| (19) |
 |
|
(11) |
EP 0 342 177 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
10.10.1990 Bulletin 1990/41 |
| (43) |
Date of publication A2: |
|
15.11.1989 Bulletin 1989/46 |
| (22) |
Date of filing: 10.05.1989 |
|
|
| (84) |
Designated Contracting States: |
|
BE DE FR GB IT NL SE |
| (30) |
Priority: |
12.05.1988 US 193320
22.12.1988 US 288738
26.04.1989 US 341918
|
| (71) |
Applicant: THE PROCTER & GAMBLE COMPANY |
|
Cincinnati,
Ohio 45202 (US) |
|
| (72) |
Inventors: |
|
- Showell, Michael Stanford
Cincinnati
Ohio 45224 (US)
- Wertz, William Conrad
Lawrenceburg
Indiana 47025 (US)
|
| (74) |
Representative: Canonici, Jean-Jacques et al |
|
Procter & Gamble European Technical Center N.V.
Temselaan 100
1853 Strombeek-Bever
1853 Strombeek-Bever (BE) |
|
| |
|
| (54) |
Heavy duty liquid laundry detergents containing anionic and nonionic surfactant, builder
and proteolytic enzyme |
(57) Heavy duty liquid laundry detergent compositions containing synthetic anionic and
ethoxylated nonionic surfactant, detergency builder, specific proteolytic enzyme,
an enzyme stabilization system, and water are disclosed. The compositions have a pH
in a 10% by weight solution in water at 20°C of between about 7.0 and 9.0, a Critical
Micelle Concentration of less than or equal to about 200 ppm, and an air/water Interfacial
Tension above the Critical Micelle Concentration of less than or equal to about 32
dynes/cm at 35°C in distilled water. The compositions are preferably clear, homogeneous,
stable and provide good cleaning performance, particularly through-the-wash on enzyme-sensitive
stains.