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1. (WO1998053025) PHOSPHORESCENT PIGMENT AND PROCESS FOR PREPARING THE SAME
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1998/053025 International Application No.: PCT/JP1997/001671
Publication Date: 26.11.1998 International Filing Date: 19.05.1997
Chapter 2 Demand Filed: 18.06.1997
IPC:
C09K 11/77 (2006.01)
C CHEMISTRY; METALLURGY
09
DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
K
MATERIALS FOR APPLICATIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
11
Luminescent, e.g. electroluminescent, chemiluminescent, materials
08
containing inorganic luminescent materials
77
containing rare earth metals
Applicants:
CITIZEN WATCH CO., LTD. [JP/JP]; 1-1, Nishi-Shinjuku 2-chome Shinjuku-ku Tokyo 163-04, JP (AllExceptUS)
FUKUSHIMA, Mizue [JP/JP]; JP (UsOnly)
HIRASHIMA, Hiroshi [JP/JP]; JP (UsOnly)
IMAI, Hiroaki [JP/JP]; JP (UsOnly)
OH, Junrok [KR/JP]; JP (UsOnly)
Inventors:
FUKUSHIMA, Mizue; JP
HIRASHIMA, Hiroshi; JP
IMAI, Hiroaki; JP
OH, Junrok; JP
Agent:
ISHIDA, Takashi ; A. Aoki & Associates Toranomon 37 Mori Building 5-1, Toranomon 3-chome Minato-ku Tokyo 105, JP
Priority Data:
Title (EN) PHOSPHORESCENT PIGMENT AND PROCESS FOR PREPARING THE SAME
(FR) PIGMENT PHOSPHORESCENT ET SON PROCEDE DE PREPARATION
Abstract:
(EN) A phosphorescent pigment comprising mother crystals doped with a rare earth element and produced by firing a gel powder prepared by the sol-gel process from any desired combination of an alkoxide derivative, an organic acid salt, an inorganic acid salt, an oxide and a chloride of metallic elements constituting the pigment. It can be prepared by a simplified process, has a high crystal purity and is free from inclusion of impurities, and the pigment particle diameter can be easily controlled as desired.
(FR) L'invention concerne un pigment phosphorescent comprenant des cristaux fossiles dopés à l'aide d'un élément du groupe des terres rares et produit par la cuisson d'une poudre de gel préparée par le procédé sol-gel à partir de toute combinaison voulue d'un dérivé d'alcoxyde, d'un sel d'acide organique, d'un sel d'acide inorganique, d'un oxyde et d'un chlorure d'éléments métalliques constituant le pigment. Il peut être préparé par un procédé simplifié, présente une pureté cristalline élevée, est exempt d'inclusions d'impuretés et son diamètre de particule peut être modifié facilement selon les besoins.
Designated States: AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, CA, CH, CN, CU, CZ, DE, DK, EE, ES, FI, GB, GE, GH, HU, IL, IS, JP, KE, KG, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MD, MG, MK, MN, MW, MX, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, TJ, TM, TR, TT, UA, UG, US, UZ, VN, YU
African Regional Intellectual Property Organization (ARIPO) (GH, KE, LS, MW, SD, SZ, UG)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, CH, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, ML, MR, NE, SN, TD, TG)
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)
Also published as:
EP0990690US6423247CN1246139DE000069731126AU1997027901