发明授权
US5156763A Laterally fluorinated 4-cyanophenyl and 4'-cyanobiphenyl benzoates
失效
四甲基氟化4-氰基苯甲酸和4'-氰基二苯甲酸酯
- 专利标题： Laterally fluorinated 4-cyanophenyl and 4'-cyanobiphenyl benzoates
- 专利标题（中）： 四甲基氟化4-氰基苯甲酸和4'-氰基二苯甲酸酯
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申请号： US571590申请日： 1990-08-30
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公开(公告)号： US5156763A公开(公告)日： 1992-10-20
- 发明人: George W. Gray , David Lacey , Kenneth J. Toyne , Michael Hird , Damien G. McDonnell
- 申请人： George W. Gray , David Lacey , Kenneth J. Toyne , Michael Hird , Damien G. McDonnell
- 申请人地址： GB2 Whitehall
- 专利权人： The Secretary of State for for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland
- 当前专利权人： The Secretary of State for for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland
- 当前专利权人地址： GB2 Whitehall
- 优先权： GBX8804330 19880224
- 主分类号： G02F1/13
- IPC分类号： G02F1/13 ; C07C69/773 ; C07C255/51 ; C07C255/55 ; C09K19/12 ; C09K19/20 ; C09K19/46
摘要：
Laterally fluorinated 4-cyanophenyl and 4'-cyanobiphenyl benzoates are diosed of general formula I: ##STR1## in which R is R.sup.1 or R.sup.1 O, wherein R.sup.1 is C.sub.1 -C.sub.12 alkyl, m and n are 0 or 1 provided that (n+m) is 0 or 1, each of a, b, c and d are independently 0 or 1, provided (a+b+c+d) is not zero, but excluding the case where a and b are 0 and one of c and d is 0, being useful constituents of nematic liquid crystal materials.
公开/授权文献
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