| (19) |
 |
|
(11) |
EP 0 340 847 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
03.10.1990 Bulletin 1990/40 |
| (43) |
Date of publication A2: |
|
08.11.1989 Bulletin 1989/45 |
| (22) |
Date of filing: 26.04.1989 |
|
|
| (84) |
Designated Contracting States: |
|
CH DE ES FR GB IT LI NL SE |
| (30) |
Priority: |
05.05.1988 GB 8810630
|
| (71) |
Applicants: |
|
- UNILEVER N.V.
3013 AL Rotterdam (NL)
CH DE ES FR IT LI NL SE
- UNILEVER PLC
London EC4P 4BQ (GB)
GB
|
|
| (72) |
Inventors: |
|
- Finch, Timothy David
Wirral, Merseyside L63 O7E (GB)
- Iley, William John
Bebington
Wirral, L63 9 LY (GB)
|
| (74) |
Representative: Bryant, Tracey et al |
|
Unilever PLC
Patent Division
Colworth House
Sharnbrook
Bedford MK44 1LQ
Bedford MK44 1LQ (GB) |
|
| |
|
| (54) |
Process for preparing bodies containing a peroxyacid compound and compositions comprising
said bodies |
(57) An improved process for preparing dry particulate bodies containing a solid peroxyacid
compound is disclosed, comprising the steps of
(A) forming a water-wet mixture of a solid peroxyacid compound and a hydratable material
having a temperature of hydration of up to 40° C, at a temperature which is higher
than the temperature of hydration of the hydratable material;
(B) forming the mixture of (A) into particles of the desired shape and size before,
during or after cooling the mass to below the temperature of hydration of the hydratable
material; and
(C) drying the particles obtained from step (B), the improvement being that in step
(A) a film-forming material is incorporated in, and intimately mixed with, the water-wet
mixture, forming a mix having a pH of below 7.
The peroxyacid-containing bodies obtainable therefrom are extremely suitable for use
as a bleach additive and for the incorporation in bleaching and/or detergent powder
compositions.