(19) |
 |
|
(11) |
EP 0 419 036 A3 |
(12) |
EUROPEAN PATENT APPLICATION |
(88) |
Date of publication A3: |
|
01.04.1992 Bulletin 1992/14 |
(43) |
Date of publication A2: |
|
27.03.1991 Bulletin 1991/13 |
(22) |
Date of filing: 17.08.1990 |
|
|
(84) |
Designated Contracting States: |
|
CH DE ES FR GB IT LI NL SE |
(30) |
Priority: |
21.08.1989 GB 8918984
|
(71) |
Applicants: |
|
- UNILEVER PLC
London EC4P 4BQ (GB)
GB
- UNILEVER N.V.
NL-3013 AL Rotterdam (NL)
CH DE ES FR IT LI NL SE
|
|
(72) |
Inventors: |
|
- Barber, Alan Dan,
Unilever Research Port Sunlight
Bebington,
Wirral,
Merseyside L63 3JW (GB)
- Chapple, Andrew Paul
Unilever Res.Port Sunlight
Bebington,
Wirral,
Merseyside L63 3JW (GB)
- Praefke, Katja Ellen
D-2000 Hamburg 76 (DE)
|
(74) |
Representative: Fransella, Mary Evelyn et al |
|
Unilever PLC
Patent Division
Colworth House
Sharnbrook Bedford MK44 1LQ Bedford MK44 1LQ (GB) |
|
|
|
|
|
Remarks: |
|
The title of the invention has been amended (Guidelines for Examination in the EPO,
A-III, 7.3). |
|
(54) |
Detergency builder additive and detergent system containing it |
(57) A detergency builder additive, for boosting the detergency of a main wash powder
in hard water, comprises alkali metal aluminosilicate (at least 50 wt%), sodium carbonate
(15-20 wt%) and an organic sequestrant (2-12 wt%), preferably citrate. The builder
additive may form part of a Baukasten (building block) detergent system comprising
as separately packaged components a main wash powder, a builder additive, and optionally
a bleach additive.