Solid- suspending systems
OwnerJohn Hawkins, Edward Tunstall Messenger +3inventors
InventorsJohn Hawkins, Edward Tunstall Messenger, Zenaida Rivera-Healy, Richard Malcolm Clapperton, Mark Rollinson
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Abstract
Structured surfactant systems with solid suspending properties comprise a substantially non-aqueous liquid continuous phase and a structuring surfactant capable of forming an Lα phase in said continuous liquid phase at a concentration between 10 and 20% by weight solid surfactant preferably comprising at least two hydrophobic C7-30 aliphatic groups per molecule, said groups preferably comprising bent chain groups such as cis monounsaturated alkenyl e.g. erucyl or singly branched alkyl e.g. isopalmityl.
Claims30
A structured surfactant composition having solid suspending properties and comprising a substantially non-aqueous continuous liquid phase and a structuring surfactant which is present in excess of its solubility in the continuous phase and is present as an Lα phase.
A composition according to any foregoing claim wherein said structuring surfactant is present as batonettes, spherulites and/or expanded lamellar phase.
A composition according to any foregoing claim wherein said structuring-surfactant is an anionic or cationic surfactant having at least two hydrophobic aliphatic groups per molecule with from 7 to 30 carbon atoms each.
A composition according to any foregoing claim wherein said continuous phase comprises at least 50% by weight thereof of a non-ionic surfactant.
A composition according to any foregoing claim wherein said continuous phase comprises a non surfactant hydroxylic solvent.
A composition according to any foregoing claim wherein said continuous phase comprises a water immiscible organic liquid.
A composition according to any foregoing claim wherein said structuring-surfactant comprises a spherulite-forming surfactant wherein said C7 to 30 aliphatic group comprises a bent alkyl or alkenyl chain.
A substantially non-aqueous suspension comprising a structured surfactant composition according to any foregoing claim;
- and a non-colloidal particulate phase which is substantially immiscible with the continuous liquid phase and which is held in suspension therein by the structured surfactant.
A composition according to any foregoing claim wherein said suspended phase comprises a solid builder and/or an abrasive.
A composition according to any foregoing claim in the form of a unit dose packed in a water soluble sachet or capsule.
Dependencies are inferred from the claim text.