| 摘要 |
<p>The invention relates to an "anti-fire" glazing having a set of at least two panes of glass, between which there are located at least two layers of intumescent material based on hydrated alkali metal silicate, the compositions of these two layers differing from one another, one having a molar SiO2/Na2O ratio greater than 3.5 and the other having a molar ratio less than 3.2.</p> |
