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EP0244835A2
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Langmuir-Blodgett ultrathin membrane of polyfumurate
Assignee: NOF Corp
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Filing: 1987-05-06
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Granted: —
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Expires: 2007-05-06
Abstract
Abstract A Langmuir-Blodgett ultrathin membrane is constituted of polyfumarate having a degree of polymerization of 20 to 10,000. The polyfumarate is obtained by polymerizing fumarate represented by the general formula of: wherein at least one of R₁ and R₂ represents a bulky hydrocarbon group such as a branched alkyl group, a cycloalkyl group or a substituent thereof, a fluorine-substituted hydrocarbon group, a hetero atom-containing hydrocarbon group or a silicon-containing group.
Inventors
- 👤 Kiyotake Shigehara
- 👤 Akira Yamada
- 👤 Masahiko Hara
- 👤 Hidenari Nakahama
- 👤 Seizo Miyata
- 👤 Yoshishige Murata
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 10:24
CPC Classifications
H; H10; H10P; H10P14/00; H10P14/60; H10P14/63; H10P14/6326; H10P14/6342; H10P14/6344; B; B01; B01D; B01D69/00; B01D69/12; B01D69/122; B05; B05D; B05D1/00; B05D1/18; B05D1/20; B05D1/202; B82; B82Y; B82Y30/00; B82Y40/00; H10D; H10D64/00; H10D64/01; H10D64/013; H10D64/01302; H10D64/01332; H10D64/01336; H10D64/01358; H10D64/60; H10D64/66; H10D64/68; H10D64/693; H10K; H10K50/00; H10K50/10; H10K50/11; H10K85/00; H10K85/701; H10P14/68; H10P14/683; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10T; Y10T428/00; Y10T428/26; Y10T428/268
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
205 words
A Langmuir-Blodgett ultrathin membrane constituted of polyfumarate having a degree of polymerization of 20 to 10,000 and obtained by polymerizing fumarate represented by the general formula: wherein R₁ and R₂ represent the same or different groups and at least one of R₁ and R₂ represents a hydrocarbon group selected from the group consisting of a branched alkyl group having 3 to 12 carbon atoms, a cycloalkyl group having 3 to 12 carbon atoms, a substituted alkyl group having 2 to 6 carbon atoms and containing a ring structure substituent having 3 to 14 carbon atoms, and a substituted cycloalkyl group having 3 to 10 carbon atoms and containing a substituent of the same ring structure as said ring structure substituent; trifluoromethyl, pentafluoroethyl, heptafluoro-n-propyl, or a fluorine-substituted hydrocarbon group obtained by substituting at least one of hydrogen atoms of said hydrocarbon group with a fluorine atom; a hetero atom-containing hydrocarbon group containing in said hydrocarbon group a hetero atom selected from the group consisting of nitrogen, oxygen, phosphorus and sulfur atoms and not containing mobile hydrogen atom or atoms; or an organosilyl group, an organosilylalkyl group, an organosiloxanyl group, an organosiloxanylalkyl group, an organosiloxanylsilylalkyl group or an organosiloxanyloxysilylalkyl group, each having 1 to 8 silicon atoms.
Claim 2
Dependent Claim
205 words
A Langmuir-Blodgett ultrathin membrane constituted of polyfumarate having a degree of polymerization of 20 to 10,000 and obtained by polymerizing fumarate represented by the general formula: wherein R₁ and R₂ represent the same or different groups and at least one of R₁ and R₂ represents a hydrocarbon group selected from the group consisting of a branched alkyl group having 3 to 12 carbon atoms, a cycloalkyl group having 3 to 12 carbon atoms, a substituted alkyl group having 2 to 6 carbon atoms and containing a ring structure substituent having 3 to 14 carbon atoms, and a substituted cycloalkyl group having 3 to 10 carbon atoms and containing a substituent of the same ring structure as said ring structure substituent; trifluoromethyl, pentafluoroethyl, heptafluoro-n-propyl, or a fluorine-substituted hydrocarbon group obtained by substituting at least one of hydrogen atoms of said hydrocarbon group with a fluorine atom; a hetero atom-containing hydrocarbon group containing in said hydrocarbon group a hetero atom selected from the group consisting of nitrogen, oxygen, phosphorus and sulfur atoms and not containing mobile hydrogen atom or atoms; or an organosilyl group, an organosilylalkyl group, an organosiloxanyl group, an organosiloxanylalkyl group, an organosiloxanylsilylalkyl group or an organosiloxanyloxysilylalkyl group, each having 1 to 8 silicon atoms.
Claim 3
Dependent Claim
80 words
A Langmuir-Blodgett ultrathin membrane as claimed in claim 1 wherein said fumarate is selected from the group consisting of dicyclohexyl fumarate, dicyclopentyl fumarate, isopropylcyclohexyl fumarate, ethylcyclohexyl fumarate, sec-butylcyclohexyl fumarate, t-butylcyclohexyl fumarate, allylbenzyl fumarate, cyclohexylbenzyl fumarate, di-iso-propyl fumarate, isopropylbenzyl fumarate, isopropylphenyl fumarate, cyclohexylphenyl fumarate, di-iso-butyl fumarate, tert-butyl-methyl fumarate, tert-butyl-ethyl fumarate, tert-butyl-iso-propyl fumarate, tert-butyl-n-propyl fumarate, tert-butyl-n-butyl fumarate, tert-butyl-iso-butyl fumarate, tert-butyl-sec- butyl fumarate, di-tert-butyl fumarate, tert-butyl- cyclopentyl fumarate, tert-butyl-cyclohexyl fumarate, tert-butyl-2-ethylhexyl fumarate, tert-butyl-biscyclohexyl fumarate, tert-butyl-benzyl fumarate, tert-butyl-phenetyl fumarate, tert-butyl-α-phenetyl fumarate and di-iso-pentyl fumarate.
Claim 4
Dependent Claim
28 words
A Langmuir-Blodgett ultrathin membrane as claimed in claim 1 wherein said fumarate is selected from the group consisting of perfluorooctylethyl-isopropyl fumarate, trifluoromethyl-isopropyl fumarate, pentafluoroethyl-isopropyl fumarate, and heptafluoro-n-propyl-isopropyl fumarate.
Claim 5
Dependent Claim
28 words
A Langmuir-Blodgett ultrathin membrane as claimed in claim 1 wherein said fumarate is selected from the group consisting of cyanoethyl-isopropyl fumarate, glycidyl-isopropyl fumarate, diethylphosphonomethylisopropyl fumarate and 2-methylthioethyl-isopropyl fumarate.
Claim 6
Dependent Claim
57 words
A Langmuir-Blodgett ultrathin membrane as claimed in claim 1 wherein said fumarate is selected from the group consisting of methyl-(trimethylsilyl)-fumarate, ethyl-(trimethylsilyl)-fumarate, isopropyl-(trimethylsilyl)-fumarate, cyclohexyl-(trimethylsilyl)-fumarate, tert-butyl-(trimethylsilyl)-fumarate, methyl-(trimethylsilyl) methyl-fumarate, ethyl-(3-trimethylsilyl) propyl-fumarate, isopropyl-(trimethylsilyl)methyl-fumarate, isopropyl-(3-trimetylsilyl)propyl-fumarate, isopropyl-{3-tris (trimethylsiloxy)silyl}propyl-fumarate, isopropyl-3-{methylbis(trimethylsiloxy)silyl}propyl-fumarate, t-butyl-(trimethylsilyl)ethyl-fumarate, t-butyl-3-{tris (trimethylsiloxy)silyl}propyl-fumarate, t-butyl-3 -{(heptamethyl)trisiloxanyl}propyl-fumarate, 2-ethylhexyl-3-(trimethylsilyl)propyl-fumarate, 2-ethylhexyl-3-{tris (trimethylsiloxy)silyl}propyl-fumarate, 2-ethylhexyl-3-{(pentamethyl)disiloxanyl}propyl-fumarate, cyclohexyl{(trimethyl)silyl}methyl-fumarate, cyclohexyl-3-{tris (trimethylsiloxy)silyl} propyl-fumarate, isopropyl-3-{(penta-methyl)disiloxanyl} propyl-fumarate, isopropyl-3-[{(tris (pentamethyl)disiloxanyloxy}silyl] propypl-fumarate, cyclohexyl-3-[{(tris(pentamethyl) disiloxanyloxy} silyl] propyl-fumarate and t-butyl-3-[{tris-(pentamethyl)disiloxanyloxy}silyl]propyl-fumarate.
Claim 7
Dependent Claim
16 words
An eletrical element containing a Langmuir-Blodgett ultrathin membrane according to claim 1 as an insulating layer.
Claim 8
Dependent Claim
16 words
An electrical element as claimed in claim 6 wherein the element is a MIM type element.
Claim 9
Dependent Claim
16 words
An electrical element as claimed in claim 6 wherein the element is a MIS type element.
Claim 10
Dependent Claim
16 words
An electrical element as claimed in claim 6 wherein the element is a SIS type element.
Claim 11
Dependent Claim
103 words
A process for preparing a Langmuir-Blodgett ultrathin membrane comprising the steps of: dissolving a polyfumarate according to claim 1 in a vaporizable organic solvent immiscible with water to produce a polyfumarate solution having a concentration of not higher than 10 mg/ml; spreading out said polyfumarate solution on a clean water surface to produce a gaseous membrane having a surface pressure of not higher than 1 dyne/cm; horizontally applying a pressure to said gaseous membrane to produce on said water surface a monolayer solid membrane having a surface pressure of 10 to 30 dyne/cm; and transferring said monolayer solid membrane onto a substrate plate.
Claim 12
Dependent Claim
49 words
A process for producing a Langmuir-Blodgett ultrathin membrane as claimed in claim 10 wherein said step of transferring said monolayer solid membrane onto said substrate plate includes repetition of the operations of vertically introducing said substrate plate into the water and lifting said substrate plate out of the water.
Claim 13
Dependent Claim
57 words
A process for preparing a Langmuir-Boldgett ultrathin membrane as claimed in claim 10 wherein said step of transferring said monolayer solid membrane onto said substrate plate includes repetition of the operations of contacting said substrate plate with said monolayer solid membrane on said water surface in parallel with said water surface, followed by lifting said substrate plate.
Claim 14
Dependent Claim
31 words
A process for preparing a Langmuir-Boldgett ultrathin membrane as claimed in claim 10 wherein said organic solvent is selected from the group consisting of chloroform, ethylene chloride, ethylene dichloride and benzene.
Claim 15
Dependent Claim
41 words
A process for preparing a Langmuir-Blodgett ultrathin membrane as claimed in claim 10 wherein said step of horizontally applying a pressure to said gaseous membrane includes placing a float on said water surface and shifting said float in a predetermined direction.
Claim 16
Dependent Claim
37 words
A process for preparing a Langmuir-Blodgett ultrathin membrane as claimed in claim 10 wherein said substrate plate is formed of a material selected from the group consisting of metals, non-hydrophilic plastics, ceramics and water-insoluble inorganic solid crystals.
References Cited (Backward Citations)
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