| (19) |
 |
|
(11) |
EP 0 534 525 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
01.09.1993 Bulletin 1993/35 |
| (43) |
Date of publication A2: |
|
31.03.1993 Bulletin 1993/13 |
| (22) |
Date of filing: 11.09.1992 |
|
|
| (84) |
Designated Contracting States: |
|
CH DE ES FR GB IT LI NL SE |
| (30) |
Priority: |
27.09.1991 GB 9120657
|
| (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: |
|
- Akay, Galip
Sidmouth EX10 8SU (GB)
- Chapple, Andrew Paul ,
Unilever Research
Wirral,
Merseyside L63 3JW (GB)
- Garrett, Peter Robert,
Unilever Resaerch
Wirral,
Merseyside L63 3JW (GB)
- Knight, Peter Cory,
Unilever Resaerch
Wirral,
Merseyside L63 3JW (GB)
- Yorke, John William H.,
Unilever Resaerch
Wirral,
Merseyside L63 3JW (GB)
|
| (74) |
Representative: Geary, Stephen et al |
|
Unilever Plc,
Patent Division,
Colworth House
Sharnbrook,
Bedford MK44 1LQ
Sharnbrook,
Bedford MK44 1LQ (GB) |
|
| |
|
| (54) |
Detergent powders and process for preparing them |
(57) The dispensing properties of detergent compositions having a bulk density of 650-1100
kg/m³ and comprising anionic and/or nonionic surfactants, and builder material, may
be substantially improved by including in the compositions from 5 to 30% by weight
of sodium carbonate and/or -bicarbonate and/or -sesquicarbonate, and from 1 to 15%
by weight of particulate citric acid, whereby more than 80% by weight of the citric
acid has a particle size which is in the range of from 350 to 1500 µm.