Cleaning compositions for solid surfaces – auxiliary compositions – Auxiliary compositions for cleaning – or processes of preparing – Surfactant composition for cleaning agents
Patent
1998-03-06
2000-12-12
Fries, Kery
Cleaning compositions for solid surfaces, auxiliary compositions
Auxiliary compositions for cleaning, or processes of preparing
Surfactant composition for cleaning agents
510404, 510444, 510466, 510498, 510511, 510536, C11D 308, C11D 760
Patent
active
061599271
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to structured surfactant compositions comprising a detergent surfactant and hydrophilic silica particulates to be used in granular detegent compositions. The preferred silica particulate is hydrophilic precipitated silica. The process for making a structured surfactant composition comprising a detergent surfactant and hydrophilic silica particulates is also included.
BACKGROUND OF THE INVENTION
It is desired to increase the active level of detergent surfactants in compositions comprising said surfactants in order to facilitate the manufacture of detergent compositions containing high active levels. In addition, it is also desirable to have surfactant compositions that are pumpable and generally easy to transport and transfer from one manufacturing location to a granulation site. One way to meet these needs is by mixing a chemical structuring agent to the detergent surfactant. Prior art includes EPO 508 543 published Oct. 14, 1992 and U.S. Pat. No. 4,925,585 granted May 15, 1990.
It has now been found that incorporating hydrophilic, finely-divided silica particulates as a highly-preferred structuring agent with detergent surfactant enables the formation of structured surfactant compositions which have high levels of active. Preferably, the detergent surfactant is in an aqueous paste form. Structuring of the paste means the addition of a chemical in a solid, liquid, or solution form to change the structure of the paste or modify its physical characteristics to facilitate the manufacture of high active detergent agglomerates which otherwise are not easily obtainable under normal operating conditions. In addition, when such structured surfactant compositions are mixed with other detergent adjuvants such as additional surfactants, detergent builders, inorganic salts, silica, and mixtures thereof to form granular detergent compositions, such granules are free flowing and easy to transport and transfer.
SUMMARY OF THE INVENTION
The invention encompasses a structured surfactant composition consisting essentially of: particulate; and
The invention further encompasses a granular detergent composition comprising: surfactant composition consisting essentially of: particulate; and group consisting of other detergent surfactants, detergent builders, silica, and mixtures thereof.
A process for making structured surfactant compositions is also included.
All documents referenced herein are incorporated by reference.
DETAILED DESCRIPTION OF THE INVENTION
This invention relates to compositions with a detergent surfactant and hydrophilic, finely-divided silica particulate.
Ingredients, as well as optional ingredients, as well as the process for making a granular detergent composition or an additive composition for a detergent composition are described in detail hereinafter.
The structured surfactant composition of the present invention comprises by weight: most preferably from about 40% to about 45% of a detergent surfactant; preferably from about 2% to about 5%, of hydrophilic, finely-divided silica particulate; and particulate to moisture is from about 1:5 to about 1:25, more preferably from about 1:5 to about 1:7.5.
The structured surfactant composition can be mixed with other detergent ingredients to form detergent compositions. If the structured surfactant is directly made into a detergent composition, the detergent composition would comprise from about 20% to about 65%, preferably from about 30% to about 65%, most preferably from about 45% to about 65% structured surfactant composition. The granular detergent composition preferably has a particle size of a maximum of 5% on 14 Tyler mesh.
The particulate silica is added to the surfactant paste, which typically contains 15% to about 25% moisture, as well as salts which are the by-product of neutralization. The particulate silica absorbs the water and a hardened continuous paste is formed. When shear force is applied to the hardened paste, the paste becomes a flowable liquid, which is easily dispersed into fine
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Bolam Brian M.
Fries Kery
Miller Steven W.
The Procter & Gamble & Company
Zerby Kim William
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