Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From silicon reactant having at least one...
Patent
1994-08-29
1996-08-20
Glass, Margaret W.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From silicon reactant having at least one...
528 31, 528 42, 556448, C08G 77385, C08G 7724
Patent
active
055480543
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a fluorine-modified silicone derivative, a preparation process thereof, and cosmetic compositions containing such a silicone derivative, and more particularly to a novel fluorine-modified silicone derivative having excellent water and oil repellency, a preparation process thereof, and cosmetic compositions containing such a silicone derivative and having good lastingness of makeup and feeling upon use.
BACKGROUND ART
Various water-repellent cosmetic compositions have heretofore been used with a view toward protecting the skin from water and sweat and preventing makeup from getting out of shape by water or sweat. For example, skin care cosmetic compositions such as skin creams and skin lotions, and makeup cosmetic compositions comprise a silicone oil or silicone resin as a water-repellent component. However, these silicone oil and resin can exhibit some effect on water repellency, but has no satisfactory effect on oil repellency. Therefore, cosmetic compositions in which these components are incorporated have a problem that they can not last makeup longer due to the excretion of sebum.
Therefore, attempts to develop a compound having both water repellency and oil repellency have been made in various fields. For example, Japanese Patent Application Laid-Open No. 295912/1990 discloses that a cosmetic composition in which a specific fluorine-modified silicone compound is incorporated is excellent in water resistance and sebum resistance.
Water- and oil-repellent base substances used in cosmetic compositions are required to satisfy all such conditions that (a) they have sufficient water and oil repellency for sweat and sebum, (b) they are excellent in emulsion stability and (c) they are not sticky to the touch and good in feeling upon use.
However, the above-described fluorine-modified silicone compound does not fully satisfy these requirements, in particular, oil repellency.
Accordingly, there has been a demand for development of a compound which is excellent in water and oil repellency, and moreover can last makeup longer when incorporated in a cosmetic composition and gives a user of the cosmetic composition a good feeling upon use.
In view of the foregoing circumstances, the present inventors have carried out an extensive investigation. As a result, it has been found that a specific fluorine-modified silicone derivative, which will be described subsequently, has excellent water and oil repellency and exhibits good compatibility with cosmetic components, thus leading to completion of the present invention.
DISCLOSURE OF THE INVENTION
The present invention is directed to a cosmetic composition comprising a fluorine-modified silicone derivative (A) having polysiloxane units selected from structural units represented by the following general formulae (1), (2) and (3) and polysiloxane units represented by the following general formula (4): ##STR2## wherein Rf and Rf' mean individually a perfluoroalkyl group having 1-20 carbon atoms or a .omega.-H-perfluoroalkyl group represented by the formula H(CF.sub.2).sub.t -- in which t stands for an integer of 1-20, R.sup.1, R.sup.4 and R.sup.5 may be identical with or different from each other and mean individually a straight-chain or branched aliphatic hydrocarbon group having 1-20 carbon atoms, or an alicyclic or aromatic hydrocarbon group having 5-10 carbon atoms, R.sup.2 denotes a hydrogen atom, a straight-chain or branched aliphatic hydrocarbon group having 1-20 carbon atoms, an alicyclic or aromatic hydrocarbon group having 5-10 carbon atoms, a perfluoroalkyl group having 1-20 carbon atoms, or a .omega.-H-perfluoroalkyl group represented by the formula H(CF.sub.2).sub.u -- in which u stands for an integer of 1-20, R.sup.3 is a divalent hydrocarbon group having 2-16 carbon atoms, X and Y mean individually a single bond, --CO-- or a divalent hydrocarbon group having 1-6 carbon atoms, l stands for a number of 2-16, m and n are individually a number of 1-6, p is a number of 1-200, r is a number of 0-50, and s is a
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Abstract JP 405247214 Sep. 1993.
Asahi Masahiko
Kawamata Akira
Nagatani Noboru
Okada Jouji
Tokunaga Tadayuki
Glass Margaret W.
Kao Corporation
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