| 摘要 |
The invention relates to a method for preparing an additive based on metal hydroxide and, in particular, magnesium hydroxide, to be integrated into coatings in order to provide same with improved fire retardant properties. The average particle sizes of the hydroxide are selected from between 1 nanometre and 10 micrometres, preferably with a very small variation. The magnesium hydroxide is subjected to a washing and dispersion treatment so that it disperses efficiently and does not interfere with the desirable properties of the coating. The materials and conditions used in the treatment and the particle size are selected according to the type of coating. The end coating can be based on water, solvents, oil and alcohol. Compared to coatings formulated with other fire retardant compounds, smaller weight losses due to burning have been demonstrated with the inventive additive in an ASTM D1360 standard test.
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