| (19) |
 |
|
(11) |
EP 0 281 295 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
30.05.1990 Bulletin 1990/22 |
| (43) |
Date of publication A2: |
|
07.09.1988 Bulletin 1988/36 |
| (22) |
Date of filing: 22.02.1988 |
|
|
| (84) |
Designated Contracting States: |
|
AT CH DE FR GB IT LI NL |
| (30) |
Priority: |
03.03.1987 GB 8704948
30.04.1987 GB 8710309
27.11.1987 GB 8727853
|
| (71) |
Applicants: |
|
- IMPERIAL CHEMICAL INDUSTRIES PLC
London SW1P 3JF (GB)
- SEIKO EPSON CORPORATION
Shinjuku-ku
Tokyo-to (JP)
|
|
| (72) |
Inventors: |
|
- Raistrick, James Hugh
Runcorn
Cheshire (GB)
- Shimoda, Tatsuya
Suwa-gun
Nagano-ken 399-02 (JP)
- Sakata, Masaaki
Chino-shi
Nagano-ken 391 (JP)
|
| (74) |
Representative: Walmsley, David Arthur Gregson (GB) |
|
10 Upton Lane
GB-Upton-by-Chester, Chester CH2 1EB
GB-Upton-by-Chester, Chester CH2 1EB (GB) |
|
| |
|
| (54) |
Process and composition for producing bonded magnet |
(57) A process for the production of a shaped article having magnetic properties from
a composition which comprises a mixture of a solid melt-processable and cross-linkable
organic material and a particulate magnetic material, which process comprises the
steps of
(1) shaping the composition in a mould at a temperature at which organic material
is in a fluid state,
(2) cooling the thus shaped composition so as to solidify the organic material, and
(3) cross-linking the organic material in the thus-shaped composition to produce a
cross-linked material.
Also, a composition as described which also contains a polymeric material which is
soluble in or dispersible in the organic material when the organic material is in
a liquid state.