| (19) |
 |
|
(11) |
EP 0 686 693 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
04.09.1996 Bulletin 1996/36 |
| (43) |
Date of publication A2: |
|
13.12.1995 Bulletin 1995/50 |
| (22) |
Date of filing: 12.05.1995 |
|
|
| (84) |
Designated Contracting States: |
|
CH DE ES FR GB IT LI NL SE |
| (30) |
Priority: |
07.06.1994 GB 9411349
|
| (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: |
|
- Bolzoni, Guiseppe
I-20070 S. Rocco Al Porto,
Milano (IT)
- Butterworth, Robert Michael
I-20090 Rodano,
Milano (IT)
|
| (74) |
Representative: Elliott, Peter William et al |
|
Unilever plc
Patent Division
Colworth House
Sharnbrook
Bedford MK44 1LQ
Bedford MK44 1LQ (GB) |
|
| |
|
| (54) |
Cleaning composition and cleaning process |
(57) A package containing a cleaning composition for pretreatment of baked on soil, said
composition comprising:
a) at least 2%wt of a surfactant, preferably a primary alcohol sulphate having a chain
length of C10-C14,
b) 0.01-5.00 of a metal-complexing agent (such as an amino phosphonic acid),
wherein the pH of the neat composition is below 13.0 and the pH at an aqueous dilution
of 1% is greater than 10. The invention also relates to a method of cleaning baked
on soil from surfaces which comprises the steps of: treating the surface with a composition
as described above in substantially undilute form, whereby the baked-on soil is loosened
from the surface, and, treating the surface with a second surfactant-containing composition,
said second surfactant containing composition comprising less than 2% of surfactant.