| (19) |
 |
|
(11) |
EP 0 122 523 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
27.05.1987 Bulletin 1987/22 |
| (43) |
Date of publication A2: |
|
24.10.1984 Bulletin 1984/43 |
| (22) |
Date of filing: 28.03.1984 |
|
|
| (84) |
Designated Contracting States: |
|
CH DE GB LI |
| (30) |
Priority: |
18.04.1983 US 486061
|
| (71) |
Applicant: Andrews Paper and Chemical Co., Inc. |
|
() |
|
| (72) |
Inventors: |
|
- Muller, Peter
()
- Mustacchi, Henry
()
|
|
| |
|
| (54) |
Diazotype compositions and materials |
(57) The use of soluble methylol compounds from primary or secondary amines or ammonia
with formaldehyde in diazotypes improves solution compatibility and prevents coupler
migration upon storage of diazotype materials. The methylol compounds may be reacted
with couplers separately or added to the coating preparations.