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EP0274128A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Liquid-crystalline polymer

Assignee: Idemitsu Kosan Co Ltd
•
Filing: 1987-12-29
•
Granted: —
•
Expires: 2007-12-29
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Abstract

Abstract A liquid-crystalline polymer comprising the repeating units of the general formula (I) in which : k is an integer from 1 to 30 ; and R 1 is where : X is -COO-or -OCO-: and R 2 is -COOR 3 , OCOR 3 , or -OR3 where : R3 is R 4 and R 5 being each independently -CH 3 , a halogen radical, or -CN, m and n being each independently an integer from 0 to 10 with the proviso that n is not 0 when R 4 is -CH 3 , p being 0 or 1, and C marked with being an asymmetric carbon atom. The polymers of the present invention exhibit a ferroelectricity even at temperatures around room temperature and as well have such a high speed of response to external factors that they can be used for displaying motion pictures, and the polymers may also be advantageously used as display elements for large displays or curved displays.

Inventors

  • 👤 Satoshi C/O Idemitsu Kosan Co. Ltd. Hachiya
  • 👤 Shunji C/O Idemitsu Kosan Co. Ltd. Uchida
  • 👤 Kenji C/O Idemitsu Kosan Co. Ltd. Hashimoto

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-01 02:59
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/04; C08G65/22; C09; C09K; C09K19/00; C09K19/04; C09K19/38; C09K19/3833; C09K19/3876; C09K19/388

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 104 words
A liquid-crystalline polymer comprising repeating units of the general formula (I) in which : k is an integer from 1 to 30 ; and R' is where : X is -COO-or -OCO-; and R 2 is -COOR 3 ,-OCOR 3 , or -OR3 where : R3 is R 4 and R 5 being each independently -CH 3 . a halogen radical, or -CN, m and n being each independently an integer from 0 to 10 with the proviso that n is not 0 when R 4 is -CH 3 , p being 0 or 1, and C marked with being an asymmetric carbon atom.
Claim 2
Dependent Claim 104 words
A liquid-crystalline polymer comprising repeating units of the general formula (I) in which : k is an integer from 1 to 30 ; and R' is where : X is -COO-or -OCO-; and R 2 is -COOR 3 ,-OCOR 3 , or -OR3 where : R3 is R 4 and R 5 being each independently -CH 3 . a halogen radical, or -CN, m and n being each independently an integer from 0 to 10 with the proviso that n is not 0 when R 4 is -CH 3 , p being 0 or 1, and C marked with being an asymmetric carbon atom.
Claim 3
Dependent Claim 21 words
The liquid-crystalline polymer of claim 1 wherein the number average molecular weight of the liquid-crystalline polymer is from 2,000 to 400,000.
Claim 4
Dependent Claim 25 words
The liquid-crystalline polymer of claim 1 wherein the number average molecular weight of the liquid-crystalline polymer is less than 2,000 and not less than 1,000.
Claim 5
Dependent Claim 17 words
The liquid-crystalline polymer of claims 2 or 3 wherein k is an integer from 4 to 10.
Claim 6
Dependent Claim 18 words
The liquid-crystalline polymer of claims 2 or 3 wherein R' is selected from the group consisting of and
Claim 7
Dependent Claim 18 words
The liquid-crystalline polymer of claims 2 or 3 wherein R 3 is selected from the group consisting of

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