Nanoemulsion containing nonionic polymers, and its uses

Details Nanoemulsion containing nonionic polymers, and its uses Nanoemulsion containing nonionic polymers, and its uses

2006-02-14

2006-02-14

Yoon, Tae H. (Department: 1714)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

C523S105000, C524S035000, C524S306000, C524S312000, C524S321000, C524S800000, C524S803000, C524S804000, C424S078030, C424S078040, C424S400000, C424S485000, C424S486000

Reexamination Certificate

active

06998426

ABSTRACT:
These objects and others may be accomplished with the present invention, the first embodiment of which provides an oil-in-water nanoemulsion, which includes:an oily phase dispersed in an aqueous phase;(i) at least one amphiphilic lipid selected from the group including nonionic amphiphilic lipids, anionic amphiphilic lipids, and combinations thereof; and(ii) at least one water-soluble nonionic polymer selected from the group including homopolymers and copolymers of ethylene oxide; polyvinyl alcohols; homopolymers and copolymers of vinylpyrrolidone; homopolymers and copolymers of vinylcaprolactam; homopolymers and copolymers of polyvinyl methyl ether; neutral acrylic homopolymers and copolymers; C1–C2alkyl celluloses and their derivatives; C1–C3alkyl guar; C1–C3hydroxyalkyl guar; and combinations thereof;wherein a ratio of the weight of the oily phase to the weight of the amphiphilic lipid (i) ranges from 1.2 to 10;and wherein the oily phase includes oil globules having a number-average size of less than 100 nm. The nanoemulsion obtained is preferably transparent and stable on storage. It may form a composition for topical, preferably cosmetic or dermatological compositions, pharmaceutical compositions and ophthalmological compositions.

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