发明授权
- 专利标题: Phenyldioxanes
- 专利标题(中): 苯二恶烷
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申请号: US654607申请日: 1991-02-12
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公开(公告)号: US5254698A公开(公告)日: 1993-10-19
- 发明人: David Coates , Simon Greenfield , Graham Smith , Volker Reiffenrath , Joachim Krause , Herbert Plach
- 申请人: David Coates , Simon Greenfield , Graham Smith , Volker Reiffenrath , Joachim Krause , Herbert Plach
- 申请人地址: DEX Darmstadt
- 专利权人: Merck Patent Gesellschaft mit beschrankter Haftung
- 当前专利权人: Merck Patent Gesellschaft mit beschrankter Haftung
- 当前专利权人地址: DEX Darmstadt
- 优先权: GBX8927778 19891208; GBX8928583 19891219
- 主分类号: G02F1/13
- IPC分类号: G02F1/13 ; C07D319/06 ; C09K19/34 ; C09K19/42 ; C07C319/06
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.
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