Benefit agent delivery compositions
AssigneeThe Procter & Gamble Company
InventorsAdam Simon HAYWARD, Johan SMETS, Neil Joseph LANT, Mariana B. CARDOSO, Gregory Scot MIRACLE
Life of this patent
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Abstract
Benefit agent delivery system suitable for use in cleaning compositions, particularly laundry, comprising benefit agents such as dyes, pigments etc, for release during a cleaning and/or treatment step, such as a domestic washing and/or rinsing step. Cleaning compositions containing the benefit agent delivery systems and methods of making the delivery systems and the cleaning compositions.
Claims20
A benefit agent delivery system comprising a benefit agent selected from the group consisting of fabric shading dye, pigment and/or optical brightener and mixtures thereof, and an encapsulating layer, said encapsulating layer comprising colloid particles and a sealing layer.
A composition according to 9 comprising a second benefit agent delivery system wherein the benefit agent comprised in said second benefit agent delivery system comprises a cleaning or treatment adjunct which is not a dye.
A method of making a benefit agent delivery system comprising the steps of:
- (i) forming a water-in-oil emulsion comprising colloid particles and benefit agent, wherein said benefit agent is present in the aqueous phase;
- (ii) allowing a residence time to enable said colloid particles to assemble at the oil-water interface of an aqueous droplet comprising said benefit agent;
- and
- (iii) in a sealing step, sealing the colloidosome with a sealing layer to provide a sealed colloidosome composition.
A method of making a benefit agent delivery system comprising the steps of:
- (i) providing:
- a colloid composition comprising an aqueous or water-miscible composition comprising colloid particles;
- a first salt composition comprising an aqueous solution comprising a first water soluble salt;
- and a benefit agent composition comprising an aqueous or water-miscible composition comprising a benefit agent comprising a fabric substantive dye, pigment and/or brightener;
- and a water immiscible liquid, preferably an oil;
- i. mixing the colloid composition, first salt composition and the benefit agent composition with the water immiscible liquid to form a water-in-oil emulsion and allowing sufficient time to elapse for the colloid particles to assemble at the oil-water interface to form a colloid particle-containing emulsion;
- ii. a sealing step comprising, mixing the colloid particle-containing emulsion with a second aqueous solution comprising a second water-soluble salt wherein first and second water soluble salts react to form a sealing layer of substantially water insoluble salt around the colloidosome, forming a sealed colloidosome composition.
A method according to 16 wherein the first salt composition and the benefit agent composition are mixed prior to addition to the water immiscible composition, and the residence time between the first salt composition and the benefit agent composition prior to addition to the water immiscible composition is less than 1 hour.
Method of masking the colour of a highly coloured benefit agent in a cleaning and/or treatment compositions including the step of encapsulating at least a portion of said highly coloured benefit agent in a colloidosome.
Dependencies are inferred from the claim text.