Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Cosmetic – antiperspirant – dentifrice
Patent
1996-10-29
1999-07-06
Venkat, Jyothsna
Drug, bio-affecting and body treating compositions
Preparations characterized by special physical form
Cosmetic, antiperspirant, dentifrice
424 69, 424 7802, A61K 748
Patent
active
059194677
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to powder cosmetic compositions. In particular, it relates to powder cosmetic compositions for purposes of make-up and the like which provide improved adhesion to the skin, increased wear, coverage and reduced rub-off.
BACKGROUND OF THE INVENTION
Make-up compositions are generally available in the form of liquid or cream suspensions, emulsions, gels, anhydrous oil and wax compositions or pressed and loose powders.
Make-up is normally applied to the face in two stages. In a first stage, a liquid or cream foundation is applied. This is followed by application of a powder composition, the function of which is to impart a smooth finish to facial skin, masking minor visible imperfections and shine.
W088/00039 discloses a pressed facial cosmetic powder comprising a blend of moisturising and oil absorbing clays, filler, dry binder and liquid binder.
U.S. Pat. No. 4,804,532 recites a facial cosmetic powder which utilises crystalline silica in much lower concentration than that employed in the then prior art compositions. This powder, used as a blush or a facial coating, is said to be effective in hiding skin wrinkles, lines and pores. The composition is a mixture of a colour phase and a diluent phase. The colour phase is formed by blending crystalline silica with colourants. The resultant colour phase is mixed with the diluent phase, essentially formed from nacreous materials such as talc and mica, to form the composition.
Pressed and loose cosmetic powder compositions for application to the face are well-known and help to provide good skin coverage and appearance with reduced shine, especially when used with foundations. It would however be desirable to improve the substantivity characteristics such as improved skin adhesion, wear and coverage of cosmetic powder compositions. It would also be desirable to provide a powder composition having prolonged topical anti-acne and/or anti-bacterial activity. There are many compounds which are known to exhibit anti-acne and/or anti-bacterial properties when applied topically to the skin. A commonly used keratolytic agent having anti-acne activity is salicylic acid. Zinc oxide is also known for use in anti-acne compositions.
CN-A-1032902 discloses a skin disease treatment and protection powder containing borax, zinc oxide, benzoic acid, talcum powder and salicylic acid.
It is accordingly a primary object of this invention to provide a powder cosmetic composition having improved skin adhesion, wear and coverage and reduced rub-off. It is also an object of the present invention to provide a powder cosmetic composition having anti-acne activity over extended periods of time.
SUMMARY OF THE INVENTION
According to the present invention there is provided a cosmetic composition in the form of a powder comprising: silicones, the silicone or silicone mixture comprising an alkylmethylsiloxane polymer having the formula: ##STR1## wherein x has a value of from 1 to about 1,000, y has a value of from 0 to 1,000 and R is selected from H and C.sub.1 -C.sub.50 alkyl; and selected from pigments, matte finishing agents, fillers and binders, and mixtures thereof.
The powder cosmetic compositions of the present invention provide improved adhesion to the skin, coverage and wear characteristics. Highly preferred embodiments also provide excellent anti-acne activity. According to another aspect of the present invention there is provided a cosmetic composition in the form of a powder comprising; hydrocarbon having a weight average molecular weight of from about 100 to about 15,000; and base components selected from pigments, matte finishing agents, fillers and binders and mixtures thereof.
All levels and ratios are by weight of total composition, unless otherwise indicated. Chain length, degrees of alkoxylation and molecular weights are also specified on a weight average basis.
DETAILED DESCRIPTION OF THE INVENTION
The powder cosmetic composition according to one aspect of the present invention comprises a silicone or mixture of silicones tog
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Briggs Gillian Scott
Fish Karen
Jenkins Delyth Myfanwy
Allen George W.
Henderson Loretta J.
Suter David L.
The Proctor & Gamble Company
Venkat Jyothsna
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