METHOD FOR PRODUCING ORGANICALLY MODIFIED AEROGELS
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United States of America Patent
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Apr 21, 2016
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Apr 29, 2015
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Abstract
The invention relates to a method for producing organically modified aerogels. The problem addressed by the invention is that of providing an economical method for producing hydrophobic aerogels which can be implemented cost-effectively, simply, and safely, and which operates to save on resources. This problem is solved by the provision of a method for producing organically modified aerogels, wherein a sol containing [SiO4,2] units is produced, and the sol obtained is dispersed in a continuous phase. The sol forms a separate phase and the continuous phase contains at least 20 wt % organosiloxane, a gel is formed from the sol in the continuous phase, and the gel obtained is surface-modified in the presence of a phase mediator in the continuous phase, wherein acids or chlorosilanes or mixtures thereof are added as initiator and the gels obtained are dried. The aerogels provided can be used as insulating materials, in particular in thermal insulation.
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