Method for producing fine mesoporous silica particles, fine mesoporous silica particles, liquid dispersion of fine mesoporous silica particles, composition containing fine mesoporous silica particles and molded article containing fine mesoporous silica particles
US8999052B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | May 18, 2010 |
| Grant date | Apr 7, 2015 |
| Priority date | — |
| Expiry date | Dec 14, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2982
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Fine mesoporous silica particles are provided by which not only the functions of low reflectance (Low-n), low dielectric constant (Low-k) and low thermal conductivity but also improved strength of a molded article are achieved. The fine mesoporous silica particles are manufactured by a process including a surfactant composite fine silica particle preparation step and a mesoporous particle formation step. In the silica fine particle preparation step, a surfactant, water, an alkali and a hydrophobic part-containing additive including a hydrophobic part for increasing the volume of micelles are mixed with a silica source to thereby prepare surfactant composite fine silica particles. In the mesoporous particle formation step, the mixture is mixed with an acid and an organosilicon compound to thereby remove the surfactant and hydrophobic part-containing additive from the surfactant composite fine silica particles and provide the surface of each silica fine particle with an organic functional group. The fine mesoporous silica particles have mesopores inside each particle, and are modified on the surface with organic functional groups.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.