(19)
(11)EP 0 422 996 A3

(12)EUROPEAN PATENT APPLICATION

(88)Date of publication A3:
17.06.1992 Bulletin 1992/25

(43)Date of publication A2:
17.04.1991 Bulletin 1991/16

(21)Application number: 90402752.1

(22)Date of filing:  04.10.1990
(51)International Patent Classification (IPC)5C07C 69/78, C09K 19/20, C09K 19/32, C07C 69/88, C07C 69/94, G02F 1/13
(84)Designated Contracting States:
DE FR GB

(30)Priority: 06.10.1989 JP 261804/89
21.11.1989 JP 302569/89
29.11.1989 JP 309709/89
12.12.1989 JP 321829/89
27.12.1989 JP 339482/89
22.01.1990 JP 12005/90
22.01.1990 JP 12006/90

(71)Applicant: Showa Shell Sekiyu Kabushiki Kaisha
Tokyo (JP)

(72)Inventors:
  • Suzuki, Yoshiichi, c/o Showa Shell Sekiyu
    Chiyoda-ku, Tokyo 100 (JP)
  • Yamakawa, Noriko, c/o Showa Shell Sekiyu
    Chiyoda-ku, Tokyo 100 (JP)
  • Aihara, Yoshihiko, c/o Showa Shell Sekiyu
    Chiyoda-ku, Tokyo 100 (JP)
  • Mogamiya, Hiroyuki, c/o Showa Shell Sekiyu
    Chiyoda-ku, Tokyo 100 (JP)
  • Ooide, Toru, c/o Showa Shell Sekiyu
    Chiyoda-ku, Tokyo 100 (JP)
  • Isozaki, Tadaaki, c/o Showa Shell Sekiyu
    Chiyoda-ku, Tokyo 100 (JP)
  • Negi, Yuvraj Singh, c/o Showa Shell Sekiyu
    Chiyoda-ku, Tokyo 100 (JP)
  • Sakuma, Shigenori, c/o Showa Shell Sekiyu
    Chiyoda-ku, Tokyo 100 (JP)

(74)Representative: Bourgognon, Jean-Marie et al
Cabinet Flechner 22, Avenue de Friedland
75008 Paris
75008 Paris (FR)


(56)References cited: : 
  
      


    (54)Liquid crystal compound


    (57) Liquid crystal compound of the formula

    wherein R1 and R2 each is a C1-18 alkyl group or an aralkyl group, R3 is a haloalkyl group, X is -0-, -CO-, -COO-or -OCO-, Y is -COO-, -OCO-, -CH20- or -OCH2-, Z is -COO-or -0-, (A) and (B) each is a cyclic group and p and ℓ each is zero or one.







    Search report