| 摘要 |
New phenylacetylene compounds (I) are tolane, 4,4'-alkyltolane and 4,4'-alkoxytolane 4,4'-(meth)acrylates and derivatives with another phenylethynyl group and/or a cyclohexylene ring and/or ethylene or ethynyl group in the chain. New phenylacetylene compounds (I) are tolane, 4,4'-alkyltolane and 4,4'-alkoxytolane 4,4'-(meth)acrylates and derivatives with another phenylethynyl group and/or a cyclohexylene ring and/or ethylene or ethynyl group in the chain of the formula: Q<1>, Q<2>, Q<3> = (substituted) phenylene; B<1>, B<2> = H or methyl; W = a single bond, -CH2CH2- or -CC-; m, n = 0-14; p, q, r, s, t = 0 or 1; if q = 0, Q<2> and Q<3> = phenylene with 1-10C (fluoro)alkyl or (fluoro)alkoxy substituent(s); if s = 1, n = not 0; if t = 1, m = not 0. The full definitions are given in the DEFINITIONS (Full Definitions) Field. Independent claims are also included for: (a) liquid crystal compositions comprising a phenylacetylene compound (I); (b) polymers obtained by polymerizing the composition; (c) birefringent products produced from a polymer of this type; (d) liquid crystal or optical elements produced from (I) or the cited liquid crystal composition, polymer or birefringent product. |
