Metal complexes-containing dishwashing detergents
Dishwashing detergents containing a metal complex of the general formula (I) (A q+ ) p [M s+ L m− ](X o− ) r (I) and related methods.
1 . A dishwashing detergent comprising:
a metal complex of the general formula (I),
(
A
q
+
)
p
[
M
s
+
L
m
-
]
(
X
o
-
)
r
(
I
)
wherein:
q is 1 or 2,
A q+ represents a cation selected from the group consisting of alkali metal cations where q=1, ½ alkaline earth cations where q=2, and ammonium ions where q=1,
M s+ represents an aluminum ion, a transition metal ion, or a lanthanide metal ion,
s is a number from 1 to 5,
L represents a ligand of the formula (II),
wherein:
each R 1 and R 2 independently of each other is selected from the group consisting of H, unsubstituted or substituted, linear or branched C 1-20 alkyl, unsubstituted or substituted, linear or branched C 1-20 heteroalkyl, unsubstituted or substituted aryl, unsubstituted or substituted heteroaryl, unsubstituted or substituted, linear or branched C 2-20 alkenyl, unsubstituted or substituted, linear or branched C 2-20 heteroalkenyl, unsubstituted or substituted, linear or branched C 2-20 alkinyl, unsubstituted or substituted, linear or branched alkylaryl, and unsubstituted or substituted, linear or branched alkylheteroaryl, and
each R 3 independently of each other represents CH 2 COOH or CH 2 COO − ,
n is 0 or 1,
X o− represents an anion selected from the group consisting of F − , Cl − , Br − , I − , OH − , HSO 3 − , SO 3 2− , SO 4 2− , HSO 4 − , NO 2 − , NO 3 − , PO 4 3− , HPO 4 2− , H 2 PO 4 − , BF 4 − , PF 6 − , ClO 4 − , acetate, citrate, formate, glutarate, lactate, malate, malonate, oxalate, pyruvate, tartrate, methane sulfonate, methyl sulfate, p-toluene sulfate, and succinate,
m is a number from 0 to 5,
is a number from 1 to 3, and
p and r are independently of each other a number from greater than 0 to 6, such that the sum of s and the product of p and q is equal to the sum of m and the product of r and o, and further such that the charge of formula (II) resulting from the radicals R 1 , R 2 and R 3 is neutral or negative.
2 . The detergent of claim 1 , wherein M s+ is selected from the group consisting of Al 3+ , Ti 4+ , Y 3+ , Zr 4+ , Ce 3+ , Ce 4+ , Sc 3+ , Yb 3+ , and any mixture thereof.
3 . The detergent of claim 1 , wherein each R 1 and R 2 is independently selected from the group consisting of —COOH, —COO, —SH, —SO 3 H, —SO 3 − , —C(O)R 4 , —OR 4 , and —(NR 5 R 6 R 7 R 8 ) + , wherein:
R 4 represents H or linear or branched C 1-6 alkyl, and
R 5 to R 8 independently of each other represent linear or branched C 1-6 alkyl groups.
4 . The detergent of claim 1 , wherein n is 0 in the ligand of the general formula (II).
5 . The detergent of claim 1 , wherein the detergent comprises from 0.001 wt. % to 10 wt. % of the metal complex of the general formula (I), based on the total weight of the detergent.
6 . The detergent of claim 5 , wherein the detergent comprises from 0.01 wt. % to 3 wt. % of the metal complex of the general formula (I), based on the total weight of the detergent.
7 . A method of washing dishes in an automatic dishwasher, the method comprising introducing the detergent of claim 1 into an interior of the automatic dishwasher.
8 . The detergent of claim 1 , further comprising a surfactant.
9 . The detergent of claim 8 , wherein the surfactant is a non-ionic surfactant.
10 . The detergent of claim 9 , wherein the non-ionic surfactant is present in an amount of at least 2 wt %, based on the total weight of the detergent.
11 . The detergent of claim 9 , wherein the non-ionic surfactant is an alkyl glycoside of general formula RO(G) x ,
wherein:
R represents a primary straight-chain or methyl-branched aliphatic radical,
G represents a glycose unit having 5 or 6 carbon atoms, and
x, which indicates the distribution of monoglycosides and oligoglycosides, is from 1 to 10.
12 . The detergent of claim 11 , wherein G is glucose.
13 . The detergent of claim 11 , wherein x is from 1.2 to 1.4.
14 . The detergent of claim 8 , wherein the surfactant is an anionic surfactant.
15 . The detergent of claim 1 , further comprising at least one of a builder, an enzyme, a thickener, a sequestering agent, an electrolyte, a corrosion inhibitor, a foam inhibitor, a dye, a fragrance, a bitter substance, an antimicrobial agent, or a disintegration aid.
16 . The detergent of claim 15 , wherein the corrosion inhibitor is a silver protectant or a glass corrosion inhibitor.
17 . A dishwashing unit comprising:
a water-soluble wrapping; and
the detergent of claim 1 contained within the water-soluble wrapping.
18 . A dishwashing detergent comprising:
a non-ionic surfactant comprising an alkyl glycoside of general formula RO(G) x ,
wherein: R represents a primary straight-chain or methyl-branched aliphatic radical, G represents a glycose unit having 5 or 6 carbon atoms, and
X, which indicates the distribution of monoglycosides and oligoglycosides, is from 1 to 10; and a metal complex of the general formula (I), (A q+ ) p [M s+ L m− ](X o− ) r (I)
wherein:
q is 1 or 2,
A q+ represents a cation selected from the group consisting of alkali metal cations where q=1, ½ alkaline earth cations where q=2, and ammonium ions where q=1,
M s+ represents an aluminum ion, a transition metal ion, or a lanthanide metal ion,
s is a number from 1 to 5,
L represents a ligand of the formula (II),
wherein:
each R 1 and R 2 independently of each other is selected from the group consisting of H, unsubstituted or substituted, linear or branched C 1-20 alkyl, unsubstituted or substituted, linear or branched C 1-20 heteroalkyl, unsubstituted or substituted aryl, unsubstituted or substituted heteroaryl, unsubstituted or substituted, linear or branched C 2-20 alkenyl, unsubstituted or substituted, linear or branched C 2-20 heteroalkenyl, unsubstituted or substituted, linear or branched C 2-20 alkinyl, unsubstituted or substituted, linear or branched alkylaryl, and unsubstituted or substituted, linear or branched alkylheteroaryl, and
each R 3 independently of each other represents CH 2 COOH or CH 2 COO − ,
n is 0 or 1,
X o− represents an anion selected from the group consisting of F − , Cl − , Br − , I − , OH − , HSO 3 − , SO 3 2− , SO 4 2− , HSO 4 − , NO 2 − , NO 3 − , PO 4 3− , HPO 4 2− , H 2 PO 4 − , BF 4 − , PF 6 − , ClO 4 − , acetate, citrate, formate, glutarate, lactate, malate, malonate, oxalate, pyruvate, tartrate, methane sulfonate, methyl sulfate, p-toluene sulfate, and succinate,
m is a number from 0 to 5,
is a number from 1 to 3, and
p and r are independently of each other a number from 0 to 6, such that the sum of s and the product of p and q is equal to the sum of m and the product of r and o, and further such that the charge of formula (II) resulting from the radicals R 1 , R 2 and R 3 is neutral or negative.