Dainippon Ink and Chemicals, Incorporated

Kawamura Institute of Chemical Research

Takasi Yamaki

Hisato Sato

Yoshi Arai

Yutaka Fujita

Masayuki Tazume

Haruyoshi Takatsu

Kazuo Kimura

Katsuhiko Morita

Masanao Ohzeki

A liquid crystalline composition comprising a nematic liquid crystalline substance and as an additive, a 1,8-diazo-bicyclo(5,4,0) undecene-7 alkyl ammonium salt of benzoic acid optionally having a substituent at the paraposition.

Liquid crystalline composition

A nematic liquid crystal composition comprising (I) 4-n-valeryloxy-4'-cyanobiphenyl, (II) 4-n-caproyloxy-4'-cyanobiphenyl and (III) 4'-cyanophenyl-4-n-heptylbenzoate, and either (IV) 4'-cyanophenyl-4-n-butylbenzoate or (V) 4'-cyanophenyl-4-n-nonylbenzoate, said composition having a crystal-nematic transition temperature of -40.degree. to -20.degree. C and a nematic-isotropic transition temperature of 50.degree. to 65.degree. C.

Nematic liquid crystal composition

Growing community of inventors

Tokyo, Japan

Takasi Yamaki