Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Patent
1996-07-05
1998-09-08
Lieberman, Paul
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
For cleaning a specific substrate or removing a specific...
510466, 510228, 510350, 510357, 510352, 510501, 510474, 252321, 252358, C11D 112, C11D 308, C11D 320
Patent
active
058045449
DESCRIPTION:
BRIEF SUMMARY
This invention relates to granular detergent compositions suitable for use in cleaning processes, particularly fabric cleaning, and more especially to granular detergent compositions comprising high-foaming surfactant and no alkyl benzene sulfonate surfactant, wherein suds control is provided by a suds suppression system comprising in combination particulate and spray-on components.
Granular detergent compositions containing alkyl benzene sulfonate salts are well known in the art and are in widespread commercial use. Conventionally the alkyl benzene sulfonate salt forms part of a surfactant mixture in association with one or more other anionic or nonionic surfactants.
Interest has recently increased in the use of alternatives to alkyl benzene sulfonates as major components of detergent products.
Examples of primary surfactants that are readily biodegradable and which could replace the alkyl benzene sulfonate component either partially or in toto include alkyl sulfate, alkyl ethoxysulfate and polyhydroxy fatty acid amide surfactants. The high-sudsing nature of these surfactants is well known. Indeed, both alkyl ethoxysulfate and polyhydroxy fatty acid amide surfactants are known in the art, as surfactants for use in high-sudsing manual dishwashing compositions as represented for example by the composition disclosed in PCT Patent Application No. WO 92/06163. The high-sudsing characteristic presents a problem when these surfactants are to be included as major components of the surfactant system of detergent compositions for use in machine washing processes, such as machine laundering processes and machine dishwashing processes, where control of suds is required. The problem is particularly severe where the washing processes are carried out in high temperature and/or soft water conditions.
Suds suppression systems, particularly those utilising silicone antifoam compounds are well-known in the detergent art. The active suds suppressing components of such systems may be incorporated into granular detergent compositions, in a number of ways. For example the suds suppressing component may be dissolved or dispersed in an inert carrier liquid and then be sprayed on to the granular components of the detergent composition. Alternatively, the suds suppressing component may be present as a distinct particulate component of the granular composition. It is conventional for the suds suppressing component to be added as either a spray-on or as a distinct particulate.
The Applicants have found that where a granular detergent composition contains a high proportion of high-sudsing surfactant in the surfactant system a specific suds suppression system combining both spray-on and particulate components provides highly effective suds control, particularly in stressed high temperature/soft water wash conditions. Where only a spray-on component is employed, caking of the granular product can be a problem, particularly in view of the high levels of active suds suppressing components which need to be incorporated to combat the high-sudsing nature of the surfactants. Where all the suds suppression system contains only particulate components flash sudsing, that is high levels of sudsing which occur rapidly on dissolution of the detergent at the commencement of the wash process, can occur, especially when the particulate component releases the active suds suppressing component slowly into the wash solution.
According to one aspect of the present invention there is provided a granular detergent composition containing
(a) from 1% to 30% by weight of the composition of a surfactant system containing from 30% to 100% by weight of the surfactant system of high-sudsing surfactant selected from alkyl sulfate, alkyl ethoxysulfate, polyhydroxy fatty acid amide surfactant and mixtures thereof;
(b) from 0.05% to 20% of the composition of a suds suppressing system comprising in combination wherein said spray-on component is incorporated into said granular detergent composition by being sprayed on to one or more of the granular components of the com
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Powell Suzanne
Thoen Christiaan Arthur
Bolam Brian M.
Echler, Sr. Richard S.
Fries Kery A.
Lieberman Paul
Procter & Gamble Company
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