Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – Specific organic component
Reexamination Certificate
2000-01-28
2001-05-22
Gupta, Yogendra (Department: 1751)
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
Specific organic component
C510S509000, C510S485000, C510S531000, C510S532000, C510S533000, C510S534000, C510S276000, C510S289000, C510S300000, C510S315000, C510S334000, C510S367000, C510S377000, C510S443000, C510S444000, C510S507000, C510S511000
Reexamination Certificate
active
06235704
ABSTRACT:
The present invention relates to a solid textile detergent formulation comprising carbonate-based inorganic builders (possibly with a small amount of silicate and phosphate builders), glycine-N,N-diacetic acid derivatives as organic builder components and also surfactants and, if desired, further customary constituents.
Inorganic silicon-containing builders, such as alumosilicates (zeolites) or silicates, are essential constituents of conventional reduced-phosphate or phosphate-free powder detergents. Their content is usually from 10 to 45% by weight. Their primary purpose in the washing process is to reduce water hardness, as a result of which the washing performance, specifically of the anion surfactants, is increased and at the same time the extent of fabric deposits (incrustations), consisting of insoluble calcium salts and magnesium salts, is reduced. In the case of builders which are insoluble or partially soluble in the wash water (eg. zeolites, crystalline sheet silicates), there is in principle, however, the danger that builder particles are deposited on the fabric and thus contribute to incrustation. Water-soluble inorganic silicate builders (eg. amorphous disilicates) do not act as ion exchangers as the zeolites do, but precipitate the calcium ions and magnesium ions as insoluble silicates. Again, there is the danger of fabric incrustation by silicate. Furthermore, the insoluble builders make a not inconsiderable contribution to the amount of sludge produced in waste treatment plants.
Use of biodegradable glycine-N,N-diacetic acid derivatives allows the content of such inorganic builders to be greatly reduced and at the same time the detergency to be increased. In particular, the formation of fabric incrustations is advantageously inhibited. In addition, the total content of biodegradable components in the detergent formulation increases, as does the overall solubility of the detergent. Furthermore, by reducing the amount of inorganic builders, it is possible to prepare particularly highly concentrated compact solid detergent formulations having a distinctly reduced volume.
WO-A 97/19159 has already disclosed the use of said glycine-N,N-diacetic acid derivatives in solid textile detergent formulations. This patent describes solid textile detergent formulations comprising from 1 to 60% by weight of inorganic builders based on silicates, carbonates and phosphates, the silicate content being from 13 to 36% by weight.
It is an object of the present invention to provide a solid textile detergent formulation in which the content of inorganic builders based on alumosilicates and/or silicates is greatly reduced.
We have found that this object is achieved by a solid textile detergent formulation which comprises
(A) from 1 to 30% by weight of inorganic builders based on carbonates,
(B) from 0 to 12% by weight of inorganic builders based on crystalline or amorphous alumosilicates and/or crystalline or amorphous silicates,
(C) from 0 to 5% by weight of inorganic builders based on phosphates,
(D) from 1 to 40% by weight of one or more glycine-N,N-diacetic acid derivatives of the formula I
where
R is C
1
- to C
30
-alkyl or C
2
- to C
30
-alkenyl each of which is unsubstituted or substituted by up to 5 hydroxyl, sulfate, sulfonate, formyl, C
1
- to C
4
-alkoxy, phenoxy or C
1
- to C
4
-alkoxycarbonyl groups, and may be interrupted by up to 5 nonadjacent oxygen and/or nitrogen atoms, R is furthermore alkoxylate of the formula —(CH
2
)
k
—O—(A
1
O)
m
—(A
2
O)
n
—Y, where A
1
and A
2
, independently of one another, are 1,2-alkylene having from 2 to 4 carbon atoms, Y is hydrogen, C
1
- to C
12
-alkyl, phenyl, C
1
- to C
4
-alkoxycarbonyl or sulfo, k is 1, 2 or 3, and m and n are each from 0 to 50, where the sum m+n must be at least 2, phenylalkyl having from 1 to 20 carbon atoms in the alkyl moiety, a five- or six-membered unsaturated or saturated heterocyclic ring having up to three heteroatoms from the group consisting of nitrogen, oxygen and sulfur, which may, in addition, be benzo-fused, where all the phenyl and heterocyclic rings given in the meanings for R are unsubstituted or substituted by up to three C
1
- to C
4
-alkyl, hydroxyl, carboxyl, sulfo or C
1
- to C
4
-alkoxycarbonyl groups, or is a radical of the formula
where A is a C
1
- to C
12
-alkylene bridge or a chemical bond, and
M is hydrogen, alkali metal, alkaline earth metal, ammonium or substituted ammonium in the corresponding stoichiometric quantities,
as organic builder component,
(E) from 0 to 40% by weight of anionic surfactants and
(F) from 0.5 to 50% by weight of nonionic surfactants.
The sum of all the detergent components given above and below is at most 100% by weight, including residual quantities of water.
Suitable inorganic carbonate-based builder substances (A) are carbonates and hydrogencarbonates. These can be employed in the form of their alkali metal, alkaline earth metal or ammonium salts. Preference is given to carbonates and hydrogencarbonates of Na, Li and Mg, in particular sodium carbonate and/or sodium hydrogencarbonate.
Suitable inorganic builders (B) are in particular crystalline or amorphous alumosilicates having ion exchange properties, such as, in particular, zeolites. A variety of zeolite types are suitable, in particular zeolites A, X, B, P, MAP and HS in their Na form or in forms in which Na has partially been replaced by other cations, such as Li, K, Ca, Mg or ammonium. Suitable zeolites are described in EP-A 038 591, EP-A 021 491, EP-A 087 035, U.S. Pat. No. 4,604,224, GB-A 20 13 259, EP-A 522 726, EP-A 384 070 and WO-A 94/24251, for example.
Examples of suitable crystalline silicates (B) are disilicates or sheet silicates, eg. &dgr;-Na
2
Si
2
O
5
or &bgr;-Na
2
Si
2
O
5
(SKS 6 and SKS 7, Hoechst). The silicates can be used in the form of their alkali metal, alkaline earth metal or ammonium salts, preferably as Na, Li and Mg silicates. Amorphous silicates, for example sodium metasilicate, which has a polymeric structure, or amorphous disilicate (Britesil® H 20, Akzo) can also be used.
Phosphates which are customarily used as inorganic builders (C) are polyphosphates, for example pentasodium triphosphate.
Component (A) is preferably present in the textile detergent formulation according to the invention in an amount of from 5 to 27% by weight, in particular from 10 to 25% by weight.
Component (B) is preferably employed in amounts of from 0 to 10% by weight, in particular from 0 to 8% by weight. Good results are obtained using quantities of from 1.5 to 8% by weight, in particular from 2 to 6% by weight, of component (B) in the detergent formulation. However, the desired advantages and effects for the purposes of the present invention are also achieved if component (B) is not present or is present in very small amounts, ie. from 0 to 0.5% by weight, in the detergent formulation.
Component (C), which is of less importance for the effect, according to the invention, of the detergent formulation, is preferably present in amounts of from 0.05 to 2% by weight, in particular from 0.1 to 1% by weight, or can be omitted altogether.
In a preferred embodiment, component (D) comprises those compounds I in which R is a radical having at least 5 carbon atoms.
In a particularly preferred embodiment, component (D) comprises those glycine-N,N-diacetic acid derivatives I in which R is linear or branched unsubstituted C
5
- to C
20
-alkyl or C
5
- to C
20
-alkenyl, which may be interrupted by up to 5 nonadjacent oxygen and/or nitrogen atoms; said nitrogen atoms may carry hydrogen or C
1
- to C
8
-alkyl groups. Compounds I are used in the form of the free acids or their alkali metal, alkaline earth metal, ammonium and substituted ammonium salts. Salts of this type which are especially suitable are the sodium, potassium and ammonium salts, in particular the trisodium, tripotassium and triammonium salts, and also organic triamine salts having a tertiary nitrogen atom.
Particularly suitable parent bases for the organic amine salts are tertiary amines, such as trialkylamines having from 1 to 6 carbo
Baur Richard
Bertleff Werner
Detering Jurgen
Oetter Gunter
Rahm Rainer
BASF - Aktiengesellschaft
Boyer Charles
Gupta Yogendra
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
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