EP0156615A2
Expired / Lapsed
EP
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Liquid crystal composition, method and apparatus
Assignee: Taliq Corp
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Filing: 1985-03-19
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Granted: —
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Expires: 2005-03-19
Abstract
Abstract Method for making a latex entrapped nematic curvilinearly aligned phases liquid crystal composition and apparatus utilizing such composition wherein the liquid crystal material is dispersed in a latex medium. Such a composition may be made by emulsifying liquid crystal material in the presence of a suspension of latex particles or, alternatively, by combining a suspension of latex particles with an emulsion of liquid crystal material.
Inventors
- 👤 Kenneth N. Pearlman
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 13:51
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/52; C09K19/54; C09K19/542; C09K19/544
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
76 words
A method of making latex entrapped liquid crystal comprising mixing at least latex and a liquid crystal material to form a latex medium wherein said liquid crystal material is dispersed therein such that said latex medium induces a generally distorted alignment of said liquid crystal material which in response to said alignment at least one of scatters and absorbs light and which in response to a prescribed input reduces the amount of such scattering or absorption.
Claim 2
Independent Claim
76 words
A method of making latex entrapped liquid crystal comprising mixing at least latex and a liquid crystal material to form a latex medium wherein said liquid crystal material is dispersed therein such that said latex medium induces a generally distorted alignment of said liquid crystal material which in response to said alignment at least one of scatters and absorbs light and which in response to a prescribed input reduces the amount of such scattering or absorption.
Claim 3
Independent Claim
42 words
A method of making latex entrapped liquid crystal comprising: mixing a liquid crystal material and an aqueous phase to form a liquid crystal emulsion, and combining said liquid crystal emulsion with a suspension that includes latex particles suspended in an aqueous phase.
Claim 4
Independent Claim
42 words
A method of making latex entrapped liquid crystal comprising: mixing a liquid crystal material and an aqueous phase to form a liquid crystal emulsion, and combining said liquid crystal emulsion with a suspension that includes latex particles suspended in an aqueous phase.
Claim 5
Dependent Claim
76 words
A method according to claim 2 wherein the amount of said liquid crystal is from about 30% to about 60% of the volume of said liquid crystal emulsion, and the amount of said suspension is about 1 to 3 times the volume of said liquid crystal emulsion, and said suspension contains latex particles about 20% to about 60% of the volume thereof where said latex particles have diameters from about 0.01 microns to about 1.0 microns.
Claim 6
Independent Claim
26 words
A method of making latex entrapped liquid crystal comprising: combining liquid crystal material and latex particles in an aqueous phase; and emulsifying said liquid crystal material.
Claim 7
Independent Claim
26 words
A method of making latex entrapped liquid crystal comprising: combining liquid crystal material and latex particles in an aqueous phase; and emulsifying said liquid crystal material.
Claim 8
Dependent Claim
70 words
A method according to claim 2,3, or 4, further comprising adding a surfactant and/or a protective colloid to said liquid crystal emulsion, the amount of said surfactant being about 0.1 wt. % to about 6 wt. % of the weight of said liquid crystal emulsion and the amount of said protective colloid being about 1 wt. % to about 10 wt. % of the weight of said liquid crystal emulsion.
Claim 9
Independent Claim
20 words
A method according to any preceding claim further including adding a cross-linking producing material to effect cross-linking of said latex.
Claim 10
Independent Claim
40 words
A method of making a latex entrapped liquid crystal comprising combining latex and a liquid crystal material to form a latex containment medium and utilizing a cross-linking producing material to effect cross-linking of said latex of said latex containment medium.
Claim 11
Independent Claim
40 words
A method of making a latex entrapped liquid crystal comprising combining latex and a liquid crystal material to form a latex containment medium and utilizing a cross-linking producing material to effect cross-linking of said latex of said latex containment medium.
Claim 12
Dependent Claim
57 words
A composition comprising a latex medium and liquid crystal material dispersed in said medium wherein said medium induces a generally distorted alignment of said liquid crystal material which in response to said alignment at least one of scatters and absorbs light and which in response to a prescribed input reduces the amount of such scattering or absorption.
Claim 13
Dependent Claim
57 words
A composition comprising a latex medium and liquid crystal material dispersed in said medium wherein said medium induces a generally distorted alignment of said liquid crystal material which in response to said alignment at least one of scatters and absorbs light and which in response to a prescribed input reduces the amount of such scattering or absorption.
Claim 14
Independent Claim
27 words
A method or composition according to any preceding claim, wherein the liquid crystal material comprises particles having a diameter of about 1 micron to about 10 microns.
Claim 15
Dependent Claim
55 words
A liquid crystal apparatus, comprising a liquid crystal material and a latex containment medium for inducing a generally distorted alignment of said liquid crystal material which in response to such alignment at least one of scatters and absorbs light and which in response to a prescribed input reduces the amount of such scattering and absorption.
Claim 16
Dependent Claim
55 words
A liquid crystal apparatus, comprising a liquid crystal material and a latex containment medium for inducing a generally distorted alignment of said liquid crystal material which in response to such alignment at least one of scatters and absorbs light and which in response to a prescribed input reduces the amount of such scattering and absorption.
Claim 17
Dependent Claim
41 words
A liquid crystal apparatus according to claim 10 wherein said latex containment medium forms discrete curved volumes containing discrete quantities of said liquid crystal material, and said generally distorted alignment comprises alignment at least partially paralleling the curvature of said volumes.
Claim 18
Independent Claim
32 words
A method, composition or apparatus according to any preceding claim, wherein said latex particles comprise polyethylenes, polypropylenes, polyurethanes, polyacrylics or polysiloxanes or are copolymers comprising methacrlyate-acrylo-nitriles, urethane-acrylics, acrylate-acrylonitriles, styrene-acrylontriles, or vinylidene chloride-acrylo-nitriles.
Claim 19
Dependent Claim
34 words
13 . A method, composition or apparatus according to any preceding claim, wherein said liquid crystal material and said latex medium have substantially matched indices of refraction in the presence of said prescribed input.
Claim 20
Independent Claim
64 words
A method, composition or apparatus according to any preceding claim, wherein said latex medium has a dielectric constant which is greater than the dielectric coefficient of said liquid crystal material in the absence of an electric field and wherein said latex medium has a dielectric constant substantially matching the extraordinary dielectric coefficient of said liquid crystal material in the presence of an electric field.
Claim 21
Independent Claim
48 words
A method, composition or apparatus according to any preceding claim, wherein said liquid crystal material and said latex have substantially related dielectric constants in the presence of an electric field such that there is a greater voltage drop across said liquid crystal material then across said latex medium.
References Cited (Backward Citations)
No citation records indexed.
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