Organic compounds -- part of the class 532-570 series – Organic compounds – Percarboxylic acids or salts thereof
Patent
1993-02-02
1995-10-31
Geist, Gary L.
Organic compounds -- part of the class 532-570 series
Organic compounds
Percarboxylic acids or salts thereof
562 3, 562 55, 25218626, 25218642, 252 95, C07C40908, C07C40942, C01B 1506
Patent
active
054631122
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to peroxycompounds and particularly to sulphoperoxyacids, to methods for their preparation, to their selection and use as bleaching agents, to their selection and use as disinfectants and to bleaching, washing or disinfectant compositions containing them.
Peroxycompounds have been incorporated as bleaching agents for many years in bleaching or washing compositions or for their disinfectant properties in disinfecting compositions. In more recent years, there has been a growing interest in the use of peroxyacids for such purposes, in view of their high electropotential which enables them, as a class, to be more effective at lower washing temperatures and at lower molar concentrations than peroxyhydrates and in view of their biocidal effectiveness against a wide spectrum of pathogenic micro-organisms.
The incorporation of the same or a very similar class of peroxyacids containing a range of other substituents in washing or laundering compositions, has been described in a number of patent specifications to leading producers of such compositions, including U.S. Pat. No. 4,005,029 to Procter and Gamble U.S. Pat. No. 4,325,828 to Lever Bros. In such specifications, a formula Y--R--CO.sub.3 H is disclosed in which Y can represent a number of different substituents including a carboxylic, peroxycarboxylic or sulphonic acid/salt group. Although this is not always apparent from the disclosures in those specifications, there are differences in effectiveness at bleaching or disinfecting between the various members of such a general class of peroxyacids, depending upon the nature of Y and other substituents and their spatial relationship to the peroxyacid group and to each other. This is confirmed in U.S. Pat. Nos. 4,704,404 and 4,536,313, both to Interox Chemicals Limited, which demonstrated differences performance and/or safety between sulphoperbenzoic acid compounds having the same empirical formula, but differing as to the ortho, meta or pare relationship of the sulpho group and the percarboxylic acid group around the benzene nucleus.
Sulphoperacids are inherently interesting as washing composition components in view of the absence of eutrophying elements from their structure. The aforementioned meta and pare sulphoperbenzoic acid compounds were rather effective against hydrophilic stains, such as red wine, but such stains comprise only a fraction of stains encountered in laundry and it would be desirable to devise other sulphoperacids having an improved effectiveness overall against stains, including less hydrophilic stains.
According to a first aspect of the present invention there are provided as novel compounds sulphoperoxyacids having the following formula (I): ##STR2## in which R' bonds the percarboxylic acid substituent directly to the benzene nucleus or represents an alkylene group, R" represents at least one alkyl group and the total number of carbon atoms in R'+R" is from 4 to 18, R' and R" optionally forming a cycloalkyl group, and in which the --CO.sub.3 H and --SO.sub.3 M substituents are separated by at least 3 carbons linearly, and M represents an alkali metal.
According to a second aspect of the present invention there is provided as bleaching agents a selection sulphoperoxyacids having the formula (I): ##STR3## in which R' bonds the percarboxylic acid substituent directly to the benzene nucleus or represents an alkylene group, R" represents at least one alkyl group and the total number of carbon atoms in R'+R" is from 4 to 18, R' and R" optionally forming a cycloalkyl group, and in which the --CO.sub.3 H and --SO.sub.3 M substituents are separated by at least 3 carbons linearly and M represents an alkali metal.
According to a third aspect of the present invention there are provided bleaching compositions containing an effective amount of the sulphoperoxyacid of formula (I) described hereinabove in the second aspect of the present invention, and at least one diluent, or detergent builder or surfactant or detergent additive.
According to a fourth aspect of the present inv
REFERENCES:
patent: 3414593 (1968-12-01), Robson
patent: 4536313 (1985-08-01), Hignett et al.
patent: 4704404 (1987-11-01), Sanderson
patent: 4824591 (1989-04-01), Dyroff et al.
Horne Graham R.
Sanderson William
Sankey John P.
Anthony Joseph D.
Geist Gary L.
Solvay Interox Limited
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