| (19) |
 |
|
(11) |
EP 2 031 046 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
02.09.2009 Bulletin 2009/36 |
| (43) |
Date of publication A2: |
|
04.03.2009 Bulletin 2009/10 |
| (22) |
Date of filing: 29.10.2007 |
|
| (51) |
International Patent Classification (IPC):
|
|
| (84) |
Designated Contracting States: |
|
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO
SE SI SK TR |
|
Designated Extension States: |
|
AL BA HR MK RS |
| (30) |
Priority: |
30.08.2007 IN MU16602007
|
| (71) |
Applicant: Unilever PLC |
|
London
Greater London EC4P 4BQ (GB) |
|
| (72) |
Inventors: |
|
- Batchelor, Stephen Norman,
Wirral Merseyside CH63 3JW, (GB)
- Geerse, Kees Bert,
3133 AT Vlaardingen (NL)
- Hermant, Roelant Mathijs,
3133 AT Vlaardingen (NL)
- Million, Mahider,
3133 AT Vlaardingen (NL)
- Pareek, Vivek,
Mumbai 400 099, (IN)
- Van Der Weg, Pieter Broer,
3133 AT Vlaardingen (NL)
- Van Zelm, Barry,
3133 AT Vlaardingen (NL)
|
| (74) |
Representative: Elliott, Peter William |
|
Unilever Patent Group
Colworth House
Sharnbrook
Bedford
MK44 1LQ
Sharnbrook
Bedford
MK44 1LQ (GB) |
|
| |
|
(57) The present invention provides a product and method of whitening the appearance of
a detergent powder formulation, especially when incorporating more yellow linear alkyl
benzene sulphonates. The formulation comprises
(a) from 4 to 50 wt.% of a linear alkyl benzene sulphonate, wherein the optical absorption
of a 3.5 g/l solution of the linear alkyl benzene sulphonate at 400 nm in water in
a 5 cm cell is between 0.005 to 0.2;
(b) from 0 to 0.5 wt.% of fluorescer
(c) from 0.00001 to 0.0007 wt.% of a colourant that is a blue pigment or a blue dye.