(19)
(11) EP 0 808 893 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
03.12.1997 Bulletin 1997/49

(43) Date of publication A2:
26.11.1997 Bulletin 1997/48

(21) Application number: 97107976.9

(22) Date of filing: 16.05.1997
(51) International Patent Classification (IPC)6: C11D 3/42
(84) Designated Contracting States:
DE ES GB

(30) Priority: 21.05.1996 IT MI961019

(71) Applicant: 3V SIGMA S.p.A
I-20121 Milano (IT)

(72) Inventor:
  • Polotti, Gianmarco
    24121 Bergamo (IT)

(74) Representative: Spadaro, Marco 
Studio Consulenza Brevettuale, Via Rossini 8
20122 Milano
20122 Milano (IT)

   


(54) A method for whitening a detergent composition


(57) The use of brighteners of formula

wherein R and R1, which can be the same or different from each other, are each -H, CH3, -CH2CH3, -CH2-CH2OH; X is the cation of sodium, potassium, ammonium, an amine or an alkanolamine residue, in the brightener of some kinds of detergent products.
The presence of the brighteners of formula (I) satisfactorily solves the problem of increasing the whiteness degree of the paste, or, in the case of a powder detergent, of the granules obtained after atomization.





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