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(11)

EP 0 813 586 A1

(12)

(43) Date of publication: 29.12.1997 Bulletin 1997/52 (21) Application number: 96905059.0 (22) Date of filing: 11.03.1996

(51) International Patent Classification (IPC):  C11D 7/ 18( . ) C11D 3/ 39( . ) C11D 3/ 02( . ) C11D 7/ 54( . ) (86) International application number: PCT/JP1996/000601 (87) International publication number: WO 1996/028532 (19.09.1996 Gazette 1996/42)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI LU NL PT SE (30) Priority: 09.03.1995 JP 19950077074 (71) Applicant: Johnson Company, Ltd. Yokohama-shi, Kanagawa 231 (JP)

(72) Inventors: KURIYAMA, Yasuhisa, Mitsubishi Gas Chem. Co., Inc Yokkaichi-shi Mie 510 (JP) KOKUBU, Jun, Mitsubishi Gas Chemical Co.,Inc. Yokkaichi-shi Mie 510 (JP) HIRO, Yasuo, Mitsubishi Gas Chemical Co.,Inc Yokkaichi-shi Mie 510 (JP) TSUJI, Yoshiko, Mitsubishi Gas Chemical Co.,Inc. Yokkaichi-shi Mie 510 (JP) KOBAYASHI, Tsuneo, Johnson Co.,Ltd. Naka-gun Kanawaga 259-01 (JP) MIKAMI, Masahito, Johnson Co.,Ltd. Naka-gun Kanagawa 259-01 (JP) NAKAMURA, Shuzo, Johnson Co.,Ltd. Naka-gun Kanagawa 259-01 (JP) (74) Representative: Ruschke, Hans Edvard, Dipl.-Ing., et al  Ruschke Hartmann Becker Pienzenauerstrasse 2 81679 München 81679 München (DE)