| (19) |
 |
|
(11) |
EP 0 270 240 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
03.01.1990 Bulletin 1990/01 |
| (43) |
Date of publication A2: |
|
08.06.1988 Bulletin 1988/23 |
| (22) |
Date of filing: 29.10.1987 |
|
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| (84) |
Designated Contracting States: |
|
CH DE ES FR GB IT LI NL SE |
| (30) |
Priority: |
31.10.1986 GB 8626082
|
| (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: |
|
- Appel, Peter Willam
NL-3062 DG Rotterdam (NL)
- Bazley, Michael Raymond Frederick
Hale
Altrincham
Cheshire (GB)
- Euser, Huug
NL-3135 GW Vlaardingen (NL)
- Liem, Seeng Djiang
NL-3161 VR Rhoon (NL)
- Paoli, Michele Emilio
NL-3761 CW Soest (NL)
|
| (74) |
Representative: Geary, Stephen et al |
|
Unilever Plc,
Patent Division,
Colworth House
Sharnbrook,
Bedford MK44 1LQ
Sharnbrook,
Bedford MK44 1LQ (GB) |
|
| |
|
|
|
Remarks: |
|
The title of the invention has been amended (Guidelines for Examination in the EPO,
A-III, 7.3). |
|
| (54) |
Detergent powders and process for preparing them |
(57) A spray-dried zero-phosphate powder suitable as a base for a detergent composition
contains anionic surfactant, optional nonionic surfactant, aluminosilicate builder,
polymeric polycarboxylate and a low or zero level of electrolyte, preferably sodium
carbonate. The powder has a particle porosity of less than 0.40. If desired, sodium
sulphate or other solids of small particle size and high bulk density may be postdosed
to the spray-dried powder to give detergent compositions of very high bulk density.