Liquid crystal dielectrics, new dyestuffs useful therein,...

Details Liquid crystal dielectrics, new dyestuffs useful therein,... Liquid crystal dielectrics, new dyestuffs useful therein,...

C - Chemistry, Metallurgy

07

C

31/105, 260/396,

C07C 50/32 (2006.01) C09B 13/02 (2006.01) C09K 19/04 (2006.01) C09K 19/60 (2006.01)

Patent

CA 1198121

"LIQUID CRYSTAL DIELECTRICS, NEW DYESTUFFS USEFUL THEREIN, PROCESSES FOR THEIR PREPARATION, AND ELECTROOPTICAL DISPLAY ELEMENTS BASED THEREON" Abstract of the Disclosure A new liquid crystal dielectric contains at least one dyestuff of formula I Image X wherein R1 and R2 are identical or different and each is alkyl or alkoxy each of 3 to 8 C atoms or a group Z-Y-, or one of R1 and R2 can also be hydrogen, methyl, ethyl, methoxy or ethoxy; Z is R-Ph-, R-Ph-Ph-, R-Cy-, R-Cy-Cy-, R-Cy-Ph- or R-Ph-Cy-; Ph is 1,4-phenylene; Cy is 1,4-cyclohexylene; Y is -CH2-, -O-, -S-, -NH-, -CH2CH2-, -CH2-O-, -CH2-S-, -CH2-NH- or a direct bond; and R is hydrogen or alkyl or alkoxy, each of 1-8 C atoms.

420535

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