C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
31/105, 260/251,
C07C 69/76 (2006.01) C07C 43/225 (2006.01) C07C 43/23 (2006.01) C07C 45/71 (2006.01) C07C 47/575 (2006.01) C07C 65/21 (2006.01) C07C 69/017 (2006.01) C07C 69/75 (2006.01) C07C 69/753 (2006.01) C07C 69/82 (2006.01) C07C 69/92 (2006.01) C07C 255/55 (2006.01) C07C 327/16 (2006.01) C07C 327/28 (2006.01) C07D 213/80 (2006.01) C07D 239/26 (2006.01) C07D 319/06 (2006.01) C09K 19/04 (2006.01) C09K 19/06 (2006.01) C09K 19/20 (2006.01) C09K 19/30 (2006.01)
Patent
CA 1341036
Achiral fluorine-containing liquid crystal compounds are provided. These compounds are of the general formula I Image where M, N and P are each independently Image a, b, and c are independently zero or an integer of from 1 to 3 with the proviso that the sum of a + b + c be at least 2; each A and B are non-directionally and each independently nil, Image Image , -CH2CH2-, -CH=CH-, -C~C-, CH=N-, -CH2-O-, -CO- or -O-; each X, Y and Z are independently -H, -Cl, -F, -Br, -I, -OH, 2/3 -OCH3, -CH3, -CN or -NO2; each l, m and n are independently zero or an integer of 1 to 4, D is Image , -O-(CH2)r-, -(CH2)r-, -OSO2-, -SO2-, -SO2-(CH2)r-, -O(CH2)r-O-(CH2)r, Image where r and r' are independently 1 to 20, and p is 0 to 4; R is -O-C4H2q-O-C q'H2q'+l' -C q H2q-O-C q'H2q'+l' -C q H2q-R', -O-c q H2q-R', Image where R' is -Cl, -F, -CF3, -NO2, -CN, -H, Image and q and q' are independently 1 to 20, and R can be straight chain or branched, and R f is C q F2q+1 where q and q' are independently 1 to 20. The compounds comprise a fluorocarbon terminal portion and a hydrocarbon or another fluorocarbon terminal portion, the terminal 3/3 portions being connected by a central core, the compounds having smectic mesophases or having latent smectic mesophases. The compounds are useful in smectic liquid crystal display devices bath alone and in mixtures with other materials. Also provided is a process for preparing these compounds.
609228
Minnesota Mining And Manufacturing Company
Smart & Biggar
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