(19)
(11) EP 0 634 474 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
20.09.1995 Bulletin 1995/38

(43) Date of publication A2:
18.01.1995 Bulletin 1995/03

(21) Application number: 94110263.4

(22) Date of filing: 01.07.1994
(51) International Patent Classification (IPC)6: C11B 9/02, A61K 7/46, C11B 9/00, C07C 49/653
(84) Designated Contracting States:
CH DE ES FR GB LI

(30) Priority: 01.07.1993 JP 163491/93
02.07.1993 JP 164806/93

(71) Applicant: KAO CORPORATION
Chuo-ku, Tokyo (JP)

(72) Inventors:
  • Yamamoto, Junko
    Wakayama-shi, Wakayama (JP)
  • Tanaka, Shigeyoshi
    Wakayama-shi, Wakayama (JP)
  • Koshino, Junji
    Naga-gun, Wakayama (JP)
  • Tajima, Katsuhiko
    Chiba-shi, Chiba (JP)
  • Toi, Nao
    Sakura-shi, Chiba (JP)
  • Fujikura, Yoshiaki
    Utsunomiya-shi, Tochigi (JP)

(74) Representative: Hansen, Bernd, Dr. Dipl.-Chem. et al
Hoffmann, Eitle & Partner, Patentanwälte, Arabellastrasse 4
81925 München
81925 München (DE)


(56) References cited: : 
   
       


    (54) Treated labdanum oil, process for preparing the same, novel ketone compound, and perfume composition containing the same


    (57) 57 A process of preparing a treated labdanum oil is disclosed, which comprises: (a) a step of mixing a labdanum raw material with an aqueous alkali solution and separating the aqueous layer; (b) a step of adding an acidic substance to the aqueous layer separated in step (a) and separating the thus released acidic components of labdanum; and (c) a step of heating the acidic components obtained in step (b) at a temperature of from 200 to 350 °C for a period of from 0.1 to 10 hours. A treated labdanum oil prepared in this process and a perfume composition containing the same are also disclosed. A novel ketone compound of formula (I):


    and a perfume composition containing the ketone compound are further disclosed.





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