| (19) |
 |
|
(11) |
EP 0 268 202 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
29.11.1989 Bulletin 1989/48 |
| (43) |
Date of publication A2: |
|
25.05.1988 Bulletin 1988/21 |
| (22) |
Date of filing: 11.11.1987 |
|
| (51) |
International Patent Classification (IPC)4: B41M 5/38 |
|
| (84) |
Designated Contracting States: |
|
DE ES FR GB IT NL |
| (30) |
Priority: |
19.11.1986 JP 276305/86
|
| (71) |
Applicant: Kao Corporation |
|
Chuo-Ku
Tokyo 103 (JP) |
|
| (72) |
Inventors: |
|
- Yamaguchi, Shinichiro
Wakayama-shi
Wakayama (JP)
- Sakai, Koichi
Wakayama-shi
Wakayama (JP)
- Yashima, Hiroshi
Wakayama-shi
Wakayama (JP)
- Minato, Masanori
Wakayama-shi
Wakayama (JP)
|
| (74) |
Representative: Patentanwälte
Dr. Solf & Zapf |
|
Candidplatz 15
81543 München
81543 München (DE) |
|
| |
|
| (54) |
Thermal transfer ink |
(57) A thermal transfer ink of a solution type comprises a resin having a melt viscosity
of 10,000 to 1,000,000 cps (as measured at 120°C) as the base binder, characterized
by containing 5 to 250 parts by weight, based on 100 parts by weight of the base resin,
of at least one viscosity depressant selected from the group consisting of resins,
waxes, higher fatty acids, higher alcohols, and synthetic esters for the purpose of
lowering the melt viscosity, said viscosity depressant having a melt viscosity of
1 to 600 cps, measured at 120°c, and being insoluble in a solvent to use or so partially
soluble in the solvent that more than 1 gram of the viscosity depressant may not be
soluble in 100 grams of the solvent at 40°c.