POLYMERIZABLE LIQUID CRYSTAL COMPOUND, LIQUID CRYSTAL COMPOSITION, OPTICALLY ANISOTROPIC MATERIAL, AND OPTICAL ELEMENT

• Main Authors: YOSHIDA KARA, NAGAYAMA HIROMICHI, KAIDA YURIKO
• Format: Patent
• Language: English
• Published: 17.06.2008
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; ADHESIVES; CHEMISTRY; COMPOSITIONS BASED THEREON; DYES; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC CHEMISTRY; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; POLISHES; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; THEIR PREPARATION OR CHEMICAL WORKING-UP

This invention provides a novel liquid crystal compound for preparing, for example, an optical element which can exhibit a proper Rd value according to usable wavelength and applications and has high durability particularly against blue laser beams. The liquid crystal compound is represented by CH2=CR1-COO-(L)k-E1-E2 -E3-E4-R2 wherein R1: a hydrogen atom or a methyl group, R2: an alkyl group having 1 to 8 carbon atoms or a fluorine atom, k: 0 or 1, L:-(CH2)pO-or-(CH2)q-, wherein p and q are each independently an integer of 2 to 8, E1: a 1,4-phenylene group, and E2, E3 and E4: each independently a 1,4-phenylene group or a trans-1,4-cyclohexylene group, and at least one of E2 and E3 represents a trans-1,4-cyclohexylene group, provided that, in the 1,4-phenylene group and the trans-1,4-cyclohexylene group in E1 to E4, the hydrogen atom attached to the carbon atom in the group is optionally substituted by a fluorine atom, a chlorine atom, or a methyl group.