(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

(21) Application number: 90309051.2

(22) Date of filing: 17.08.1990
(51) International Patent Classification (IPC)5C11D 3/12, C11D 3/10, C11D 3/20, C11D 3/37, C11D 11/00
(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)


(56) References cited: : 
   
     
    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.





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