US3969264A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cholesteric liquid crystal water base ink
Assignee: LIQUID CRYSTAL TECHNOLOGY Inc A CORP OF DE
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Filing: 1973-12-17
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Granted: 1976-07-13
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Expires: 1993-12-17
Abstract
Abstract Thin stable, substantially uniform, liquid crystal containing films are provided by coating onto an inert, normally darkened substrate, an ink comprising an oil in water latex, a small amount of an organic solvent, usually a polar moderately water soluble organic solvent, liquid crystals and a thickening agent. The film can be used as an ornamental article of manufacture, for photographic reproduction, for temperature determination, as well as other utilitarian applications.
Inventors
- 👤 Frederick Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:12
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/72; G03C1/73; B; B29; B29C; B29C51/00; B29C51/14; C; C09; C09D; C09D11/00; C09K; C09K19/00; C09K19/52; C09K19/54; C09K19/542; C09K19/544; G01; G01K; G01K11/00; G01K11/12; G01K11/16; G01K11/165
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
103 words
A composition useful in the formation of liquid crystal films which comprises: a thick oil in water emulsion having from 30 to 80 weight percent solids of which 25-75 weight percent is a cholesteric liquid crystal composition and 75-25 weight percent respectively is a transparent latex film-forming polymer; from 20-70 weight percent liquid, having water in from 40-75 weight percent and a moderately water soluble organic solvent having a boiling point less than about 150°C for said liquid crystal composition in from 25-60 weight percent; and a small but sufficient amount of a thickening agent to provide the desired viscosity for film forming.
Claim 2
Dependent Claim
103 words
A composition useful in the formation of liquid crystal films which comprises: a thick oil in water emulsion having from 30 to 80 weight percent solids of which 25-75 weight percent is a cholesteric liquid crystal composition and 75-25 weight percent respectively is a transparent latex film-forming polymer; from 20-70 weight percent liquid, having water in from 40-75 weight percent and a moderately water soluble organic solvent having a boiling point less than about 150°C for said liquid crystal composition in from 25-60 weight percent; and a small but sufficient amount of a thickening agent to provide the desired viscosity for film forming.
Claim 3
Dependent Claim
97 words
A composition according to claim 1, wherein said solids content is in the range of 35-60 weight percent, said liquid crystal composition is present in from 40-65 weight percent of said solids content, said polymer is present in from 35-60 weight percent respectively; said liquid content is present in from 40-65 weight percent, with water present in from 45-75 weight percent and organic solvent present in from 25-55 weight percent of said liquid content; said thickener is present in from 0.1 to 2 weight percent, and including from 0.1 to 2 weight percent of a wetting agent.
Claim 4
Dependent Claim
34 words
A composition according to claim 2, wherein said polymer is an acrylic polymer, said solvent is an oxygenated solvent of from 3 to 6 carbon atoms, and said wetting agent is a nonionic emulsifier.
Claim 5
Dependent Claim
34 words
A composition according to claim 2, wherein said polymer is a chlorovinyl polymer, said solvent is an oxygenated solvent of from 3 to 6 carbon atoms, and said wetting agent is a nonionic emulsifier.
Claim 6
Dependent Claim
80 words
A liquid crystal composition for forming films of liquid crystals which is a thick oil in water emulsion comprising: 35-60 weight percent solids, of which 45-55 weight percent is a cholesteric liquid crystal composition and 45-55 weight percent is a transparent acrylic latex film-forming polymer; 40-65 weight percent liquid of which 50-70 weight percent is water and 30-50 weight percent is methyl ethyl ketone; and 0.5 to 1.5 weight percent of the total composition of a carboxyvinyl polymeric thickening agent.
Claim 7
Dependent Claim
80 words
A liquid crystal composition for forming films of liquid crystals which is a thick oil in water emulsion comprising: 35-60 weight percent solids, of which 45-55 weight percent is a cholesteric liquid crystal composition and 45-55 weight percent is a transparent acrylic latex film-forming polymer; 40-65 weight percent liquid of which 50-70 weight percent is water and 30-50 weight percent is methyl ethyl ketone; and 0.5 to 1.5 weight percent of the total composition of a carboxyvinyl polymeric thickening agent.
Claim 8
Dependent Claim
21 words
A composition according to claim 5, having from 0.2 to 4 weight percent of the total composition of a nonionic emulsifier.
Claim 9
Independent Claim
127 words
A method for forming a film-forming liquid crystal composition containing emulsion which comprises: adding to a latex of a transparent film-forming polymer having from about 30-95 weight percent water, a solution of a cholesteric liquid crystal composition in a moderately water soluble organic solvent having a boiling point less than about 150°C, said solution having a sufficient amount of a thickening agent to provide a final concentration of from about 0.1 to 2 weight percent of the total composition, said liquid crystal composition being present in amount to provide from about 25-75 weight percent of the total solids content, wherein said solution is at a temperature in the range of about 40°-100°C, and stirring the resulting mixture for a time sufficient to provide a substantially uniform composition.
Claim 10
Independent Claim
127 words
A method for forming a film-forming liquid crystal composition containing emulsion which comprises: adding to a latex of a transparent film-forming polymer having from about 30-95 weight percent water, a solution of a cholesteric liquid crystal composition in a moderately water soluble organic solvent having a boiling point less than about 150°C, said solution having a sufficient amount of a thickening agent to provide a final concentration of from about 0.1 to 2 weight percent of the total composition, said liquid crystal composition being present in amount to provide from about 25-75 weight percent of the total solids content, wherein said solution is at a temperature in the range of about 40°-100°C, and stirring the resulting mixture for a time sufficient to provide a substantially uniform composition.
Claim 11
Dependent Claim
46 words
A method according to claim 7, wherein said solvent is present in an amount sufficient to provide 30-50 weight percent of the total liquid and said liquid crystal composition is present in an amount sufficient to provide from 45-55 weight percent of the total liquid and
Claim 12
Dependent Claim
27 words
A method according to claim 8, wherein said latex is an acrylic latex and said solvent is an oxygenated solvent of from 3 to 6 carbon atoms.
Claim 13
Dependent Claim
28 words
A method according to claim 8, wherein said latex is a chlorovinyl polymer latex and said solvent is an oxygenated solvent of from 3 to 6 carbon atoms.
Claim 14
Dependent Claim
32 words
A method according to claim 8, wherein included in said liquid crystal solution is a nonionic emulsifier in an amount sufficient to provide 0.1 to 2 weight percent of the final composition.
References Cited (Backward Citations)
GB1161039A
Cited
US3600060A
Cited
US3620889A
Cited
US3617374A
Cited
US3655971A
Cited
US3669729A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-07-13 | 1980-01-12 | 1980-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-13 | 1984-01-12 | 1984-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-13 | 1988-01-12 | 1988-07-13 | $7700.00 | Window Closed / Lapsed |