Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Reexamination Certificate
2001-10-02
2003-02-04
Ogden, Necholus (Department: 1751)
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
For cleaning a specific substrate or removing a specific...
C510S424000, C510S426000, C510S428000, C510S492000, C510S517000, C510S528000
Reexamination Certificate
active
06514927
ABSTRACT:
FIELD OF THE INVENTION
The invention relates to detergents and cleaners which comprise a soil- release polymer and alkanesulfonate and/or olefinsulfonate as anionic surfactant.
BACKGROUND OF THE INVENTION
In addition to ingredients which are essential for the washing process, such as surfactants and builder materials, detergents usually comprise further constituents which can be grouped under the term washing auxiliaries and which include such differing active ingredient groups as foam regulators, antiredeposition agents, bleaches, bleach activators and color transfer inhibitors. Such auxiliaries also include substances which impart soil-repellent properties to the laundry fiber and which, if present during the washing process, assist the soil-release of the other detergent constituents. By analogy, the same is true of cleaners for hard surfaces. Such soil-release substances are often referred to as soil-repellents in view of their ability to give the treated surface, for example fabric, a soil-repellent finish. Because of their chemical similarity to polyester fibers, particularly effective soil-release active ingredients which are, however, also able to display the desired effect in the case of fabrics made from other material, are copolyesters, which contain dicarboxylic acid units, alkylene glycol units and polyalkylene glycol units. Soil-release copolyesters of said type and also their use in detergents have been known for a long time.
It is also known to increase the cleaning performance of such soil-release polymers through a combination with a surfactant combination of ether sulfate and alkyloligoethoxylates (WO 96/16150).
SUMMARY OF THE INVENTION
We have now found that the cleaning performance of these soil-release polymers can also be increased by the addition of a sec-alkanesulfonate and/or &agr;-olefinsulfonate.
The invention provides a detergent and cleaner which comprises a combination of a soil-release polymer and an alkanesulfonate and/or &agr;-olefinsulfonate.
DETAILED DESCRIPTION OF THE INVENTION
According to the invention, soil-release polymers having molar masses in the range from 600 to 100,000 g/mol and softening temperatures or melting points in the range from 30° C. to 170° C., preferably in the range from 40° C. to 80° C., are advantageous.
Soil-release polymers are, in particular, oligoesters obtainable from, preferably, terephthalic acid, isophthalic acid, sulfoisophthalic acid and/or the methyl esters thereof, aliphatic dicarboxylic acids (saturated and/or unsaturated), for example adipic acid, and/or anhydrides thereof, aliphatic substituted dicarboxylic acids, for example nonylsuccinic acid, alkylene glycols (ethylene glycol, 1,2-propylene glycol and 1,2-butylene glycol), polyethylene glycols, alkyl polyethylene glycols, polyethylene glycol benzoate, polyethylene glycol sulfobenzoate and in some instances alkanolamines.
Suitable soil-release polymers are already sufficiently known from the prior art.
Thus, for example, German Specification DE-A-16 17 141 describes a washing process using polyethylene terephthalate-polyoxyethylene glycol copolymers. German Specification DE-A-22 00 911 relates to detergents which comprise niosurfactant and a mixed polymer of polyoxyethylene glycol and polyethylene terephthalate. German Specification DE-A-22 53 063 mentions acidic textile finishing agents which comprise a copolymer of a dibasic carboxylic acid and an alkylene polyglycol or cycloalkylene polyglycol and optionally an alkylene glycol or cycloalkylene glycol.
Polymers having molecular weights of from 15,000 to 50,000 of ethylene terephthalate and polyethylene oxide terephthalate, in which the polyethylene glycol units have molecular weights from 1000 to 10,000 and the molar ratio of ethylene terephthalate to polyethylene oxide terephthalate is from 2:1 to 6:1, can, according to German Specification DE-A-33 24 258, be used in detergents.
European Patent EP 066 944 relates to textile treatment agents which comprise a copolyester of ethylene glycol, polyethylene glycol, aromatic dicarboxylic acid and sulfonated aromatic dicarboxylic acid in specific molar ratios. European Patent EP 185 427 discloses methyl or ethyl terminally-capped polyesters containing ethylene terephthalate and/or propylene terephthalate units and polyethylene oxide terephthalate units and detergents comprising a soil-release polymer of this type. European Patent EP 241 984 relates to a polyester which, in addition to oxethylene groups and terephthalic acid units, also comprises substituted ethylene units and glycerol units. European Patent EP 241 985 discloses polyesters which, in addition to oxethylene groups and terephthalic acid units, comprise 1,2-propylene, 1,2-butylene and/or 3-methoxy-1,2-propylene groups and glycerol units and are terminally capped with C
1
-C
4
-alkyl groups. European Patent EP 253 567 relates to soil-release polymers having a molar mass of from 900 to 9000 of ethylene terephthalate and polyethylene oxide terephthalate, in which the polyethylene glycol units have molecular weights from 300 to 3000 and the molar ratio of ethylene terephthalate to polyethylene oxide terephthalate is from 0.6 to 0.95. European Patent Application EP 272 033 discloses polyesters, at least partially terminally-capped by C
1
-C
4
-alkyl or acyl radicals, containing polypropylene terephthalate and polyoxyethylene terephthalate units. European Patent EP 274 907 describes sulfoethyl terminally-capped terephthalate-containing soil-release polyesters. In European Patent Application EP 357 280, soil-release polyesters containing terephthalate, alkylene glycol and poly-C
2
-C
4
-glycol units are prepared by sulfonation of unsaturated end groups.
Polymers of ethylene terephthalate and polyethylene oxide terephthalate, in which the polyethylene glycol units have molecular weights of from 750 to 5000 and the molar ratio of ethylene terephthalate to polyethylene oxide terephthalate is from 50:50 to 90:10, and their use in detergents is described in German Patent DE 28 57 292.
Soil-release polyesters of this type are available commercially under the names Sokalan® HP 40, Sokalan 9976 (BASF) or Velvetol® (Rhône-Poulenc), Repel-O-Tex® (Rhône-Poulenc), Zelcon® (Dupont), Permalose® (ICI) or Milease® (ICI).
Preferred soil-release polyesters include those compounds which are obtainable formally by esterification of two monomer fractions, the first monomer being a dicarboxylic acid HOOC-Ph-COOH and the second monomer being a diol HO—(CHR
3
—)
a
OH, which can also be in the form of a polymeric diol H—(O—(CHR
3
—)
a
)
b
OH. Ph is an o-, m- or p-phenylene radical which can carry from 1 to 4 alkyl radicals having from 1 to 22 carbon atoms, sulfonic acid groups, carboxyl groups and mixtures thereof, R
3
is hydrogen, an alkyl radical having from 1 to 22 carbon atoms and mixtures thereof, a is a number from 2 to 6 and b is a number from 1 to 300. The polyesters which can be prepared therefrom preferably contain both monomer diol units —O—(CHR
3
—)
a
O— and polymer diol units —(O—(CHR
3
)
a
)
b
O—. The molar ratio of monomer diol units to polymer diol units is preferably from 100:1 to 1:100, in particular from 10:1 to 1:10. The degree of polymerization b in the polymer diol units is preferably in the range from 1 to 500, in particular from 12 to 140. The molecular weight or the mean molecular weight or the maximum for the molecular weight distribution of preferred soil-release polyesters is preferably in the range from 250 to 100,000, in particular from 500 to 50,000. The parent acid of the radical Ph is preferably chosen from terephthalic acid, isophthalic acid, phthalic acid, trimellitic acid, mellitic acid, the isomers of sulfophthalic acid, sulfoisophthalic acid and sulfoterephthalic acid and mixtures thereof. If their acid groups are not part of the ester bonds in the polymer, they are preferably present in salt form, in particular as alkali metal salt or ammonium salt. Of these, sodium and potassium salts are particularly preferred. If desired, instead of the monomer HOOC-Ph-COOH, small amounts, in part
Lang Frank-Peter
Reinhardt Gerd
Clariant GmbH
Ogden Necholus
Silverman Richard P.
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