Sunscreen reagents from unsaturated waxes and triglycerides
AssigneeThe United States of America as represented by the Secretary of Agriculture
InventorRogers E. Harry-O'kuru
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Abstract
A class of UVA- and UVB-absorbing esters has been derived from milkweed oil by modification with a variety of cinnamic acids. These agents have the advantage of being synthesized from natural materials, while providing a value-added use for the oil. They are readily formulated into standard UV-absorbing daily-wear cosmetic, hair and skin care, and sunscreen formulations.
Claims11
A modified triglyceride milkweed oil comprising C16-C18 acylmoieties substituted with one or more cinnamate moieties selected from the group consisting of cinnamoyl, feruloyl, coumoroyl, sinapoyl, and o-methylsinapoyl.
A method of making a modified triglyceride milkweed oil comprising C16-C18 acyl moieties substituted with one or more cinnamate moieties selected from the group consisting of cinnamoyl, feruloyl, coumoroyl, sinapoyl, and o-methylsinapoyl comprising the steps:
- a) epoxidizing said triglyceride milkweed oil at one or more sites of unsaturation on C16-C18 acyl moieties in said oil to produce an epoxidized triglyceride milkweed oil having one or more sites of epoxidation;
- b) modifying said one or more sites of epoxidation by esterification with an acid selected from the group consisting of cinnamic acid, ferulic acid, coumaric acid, sinapic acid, and 0-methylsinapic.
Dependencies are inferred from the claim text.