Compound and dichroic dye, and polarizing film
A dichroic and compound technology, applied in the field of polarizing film, can solve the problems of undocumented dichroic pigment polarizing film, etc.
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Embodiment 1
[0331] Example 1 [Preparation of compound (1A) (compound represented by the following (1A))]
[0332]
[0333] Compound (1A) was synthesized by the following scheme.
[0334]
[0335]Mix compound [compound (1B)] 5.00g represented by formula (1B), 4.63g of ethyl 4-hydroxybenzoate, 0.23g of dimethylaminopyridine (DMAP) and 25g of chloroform, under light-proof nitrogen atmosphere, Stir at 5°C for 10 minutes. 2.58 g of diisopropylcarbodiimide (IPC) was dripped at the obtained mixed liquid over 5 minutes, and it stirred further for 4 hours. 75 g of methanol was added to the obtained reaction liquid for crystallization, and the crystals were obtained by filtration. The crystals were further washed with an equivalent amount of methanol, and then vacuum-dried to obtain 6.78 g of compound (1A). Based on compound (1B), the yield was 87%.
[0336] Compound (1A) 1 H-NMR (CDCl 3 ): δ (ppm) 1.41 (t, 3H), 3.12 (s, 6H), 4.40 (m, 2H), 6.76 (m, 2H), 7.33 (m, 2H), 7.93 (dd, 4H), 8.15...
Embodiment 2
[0337] Example 2 [compound (1D) (compound represented by the following (1D))]
[0338]
[0339] Compound (1D) was synthesized according to the following scheme.
[0340]
[0341] 5.00 g of compound (1B), 4.63 g of 4-butyloxyphenol, 0.23 g of DMAP, and 25 g of chloroform were mixed, and stirred at 5° C. for 10 minutes in a dark and nitrogen atmosphere. IPC2.58g was dripped at the obtained liquid mixture over 5 minutes, and it stirred for 4 more hours. 75 g of methanol was added to the obtained reaction liquid for crystallization, and the crystals were obtained by filtration. The crystals were dissolved in 50 g of dimethylacetamide, and the insoluble matter was filtered through celite. The recovered filtrate was crystallized with water. The obtained crystals were further dissolved in 50 g of tetrahydrofuran, and insoluble matter was removed by filtration, then heptane was added, crystallized, and vacuum-dried to obtain 4.66 g of compound (1D). Based on compound (1B), t...
Embodiment 3
[0366] [Preparation of Polarizing Film Forming Composition]
[0367] The following components were mixed and stirred at 80° C. for 1 hour to prepare a composition (G) for forming a polarizing film.
[0368] Polymeric liquid crystal compound; compound (2-6) 75 parts
[0369] Compound (2-8) 25 parts
[0370] Dichroic pigment; compound (1A) 2.5 parts
[0371] polymerization initiator;
[0372] 2-Dimethylamino-2-benzyl-1-(4-morpholinophenyl)-1-butanone (Yanjiagu 369; manufactured by Ciba Specialty Chemicals Co., Ltd.) 6 parts
[0373] Leveling agent;
[0374] Polyacrylate compound (BYK-361N; manufactured by BYK Chemical Co., Ltd.) 1.5 parts
[0375] Solvent; 250 parts of toluene
[0376] [Measurement of Phase Transition Temperature]
[0377] The phase transition temperature of the polymerizable liquid crystal composition contained in the composition (G) for polarizing film formation was calculated|required similarly to the case of compound (2-6) and compound (2-8). After r...
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