摘要:
Phenyldioxanes of the formula I ##STR1## wherein R.sup.1 is an alkyl or alkenyl residue each with up to 16 C atoms, wherein one or two non-adjacent CH.sub.2 groups of these residues may be replaced by --CO--O-- or --O--CO--,Q.sup.1 and Q.sup.2 are each independently ##STR2## L.sup.1 and L.sup.2 are each independently F or H, and Y is Cl, F, CN, CF.sub.3, OCF.sub.3 or OCF.sub.2 H,m and n is 0 or 1,are suitable as components of liquid crystal media.
摘要:
Chiral, tilted, smectic liquid-crystal phases containing at least two liquid-crystal components and at least one chiral doping agent, at least one liquid-crystal component being a compound having the structural unit 2,3-difluoro-1,4-phenylene, are distinguished by a very low viscosity and advantageous switching times.
摘要:
Novel cyanohydrin derivatives of general formula (I) wherein R.sup.1 is hydrogen, alkyl, alkoxy, perfluoroalkyl or perfluoroalkoxy, R.sup.2 is alkyl, r is 1 to 10, n and m are 0 or 1, provided if both n and m are 0 then X is (II) or (III), where (F) indicates one or more optional fluorines, p is 0 or 1, Z is a single bond if p is 0 and COO if p is 1; and if one or both of n or m are 1 then X is (IV), where each ring A, B and C is phenyl, fluoro- or chloro-phenyl, cyclohexyl, pyrimidyl, pyridyl, or dioxanyl, A, B and C are single bonds or linking groups, and (a+b+c) is 2 or 3. Liquid crystal materials containing these compounds are also described.
摘要:
The invention relates to a polymeric film composed of an optically anisotropic material made from a cross-linked synthetic resin composition comprising a polymer network, being obtainable by copolymerization of a mixture comprising(a) at least one monomer or oligomer, each of said monomers or oligomers having at least two polymerizable functional groups selected from the group consisting of (meth-)acrylate ester, epoxy and vinyl ether,(b) at least one achiral liquid crystalline monomer or oligomer, each of said monomers/oligomers having mesogenic groups and one polymerizable functional group selected from the group consisting of (meth-)acrylate ester, epoxy and vinyl ether.
摘要:
The invention relates to an anisotropic polymer film or polymer net-work obtainable by photopolymerization of at least one mesogene-containing compound, having two side chains attached to a mesogenic core structure one of which is polymerizable, the other of which is capable of forming association dimers by hydrogen bonds.
摘要:
A novel LCP material based on di-esters of itaconic acid is disclosed having general formula (I), where R.sub.1 and R.sub.2 may or may not be the same and have general structure (II); (a)=(b), (c), (d); p=2 to 14; q=0 or 1; r=1 or 2; s=1 or 2; X =O, CO.sub.2, O.sub.2 C, CH.sub.2 ; Y=C.sub.2 H.sub.4, O, CO.sub.2, O.sub.2 C; Z=CN, halogen, R, CO.sub.2 R, OR, O.sub.2 CR; wherein R=chiral or achiral; excluding X=O and X=CH.sub.2 when A=phenyl, r=s=1, Y=CO.sub.2, O.sub.2 C, q=1 and Z=CN, R, CO.sub.2 R, OR.
摘要翻译:PCT No.PCT / GB93 / 01016 Sec。 371日期1994年12月6日第 102(e)日期1994年12月6日PCT提交1993年5月19日PCT公布。 出版物WO93 / 25632 日本1993年12月23日公开了一种基于衣康酸的二酯的新型LCP材料,其具有通式(I),其中R 1和R 2可以相同也可以不相同并具有通式(II); (a)=(b),(c),(d); p = 2〜14; q = 0或1; r = 1或2; s = 1或2; X = O,CO 2,O 2 C,CH 2; Y = C2H4,O,CO2,O2C; Z = CN,卤素,R,CO 2 R,OR,O 2 CR; 其中R =手性或非手性; 当A =苯基时,X = O和X = CH 2,r = s = 1,Y = CO 2,O 2 C,q = 1,Z = CN,R,CO 2 R,OR。
摘要:
Mesogenic compounds with a .omega.-CF.sub.3 -alkyl, .omega.-CF.sub.3 -alkenyl or .omega.-CF.sub.3 -alkinyl terminal group of formula I ##STR1## with the meaning of R, Z, Q, ##STR2## m, n and o being indicated in claim 1.
摘要:
##STR1## Novel cyanohydrin derivatives of general formula (I) wherein R 1 is hydrogen, alkyl, alkoxy, perfluoroalkyl or perfluoroalkoxy, R 2 is alkyl, r is 1 to 10, n and m are 0 or 1, provided if both n and m are 0 then X is (II) or (III), where (F) indicates one or more optional fluorines, p is 0 or 1, Z is a single bond if p is 0 and COO is p is 1; and if one or both of n or m are 1 then X is (IV), where each ring A, B and C is phenyl, fluoro- or chloro-phenyl, cyclohexyl, pyrimidyl, pyridyl, or dioxanyl, A, B and C are single bonds or linking groups, and (a+b+c) is 2 or 3. Liquid crystal materials containing these compounds are also described.
摘要:
A chiral, tilted, smectic liquid crystal phase comprising a mixture of at least two compounds, wherein at least one compound is an achiral fluorinated biphenyldiole compound of formula I ##STR1## whereinR.sup.1 and R.sup.2 are each independently alkoxy or alkanoyloxy with 1 to 15 C atoms, ##STR2## denotes a 4,4-phenylene group optionally substituted by up to four F atoms, and is 1.
摘要:
The invention relates to an alignment layer for aligning liquid crystal molecules, with improved adhesion to liquid crystal (LC) films, to a composition containing a precursor material used for the preparation of such a layer, to a laminate comprising such a layer and at least one LC polymer film, and to the use of the alignment layer and the laminate for optical, electrooptical, decorative or security uses and devices, wherein the alignment layer and the precursor material comprise at least one reactive mesogen in monomeric, oligomeric or polymeric form.