(19)
(11) EP 0 273 775 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
26.04.1989 Bulletin 1989/17

(43) Date of publication A2:
06.07.1988 Bulletin 1988/27

(21) Application number: 87311536.4

(22) Date of filing: 31.12.1987
(51) International Patent Classification (IPC)4: C11D 3/42, C11D 3/395, C11D 3/40, C11D 3/50
(84) Designated Contracting States:
AT BE CH DE ES FR GB GR IT LI LU NL SE

(30) Priority: 31.12.1986 GB 8631101
08.10.1987 GB 8723616

(71) Applicant: Albright & Wilson Limited
Oldbury Warley West Midlands, B68 ONN (GB)

(72) Inventors:
  • Messenger, Edward Tunstall
    Workington, Cumbria (GB)
  • Martin, Anthony
    Workington, Cumbria (GB)

(74) Representative: Savidge, Roger Gordon Madgwick et al
ALBRIGHT & WILSON UK LIMITED Patents Department P O Box 3 210-222 Hagley Road
Oldbury, Warley, West Midlands B68 0NN
Oldbury, Warley, West Midlands B68 0NN (GB)


(56) References cited: : 
   
       


    (54) Protected optical brighteners


    (57) Protected additives for use in cleaning compositions such as liquid laundry detergents comprises an optical brightener, bleach, photoactive bleach, perfume, blueing agent or dye dispersed in, or coated with, a hydrophobic substance such as silicone oil or a hydrocarbon, which is insoluble in concentrated liquid detergent but which is disrupted under normal cleaning conditions.





    Search report