Bleaching and dyeing; fluid treatment and chemical modification – Cleaning or laundering – Removing formation impurities from artifical fiber
Patent
1995-10-19
1998-03-31
Diamond, Alan
Bleaching and dyeing; fluid treatment and chemical modification
Cleaning or laundering
Removing formation impurities from artifical fiber
560171, 562564, 562437, 562621, 134 2, 134 3, 134 41, 134 42, 510109, 510219, 510234, 510238, 510239, 510240, 510241, 510243, 510244, 510245, 510246, 510247, 510252, 510276, 510361, 510362, 510531, 510533, C07C25906, C07C25908, C07C25910, C11D 339
Patent
active
057333424
DESCRIPTION:
BRIEF SUMMARY
DISCUSSION OF THE BACKGROUND
1. Field of the Invention
This application is a 371 of PCT/EP94/01166 filed Apr. 15, 1994.
The present invention relates to hydroxamic acids and hydroxamic acid ethers of the general formula I and II ##STR2## where Z.sup.1 and Z.sup.2 are --NH --OY, --NR.sup.1 --OY or --OX, where in the case of (I) at least one of Z.sup.1 or Z.sup.2, and in the case of (II) Z.sup.1 is --NH --OY or --NR.sup.1 --OY, and -C.sub.18 -alkyl, and functional groups,
The invention furthermore relates to a process for preparing the compounds I and II, to the use thereof as complexing agents for alkaline earth metal and heavy metal ions, in particular as builder and as bleach stabilizers in detergents and cleaners, to detergents and cleaners containing compounds I and II, and to mixtures of compounds I and II with polycarboxylates.
2. Discussion of the Background
Complexing agents for alkaline earth metal ions and heavy metal ions, for example calcium, magnesium, manganese or copper, are required for a wide variety of industrial uses. Examples of relevant purposes and uses are: detergents and cleaners, industrial cleaners, electroplating, water treatment and polymerizations, the photographic industry, the textile industry and the papermaking industry, and various applications in pharmaceuticals, in cosmetics, in foodstuffs and in plant feeding.
Examples of complexing agents familiar to the skilled worker are nitrilotriacetic acid (NTA), ethylenediaminetetraacetic acid (EDTA), ethylenediaminetetramethylenephosphonic acid (EDTMP), propylenediaminetetraacetic acid (PDTA), hydroxypropylenediaminetetraacetic acid (HPDTA), isoserinediacetic acid (ISDA), .beta.-alaninediacetic acid (.beta.-ADA), hydroxyethanediphosphonic acid, diethylenetriaminetetraacetic acid, diethylenetriaminetetramethylenephosphonic acid, hydroxyethyleneaminodiacetic acid, hydroxyethylethylenediaminetriacetic acid, diethylenetriaminepentaacetic acid and, furthermore, diethanolglycine, ethanolglycine, citric acid, glucoheptonic acid or tartaric acid.
The effect of the known compounds, some of which are used, in large scale, is not always optimal in the individual case. For example, the effect of NTA as builder in detergents and cleaners to improve the white washing effect and to prevent deposits which cause encrustations and graying of the fabric is still in need of improvement. NTA also has only a weak effect as bleach stabilizer. Even EDTA, despite its good complexing capacity for heavy metals, shows only a moderate effect as bleach stabilizer in detergents and cleaners, and its effect as builder for improving the white washing effect is likewise in need of improvement.
In some cases, the biodegradability is also unsatisfactory. Thus, EDTA proves to have inadequate biodegradability in conventional tests, as does PDTA or HPDTA and corresponding aminomethylenephosphonates which, moreover, are often undesirable because of their phosphorus content.
EP-A 458 131 (1) recommends as Example 4 on page 11 the compound N,N-bis(carboxymethyl)-2-aminoacetohydroxamic acid as addition to photographic developing baths.
The later publication EP-A 563 571 (2) (named contracting states: DE, FR, GB and NL) discloses the hydroxamic acids of the formula ##STR3## as bleaches for silver halide color photography. These compounds are used as iron complex.
U.S. Pat. No. 4,822,886 (3) describes cyclic N-hydroxyimide structures, which are prepared from citric esters and hydroxylamine in the presence of strong bases, as detergent additives.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide novel complexing agents for alkaline earth metal and heavy metal ions for a wide variety of industrial uses, which, besides good complex-forming properties, in particular improved builder and bleach stabilizer properties in detergents and cleaners, are ecologically acceptable, where possible contain no phosphorus and can be satisfactorily degraded and eliminated biologically. The intention was also to develop a process for preparing these novel complexi
REFERENCES:
patent: 4232112 (1980-11-01), Kuse
patent: 4822886 (1989-04-01), Donovan
patent: 5316898 (1994-05-01), Ueda et al.
Chemical Abstract No. 69:67681r, (month unknown), 1968.
Chemical Abstract No. 98:190619c, (month unknown), 1983.
Baur Richard
Greindl Thomas
Kappes Elisabeth
Kneip Michael
Kud Alexander
BASF - Aktiengesellschaft
Diamond Alan
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