| (19) |
 |
|
(11) |
EP 0 312 277 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
23.11.1989 Bulletin 1989/47 |
| (43) |
Date of publication A2: |
|
19.04.1989 Bulletin 1989/16 |
| (22) |
Date of filing: 11.10.1988 |
|
| (51) |
International Patent Classification (IPC)4: C11D 17/04 |
|
| (84) |
Designated Contracting States: |
|
CH DE ES FR GB IT LI NL SE |
| (30) |
Priority: |
13.10.1987 GB 8724025
|
| (71) |
Applicants: |
|
- UNILEVER PLC
London EC4P 4BQ (GB)
GB
- UNILEVER N.V.
3013 AL Rotterdam (NL)
CH DE ES FR IT LI NL SE
|
|
| (72) |
Inventors: |
|
- Newbold, Geoffrey
Bebington
Wirral L63 9LS (GB)
- Wagner, John Duncan
Upton-by-Chester
Cheshire CH2 1NN (GB)
- Wraige, Douglas
Upton-by-Chester
Cheshire CH2 1NN (GB)
|
| (74) |
Representative: Ford, Michael Frederick et al |
|
MEWBURN ELLIS
York House
23 Kingsway
London WC2B 6HP
London WC2B 6HP (GB) |
|
| |
|
(57) A container having at least one opening seal, which seal is mechanically strong in
the dry state but disintegrates in water at temperature of 40°C or below under the
influence of mechanical agitation. The seal is formed from a homopolymer or copolymer
of N-vinylpyrrolidone.