EP 0730628 B1 19980325 - LIMESCALE REMOVING COMPOSITION
Title (en)
LIMESCALE REMOVING COMPOSITION
Title (de)
ZUSAMMENSETZUNG ZUM ENTFERNEN VON KESSELSTEIN
Title (fr)
COMPOSITION PERMETTANT D'ENLEVER DES DEPOTS CALCAIRES
Publication
Application
Priority
- EP 9403790 W 19941112
- GB 9324126 A 19931124
- GB 9412377 A 19940621
Abstract (en)
[origin: WO9514756A1] The invention provides limescale-removing compositions of pH 1-4, comprising maleic acid, a nonionic surfactant, an anionic surfactant, a perfume and an alpha-hydroxy carboxylic acid (preferably citric acid). It is believed that the combination of alpha-hydroxy carboxylic acid with maleic acid is less toxic and less prone to decomposition than an equivalent amount of maleic acid, i.e. an amount which provides comparable limescale-removing performance. However, it is also believed that the alpha-hydroxy carboxylic acid interacts with the nonionic surfactant to destabilise the product in the absence of the anionic surfactant. Thus, there is believed to a synergistic interaction between the components which provides a stable and effective composition containing the alpha-hydroxy fatty acid as a partial replacer for the maleic acid.
IPC 1-7
IPC 8 full level
C11D 1/83 (2006.01); C11D 3/20 (2006.01); C11D 1/14 (2006.01); C11D 1/72 (2006.01)
CPC (source: EP)
C11D 1/83 (2013.01); C11D 3/2082 (2013.01); C11D 3/2086 (2013.01); C11D 1/143 (2013.01); C11D 1/72 (2013.01)
Designated contracting state (EPC)
CH DE ES FR GB IT LI NL SE
DOCDB simple family (publication)
WO 9514756 A1 19950601; AU 678313 B2 19970522; AU 8143694 A 19950613; BR 9408132 A 19970805; CA 2175677 A1 19950601; DE 69409254 D1 19980430; DE 69409254 T2 19980716; EP 0730628 A1 19960911; EP 0730628 B1 19980325; ES 2113723 T3 19980501
DOCDB simple family (application)
EP 9403790 W 19941112; AU 8143694 A 19941112; BR 9408132 A 19941112; CA 2175677 A 19941112; DE 69409254 T 19941112; EP 95900745 A 19941112; ES 95900745 T 19941112