COMPOSITIONS COMPRISING HYDROGEL PARTICLES
Provided are stable compositions comprising an aqueous carrier, hydrogel particles comprising one or more polysaccharides, and one or more surfactants. Also provided are methods of making such compositions.
1 . A composition comprising an aqueous carrier, hydrogel particles comprising one or more polysaccharides, and one or more surfactants, wherein said composition does not show phase separation over a period of ten days at room temperature as measured using the Phase Stability Test.
2 . The composition of claim 1 wherein the polysaccharides are selected from the group consisting of carrageenan, low acyl gellen gum, low methyoxyl pectin or mixtures thereof.
3 . The composition of claim 1 wherein the one or more polysaccharides comprise k-carrageenan.
4 . The composition of claim 1 wherein the one or more polysaccharides comprise i-carrageenan.
5 . The composition of claim 1 , wherein the hydrogel particles comprise polysaccharide, cross-linking agent and water.
6 . The composition of claim 5 , wherein the cross-linking agent comprises a metal salt or metal acid.
7 . The composition of claim 6 , wherein the cross-linking agent comprises potassium chloride, calcium chloride, or a mixture thereof.
8 . The composition of claim 7 , wherein the cross-linking agent is potassium chloride.
9 . The composition of claim 5 wherein the composition comprises from greater than zero to 1% of the one or more polysaccharides.
10 . The composition of claim 5 wherein the composition comprises from 0.5 to 2.5% of the cross-linking agent.
11 . The composition of claim 1 wherein the hydrogel particles have an average particle size of from 1 micrometer (μm) to 500 μm.
12 . The composition of claim 1 wherein the one or more surfactants are selected from the group consisting of anionic, nonionic, amphoteric surfactants or combinations of two or more thereof.
13 . The composition of claim 12 wherein the one or more surfactants comprise one or more anionic surfactants.
14 . The composition of claim 13 wherein the one or more anionic surfactants comprise sodium laureth sulfate, sodium lauryl sulfate, ammonium lauryl sulfate, ammonium laureth sulfate, or a mixture of two or more thereof.
15 . The composition of claim 14 wherein the one or more anionic surfactants comprise sodium laureth sulfate.
16 . The composition of claim 12 wherein the one or more surfactants comprise one or more amphoteric surfactants.
17 . The composition of claim 16 wherein the one or more amphoteric surfactants are selected from the group consisting of cocamidopropylbetaine, lauramidopropyl betaine, decyl betaine, lauryl betaine and combinations of two or more thereof.
18 . The composition of claim 17 wherein the one or more amphoteric surfactants comprise cocamidopropylbetaine.
19 . The composition of claim 1 further comprising one or more non-hydrogel particles dispersed therein.
20 . The composition of claim 1 wherein the composition does not show phase separation over a period of one month at 50° C. as measured using the Accelerated Phase Stability Test.
21 . A composition comprising an aqueous carrier, 3 wt. % on an active basis or more of anionic surfactant, hydrogel particles comprising one or more polysaccharides selected from the group consisting of carrageenans, low acyl gellen gum, low methyoxyl pectin or a mixture of two or more thereof, and from 0.5 to less than 3% of cross-linking agent, wherein said composition comprises from greater than zero to less than 0.8 wt. % on an active basis of polysaccharide selected from the group consisting of carrageenan, low acyl gellen gum, low methyoxyl pectin, and a mixture of two or more thereof.
22 . A method of making a composition comprising hydrogel particles, the method comprising the steps of making a hydrogel comprising one or more polysaccharides, and mixing the hydrogel with an aqueous mixture comprising one or more surfactants to form a composition having an aqueous carrier, hydrogel particles comprising one or more polysaccharides dispersed therein, and one or more surfactants, wherein the resulting composition does not show phase separation over a period of ten days at room temperature as measured using the Phase Stability Test.
23 . The method of claim 21 wherein the mixing step further includes mixing non-hydrogel particles into the aqueous mixture.