FIELD: chemistry.
SUBSTANCE: invention can be used in electronic industry. A method of producing silicon dioxide particles, wherein water-absorption capacity is less than 1.0% when measured 500 hours after holding at 50°C and humidity of 90% and at 85°C and humidity of 85% D90/D10 is 3 or less, absolute density is 2.1 g/cm3 or higher, and the mean particle diameter is 10 mcm or less. The method includes a step (1) of producing silicon dioxide particles by hydrolysis of tetraethoxysilane and/or a derivative thereof and a step (2) of annealing the silicon dioxide particles obtained at step (1) at 900-1050°C. A sealing polymer composition contains said silicon dioxide particles.
EFFECT: invention enables to obtain silicon dioxide particles having a narrow size distribution and low water-absorption capacity, which are suitable for use as filler for a sealing polymer composition.
7 cl, 3 tbl, 27 ex, 2 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| ANTI-FOGGING ARTICLE AND METHOD FOR MAKING SAME | 2011 |
|
RU2593871C2 |
| ORAL CAVITY-CARE COMPOSITION | 1995 |
|
RU2139034C1 |
| MULTICOMPONENT COMPOSITION FORMING AN INSULATING LAYER, AND USE THEREOF | 2016 |
|
RU2723845C2 |
| COATING COMPOSITION | 2017 |
|
RU2738655C2 |
| COMPOSITE ARTICLE | 2019 |
|
RU2786975C2 |
| LATEX FOR ADHESIVE COMPOSITION AND ADHESIVE COMPOSITION | 2019 |
|
RU2809819C2 |
| OPTICAL FIBRE CORE | 2011 |
|
RU2559519C2 |
| SIZE OF SPHERICAL SILICON DIOXIDE PARTICLES INTENDED FOR REGULATION OF IRD | 2018 |
|
RU2798833C2 |
| SYSTEM FOR PRETREATMENT OF ZINC PHOSPHATE, WHICH DOES NOT CONTAIN NICKEL | 2017 |
|
RU2728341C2 |
| SUPERABSORBENT POLYMERS CAPABLE OF FAST ABSORPTION AND SYNTHESIS METHOD THEREOF | 2012 |
|
RU2586214C2 |
