Process for preparing an insulating material

摘要

Process for manufacturing a thermally insulating material comprising the following steps:
a) preparing an aqueous mixture of a solid mineral substance in suspension having a specific surface area S of greater than 5 m2/g;b) adding to the mixture at least one pore-forming agent;c) stirring so as to obtain a homogeneous mixture;d) preforming a substrate from the homogeneous mixture;e) optionally drying the substrate at least partially;f) removing, at least partially, the pore-forming agent;

and such that said specific surface area S, expressed in m2/g and measured by BET, and the mean particle diameter Dpm of the pore-forming agents, expressed in micrometers and measured by dynamic light scattering, obey the relation:
1/S

主权项

1. A process for manufacturing a thermally insulating material, the process comprising:
a) preparing an aqueous mixture of a solid mineral substance in suspension having a specific surface area S of greater than 5 m2/g; b) adding at least one pore-forming agent comprising particles, to the aqueous mixture, to obtain an intermediate mixture; c) stirring the intermediate mixture, to obtain a homogeneous mixture; d) preforming a substrate from the homogeneous mixture; e) optionally, drying the substrate at least partially; f) removing, at least partially, the pore-forming agent; wherein a specific surface area S, expressed in m2/g and measured by BET, and a mean particle diameter Dpm of the particles of the at least one pore-forming agent, expressed in micrometers and measured by dynamic light scattering, satisfy the relation:
1/S