Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – With oxygen or halogen containing chemical bleach or oxidant...
Patent
1997-06-23
2000-06-27
Lovering, Richard D.
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
With oxygen or halogen containing chemical bleach or oxidant...
510191, 510218, 510536, 134 3, 25218623, 25218626, 25218642, 422 28, C11D 718, C11D 3395
Patent
active
060807121
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to thickened compositions and particularly to thickened peracid compositions.
BACKGROUND OF THE INVENTION
During recent years, increasing attention has been paid by industry and the general public in Western Europe and North America to the environmental effects of the many substances that are employed in modern life. One of the classes of substances which have hitherto been widely employed comprises chlorine and oxychlorine derivatives thereof. Such compounds have been reported to generate under appropriate circumstances carcinogenic compounds and as a result, industry is seeking alternatives or replacements for such compounds in order to allay any residual public anxiety.
An alternative class of compounds comprises peroxygen compounds, of which one sub-class of especial interest comprises peracids which contain the moiety --CO--OOH. Peracids, like hydrogen peroxide, enjoy the substantial advantage of generating oxygen, either as such or in an active form during its deployment rather than chlorine or active chlorine species upon which environmentalists currently cast doubts. Furthermore, for a range of purposes such as disinfection, oxidation and bleaching, many of which are encountered domestically, peracids are more effective in general than hydrogen peroxide.
A number of the peracids are either liquid themselves or are produced conveniently in aqueous solution. Although such compositions are particularly appropriate for the treatment of or incorporation in liquid media, they are less appropriate for the treatment of solid surfaces, and particularly non-horizontal surfaces on account of the ability of liquid compositions to flow away from the point of contact. In consequence, and in order to extend the range of applications for peracids, it would be desirable to devise peracid-containing compositions that flowed less freely.
In principle, liquid compositions can be rendered less free-flowing by the incorporation of materials which thicken the liquid or introduce structure into the liquid. However, substances which have hitherto been effective thickeners for other liquids cannot be presumed automatically to be suitable for thickening liquid peracids or peracid solutions. This difficulty derives from the very same properties of the peracids that make them effective oxidising agents and bleaches. Interaction with thickeners during storage can result in the mutual decomposition of the peracid and the thickener, which in turn not only negates the beneficial effects of thickening, but also progressively removes the capability of the peracid to perform its desired task. It will be recognised that the problem is especially apparent in the case of peracids which are themselves either liquid or are present in solution. There is also a second important difficulty in attempting to thicken peracid solutions. The presence of the peracid and the corresponding carboxylic acid from which it can be derived, tends to significantly inhibit thickening. It is believed that the difficulty arises from interference of the peracid and/or carboxylic acid with aqueous structuring mechanisms which enable surfactants and like materials to thicken aqueous solutions. However, it will be understood that the instant invention does not depend upon the accuracy of the foregoing belief or explanation, but instead it relies upon the results actually demonstrated.
By comparison with soluble peracids, the problem can be somewhat less in the case of substantially insoluble solid peracids that are suspended in particulate form in aqueous media, because the peracid and the liquid constitute different physical phases that consequently minimise the extent of chemical interaction between them, and the thickening of the aqueous phase can occur with a lessened risk of interference from dissolved peracid species. European patent application No. 0 160 342 discloses that insoluble peracids can be suspended by the use of a combination of a C.sub.12 -C.sub.15, primary alcohol ethoxylate having 7 ethy
REFERENCES:
patent: 3832234 (1974-08-01), Otrhalek et al.
patent: 4642198 (1987-02-01), Humphreys et al.
patent: 4781854 (1988-11-01), Overtonn et al.
patent: 4828747 (1989-05-01), Rerek et al.
patent: 4929377 (1990-05-01), Emmons et al.
patent: 5391324 (1995-02-01), Reinhardt et al.
patent: 5409632 (1995-04-01), Showell et al.
patent: 5419847 (1995-05-01), Showell et al.
patent: 5425898 (1995-06-01), Phillipi et al.
patent: 5451346 (1995-09-01), Amou et al.
patent: 5489706 (1996-02-01), Revell
patent: 5616281 (1997-04-01), Hardy et al.
1993 McCutcheon's vol. 1: Emulsifiers & Detergents North American Edition, (Glen Rock, NJ, copyright 1993) pp. v and 3, Jan. 1994.
Gray Andrew Kevin
Revell Christopher
Lovering Richard D.
Metzmaier Daniel S
Solvay Interox Limited
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