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US 10,863,739 B2Granted
Stable emulsion formulations of encapsulated volatile compounds
AssigneeAgrofresh Inc.
InventorTirthankar Ghosh
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Abstract
The present invention is based on the discovery of a stable water-in-oil-in-water double emulsion. The double emulsion composition disclosed may contain molecular complex of volatile compounds for example 1-methylcyclopropene (1-MCP). In addition, the double emulsion composition disclosed can provide prolong or controlled release of the volatile compounds.
Claims20
An aqueous-in-oil-in-aqueous double emulsion composition comprising:
- (a) an aqueous-in-oil emulsion composition comprising an aqueous phase and an oil phase;
- (b) a hydrophilic emulsifier, wherein the hydrophilic emulsifier is hydroxyethyl cellulose;
- (c) a surfactant, wherein the surfactant is an aqueous salt solution of a styrene-maleic anhydride copolymer and wherein the surfactant has a hydrophilic/lipophilic balance (HLB) of between 10-15;
- and
- (d) a second aqueous phase,
- wherein the aqueous-in-oil emulsion composition comprises i) a molecular complex of an encapsulated volatile compound, ii) a salt, and iii) water,
- wherein the molecular complex of the encapsulated volatile compound comprises a cyclopropene molecular encapsulating agent complex, and
- wherein the cyclopropene is 1-methylcyclopropene (1-MCP).
5 more elements
A method for preparing an aqueous-in-oil-in-aqueous double emulsion composition, comprising:
- (a) preparing an aqueous-in-oil emulsion composition using an aqueous phase, an oil phase, a lipophilic emulsifier, and an oil soluble thickener;
- (b) combining an active ingredient into the aqueous-in-oil emulsion composition;
- and
- (c) dispersing the aqueous-in-oil emulsion composition into a second aqueous phase,
- (d) adding a hydrophilic emulsifier to the second aqueous phase, wherein the hydrophilic emulsifier is hydroxyethyl cellulose;
- (e) adding a surfactant to the second aqueous phase, wherein the surfactant is an aqueous salt solution of a styrene-maleic anhydride copolymer and wherein the surfactant has a hydrophilic/lipophilic balance (HLB) of between 10-15;
- wherein the aqueous-in-oil emulsion composition comprises i) a molecular complex of an encapsulated volatile compound, ii) a salt, and iii) water, wherein the molecular complex of the encapsulated volatile compound comprises a cyclopropene molecular encapsulating agent complex, and wherein the cyclopropene is 1-methylcyclopropene (1-MCP);
- and
- wherein the aqueous phase of the aqueous-in-oil composition is in direct contact with the oil phase of the aqueous-in-oil emulsion.
6 more elements
Dependencies are inferred from the claim text.