Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Reexamination Certificate
2002-06-21
2004-02-17
Gupta, Yogendra N. (Department: 1751)
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
For cleaning a specific substrate or removing a specific...
C510S292000
Reexamination Certificate
active
06693069
ABSTRACT:
The present invention relates to the use of peracid-containing combinations for the disinfecting washing of textiles and to special peracid-containing textile and wool disinfectants and to processes for the gentle disinfecting washing of textiles.
It is known from the prior art that peracid compounds can be used in the washing of textiles. The peracid compounds normally used can have a disinfecting effect, depending on the particular type of peracid compound and the temperature and concentration used in the washing process.
It is also known from the prior art that textiles or textile fibers are permanently damaged in the washing process if peracids, for example peracetic acid, are used. This applies particularly to the washing of delicate textiles consisting of materials such as wool, silk, polyacrylics, viscose, polyamide, acetate and lyocell.
The extent of the damage is additionally influenced by the conditions of the washing process such as mechanics, temperature, time, concentration and type of chemistry.
Textiles are damaged to a greater or lesser extent, depending on the conditions. In the case of woolen textiles, vigorous mechanical action causes the textile fibers to hook together irreversibly, causing wool to shrink considerably. The washing conditions also determine whether and to what extent the polymer structure of the textiles is changed. A change to the polymer structure reduces the tensile strength of textiles. In the case of wool, this results in increased alkali solubility.
To solve this problem, the disinfecting washing process has to be carried out under particularly gentle conditions.
It is known from the prior art that the fiber-damaging effect can be reduced by lowering the temperature. Furthermore, a light-duty detergent which is less harmful to the textile fibers is generally used for the washing of delicate textiles.
Nevertheless the addition of sufficiently effective amounts of peracid compounds, even when combined with conventional light-duty detergents, leads to the above-described drawbacks in the disinfecting washing process, even at low washing temperatures, such as 30° C. to 40° C.
For this reason, other active ingredients for the disinfecting washing of textiles have been investigated in the prior art.
It has been found that disinfectants based on quaternary ammonium compounds do not generally have an adequate disinfecting effect during disinfecting washing at low temperatures. Pronounced damage to textiles is observed during experiments using disinfectants based on aldehydes.
Accordingly, the problem addressed by the present invention was to enable textiles and particularly delicate textiles to be subjected to disinfecting washing at low temperatures with minimal damage to the textiles or textile fibers.
The present invention relates to the use of a disinfecting component containing a combination of peracid and
a) at least one fatty acid and/or
b) at least one hydrotrope and/or
c) at least one surfactant component and/or
d) at least one complexing component for the disinfecting washing of textiles.
The effect of using disinfecting components of this type is preferably that the degree of fiber damage in the disinfecting washing of textiles is less than it is where the corresponding peracids alone are used in the same quantities, even if they are added to the washing solution together with perborate-containing, fully-built or light-duty detergents which already contain fatty acids, hydrotropes or components having surfactant and/or complexing properties.
In a preferred embodiment of the present invention, the disinfecting components to be used according to the invention are used for the gentle disinfecting washing of textiles which are sensitive to oxidative disinfectants and/or heat.
In another preferred embodiment, textiles which are sensitive to oxidative disinfectants and/or heat are subjected to disinfecting washing at a temperature of 10 to 55° C. and more particularly at a temperature of 20 to 45° C.
The textiles which are sensitive to oxidative disinfectants and/or heat preferably contain materials selected from wool, acetate, lyocell, silk, viscose, acrylic fibers and polyamide.
The disinfecting components to be used in accordance with the invention are preferably used together with standard speciality, color, fully-built and light-duty detergents.
The disinfecting component to be used in accordance with the invention preferably contains as peracid a compound selected from
a) the peracids or salts of peracids corresponding to general formula I
R
2
—O
2
C—(CH
2
)
x
—CO
3
H (I)
in which R
2
is hydrogen or an alkyl group containing 1 to 4 carbon atoms, more particularly hydrogen and/or methyl, and x is a number of 1 to 4, and/or
b) phthalimidopercarboxylic acids (II) where the percarboxylic acid contains 1 to 18 carbon atoms and more particularly 1 to 8 carbon atoms, and/or
c) compounds corresponding to formula III:
R
1
—CO
3
H (III)
in which R
1
is an alkyl or alkenyl group containing 1 to 18 carbon atoms and more particularly 1 to 12 carbon atoms.
In a most particularly preferred embodiment of the present invention, the disinfecting component to be used in accordance with the invention contains one or more compounds selected from peracetic acid, perpropionic acid, peroctanoic acid, phthalimidoperhexanoic acid, phthalimidoperoctanoic acid, persuccinic acid, persuccinic acid monomethyl ester, perglutaric acid, perglutaric acid monomethyl ester, peradipic acid, peradipic acid monomethyl ester, persuccinic acid, persuccinic acid monomethyl ester.
In a preferred embodiment, an aqueous disinfecting washing solution in which the peracid content between 0.0001 and 2% by weight and more particularly between 0.001 and 0.2% by weight, based on the disinfecting washing solution as a whole, is produced by addition of the disinfecting component.
In another preferred embodiment of the present invention, an aqueous disinfecting washing solution additionally containing 0.0005 to 2% by weight and more particularly 0.005 to 0.8% by weight of hydrogen peroxide, based on the disinfecting washing solution as a whole, is produced by addition of the disinfecting component to be used in accordance with the invention.
Preferably, the disinfecting component additionally contains the non-oxidized acid corresponding to the peracid present and, in the case of the peracid esters, also the corresponding non-esterified form of the non-oxidized acid.
A fatty acid containing 8 to 12 carbon atoms, more particularly octanoic acid, is preferably present as the fatty acid in the disinfecting component to be used in accordance with the invention.
The hydrotrope is preferably selected from the group of anionic surfactants, preferably from the sulfonates/sulfonic acids and in particular from cumene, xylene, octyl, napthyl and alkylbenzenesulfonates/sulfonic acids, the alkyl group in the last of these containing between 6 and 16 carbon atoms.
The disinfecting component to be used in accordance with the invention preferably contains as surfactant component a compound selected from the groups consisting of anionic, cationic, nonionic, amphoteric surfactants, protein hydrolyzates, for example Lamepon types, alkylamine oxides, silicone compounds and phosphoric acid esters and salts thereof.
Cationized protein hydrolyzates are most particularly preferred in this connection. These are, for example, partly hydrolyzed collagens which, after modification with epichlorohydrin, are reacted with alkyl dimethylamine to form quaternary ammonium chloride. The alkyl group of the amine preferably contains 8 to 20 carbon atoms
Suitable anionic surfactants are any anionic surfactants commonly used in the field of detergents and cleaning agents, for example C
8
-C
18
alkyl sulfates, C
8
-C
18
alkyl ether sulfates, C
8
-C
18
alkanesulfonates, C
8
-C
18
-&agr;-olefin sulfonates, sulfonated C
8
-C
18
fatty acids, C
8
-C
18
alkyl benzenesulfonates, sulfosuccinic acid mono- and di-C
1
-C
12
-alkyl esters, C
8
-C
18
alkyl polyglycolether carboxylates, C
8
-C
18
N-acy
Körber Heinz-Otto
Merz Thomas
Meyer Bernhard
Roth Christian
Ecolab GmbH & Co. oHG
Gupta Yogendra N.
Merchant & Gould P.C.
Petruncio John M
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