Global Patent Index - EP 1004658 A3

EP 1004658 A3 2000-08-09 - Washing agent containing citric acid

Title (en)

Washing agent containing citric acid

Title (de)

Citronensäurehaltiges Waschmittel

Title (fr)

Agent de lavage comprenant de l'acide citrique

Publication

EP 1004658 A3 (DE)

Application

EP 99122631 A

Priority

DE 19854083 A

Abstract (en)

[origin: EP1004658A2] The stain removal properties of washing agents with a bleach content of less than 10 wt. % are improved by incorporation of citric acid and another organic acid in a mixture of coarse and fine grains. A washing agent with less than 10 wt. % bleaching agent contains citric acid as separate or subsequently added component to promote the removal of bleachable stains. The citric acid has a particle size distribution such that at least 80 wt. % of the particles have a size of 1500-2000 mu m. As well as the coarse grain citric acid, an additional organic acid (I), which is also a separate or subsequently added component, is present. (I) has a particle size distribution such that at least 80 wt.% of the particles have a size of less than 450 mu m. Anionic and/or nonionic detergents and builders are also present. 10-30 wt. % of the total acid particles have a size of 1750-2000 mu m and 10-30 wt. % have a size of less than 150 mu m.

IPC 1-7 (main, further and additional classification)

C11D 3/39; C11D 3/20; C11D 3/395; C11D 17/06

IPC 8 full level (invention and additional information)

C11D 3/20 (2006.01); C11D 3/39 (2006.01); C11D 3/395 (2006.01)

CPC (invention and additional information)

C11D 3/2086 (2013.01); C11D 3/39 (2013.01); C11D 3/395 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

DE 19854083 A1 20000525; EP 1004658 A2 20000531; EP 1004658 A3 20000809

INPADOC legal status


2002-12-11 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20020601

2001-04-25 [AKX] PAYMENT OF DESIGNATION FEES

- Free text: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2000-08-09 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A3

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2000-08-09 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Free text: AL;LT;LV;MK;RO;SI

2000-05-31 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 19991113

2000-05-31 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A2

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2000-05-31 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Free text: AL;LT;LV;MK;RO;SI