EP0493601A1
Expired / Lapsed
EP
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Liquid-crystal copolymer, production thereof, diene compound used in said production, and production of said compound
Assignee: Idemitsu Kosan Co Ltd
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Filing: 1991-06-26
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Granted: —
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Expires: 2011-06-26
Abstract
Abstract A liquid-crystal copolymer developing ferro-electricity near room temperature and rapidly responding to a change in outer electric field, which comprises repeating units of general formulae (I) and (II) in a molar ratio of around 1:1, wherein r and p each represents an integer of 2 to 5; q represents an integer of 0 to 3; m represents an integer of 1 to 20; R¹ represents (a); R² represents -COOR³, -OR³ or -OCOR³; R³ represents (b); R⁴ and R⁵ each represents - CH₃ or halogen; a and d each represents an integer of 0 to 10; and b is 0 or 1, provided that d is not 0 when R⁵ represents - CH₃.
Inventors
- 👤 Kazuharu Idemitsu Kosan Co. Ltd. Morita
- 👤 Satoshi Idemitsu Kosan Co. Ltd. Hachiya
- 👤 Fumio Idemitsu Kosan Co. Ltd. Moriwaki
- 👤 Hiroyuki Idemitsu Kosan Co. Ltd. Endo
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 09:21
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/48; C08G77/50; C08G77/04; C08G77/38; C08G77/42; C09; C09K; C09K19/00; C09K19/04; C09K19/38; C09K19/3833; C09K19/40; C09K19/406; C09K19/408
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
139 words
A liquid-crystalline copolymer comprising a repeating unit represented by the following general formula and a repeating unit represented by the following general formula wherein each of r and p is an integer of 2 to 5, q is an integer of 0 to 3, m is an integer of 1 to 20, and R¹ is R² being -COOR³, -OR³ or -OCOR³, R³ being each of R⁴ and R⁵ being -CH₃ or a halogen atom, each of a and d being an integer of 0 to 10, b being an integer of 0 or 1, with the proviso that d is not 0 when R⁵ is -CH₃, the repeating unit represented by the general formula [I] and the repeating unit represented by the general formula [II] being present in the liquid-crystalline copolymer in a substantial molar ratio [I]:[II] of 1:1.
Claim 2
Dependent Claim
22 words
The liquid-crystalline copolymer as claimed in claim 1, wherein the liquid-crystalline copolymer has a number average molecular weight of 1,000 to 1,000,000.
Claim 3
Dependent Claim
17 words
The liquid-crystalline copolymer as claimed in claim 2, wherein R¹ is selected from the group consisting of
Claim 4
Dependent Claim
17 words
The liquid-crystalline copolymer as claimed in claim 3, wherein R³ is selected from the group consisting of
Claim 5
Dependent Claim
30 words
The liquid-crystalline copolymer as claimed in claim 2, wherein the repeating unit [I] is represented by the following formula and the repeating unit [II] is represented by the following formula
Claim 6
Dependent Claim
30 words
The liquid-crystalline copolymer as claimed in claim 2, wherein the repeating unit [I] is represented by the following formula and the repeating unit [II] is represented by the following formula
Claim 7
Dependent Claim
30 words
The liquid-crystalline copolymer as claimed in claim 2, wherein the repeating unit [I] is represented by the following formula and the repeating unit [II] is represented by the following formula
Claim 8
Dependent Claim
30 words
The liquid-crystalline copolymer as claimed in claim 2, wherein the repeating unit [I] is represented by the following formula and the repeating unit [II] is represented by the following formula
Claim 9
Dependent Claim
30 words
The liquid-crystalline copolymer as claimed in claim 2, wherein the repeating unit [I] is represented by the following formula and the repeating unit [II] is represented by the following formula
Claim 10
Dependent Claim
126 words
A process for preparing the liquid-crystalline copolymer as claimed in claim 1, comprising: carrying out a hydrosilylation reaction of substantially equimolecular quantities of a diene compound represented by the following general formula wherein each of r and p is an integer of 2 to 5, and R¹ is R² being -COOR³, -OR³ or -OCOR³, R³ being each of R⁴ and R⁵ being -CH₃ or a halogen atom, each of a and d being an integer of 0 to 10, b being an integer of 0 or 1, with the proviso that d is not 0 when R⁵ is -CH₃, and a silicon compound represented by the following formula wherein q is an integer of 0 to 3, in a solvent in the presence of a catalyst.
Claim 11
Dependent Claim
76 words
A diene compound represented by the following general formula wherein each of r and p is an integer of 2 to 5, and R¹ is R² being -COOR³, -OR³ or -OCOR³, R³ being each of R⁴ and R⁵ being -CH₃ or a halogen atom, each of a and d being an integer of 0 to 10, b being an integer of 0 or 1, with the proviso that d is not 0 when R⁵ is -CH₃.
Claim 12
Dependent Claim
17 words
The diene compound as claimed in claim 11, wherein R¹ is selected from the group consisting of
Claim 13
Dependent Claim
17 words
The diene compound as claimed in claim 12, wherein R³ is selected from the group consisting of
Claim 14
Dependent Claim
13 words
The diene compound as claimed in claim 11 represented by the following formula
Claim 15
Dependent Claim
13 words
The diene compound as claimed in claim 11 represented by the following formula
Claim 16
Dependent Claim
13 words
The diene compound as claimed in claim 11 represented by the following formula
Claim 17
Dependent Claim
176 words
A process for preparing the diene compound as claimed in claim 11, comprising: carrying out an etherification reaction of an alcohol represented by the following general formula wherein each of r and p is an integer of 2 to 5, and a difunctional compound represented by the following general formula X(CH₂) m X wherein m is an integer of 1 to 20, X is -Br, -I or in a solvent in the presence of an alkali agent; purifying a reaction mixture obtained by the etherification reaction to obtain a purified product; and carrying out an etherification reaction of the purified product and a hydroxy compound represented by the following general formula HO-R¹ wherein R¹ is R² being -COOR³, -OR³ or -OCOR³, R³ being each of R⁴ and R⁵ being -CH₃ or a halogen atom, each of a and d being an integer of 0 to 10, b being an integer of 0 or 1, with the proviso that d is not 0 when R⁵ is -CH₃, in a solvent in the presence of an alkali agent.
Claim 18
Dependent Claim
237 words
A process for preparing the diene compound as claimed in claim 11, comprising: carrying out an etherification reaction of an alcohol represented by the following general formula wherein each of r and p is an integer of 2 to 5, and a difunctional compound represented by the following general formula X(CH₂) m X wherein m is an integer of 1 to 20, X is -Br, -I or in a solvent in the presence of an alkali agent; purifying a reaction mixture obtained by the etherification reaction to obtain a purified product; carrying out an etherification reaction of the purified product and a compound represented by the following general formula wherein e is an integer of 1 or 2, in a solvent in the presence of an alkali agent; collecting a product by filtration from a reaction mixture obtained by the etherification reaction; hydrolyzing the product in water or an alcohol; pouring a reaction solution obtained by the hydrolysis into water to obtain a solution; making the pH of the solution acidic by adding a mineral acid; carrying out extraction of the acidified solution with ether; removing ether from the extrate to obtain a solid product; allowing the solid product to react with an acid halogenating agent to obtain an acid halide; carrying out an esterification reaction of the acid halide and a hydroxy compound represented by the following general formula HO-A-R² wherein A is in a solvent.
References Cited (Backward Citations)
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