a polyhydroxyl compound characterized in that the constituent (E) is an alcoholate of a transition metal.

5. An electrolytic material according to claim 4 characterized in that the alcoholate is titanium n-butylate or aluminum di(s-butylate).

6. An electrolytic material according to claim 1 characterized in that the salt of metal (B) is chosen from the group consisting of zinc, cadmium, lead, silver, copper, iron, nickel, tin, indium, platinum, palladium, gold, bismuth, antimony, tellurium, manganese, thallium, selenium, gallium, arsenic, mercury, chromium, tungsten, and molybdenum.

7. An electrolytic material according to claim 6 characterized in that salt (B) is selected from the group consisting of a salt of bismuth, a salt of copper (I), and a mixture of both.

8. An electrolytic material according to claim 6 characterized in that salt (B) is at least one halide selected from the group consisting of chloride, bromide, and iodide.

9. An electrolytic material according to claim 7 characterized in that salt (B) is at least one halide selected from the group of chloride, bromide, and iodide.

10. An electrolytic material according to claim 1 characterized in that acid (C) is selected from the group consisting of acetic acid, propionic acid, levulinic acid, and mixtures thereof.

11. An electrolytic material according to claim 1 characterized in that salt (D) is a salt of an alkali metal or an alkaline earth metal whose anion complexes with the electrodepositable metal.

12. An electrolytic material according to claim 11 characterized in that salt (D) is at least one halide selected from the group of chloride, bromide, and iodide.

13. An electrolytic material according to claim 12 characterized in that salt (D) is lithium bromide.

14. An electrolytic material according to claim 1 characterized in that it contains ingredients (A) through (D) in the following proportions in weight percent with respect to the total weight of ingredients (A) through (D):

(A)=10-60%

(B)=0.01% to the saturation limit

(c)=30-80%

(D)=0.01% to the saturation limit.

15. An electrolytic material according to claim 2 characterized in that it contains 5-30% by weight, with respect to the total of the mixture of ingredients (A) through (E), of polymer (E).

16. An electrolytic material according to claim 3 characterized in that it contains 5-30% by weight, with respect to the total of the mixture of ingredients (A) through (E), of polymer (E).

17. An electrolytic material according to claim 4 characterized in that it contains 15-60% by weight, with respect to the total of the mixture of ingredients (A) through (E), of alcoholate (E).

18. An electrolytic material according to claim 5 characterized in that it contains 15-60% by weight, with respect to the total of the mixture of ingredients (A) through (E), of alcoholate (E).

19. An electrooptic device comprising a cathode of a transparent material and an anode spaced therefrom which are coated on their interior facing sides with an electrically conducting layer, the space between the anode and the cathode being filled with an electrolytic material in the state of a solid gel such as defined in claim 1.