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US 2008/0175875 A1Published application
Cosmetic compositions
OwnerHari Babu Sunkarainventor
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Abstract
This invention relates to cosmetic compositions containing aqueous nanodispersions of polyurethane ionomers based on polytrimethylene ether glycol (“PO3G”), and an active cosmetic ingredient. In a particularly preferred embodiment, the PO3G is derived predominantly from monomers obtained from renewable resources, making the personal care products of this embodiment of the present invention more environmentally friendly in terms of their manufacture, use and disposal.
Claims21
A cosmetic composition comprising:
- (i) an aqueous continuous phase having dispersed therein a nano-sized water-dispersible polyurethane and at least one cosmetic additive, or
- (ii) a solid or semi-solid continuous phase having dispersed therein an aqueous vehicle, a nano-sized water-dispersible polyurethane and at least one cosmetic additive,
- wherein the water-dispersible polyurethane is a polyurethane ionomer comprising a polymeric backbone having ionic and/or ionizable functionality incorporated into, pendant from and/or terminating said polymeric backbone, wherein the polymeric backbone comprises one or more non-ionic segments derived from a reaction product of polytrimethylene ether glycol and a polyisocyanate.
A process for preparing a cosmetic composition comprising the steps of:
- mixing an active cosmetic ingredient into an aqueous dispersion of a nanoparticle-sized polyurethane comprising an aqueous phase and a water-dispersible polyurethane ionomer, wherein the water-dispersible polyurethane ionomer comprises a polymeric backbone having ionic and/or ionizable functionality incorporated into, pendant from and/or terminating said polymeric backbone, wherein the polymeric backbone comprises one or more non-ionic segments derived from a reaction product of polytrimethylene ether glycol and a polyisocyanate, and wherein said polyurethane ionomer has sufficient ionic functionality in order to render the polyurethane dispersible in the aqueous continuous phase,
- wherein, if the cosmetic composition is a solid or semi-solid, the process comprises the further step of:
- adding a solidifying agent to the aqueous dispersion to result in a solid or semi-sold product.
Dependencies are inferred from the claim text.