US5258134A — Main chain-type chiral smectic polymer liquid cry…

Claim 1

Independent Claim 175 words

A main chain-type chiral smectic polymer liquid crystal comprising at least two main chain-type polymer liquid crystals, each having a recurring unit represented by the following formula (I) including an optically active group but having mutually different optically active groups: --(X--M--X--R)-- wherein M is a mesogen group having at least two cyclic groups including two terminal cyclic groups, R is an optically active flexible chain group, which is a branched chain group free from a cyclic structure and having a linear chain length not shorter than a 1,4-butylene group and in which the linear chain is composed of at least one of C, Si, O and S atoms, and X is a bonding group which is selected from the group consisting of ester, ether, thioester and carbonate groups; and the two of said at least two polymer liquid crystals show mutually reverse helical rotations in their chiral smectic phase and are mixed in a proportion providing the composition with a helical pitch which is longer than that of any of the two polymer liquid crystals.

Claim 2

Dependent Claim 175 words

A main chain-type chiral smectic polymer liquid crystal comprising at least two main chain-type polymer liquid crystals, each having a recurring unit represented by the following formula (I) including an optically active group but having mutually different optically active groups: --(X--M--X--R)-- wherein M is a mesogen group having at least two cyclic groups including two terminal cyclic groups, R is an optically active flexible chain group, which is a branched chain group free from a cyclic structure and having a linear chain length not shorter than a 1,4-butylene group and in which the linear chain is composed of at least one of C, Si, O and S atoms, and X is a bonding group which is selected from the group consisting of ester, ether, thioester and carbonate groups; and the two of said at least two polymer liquid crystals show mutually reverse helical rotations in their chiral smectic phase and are mixed in a proportion providing the composition with a helical pitch which is longer than that of any of the two polymer liquid crystals.

Claim 3

Dependent Claim 45 words

A polymer liquid crystal according to claim 1, wherein said at least two polymer liquid crystals include a polymer liquid crystal having a recurring unit represented by the following formula (II): ##STR19## wherein M and R have the same meanings as in the formula (I).

Claim 4

Dependent Claim 24 words

A polymer liquid crystal according to claim 1, wherein the M in the formula (I) denotes any one of the following groups 1-28: ##STR20##

Claim 5

Dependent Claim 23 words

A polymer liquid crystal according to claim 1, wherein R in the formula (I) is any one of the following groups (1)-(17): ##STR21##

Claim 6

Dependent Claim 26 words

A polymer liquid crystal according to claim 1, wherein one of said at least two polymer liquid crystals is present in a proportion of 1-99 mol%.

Claim 7

Dependent Claim 27 words

A polymer liquid crystal according to claim 1, wherein said at least two units having mutually different optically active groups show the same polarity of spontaneous polarization.

Claim 8

Dependent Claim 31 words

A polymer liquid crystal device comprising a film of a chiral smectic polymer liquid crystal according to claim 1 and an electrode disposed on at least one side of the film.

Claim 9

Dependent Claim 16 words

A device according to claim 7, wherein the film has been subjected to an aligning treatment.

Claim 10

Dependent Claim 155 words

A main chain-type chiral smectic polymer liquid crystal comprising a copolymer-type polymer liquid crystal comprising a main chain including at least two types of recurring units each represented by the following formula (I) including an optically active group but having mutually different optically active groups: --X--M--X--R-- (I), wherein M is a mesogen group having at least two cyclic groups including two terminal cyclic groups, R is an optically active flexible chain group which is a branched chain group free from a cyclic structure and having a linear chain length not shorter than 1,4-butylene group and in which the linear chain is composed of at least one of C, Si, O and S atoms, and X is a bonding group which is selected from the group consisting of ester, ether, thioester and carbonate groups; and the two of said at least two types of recurring units show mutually reverse helical rotations in their chiral smectic phase.

Claim 11

Dependent Claim 155 words

A main chain-type chiral smectic polymer liquid crystal comprising a copolymer-type polymer liquid crystal comprising a main chain including at least two types of recurring units each represented by the following formula (I) including an optically active group but having mutually different optically active groups: --X--M--X--R-- (I), wherein M is a mesogen group having at least two cyclic groups including two terminal cyclic groups, R is an optically active flexible chain group which is a branched chain group free from a cyclic structure and having a linear chain length not shorter than 1,4-butylene group and in which the linear chain is composed of at least one of C, Si, O and S atoms, and X is a bonding group which is selected from the group consisting of ester, ether, thioester and carbonate groups; and the two of said at least two types of recurring units show mutually reverse helical rotations in their chiral smectic phase.

Claim 12

Dependent Claim 37 words

A polymer liquid crystal according to claim 9, wherein said at least two recurring units include one represented by the following formula (II): ##STR22## wherein M and R have the same meanings as in the formula (I).

Claim 13

Dependent Claim 24 words

A polymer liquid crystal according to claim 9, wherein the M in the formula (I) is any one of the following groups 1-28: ##STR23##

Claim 14

Dependent Claim 23 words

A polymer liquid crystal according to claim 9, wherein R in the formula (I) is any one of the following groups (1)-(17): ##STR24##

Claim 15

Dependent Claim 28 words

A polymer liquid crystal according to claim 9, wherein one of the said at least two types of recurring units is present in a proportion of 1-99 mol%.

Claim 16

Dependent Claim 27 words

A polymer liquid crystal according to claim 9, wherein aid at least two units having naturally different optically active groups show the same polarity of spontaneous polarization.

Claim 17

Dependent Claim 31 words

A polymer liquid crystal device comprising a film of a chiral smectic polymer liquid crystal according to claim 9 and an electrode disposed on at least one side of the film.

Claim 18

Dependent Claim 16 words

A device according to claim 15, wherein the film has been subjected to an aligning treatment.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1996-11-01	1997-05-03	1997-11-02	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2000-11-01	2001-05-03	2001-11-02	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2004-11-01	2005-05-03	2005-11-02	$7700.00	Window Closed / Lapsed

Main chain-type chiral smectic polymer liquid crystal and polymer liquid crystal device

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