Novel lactic acid derivatives and liquid crystal compositions containing the same
申请人:DAINIPPON INK AND CHEMICALS, INC.
公开号:EP0329153A2
公开(公告)日:1989-08-23
compound represented by formula (I):
wherein R1 represents an alkyl group having from 1 to 18 carbon atoms; R2 represents an alkyl group having from 2 to 16 carbon atoms; rings A, B, C, and D each represents a 1,4-phenylene group or a 1,4-phenylene group having one or two halogen atoms; Y represents a single bond,
m and n each represents 0 or 1; p represents 0, 1, or 2; q represents 0 or an integer of from 1 to 6; and C* and C" each represents an asymmetric carbon atom in an (S)- or (R)-configuration, and a liquid crystal composition containing the compound of formula (I). The compound of formula (I) is a chiral liquid crystal compound exhibiting large spontaneous polarization, a long helical pitch, an SC* phase in a broad temperature range including room temperature, satisfactory orientation, and a high rate of response.
LIQUID-CRYSTAL COPOLYMER, PRODUCTION THEREOF, DIENE COMPOUND USED IN SAID PRODUCTION, AND PRODUCTION OF SAID COMPOUND
申请人:IDEMITSU KOSAN COMPANY LIMITED
公开号:EP0493601A1
公开(公告)日:1992-07-08
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.
Liquid crystal compound and liquid crystal display device
申请人:MITSUBISHI GAS CHEMICAL COMPANY, INC.
公开号:EP0497297A2
公开(公告)日:1992-08-05
An antiferroelectric liquid crystal compound which is a compound represented by
(1) formula (I-a)
(2) formula (I-b)
(3) formula (I-c)
wherein R denotes a linear aliphatic alkyl group having 6 to 14 carbon atoms; A denotes a single bond or an oxygen atom; X and Y independently denote a hydrogen atom or a fluorine atom but they are not hydrogen atoms at the same time; h and i are independently 1 or 2; m is an integer of 3 to 10; Z denotes CH3, C2H5 or CF3; k is 0 or an integer of 5 to 8; I is 0 or 1; n is an integer of 1 to 6; W denotes CH3 or CF3; when W is CH3, p and q are both 0 and r is 8; when W is CF3, p is 5 to 8, q is 1 and r is 1 to 4; and C* denotes an asymmetric carbon atom,
and a liquid crystal display device using same.
一种反铁电液晶化合物,它是由以下各项表示的化合物
(1) 式(I-a)
(2) 式 (I-b)
(3) 式 (I-c)
其中 R 表示具有 6 至 14 个碳原子的线性脂肪族烷基;A 表示单键或氧原子;X 和 Y 独立地表示氢原子或氟原子,但它们不能同时为氢原子;h 和 i 独立地为 1 或 2;m为3至10的整数;Z表示CH3、C2H5或CF3;k为0或5至8的整数;I为0或1;n为1至6的整数;W表示CH3或CF3;当W为CH3时,p和q均为0,r为8;当W为CF3时,p为5至8,q为1,r为1至4;以及C*表示不对称碳原子、
以及使用这种材料的液晶显示装置。
Liquid crystal composition and information display apparatus using the liquid crystal composition
申请人:IDEMITSU KOSAN COMPANY LIMITED
公开号:EP0509465A1
公开(公告)日:1992-10-21
A liquid crystal composition comprising 5 to 99 % by weight of a liquid-crystalline copolymer, which has both an alkyl chain and a siloxane chain in its main chain, and 1 to 95 % by weight of a low molecular weight liquid-crystalline compound operates at a wide range of temperatures including room temperature, has an excellent film formability, is easy to orient to a high degree by mechanical orientation methods including bending orientation method and responds to the change of electric field at a high speed.
High polymer and ferroelectric liquid crystal composition utilizing same
申请人:IDEMITSU KOSAN COMPANY LIMITED
公开号:EP0548808A2
公开(公告)日:1993-06-30
A high polymer comprising a recurring unit (I) represented by the formula:
and a recurring unit (II) represented by the formula:
wherein
r, u, p and s each represent an integer of 2 to 5, q represents a number of 0 to 20, m represents an integer of 8 to 12, n represents an integer of 6 to 15, a represents an integer of 1 to 8, b represents an integer of 5 to 15, Y represents -O- or -COO-, Z represents -O-or a single bond, and * represents an asymmetric carbon, and a ferroelectric liquid crystal composition comprising the high polymer and a low molecular weight smectic liquid crystal are disclosed.