Amino acid silicon polymer, method for preparing the same, cosmetic particles surface-treated with the same, and cosmetic composition containing the particles
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United States of America Patent
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Jul 31, 2001
Issued Date -
N/A
app pub date -
Feb 17, 2000
filing date -
Oct 6, 1999
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Abstract
The invention relates to a novel amino acid silicon polymer with good adhesion to the keratin layer of the skin, a method of preparing the amino acid silicon polymer, a cosmetic particles surface-treated with the amino acid silicon polymer, and a color cosmetic composition including the cosmetic particles. According to the present invention, the particles surface-treated up to 3% to the maximum with the amino acid silicon polymer prepared by reacting an amino acid and a functional silicon polymer in the manner of organic synthesis have water resistance and usability peculiar to silicon-treated pigments and take positive surface charges, thereby offering good adhesion to the skin and durability. Due to these characteristics, the cosmetic containing the surface-treated particles of the present invention is superior in the cosmetic effect to that containing the conventional surface-treated particles.
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