FIELD: chemistry.
SUBSTANCE: particles contain inner coating layer that consist of at least one hydrate-forming mineral salt, and outer coating layer, including 0.2-3 wt % alkali metal silicate with module more than 2.5, particularly 3 to 5. Outer layer is obtained using alkali metal silicate solution with alkali metal silicate concentration 2 to 20 wt %. Dissolution time can be extended by alkali metal silicate concentration lowering in solution used, coating material amount being the same. Dissolution time can be extended significantly according to coating layers sequence and solution concentration with low quantity of alkali metal silicate.
EFFECT: extension of dissolution time.
18 cl, 7 tbl, 18 ex
| Title | Year | Author | Number |
|---|---|---|---|
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| SODIUM PERCARBONATE PARTICLES WITH INCREASED STABILITY DURING STORAGE | 2003 |
|
RU2337135C2 |
| METHOD OF PRODUCING SODIUM PERCARBONATE PARTICLES COATED WITH SHELL | 2008 |
|
RU2454365C2 |
| METHOD OF STABILIZING ALKALI METAL PERCARBONATE | 1994 |
|
RU2136584C1 |
