Back to results
US 6,147,043 AGranted
Machine dishwashing detergents with silver protection
AssigneeHenkel Kommanditgesellschaft auf Aktien
InventorsHinrich Moeller, Helmut Blum, Christian Nitsch, Juergen Haerer
Life of this patent
Estimating the term…
Abstract
In machine dishwashing using low-alkaline detergents, the protection of silver was to be guaranteed. This was achieved by using 3-amino-5-alkyl-1,2,4-triazoles and salts thereof as silver protectors in machine dishwashing detergents. In addition, the dishwashing detergents may contain bleaching agents and builders.
Claims12
A dishwashing detergent comprising:
- (a) 10% to 90% by weight of a builder;
- (b) 1% to 35% by weight of a bleaching compound;
- and
- (c) 0.001% to 0.04% by weight of a 3-amino-1,2,4-triazole of the formula I or mixture of 3-amino-1,2,4-triazoles of the formula I:
- ##STR2## or a salt thereof with an organic or inorganic acid wherein the acid is selected from the group consisting of hydrochloric, sulfuric, phosphoric, carbonic, sulfurous, acetic, glycolic, citric, and succinic acids and mixtures thereof, R is selected from the group consisting of C.sub.1 to C.sub.15 linear or branched, saturated or unsaturated, optionally hydroxy- or alkoxy-substituted alkyl groups and optionally hydroxy-, alkoxy-, alkylthio-, thiol-, or 1.degree., 2.degree., or 3.degree. amino-substituted aryl, furyl, tetrahydrofuryl, thienyl, pyridyl, pyrrolidinyl, 5-oxo-2-pyrrolidinyl, pyrryl, imidazolyl, and pyrimidyl groups.
2 more elements
A dishwashing detergent consisting essentially of:
- (a) 10% to 90% by weight of a builder;
- (b) 1% to 35% by weight of a bleaching compound;
- and
- (c) 0.001% to 0.04% by weight of a 2-amino-1,2,4-triazole or of the formula I mixture of3-amino-1,2,4-triazoles of the formula I:
- ##STR3## or a salt thereof with an organic or inorganic acid where the acid is selected from the group consisting of hydrochloric, sulfuric, phosphoric, carbonic, sulfurous, acetic, glycolic, citric, and succinic acids and mixtures thereof, R is selected from the group consisting of C.sub.1 to C.sub.15 linear or branched, saturated or unsaturated, optionally hydroxy- or alkoxy-substituted alkyl groups and hyroxy-, alkoxy-, alkylthio-, thiol-, or 1.degree., 2.degree., or3.degree. amino-substituted aryl, furyl, tetrahydrofuryl, thienyl, pyridyl, pyrrolidinyl, 5-oxo-2-pyrrolidinyl, pyrryl, imidazolyl, and pyrimidyl groups.
2 more elements
Dependencies are inferred from the claim text.