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EP0258898A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Liquid-crystalline polymer

Assignee: Idemitsu Kosan Co Ltd
•
Filing: 1987-09-03
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Granted: —
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Expires: 2007-09-03
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Abstract

Abstract A liquid-crystalline polymer comprising repeating units of the following general formula wherein: R 1 is -H, -CH 3 or -C 2 H 5 , I is an integer having a value of 1 to 20, k is an integer having a value of 1 to 30, A is -O-(oxygen) or -COO-, m is 0 or 1, and R 2 is or wherein Y is -COO-or -OCO-. and R 3 is -COOR 4 , -OCOR4, -OR 4 , -COR 4 or -R 4 where R 4 is R 5 being -CH 3 , -CN or a halogen radical, n and p being independently an integer having a value of 0 to 10 with the proviso that if R 5 is -CH 3 , p is not 0, X being a halogen radical, q being 0 or 1, and C* being an asymmetric carbon atom. The liquid-crystalline polymer not only exhibits liquid-crystalline properties and transfers to ferroelectric chiral smectic C phase at temperatures of a wide range including the vicinity of room temperature but also has a high speed in responding to external factors enabling to display motion pictures, and can be advantageously used as display elements of large size screens and curved screens.

Inventors

  • 👤 Kazuharu C/O Idemitsu Kosan Co. Ltd. Morita
  • 👤 Shunji C/O Idemitsu Kosan Co. Ltd. Uchida
  • 👤 Satoshi C/O Idemitsu Kosan Co. Ltd. Hachiya

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-08 01:27
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/38; C09K19/3833; C09K19/3838; C08; C08G; C08G63/00; C08G63/02; C08G63/60

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 146 words
A liquid-crystalline polymer comprising repeating units of the following general formula wherein: R I is -H, -CH 3 or -C 2 H 5 , I is an integer having a value of 1 to 20, k is an integer having a value of 1 to 30, A is -O-(oxygen) or -COO-, m is 0 or 1, and R 2 is or wherein Y is -COO-or -OCO-, and R 3 is -COOR 4 , -OCOR 4 , -OR 4 , -COR 4 or -R 4 where R 4 is R 5 being -CH 3 , -CN or a halogen radical, n and p being independently an integer having a value of 0 to 10 with the proviso that if R 5 is -CH 3 , p is not 0, X being a halogen radical, q being 0 or 1, and C * being an asymmetric carbon atom.
Claim 2
Dependent Claim 146 words
A liquid-crystalline polymer comprising repeating units of the following general formula wherein: R I is -H, -CH 3 or -C 2 H 5 , I is an integer having a value of 1 to 20, k is an integer having a value of 1 to 30, A is -O-(oxygen) or -COO-, m is 0 or 1, and R 2 is or wherein Y is -COO-or -OCO-, and R 3 is -COOR 4 , -OCOR 4 , -OR 4 , -COR 4 or -R 4 where R 4 is R 5 being -CH 3 , -CN or a halogen radical, n and p being independently an integer having a value of 0 to 10 with the proviso that if R 5 is -CH 3 , p is not 0, X being a halogen radical, q being 0 or 1, and C * being an asymmetric carbon atom.
Claim 3
Dependent Claim 21 words
The liquid crystalline polymer of claim 1 wherein R 5 is -CH 3 , -CI or -CN, and q is 0.
Claim 4
Dependent Claim 40 words
The liquid crystalline polymer of claim 1 wherein R 5 is -CH 3 , n is an integer having a value of 0 to 5, q is 1, and p is an integer having a value of 1 to 5.
Claim 5
Dependent Claim 21 words
The liquid-crystalline polymer of any of the claims 1 to 3, wherein the number average molecular weight is 3,000 to 200,000.
Claim 6
Dependent Claim 35 words
The liquid-crystalline polymer of any of the claims 1 to 4, wherein I is an integer having a value of 1 to 3, and k is an integer having a value of 10 to 12.
Claim 7
Dependent Claim 14 words
The liquid-crystalline polymer of claim 5, wherein A is -O-(oxygen), and R 2 is
Claim 8
Dependent Claim 15 words
The liquid-crystalline polymer of claim 6, wherein R 4 is selected from the following groups:

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