| (19) |
 |
|
(11) |
EP 0 338 808 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
18.07.1990 Bulletin 1990/29 |
| (43) |
Date of publication A2: |
|
25.10.1989 Bulletin 1989/43 |
| (22) |
Date of filing: 19.04.1989 |
|
| (51) |
International Patent Classification (IPC)4: B41M 5/155 |
|
| (84) |
Designated Contracting States: |
|
AT BE CH DE ES FR GB GR IT LI LU NL SE |
| (30) |
Priority: |
20.04.1988 US 184066
|
| (71) |
Applicant: SCHENECTADY INTERNATIONAL, INC. |
|
Schenectady
New York 12301 (US) |
|
| (72) |
Inventors: |
|
- Brinkman, Karl M.
Galway
New York 12074 (US)
- Hanley, David R.
Gansevort
New York L283 (US)
- Sullivan, John L.
Ballston Lake
New York 12019 (US)
|
| (74) |
Representative: Jones, Helen Marjorie Meredith et al |
|
Gill Jennings & Every,
Broadgate House,
7 Eldon Street
London EC2M 7LH
London EC2M 7LH (GB) |
|
| |
|
| (54) |
Alkyl salicylate resin for carbonless copy paper and imaging use |
(57) Phenol/aldehyde condensation products useful in the development of colored images
from colorless dyes are disclosed. The phenol/aldehyde condensation products are
produced by the interaction of an alkyl-substituted salicylic acid, an alkyl-substituted
phenol, an aldehyde, and a metal source. The phenol/aldehyde condensation products
are particularly useful in a photosensitive imaging system in which images are formed
by the image-wise reaction of the developer with one or more chromogenic materials,
and in carbonless copy paper systems.