| (19) |
 |
|
(11) |
EP 0 430 328 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
31.07.1991 Bulletin 1991/31 |
| (43) |
Date of publication A2: |
|
05.06.1991 Bulletin 1991/23 |
| (22) |
Date of filing: 14.11.1990 |
|
|
| (84) |
Designated Contracting States: |
|
CH DE ES FR GB IT LI NL SE |
| (30) |
Priority: |
27.11.1989 GB 8926718
|
| (71) |
Applicants: |
|
- UNILEVER N.V.
NL-3013 AL Rotterdam (NL)
CH DE ES FR IT LI NL SE
- UNILEVER PLC
London EC4P 4BQ (GB)
GB
|
|
| (72) |
Inventors: |
|
- Armstrong, Graem Douglas
Kemang Indah I Jakarta Selatan (ID)
- Cronin, Donal Gerard
Netherton,
Huddersfield (GB)
|
| (74) |
Representative: Geary, Stephen et al |
|
Unilever Plc,
Patent Division,
Colworth House
Sharnbrook,
Bedford MK44 1LQ
Sharnbrook,
Bedford MK44 1LQ (GB) |
|
| |
|
| (54) |
Process for preparing high bulk density detergent powders containing clay |
(57) A process for preparing a granular detergent composition or component having a bulk
density of at least 550 g/l, which comprises the steps of adding up to 35% by weight
of a swelling clay to a particulate starting material comprising:
(a) from 10 to 70% by weight of non-soap detergent active material, and
(b) at least 10% by weight of water-soluble crystalline inorganic salts, including
sodium tripolyphosphate and/or sodium carbonate,
the weight ratio of (a) to (b) being at most 2.5, and treating the mixture in a high-speed
mixer/granulator having both a stirring action and a cutting action. The obtained
granular detergent composition has good powder dissolution properties, a good softening
in the wash performance and a good storage stability.