07-09-2017 дата публикации
Номер: US20170253801A1
The present invention relates to liquid crystalline (LC) medium, to a method of its production and to the use of such LC media in polymer network liquid crystalline (PNLC) light modulation elements operated in the reverse mode. Furthermore, the present invention relates to such light modulation elements, as such, to the use of such light modulation elements as light shutters for transparent OLED displays, and to a method of production of such light modulation elements according to the present invention. 1. A liquid-crystalline medium having a negative dielectric anisotropy comprising one or more compounds of formula I ,{'br': None, 'sup': a', 'a', '1', '1', '2', '1', '3', '4', '4', 'b', 'b, 'sub': s1', 'n1', 'n2', 's2, 'P-(Sp)-(A-Z)-A-Q-A-(Z-A)-(Sp)-P\u2003\u2003I'}in which the individual radicals have the following meanings:{'sup': 'a', 'Pdenotes a polymerizable group,'}{'sup': 'b', 'Pdenotes a polymerizable group, H or F,'}{'sup': a', 'b, 'Sp, Speach, independently of one another, denote a spacer group,'}s1, s2 each, independently of one another, denote 0 or 1,n1, n2 each, independently of one another, denote 0 or 1,{'sup': '1', 'sub': 2', '2', '2, 'claim-text': [{'sub': 2', '2', '4', '2', '2, '—OCH, —(CO)O—, —O(CO)—, —(CH)—, —CHCH—,'}, {'sub': 2', '2', '2', '2', '2', '2, '—CF—CF—, —CF—CH—, —CH—CF—, —CH═CH—,'}, {'sub': 2', '3', '2', '3, '—CF═CF—, —CF═CH—, —(CH)O—, —O(CH)—, —CH═CF—,'}, {'sub': 2', '2', '3', '2, '—C≡C—, —O—, —CH—, —(CH)—, or —CF—,'}], 'Qdenotes —CFO—, —OCF—, —CHO—,'}{'sup': 1', '4, 'sub': 2', '2', '2, 'claim-text': [{'sub': 2', '2', '4', '2', '2, '—OCH—, —(CO)O—, —O(CO)—, —(CH)—, —CHCH—,'}, {'sub': 2', '2', '2', '2', '2', '2, '—CF—CF—, —CF—CH—, —CH—CF—, —CH═CH—,'}, {'sub': 2', '3', '2', '3, '—CF═CF—, —CF═CH—, —(CH)O—, —O(CH)—, —CH═CF—,'}, {'sub': 2', '2', '3', '2, '—C≡C—, —O—, —CH—, —(CH)—, or —CF—,'}, {'sup': 1', '1', '2', '1, 'sub': 2', '2, 'where Zand Qor Zand Qdo not simultaneously denote a group selected from —CFO— and —OCF—,'}], 'Z, Zdenote a ...
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