FR2392407A1 - Stable colloidal suspension for light valves - contg. ester of aromatic alcohol and polymer e.g. nitrocellulose as suspension medium - Google Patents

Stable colloidal suspension for light valves - contg. ester of aromatic alcohol and polymer e.g. nitrocellulose as suspension medium

Info

Publication number
FR2392407A1
FR2392407A1 FR7715691A FR7715691A FR2392407A1 FR 2392407 A1 FR2392407 A1 FR 2392407A1 FR 7715691 A FR7715691 A FR 7715691A FR 7715691 A FR7715691 A FR 7715691A FR 2392407 A1 FR2392407 A1 FR 2392407A1
Authority
FR
France
Prior art keywords
suspension
ester
polymer
nitrocellulose
contg
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR7715691A
Other languages
French (fr)
Other versions
FR2392407B1 (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Research Frontiers Inc
Original Assignee
Research Frontiers Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Research Frontiers Inc filed Critical Research Frontiers Inc
Priority to FR7715691A priority Critical patent/FR2392407A1/en
Publication of FR2392407A1 publication Critical patent/FR2392407A1/en
Application granted granted Critical
Publication of FR2392407B1 publication Critical patent/FR2392407B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/17—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on variable-absorption elements not provided for in groups G02F1/015 - G02F1/169
    • G02F1/172—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on variable-absorption elements not provided for in groups G02F1/015 - G02F1/169 based on a suspension of orientable dipolar particles, e.g. suspended particles displays

Abstract

A liquid suspension comprises particles which can react in an electrical field to modify the transmission of radiation through the suspension and, as dispersion medium, an ester derived from an aromatic alcohol and a polymer contg. functional gps. (pref. COOH) or its chain. The suspension is stable when an electrical field is applied to it. It can transmit at least twice the amt. of light than in the absence of an electrical field. Used in light valves. The aromatic ester is pref. an alkyl-aryl ester, esp. an aromatic acetate, e.g. (m)ethyl-phenyl-, propyl-phenyl acetate etc. The polymer is either nitrocellulose or a copolymer, e.g. 3,5,5-trimethylhexylacrylate/bis-2-ethylhexylfumarate/2-hydroxypr- opylacrylate/fumaric acid copolymer and bis-2-ethylhexyl fumarate/3,5,5-trimethylhexylactate/vinylidene chloride/mesaconic acid copolymer.
FR7715691A 1977-05-23 1977-05-23 Stable colloidal suspension for light valves - contg. ester of aromatic alcohol and polymer e.g. nitrocellulose as suspension medium Granted FR2392407A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7715691A FR2392407A1 (en) 1977-05-23 1977-05-23 Stable colloidal suspension for light valves - contg. ester of aromatic alcohol and polymer e.g. nitrocellulose as suspension medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7715691A FR2392407A1 (en) 1977-05-23 1977-05-23 Stable colloidal suspension for light valves - contg. ester of aromatic alcohol and polymer e.g. nitrocellulose as suspension medium

Publications (2)

Publication Number Publication Date
FR2392407A1 true FR2392407A1 (en) 1978-12-22
FR2392407B1 FR2392407B1 (en) 1983-11-10

Family

ID=9191168

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7715691A Granted FR2392407A1 (en) 1977-05-23 1977-05-23 Stable colloidal suspension for light valves - contg. ester of aromatic alcohol and polymer e.g. nitrocellulose as suspension medium

Country Status (1)

Country Link
FR (1) FR2392407A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2090021A1 (en) * 1970-04-07 1972-01-14 Marks Alvin
US3980602A (en) * 1975-02-28 1976-09-14 E. I. Du Pont De Nemours And Company Acrylic polymer dispersant for aqueous acrylic coating compositions
US4009937A (en) * 1975-09-08 1977-03-01 Owens-Illinois, Inc. Multiplex addressing of colloidal light valves
AU492043B1 (en) * 1974-12-06 1977-05-19 Ici Australia Limited Dispersant derived from the reaction of an oligomer of hydroxycarboxylic acid with an acrylic copolymer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2090021A1 (en) * 1970-04-07 1972-01-14 Marks Alvin
AU492043B1 (en) * 1974-12-06 1977-05-19 Ici Australia Limited Dispersant derived from the reaction of an oligomer of hydroxycarboxylic acid with an acrylic copolymer
US3980602A (en) * 1975-02-28 1976-09-14 E. I. Du Pont De Nemours And Company Acrylic polymer dispersant for aqueous acrylic coating compositions
US4009937A (en) * 1975-09-08 1977-03-01 Owens-Illinois, Inc. Multiplex addressing of colloidal light valves

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
EXBK/75 *

Also Published As

Publication number Publication date
FR2392407B1 (en) 1983-11-10

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