EP0092932A1
Expired / Lapsed
EP
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Hydrogen peroxide compositions
Assignee: Solvay Interox Ltd
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Filing: 1983-04-13
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Granted: —
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Expires: 2003-04-13
Abstract
Abstract The effectiveness of hydrogen peroxide 'or bleaching and disinfecting at ambient to hand hot temperatures can be enhanced by reaction with a peracid generator (activator), but the provision of storage stable concentrated aqueous liquid premixes of hydrogen peroxide and activator presents many problems arising from the physical and chemical properties of the components. The present invention provides aqueous acidic emulsions of hydrogen peroxide and enol esters, preferably at a pH of 2 to 5 and containing a slight excess of hydrogen peroxide over an equivalent mole ratio to enol ester activator of 1:1. The concentrations of the components of some preferred emulsions are selected in the ranges of 3 to 20% hydrogen peroxide, 30 to 85% water, 10 to 30% enol ester (%s by weight based upon the emulsion) and from 10 to 70% by weight based on the enol ester of emulsifiers. In preferred compositions, the activator is selected from vinyl or isopropenyl or but-1-enyl or cyclohex-1-enyl acetate or benzoate and divinyl adipate or phthalate, and 1,5- diacetoxypenta-1,4-diene. The compositions can be used as such or upon dilution with aqueous media and in conjunction with detergent compositions, and for cleaning and disinfecting absorbent or non-absorbent materials.
Inventors
- 👤 William Ronald Sanderson
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 08:03
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/39; C11D3/3947; C11D3/3902; C11D3/3905; C11D3/3907; C11D3/391
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
213 words
A composition suitable for use in bleaching or disinfection containing hydrogen peroxide and an activator characterised in that it comprises an aqueous acidic solution of hydrogen peroxide having dispersea therein an organic phase with an emulsifying amount of an emulsifier therefor, said organic phase comprising an enol ester having either of the following general formulae:- or in which each of R a and R b represent hydrogen or a C 1 to C 5 alkyl radical or a C 2 to C 4 alkenyl radical or a phenyl radical, R a and R b being the same or different or combining together to form a carbocyclic di-radical, R C represents hydrogen or a C 1 to C 5 alkyl radical or a phenyl radical or is combined with R a or R b and the olefin group to form a carbocyclic radical, R e represents hydrogen or a C 1 to C 3 alkyl radical or a phenyl radical, n is 1 or 2, when n = 1, R d represents hydrogen or a C 1 to C 3 alkyl radical or a phenyl radical, when n = 2, R d represents a C 2 to C 10 alkylene di-radical or a phenylene di-radical, and m is an integer from 0 to 8.
Claim 2
Dependent Claim
213 words
A composition suitable for use in bleaching or disinfection containing hydrogen peroxide and an activator characterised in that it comprises an aqueous acidic solution of hydrogen peroxide having dispersea therein an organic phase with an emulsifying amount of an emulsifier therefor, said organic phase comprising an enol ester having either of the following general formulae:- or in which each of R a and R b represent hydrogen or a C 1 to C 5 alkyl radical or a C 2 to C 4 alkenyl radical or a phenyl radical, R a and R b being the same or different or combining together to form a carbocyclic di-radical, R C represents hydrogen or a C 1 to C 5 alkyl radical or a phenyl radical or is combined with R a or R b and the olefin group to form a carbocyclic radical, R e represents hydrogen or a C 1 to C 3 alkyl radical or a phenyl radical, n is 1 or 2, when n = 1, R d represents hydrogen or a C 1 to C 3 alkyl radical or a phenyl radical, when n = 2, R d represents a C 2 to C 10 alkylene di-radical or a phenylene di-radical, and m is an integer from 0 to 8.
Claim 3
Dependent Claim
26 words
A composition according to claim 1 characterised in that the enol ester and hydrogen peroxide are present in an equivalent ratio of from 1:1 to 2:3.
Claim 4
Dependent Claim
25 words
A composition according to claim 1 or 2 characterised in that the concentration of hydrogen peroxide therein is from 3 to 20% by weight thereof.
Claim 5
Dependent Claim
23 words
A composition according to claim 3 characterised in that the concentration of hydrogen peroxide therein is from 4 to 8% by weight thereof.
Claim 6
Dependent Claim
25 words
A composition according to any preceding claim characterised in that the proportion of enol ester activator therein is from 10 to 30% by weight thereof.
Claim 7
Dependent Claim
27 words
A composition according to any preceding claim characterised in that the amount of emulsifier employed is from 10 to 70% by weight of the enol ester activator.
Claim 8
Dependent Claim
43 words
A composition accord-ng to any preceding claim characterised in that it contains from 10 to 50% by weight of nonionic emulsifier and from 5 to 50% by weight of anionic emulsifier, both %s being based on the weight of the enol ester activator.
Claim 9
Dependent Claim
48 words
A composition according to any preceding claim characterised in that it comprises 3 to 20% hydrogen peroxide, 30 to 85% water, 10 to 30% enol ester, %s by weight being based upon the emulsion and from 10 to 70% by weight based on the enol ester of emulsifiers.
Claim 10
Dependent Claim
21 words
A composition according to any preceding claim characterised in that the aqueous phase has a pH of from 2 to 5.
Claim 11
Dependent Claim
44 words
A composition according to any preceding claim characterised in that the enol ester activator of formula (i) or (ii) satisfies the condition that R a is a hydrogen, methyl or ethyl radical and R b and R C are each hydrogen or methyl radicals.
Claim 12
Dependent Claim
50 words
ll. A composition according to any preceding claim characterised in that the enol ester activator of formula (i) or (ii) respectively satisfies the condition that R d is an ethyl, methyl, phenyl, phenylene or C 2 -C 4 polymethylene radical or R e is a methyl, ethyl or phenyl radical.
Claim 13
Dependent Claim
27 words
A composition according to any preceding claim characterised in that the enol ester activator of formula (ii) satisfies the condition that m is 0, 1 or 2.
Claim 14
Dependent Claim
48 words
A composition according to any of claims 1 to 9 characterised in that the activator is vinyl or isopropenyl or butenyl acetate, divinyl glutarate or adipate or azelate or sebacate, vinyl or isopropenyl benzoate, divinyl phthalate or iso- or tere- phthalate, cyclohexenyl acetate, glutardienol diacetate or succindienol diacetate.
Claim 15
Dependent Claim
52 words
A composition according to any preceding claim characterised in that the emulsifier(s) is or are selected from glycerol fatty acid esters, derivatives of lanolin, sorbitan fatty acid esters, POE alkyl phenols, POE amines, POE fatty acid esters, POE fatty alcohols, POE/POP block condensates, or alkyl esters of sulphosuccinates, or linear alkylbenzene sulphonates.
Claim 16
Dependent Claim
14 words
A composition according to any preceding claim and in the form of a microemulsion.
Claim 17
Dependent Claim
168 words
A process for the preparation of a liquid bleach or disinfectant composition which comprises the steps of: (a) blending together in a chamber or zone one or more enol esters as defined in Claim 1, with one or more emulsifiers therefor at a temperature so selected that the resultant blend is in the liquid state, (b) preparing in a second chamber or zone an aqueous solution of hydrogen peroxide, (c) when necessary cooling either or both of the blend and the aqueous solution, (d) bringing the blend and the aqueous solution into contact in an equivalent mole ratio of enol ester to hydrogen peroxide within the range 5:1 to 1:10, in the presence of at least 5% by weight based on the enol ester emulsifier provided in the blend or otherwise in a mixing chamber or zone at a temperature selected in the range of up to not substantially higher than 50°C, and (e) subjecting the mixture simultaneously or subsequently to a shearing force thereby forming an emulsion.
Claim 18
Dependent Claim
20 words
A process according to claim 16 characterised by the characterising feature defined in any one of claims 2 to 15.
Claim 19
Dependent Claim
37 words
A process according to claim 16 or 17 characterised in that step (a) is effected at a temperature of from ambient temperature to 40 o C employing an enol ester and emulsifier each melting at below 40°C.
Claim 20
Dependent Claim
56 words
A process for bleaching or washing or a process for disinfection employing a composition according to any of claims 1 to 15 characterised in that the article or surface to be bleached or disinfected is brought into contact with the said composition as such or after dilution and optionally in the presence of a detergent composition.
Claim 21
Dependent Claim
18 words
A process according to claim 19 in which the bleaching, washing or disinfection is effected under alkaline conditions.
Claim 22
Dependent Claim
49 words
A composition or method of preparing a composition or method of using a composition containing a peroxygen compound and an ester activator substantially as described herein with respect to any novel feature, novel combination of known features or combination of a novel feature with any other feature described herein.
Claim 23
Dependent Claim
49 words
A composition or method of preparing a composition or method of using a composition containing a peroxygen compound and an ester activator substantially as described herein with respect to any novel feature, novel combination of known features or combination of a novel feature with any other feature described herein.
References Cited (Backward Citations)
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