Composite particle and process for producing the same
US7691413B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 22, 2005 |
| Grant date | Apr 6, 2010 |
| Priority date | — |
| Expiry date | Oct 5, 2027 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2323/04
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The invention provides a composite particle, a process for producing the same, and cosmetics containing the same The invention relates to composite particles containing a polyolefin-based resin having a crystallization degree of 80% or less and zinc oxide and obtained by hot melt microencapsulation or spray cooling, or composite particles containing a polyolefin-based resin having a crystallization degree of 80% or less and zinc oxide, wherein the degree of remaining zinc oxide in the particles is 50 wt % or more after being dipped for 1 hour in 0.5 mol/L hydrochloric acid solution at 25° C. (solution composition: water and ethanol in equal volumes), a process for producing the composite particles, and cosmetics containing the composite particles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.