Amino acid silicon polymer, method for preparing the same, cosmetic particles surface-treated with the same, and cosmetic composition containing the particles
US6268454A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 17, 2000 |
| Grant date | Jul 31, 2001 |
| Priority date | — |
| Expiry date | Feb 17, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G77/388
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.