Cosmetic compositions

Details Cosmetic compositions Cosmetic compositions

2003-01-28

2004-08-24

Page, Thurman K. (Department: 1616)

Drug, bio-affecting and body treating compositions

Preparations characterized by special physical form

Cosmetic, antiperspirant, dentifrice

C424S063000, C424S064000, C424S078030, C424S489000, C514S937000, C514S938000

Reexamination Certificate

active

06780422

ABSTRACT:

TECHNICAL FIELD
The invention is in the field of cosmetic compositions applied to the skin or hair.
BACKGROUND OF THE INVENTION
Cosmetic compositions are generally defined as compositions suitable for application to the human body. Cosmetic compositions such as creams and lotions are used to moisturize the skin and keep it in a smooth supple condition. Pigmented cosmetic compositions such as makeup, blush, lipstick, and eyeshadow, are used to color the skin and lips. Since color is one of the most important reasons for wearing cosmetics, color containing cosmetics must be very carefully formulated to provide maximum wear and effect.
One of the long standing problems with makeups such as face makeup, lipstick, mascara, and the like, is the tendency of the cosmetic to blot or transfer from the skin or lashes onto other surfaces such as glassware, silverware, or clothing. This not only creates soiling, but forces the cosmetic user to reapply cosmetic at fairly short intervals.
For example, traditional makeup compositions are either water and oil emulsions containing pigments, or they can be anhydrous systems containing waxes, oils and pigments. These formulations are applied and blended into the skin to provide color and correct skin topography to provide an even, smooth appearance. The films are simply deposited on the surface of the skin and if touched with fingers the product may transfer or become blotchy and uneven. Perspiration or sebum will break through the film and cause running or smearing. If skin comes into contact with clothing, the clothing may become soiled.
The object of this invention is to formulate a cosmetic with long lasting adherence to skin.
Another object of the invention is to formulate a cosmetic which yields a film which is not disturbed when blotted to remove sebum or perspiration.
Another object of the invention is to formulate a cosmetic which yields a film which does not readily transfer to clothing or utensils.
Another object of the invention is to formulate a cosmetic which yields a film which exhibits reduced permeability to oil and water.
SUMMARY OF THE INVENTION
The invention is directed to a cosmetic composition having improved transfer resistance comprising:
a) from about 0.1-60% by weight of trimethylated silica,
b) from about 0.1-60% by weight of a volatile solvent having a viscosity of 0.5 to 100 centipoise at 25° C., and
c) 0.1-60% of a nonvolatile oil having a-viscosity of 200 to 1,000,000 centipoise at 25° C.
d) 0.1-80% of a cosmetically acceptable carrier.
DETAILED DESCRIPTION
The composition of the invention contains 0.1-60%, preferably 0.5-50%, more preferably 1-30% trimethylated silica particles. One type of trimethylated silica in accordance with the invention has an average particle size of 0.5 to 100 millimicrons. The silica particles may be spheroidal or non-spheroidal, generally having a specific surface area of at least 300 m
2
/g. Preferably the trimethylated silica particles have a trimethylsilyl group density of 0.5 to 10 micromol/m
2
, and more preferably an alkoxy group density of 0.5 to 10 micrcmo/m2 and a silanel group density of 0.5 to 5 micromol/m
2
.It is preferred that the trimethylated silica particles are spherical. Such trimethylated silica particles in combination with volatile silicone are set forth in U.S. Pat. No. 4,983,388 which is hereby incorporated by reference. Another type of trimethylated silica in combination with a volatile solvent, which is used in the preferred embodiment of the invention, is a blend purchased from Dow Corning under the tradename Dow 2-0747 or 2-0749 cosmetic fluid which comprises approximately equal parts of a combination of volatile silicones (decaznethylcyclopentasiloxane and octamethylcyclotetrasiloxane) and trimethylated silica.
The volatile solvents of the invention generally have a low viscosity ranging from 0.5 to 100, preferably 0.5 to 20, and more preferably 0.5-10 centipoise at 25° C. Volatile solvents suitable in the composition of the invention include volatile low viscosity silicone fluids such as cyclic silicones having the formula:
wherein n=1-7. Volatile linear polydimethylsiloxanes are also suitable and generally have from about 2 to 9 silicon atoms and are of the formula:
(CH
3
)
3
Si—O—[—Si(CH
3
)
2
—O—]n—Si(CH
3
)
3
wherein n=0-7. These silicones are available from various sources including Dow Corning Corporation and General Electric. Dow Corning silicones are sold under the tradenames Dow Corning 244, 245, 344, 345, and 200 fluids. These fluids comprise octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, hexamethyldisiloxane, or mixtures thereof.
Also suitable as the volatile solvent component are straight or branched chain hydrocarbons having 8-20 carbon atoms, more preferably 10-16 carbon atoms. Suitable hydrocarbons are decane, dodecane, tetradecane, tridecane, and C8-20 isoparaffins as disclosed in U.S. Pat. Nos. 3,439,088 and 3,818,105, both of which are hereby incorporated by reference. Preferred volatile paraffinic hydrocarbons have a molecular weight of 160 to 180 and a boiling point range of 105 to 320 degrees C., a viscosity of less than 20 cs. at 25 degrees C. Such paraffinic hydrocarbons are available from EXXON under the ISOPARS trademark, and Permethyl Corporation. Such C
8-20
paraffinic hydrocarbons such as C
12
isoparaffin manufactured by the Permethyl Corporation having the tradename Permethyl 99A™, or a C
12
isoparaffin (isododecane) are distributed by Presperse having the tradename Permethyl 99A™. Various C
16
isoparaffins commercially available, such as isohexadecane (having the tradename Permethyl R™) are also suitable. The volatile solvent may be a mixture of volatile silicone and isoparaffins; a ratio of 1:20 to 20:1 respectively is suggested. The volatile solvent preferably ranges from 1-40%, or 5-30% by weight of the total composition.
Volatile silicone and trimethylated silica suitable for use in the invention can be made in accordance with U.S. Pat. No. 4,983,388 which is hereby incorporated by reference. The blend can also be purchased from Dow Corning Corporation under the tradenames Dow 2-0747 or 2-0749 cosmetic fluid, which comprise approximately equal parts of a combination of volatile silicones (decamethylcyclopentasiloxane and octamethylcyclotetrasiloxane) and trimethylated silica.
The nonvolatile oil has a viscosity ranging from 200 to 1,000,000 centipoise at 25° C., preferably 200 to 600,000 centipoise at 25° C., and ranges from 0.1-40%, preferably 0.5-30% by weight of the composition.
The nonvolatile oil may comprise esters of the formula RCO—OR′ wherein R and R′ are each independently a C
1-25
, preferably a C
4-20
straight or branched chain alkyl, alkenyl or alkoxy. Examples of such esters include isotridecyl isononanoate, PEG-4 diheptanoate, isostearyl neopentanoate, tridecyl neopentanoate, cetyl octanoate, cetyl palmitate, cetyl ricinoleate, cetyl stearate, cetyl myristate, coco-dicaprylate/caprate, decyl isostearate, isodecyl oleate, isodecyl neopentanoate, isohexyl neopentanoate, octyl palmitate, dioctyl malate, tridecyl octanoate, myristyl myristate, octododecanol, as well as the esters disclosed on pages 24-26 of the
C.T.F.A. Cosmetic Ingredient Handbook
, First Edition, 1988, which is hereby incorporated by reference.
The nonvolatile oil may also comprise high viscosity surface oils generally having a viscosity of 100,000 to 250,000 centipose at 25° C. Such surface oils include castor oil, lanolin, lanolin derivatives, triisocetyl citrate, C
10-18
triglycerides, caprylic/capric/triglycerides, coconut oil, corn oil, cottonseed oil, hydrogenated castor oil, linseed oil, mink oil, olive oil, palm oil, illipe butter, rapeseed oil, soybean oil, sunflower seed oil, tallow, tricaprin, trihydroxystearin, triisotearin, trilaurin, trilinolein, trimyristin, triolein, tripalmitin, tristearin, tribehenin, walnut oil, wheat germ oil, cholesterol, as well as the oils set forth on pages 26-27 of the
C.T.F.A. Cosmetic Ingredient Handbook
, First Edition, 1988, which is hereby i

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