| (19) |
 |
|
(11) |
EP 1 072 623 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
02.01.2003 Bulletin 2003/01 |
| (43) |
Date of publication A2: |
|
31.01.2001 Bulletin 2001/05 |
| (22) |
Date of filing: 14.03.2000 |
|
|
| (84) |
Designated Contracting States: |
|
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE |
|
Designated Extension States: |
|
AL LT LV MK RO SI |
| (30) |
Priority: |
21.07.1999 KR 9929619
26.01.2000 KR 0003589
|
| (71) |
Applicant: Daedong Company, Ltd. |
|
135-090 Seoul (KR) |
|
| (72) |
Inventor: |
|
- Lee, Sung Woo
Kwanak-Gu, 151-080 Seoul (KR)
|
| (74) |
Representative: Barz, Peter, Dr. |
|
Patentanwalt Kaiserplatz 2
80803 München
80803 München (DE) |
|
| |
|
| (54) |
Polyvalent metal salts of salicyclic acid resin and process for the preparation thereof |
(57) The present invention relates to a process for preparing polyvalent metal salts of
salicylic acid resin, comprising reacting salicylic acid or its derivative and styrene
or its derivative in the presence of zinc salt of organic carboxylic acid and/or polyvalent
metal compound at 50 to 200 °C to prepare the reaction product, and reacting the reaction
product with polyvalent metal compound; an aqueous dispersion where the polyvalent
metal salt of resin is dispersed in water; and to a color development sheet prepared
from the polyvalent metal salts of salicylic acid resin.